./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_hash_iter_done_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a92970c-ae51-425f-bb80-6a31d640db49/bin/uautomizer-YU5uOKAj3y/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a92970c-ae51-425f-bb80-6a31d640db49/bin/uautomizer-YU5uOKAj3y/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a92970c-ae51-425f-bb80-6a31d640db49/bin/uautomizer-YU5uOKAj3y/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a92970c-ae51-425f-bb80-6a31d640db49/bin/uautomizer-YU5uOKAj3y/config/AutomizerReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_hash_iter_done_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a92970c-ae51-425f-bb80-6a31d640db49/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a92970c-ae51-425f-bb80-6a31d640db49/bin/uautomizer-YU5uOKAj3y --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 03b17f77ffc9b60dd6edfa1d1cf71f248568a9cd6bbbccab8c3e61d5773c4168 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 17:47:06,059 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 17:47:06,064 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 17:47:06,142 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 17:47:06,144 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 17:47:06,150 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 17:47:06,152 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 17:47:06,157 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 17:47:06,161 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 17:47:06,168 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 17:47:06,169 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 17:47:06,172 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 17:47:06,172 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 17:47:06,176 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 17:47:06,179 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 17:47:06,185 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 17:47:06,188 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 17:47:06,189 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 17:47:06,192 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 17:47:06,205 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 17:47:06,208 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 17:47:06,210 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 17:47:06,214 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 17:47:06,216 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 17:47:06,227 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 17:47:06,228 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 17:47:06,228 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 17:47:06,231 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 17:47:06,232 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 17:47:06,233 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 17:47:06,234 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 17:47:06,235 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 17:47:06,238 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 17:47:06,239 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 17:47:06,241 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 17:47:06,242 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 17:47:06,243 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 17:47:06,243 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 17:47:06,243 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 17:47:06,245 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 17:47:06,246 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 17:47:06,247 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a92970c-ae51-425f-bb80-6a31d640db49/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-13 17:47:06,302 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 17:47:06,303 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 17:47:06,304 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-13 17:47:06,304 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-13 17:47:06,313 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 17:47:06,314 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 17:47:06,315 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-13 17:47:06,315 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-13 17:47:06,315 INFO L138 SettingsManager]: * Use SBE=true [2021-11-13 17:47:06,316 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 17:47:06,317 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 17:47:06,318 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 17:47:06,318 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 17:47:06,318 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 17:47:06,319 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 17:47:06,319 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 17:47:06,319 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 17:47:06,319 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 17:47:06,320 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 17:47:06,320 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 17:47:06,320 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 17:47:06,321 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 17:47:06,321 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 17:47:06,321 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 17:47:06,322 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 17:47:06,322 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-13 17:47:06,322 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 17:47:06,323 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-13 17:47:06,323 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-13 17:47:06,323 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 17:47:06,323 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 17:47:06,324 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_3a92970c-ae51-425f-bb80-6a31d640db49/bin/uautomizer-YU5uOKAj3y/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a92970c-ae51-425f-bb80-6a31d640db49/bin/uautomizer-YU5uOKAj3y Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 03b17f77ffc9b60dd6edfa1d1cf71f248568a9cd6bbbccab8c3e61d5773c4168 [2021-11-13 17:47:06,747 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 17:47:06,773 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 17:47:06,777 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 17:47:06,778 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 17:47:06,779 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 17:47:06,781 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a92970c-ae51-425f-bb80-6a31d640db49/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/aws-c-common/aws_hash_iter_done_harness.i [2021-11-13 17:47:06,870 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a92970c-ae51-425f-bb80-6a31d640db49/bin/uautomizer-YU5uOKAj3y/data/fe46cbd87/3fe49d7fafab46ba80de388e4cd4d3d2/FLAGdfa10be4e [2021-11-13 17:47:07,938 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 17:47:07,939 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a92970c-ae51-425f-bb80-6a31d640db49/sv-benchmarks/c/aws-c-common/aws_hash_iter_done_harness.i [2021-11-13 17:47:08,011 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a92970c-ae51-425f-bb80-6a31d640db49/bin/uautomizer-YU5uOKAj3y/data/fe46cbd87/3fe49d7fafab46ba80de388e4cd4d3d2/FLAGdfa10be4e [2021-11-13 17:47:08,249 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a92970c-ae51-425f-bb80-6a31d640db49/bin/uautomizer-YU5uOKAj3y/data/fe46cbd87/3fe49d7fafab46ba80de388e4cd4d3d2 [2021-11-13 17:47:08,252 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 17:47:08,255 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 17:47:08,260 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 17:47:08,260 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 17:47:08,265 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 17:47:08,266 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 05:47:08" (1/1) ... [2021-11-13 17:47:08,269 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c9ff469 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:47:08, skipping insertion in model container [2021-11-13 17:47:08,270 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 05:47:08" (1/1) ... [2021-11-13 17:47:08,278 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 17:47:08,454 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 17:47:08,818 WARN L228 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_3a92970c-ae51-425f-bb80-6a31d640db49/sv-benchmarks/c/aws-c-common/aws_hash_iter_done_harness.i[4492,4505] [2021-11-13 17:47:08,828 WARN L228 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_3a92970c-ae51-425f-bb80-6a31d640db49/sv-benchmarks/c/aws-c-common/aws_hash_iter_done_harness.i[4552,4565] [2021-11-13 17:47:08,866 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-13 17:47:08,874 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-13 17:47:10,424 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 17:47:10,431 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 17:47:10,433 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 17:47:10,435 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 17:47:10,439 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 17:47:10,468 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 17:47:10,469 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 17:47:10,471 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 17:47:10,472 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 17:47:10,475 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 17:47:10,476 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 17:47:10,478 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 17:47:10,490 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 17:47:11,140 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-13 17:47:11,142 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-13 17:47:11,143 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-13 17:47:11,145 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-13 17:47:11,147 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-13 17:47:11,148 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-13 17:47:11,149 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-13 17:47:11,150 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-13 17:47:11,151 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-13 17:47:11,152 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-13 17:47:11,449 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-13 17:47:11,932 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 17:47:11,933 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 17:47:11,962 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 17:47:11,964 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 17:47:11,983 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 17:47:11,984 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 17:47:12,014 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 17:47:12,018 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 17:47:12,019 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 17:47:12,020 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 17:47:12,020 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 17:47:12,021 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 17:47:12,021 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 17:47:12,092 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 17:47:12,155 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 17:47:12,195 WARN L228 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_3a92970c-ae51-425f-bb80-6a31d640db49/sv-benchmarks/c/aws-c-common/aws_hash_iter_done_harness.i[4492,4505] [2021-11-13 17:47:12,196 WARN L228 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_3a92970c-ae51-425f-bb80-6a31d640db49/sv-benchmarks/c/aws-c-common/aws_hash_iter_done_harness.i[4552,4565] [2021-11-13 17:47:12,198 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-13 17:47:12,199 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-13 17:47:12,266 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 17:47:12,266 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 17:47:12,267 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 17:47:12,267 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 17:47:12,268 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 17:47:12,281 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 17:47:12,282 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 17:47:12,283 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 17:47:12,283 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 17:47:12,286 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 17:47:12,286 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 17:47:12,287 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 17:47:12,287 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 17:47:12,336 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-13 17:47:12,337 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-13 17:47:12,338 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-13 17:47:12,339 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-13 17:47:12,340 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-13 17:47:12,341 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-13 17:47:12,341 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-13 17:47:12,342 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-13 17:47:12,343 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-13 17:47:12,343 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-13 17:47:12,424 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-13 17:47:12,571 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 17:47:12,572 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 17:47:12,584 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 17:47:12,585 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 17:47:12,589 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 17:47:12,590 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 17:47:12,609 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 17:47:12,610 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 17:47:12,611 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 17:47:12,611 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 17:47:12,612 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 17:47:12,613 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 17:47:12,613 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 17:47:12,638 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 17:47:13,144 INFO L208 MainTranslator]: Completed translation [2021-11-13 17:47:13,145 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:47:13 WrapperNode [2021-11-13 17:47:13,146 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 17:47:13,147 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 17:47:13,147 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 17:47:13,148 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 17:47:13,158 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:47:13" (1/1) ... [2021-11-13 17:47:13,320 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:47:13" (1/1) ... [2021-11-13 17:47:13,473 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 17:47:13,475 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 17:47:13,476 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 17:47:13,476 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 17:47:13,487 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:47:13" (1/1) ... [2021-11-13 17:47:13,488 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:47:13" (1/1) ... [2021-11-13 17:47:13,508 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:47:13" (1/1) ... [2021-11-13 17:47:13,509 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:47:13" (1/1) ... [2021-11-13 17:47:13,587 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:47:13" (1/1) ... [2021-11-13 17:47:13,591 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:47:13" (1/1) ... [2021-11-13 17:47:13,606 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:47:13" (1/1) ... [2021-11-13 17:47:13,623 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 17:47:13,624 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 17:47:13,625 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 17:47:13,625 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 17:47:13,626 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:47:13" (1/1) ... [2021-11-13 17:47:13,649 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 17:47:13,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a92970c-ae51-425f-bb80-6a31d640db49/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:47:13,677 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a92970c-ae51-425f-bb80-6a31d640db49/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 17:47:13,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a92970c-ae51-425f-bb80-6a31d640db49/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 17:47:13,739 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2021-11-13 17:47:13,739 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-13 17:47:13,740 INFO L130 BoogieDeclarations]: Found specification of procedure aws_hash_iter_done [2021-11-13 17:47:13,740 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_hash_iter_done [2021-11-13 17:47:13,740 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2021-11-13 17:47:13,740 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2021-11-13 17:47:13,741 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-13 17:47:13,741 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-13 17:47:13,741 INFO L130 BoogieDeclarations]: Found specification of procedure hash_table_state_is_valid [2021-11-13 17:47:13,741 INFO L138 BoogieDeclarations]: Found implementation of procedure hash_table_state_is_valid [2021-11-13 17:47:13,741 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-13 17:47:13,742 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-13 17:47:13,742 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 17:47:13,742 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 17:47:13,743 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-11-13 17:47:13,743 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-11-13 17:47:13,743 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2021-11-13 17:47:13,743 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2021-11-13 17:47:13,743 INFO L130 BoogieDeclarations]: Found specification of procedure __builtin_uaddl_overflow [2021-11-13 17:47:13,744 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 17:47:13,744 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_plus [2021-11-13 17:47:13,744 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_plus [2021-11-13 17:47:13,744 INFO L130 BoogieDeclarations]: Found specification of procedure __builtin_umull_overflow [2021-11-13 17:47:13,745 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-13 17:47:13,745 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-11-13 17:47:13,745 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-11-13 17:47:13,745 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-13 17:47:13,745 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_power_of_two [2021-11-13 17:47:13,746 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_power_of_two [2021-11-13 17:47:13,746 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-13 17:47:13,746 INFO L130 BoogieDeclarations]: Found specification of procedure hash_table_state_required_bytes [2021-11-13 17:47:13,746 INFO L138 BoogieDeclarations]: Found implementation of procedure hash_table_state_required_bytes [2021-11-13 17:47:13,746 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-13 17:47:13,747 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-13 17:47:13,747 INFO L130 BoogieDeclarations]: Found specification of procedure aws_hash_iter_is_valid [2021-11-13 17:47:13,747 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_hash_iter_is_valid [2021-11-13 17:47:13,748 INFO L130 BoogieDeclarations]: Found specification of procedure aws_hash_table_is_valid [2021-11-13 17:47:13,748 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_hash_table_is_valid [2021-11-13 17:47:13,749 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-13 17:47:13,750 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2021-11-13 17:47:13,752 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2021-11-13 17:47:13,753 INFO L130 BoogieDeclarations]: Found specification of procedure aws_add_size_checked [2021-11-13 17:47:13,753 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_add_size_checked [2021-11-13 17:47:13,753 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-13 17:47:25,890 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 17:47:25,890 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-13 17:47:25,893 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 05:47:25 BoogieIcfgContainer [2021-11-13 17:47:25,893 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 17:47:25,896 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 17:47:25,896 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 17:47:25,904 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 17:47:25,905 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 05:47:08" (1/3) ... [2021-11-13 17:47:25,906 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@351c26ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 05:47:25, skipping insertion in model container [2021-11-13 17:47:25,906 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:47:13" (2/3) ... [2021-11-13 17:47:25,906 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@351c26ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 05:47:25, skipping insertion in model container [2021-11-13 17:47:25,907 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 05:47:25" (3/3) ... [2021-11-13 17:47:25,908 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_hash_iter_done_harness.i [2021-11-13 17:47:25,916 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 17:47:25,916 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 17:47:25,996 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 17:47:26,010 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-13 17:47:26,010 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 17:47:26,052 INFO L276 IsEmpty]: Start isEmpty. Operand has 157 states, 100 states have (on average 1.23) internal successors, (123), 101 states have internal predecessors, (123), 40 states have call successors, (40), 15 states have call predecessors, (40), 15 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2021-11-13 17:47:26,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-11-13 17:47:26,072 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:47:26,073 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:47:26,074 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:47:26,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:47:26,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1143533925, now seen corresponding path program 1 times [2021-11-13 17:47:26,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:47:26,094 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864444003] [2021-11-13 17:47:26,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:47:26,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:47:26,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:27,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 17:47:27,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:27,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-13 17:47:27,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:27,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-13 17:47:27,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:27,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-13 17:47:27,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:27,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-13 17:47:27,339 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:47:27,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864444003] [2021-11-13 17:47:27,340 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2021-11-13 17:47:27,340 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172407482] [2021-11-13 17:47:27,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:47:27,341 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:47:27,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a92970c-ae51-425f-bb80-6a31d640db49/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:47:27,345 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a92970c-ae51-425f-bb80-6a31d640db49/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:47:27,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a92970c-ae51-425f-bb80-6a31d640db49/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-13 17:47:28,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:28,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 2731 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-13 17:47:28,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:47:29,397 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2021-11-13 17:47:29,398 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 17:47:29,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172407482] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:47:29,399 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:47:29,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-13 17:47:29,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552756638] [2021-11-13 17:47:29,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:47:29,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-13 17:47:29,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:47:29,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-13 17:47:29,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 17:47:29,457 INFO L87 Difference]: Start difference. First operand has 157 states, 100 states have (on average 1.23) internal successors, (123), 101 states have internal predecessors, (123), 40 states have call successors, (40), 15 states have call predecessors, (40), 15 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) Second operand has 2 states, 2 states have (on average 28.0) internal successors, (56), 2 states have internal predecessors, (56), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-13 17:47:29,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:47:29,549 INFO L93 Difference]: Finished difference Result 306 states and 418 transitions. [2021-11-13 17:47:29,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-13 17:47:29,552 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 28.0) internal successors, (56), 2 states have internal predecessors, (56), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 140 [2021-11-13 17:47:29,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:47:29,571 INFO L225 Difference]: With dead ends: 306 [2021-11-13 17:47:29,573 INFO L226 Difference]: Without dead ends: 151 [2021-11-13 17:47:29,583 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 17:47:29,596 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.89ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-13 17:47:29,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 7.89ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-13 17:47:29,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-11-13 17:47:29,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2021-11-13 17:47:29,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 95 states have (on average 1.2210526315789474) internal successors, (116), 96 states have internal predecessors, (116), 40 states have call successors, (40), 15 states have call predecessors, (40), 15 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2021-11-13 17:47:29,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 195 transitions. [2021-11-13 17:47:29,704 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 195 transitions. Word has length 140 [2021-11-13 17:47:29,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:47:29,705 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 195 transitions. [2021-11-13 17:47:29,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 28.0) internal successors, (56), 2 states have internal predecessors, (56), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-13 17:47:29,706 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 195 transitions. [2021-11-13 17:47:29,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-11-13 17:47:29,715 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:47:29,716 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:47:29,774 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a92970c-ae51-425f-bb80-6a31d640db49/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-13 17:47:29,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a92970c-ae51-425f-bb80-6a31d640db49/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-11-13 17:47:29,917 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:47:29,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:47:29,918 INFO L85 PathProgramCache]: Analyzing trace with hash 611203689, now seen corresponding path program 1 times [2021-11-13 17:47:29,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:47:29,918 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033421345] [2021-11-13 17:47:29,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:47:29,919 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:47:30,119 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-13 17:47:30,120 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1282644950] [2021-11-13 17:47:30,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:47:30,121 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:47:30,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a92970c-ae51-425f-bb80-6a31d640db49/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:47:30,122 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a92970c-ae51-425f-bb80-6a31d640db49/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:47:30,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a92970c-ae51-425f-bb80-6a31d640db49/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-13 17:47:31,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:31,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 2731 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-13 17:47:31,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:47:32,172 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 115 proven. 20 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-13 17:47:32,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:47:32,825 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-11-13 17:47:32,825 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:47:32,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033421345] [2021-11-13 17:47:32,826 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 17:47:32,826 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282644950] [2021-11-13 17:47:32,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282644950] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 17:47:32,826 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 17:47:32,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-11-13 17:47:32,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508821646] [2021-11-13 17:47:32,827 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 17:47:32,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-13 17:47:32,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:47:32,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-13 17:47:32,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-13 17:47:32,831 INFO L87 Difference]: Start difference. First operand 151 states and 195 transitions. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 6 states have call successors, (44), 3 states have call predecessors, (44), 4 states have return successors, (42), 6 states have call predecessors, (42), 6 states have call successors, (42) [2021-11-13 17:47:33,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:47:33,320 INFO L93 Difference]: Finished difference Result 274 states and 354 transitions. [2021-11-13 17:47:33,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 17:47:33,325 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 6 states have call successors, (44), 3 states have call predecessors, (44), 4 states have return successors, (42), 6 states have call predecessors, (42), 6 states have call successors, (42) Word has length 140 [2021-11-13 17:47:33,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:47:33,331 INFO L225 Difference]: With dead ends: 274 [2021-11-13 17:47:33,331 INFO L226 Difference]: Without dead ends: 153 [2021-11-13 17:47:33,332 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 272 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-11-13 17:47:33,334 INFO L933 BasicCegarLoop]: 158 mSDtfsCounter, 221 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 255.34ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 597 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.58ms SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 335.76ms IncrementalHoareTripleChecker+Time [2021-11-13 17:47:33,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 597 Invalid, 186 Unknown, 0 Unchecked, 13.58ms Time], IncrementalHoareTripleChecker [59 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 335.76ms Time] [2021-11-13 17:47:33,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-11-13 17:47:33,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2021-11-13 17:47:33,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 96 states have (on average 1.21875) internal successors, (117), 98 states have internal predecessors, (117), 40 states have call successors, (40), 15 states have call predecessors, (40), 16 states have return successors, (41), 39 states have call predecessors, (41), 39 states have call successors, (41) [2021-11-13 17:47:33,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 198 transitions. [2021-11-13 17:47:33,359 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 198 transitions. Word has length 140 [2021-11-13 17:47:33,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:47:33,360 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 198 transitions. [2021-11-13 17:47:33,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 6 states have call successors, (44), 3 states have call predecessors, (44), 4 states have return successors, (42), 6 states have call predecessors, (42), 6 states have call successors, (42) [2021-11-13 17:47:33,361 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 198 transitions. [2021-11-13 17:47:33,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-13 17:47:33,364 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:47:33,365 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:47:33,474 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a92970c-ae51-425f-bb80-6a31d640db49/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-13 17:47:33,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a92970c-ae51-425f-bb80-6a31d640db49/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:47:33,585 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:47:33,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:47:33,585 INFO L85 PathProgramCache]: Analyzing trace with hash -1045405273, now seen corresponding path program 1 times [2021-11-13 17:47:33,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:47:33,585 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826507781] [2021-11-13 17:47:33,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:47:33,586 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:47:33,770 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-13 17:47:33,770 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [455430844] [2021-11-13 17:47:33,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:47:33,771 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:47:33,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a92970c-ae51-425f-bb80-6a31d640db49/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:47:33,772 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a92970c-ae51-425f-bb80-6a31d640db49/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:47:33,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a92970c-ae51-425f-bb80-6a31d640db49/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-13 17:47:34,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:34,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 2736 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 17:47:34,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:47:35,599 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 67 proven. 75 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-13 17:47:35,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:47:36,232 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-11-13 17:47:36,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:47:36,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826507781] [2021-11-13 17:47:36,233 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 17:47:36,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455430844] [2021-11-13 17:47:36,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455430844] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 17:47:36,234 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 17:47:36,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-11-13 17:47:36,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954666437] [2021-11-13 17:47:36,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:47:36,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 17:47:36,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:47:36,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 17:47:36,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-11-13 17:47:36,237 INFO L87 Difference]: Start difference. First operand 153 states and 198 transitions. Second operand has 8 states, 7 states have (on average 8.285714285714286) internal successors, (58), 7 states have internal predecessors, (58), 5 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 4 states have call predecessors, (20), 5 states have call successors, (20) [2021-11-13 17:47:36,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:47:36,809 INFO L93 Difference]: Finished difference Result 226 states and 294 transitions. [2021-11-13 17:47:36,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 17:47:36,810 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 8.285714285714286) internal successors, (58), 7 states have internal predecessors, (58), 5 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 4 states have call predecessors, (20), 5 states have call successors, (20) Word has length 141 [2021-11-13 17:47:36,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:47:36,813 INFO L225 Difference]: With dead ends: 226 [2021-11-13 17:47:36,814 INFO L226 Difference]: Without dead ends: 151 [2021-11-13 17:47:36,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 271 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-11-13 17:47:36,816 INFO L933 BasicCegarLoop]: 147 mSDtfsCounter, 205 mSDsluCounter, 559 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 354.65ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 706 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 17.13ms SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 426.78ms IncrementalHoareTripleChecker+Time [2021-11-13 17:47:36,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 706 Invalid, 251 Unknown, 0 Unchecked, 17.13ms Time], IncrementalHoareTripleChecker [51 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 426.78ms Time] [2021-11-13 17:47:36,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-11-13 17:47:36,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2021-11-13 17:47:36,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 95 states have (on average 1.2105263157894737) internal successors, (115), 96 states have internal predecessors, (115), 40 states have call successors, (40), 15 states have call predecessors, (40), 15 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2021-11-13 17:47:36,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 194 transitions. [2021-11-13 17:47:36,857 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 194 transitions. Word has length 141 [2021-11-13 17:47:36,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:47:36,860 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 194 transitions. [2021-11-13 17:47:36,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 8.285714285714286) internal successors, (58), 7 states have internal predecessors, (58), 5 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 4 states have call predecessors, (20), 5 states have call successors, (20) [2021-11-13 17:47:36,860 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 194 transitions. [2021-11-13 17:47:36,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-13 17:47:36,867 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:47:36,867 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:47:36,919 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a92970c-ae51-425f-bb80-6a31d640db49/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-13 17:47:37,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a92970c-ae51-425f-bb80-6a31d640db49/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:47:37,092 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:47:37,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:47:37,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1499101739, now seen corresponding path program 1 times [2021-11-13 17:47:37,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:47:37,092 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211262936] [2021-11-13 17:47:37,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:47:37,093 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:47:37,263 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-13 17:47:37,263 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1781180875] [2021-11-13 17:47:37,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:47:37,264 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:47:37,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a92970c-ae51-425f-bb80-6a31d640db49/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:47:37,265 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a92970c-ae51-425f-bb80-6a31d640db49/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:47:37,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a92970c-ae51-425f-bb80-6a31d640db49/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-13 17:47:38,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:38,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 2741 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 17:47:38,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:47:38,905 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2021-11-13 17:47:38,905 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 17:47:38,906 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:47:38,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211262936] [2021-11-13 17:47:38,906 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 17:47:38,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781180875] [2021-11-13 17:47:38,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781180875] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:47:38,907 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:47:38,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 17:47:38,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298222843] [2021-11-13 17:47:38,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:47:38,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 17:47:38,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:47:38,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 17:47:38,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 17:47:38,910 INFO L87 Difference]: Start difference. First operand 151 states and 194 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 3 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-13 17:47:38,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:47:38,964 INFO L93 Difference]: Finished difference Result 295 states and 380 transitions. [2021-11-13 17:47:38,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 17:47:38,965 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 3 states have call predecessors, (22), 2 states have call successors, (22) Word has length 142 [2021-11-13 17:47:38,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:47:38,968 INFO L225 Difference]: With dead ends: 295 [2021-11-13 17:47:38,968 INFO L226 Difference]: Without dead ends: 156 [2021-11-13 17:47:38,969 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 17:47:38,971 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 2 mSDsluCounter, 569 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.20ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 760 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.72ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.82ms IncrementalHoareTripleChecker+Time [2021-11-13 17:47:38,971 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 760 Invalid, 15 Unknown, 0 Unchecked, 4.72ms Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 21.82ms Time] [2021-11-13 17:47:38,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-11-13 17:47:38,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2021-11-13 17:47:38,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 99 states have (on average 1.202020202020202) internal successors, (119), 100 states have internal predecessors, (119), 40 states have call successors, (40), 15 states have call predecessors, (40), 16 states have return successors, (40), 40 states have call predecessors, (40), 39 states have call successors, (40) [2021-11-13 17:47:38,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 199 transitions. [2021-11-13 17:47:38,990 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 199 transitions. Word has length 142 [2021-11-13 17:47:38,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:47:38,994 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 199 transitions. [2021-11-13 17:47:38,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 3 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-13 17:47:38,995 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 199 transitions. [2021-11-13 17:47:38,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-13 17:47:38,999 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:47:38,999 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:47:39,034 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a92970c-ae51-425f-bb80-6a31d640db49/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-13 17:47:39,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a92970c-ae51-425f-bb80-6a31d640db49/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-11-13 17:47:39,206 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:47:39,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:47:39,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1151585641, now seen corresponding path program 1 times [2021-11-13 17:47:39,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:47:39,207 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013430649] [2021-11-13 17:47:39,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:47:39,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:47:39,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:39,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 17:47:39,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:39,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-13 17:47:39,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:39,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-13 17:47:39,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:39,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-13 17:47:39,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:39,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-13 17:47:39,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:39,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:47:39,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:39,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:47:39,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:39,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 17:47:39,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:39,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-13 17:47:39,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:39,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-13 17:47:39,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:40,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:47:40,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:40,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-13 17:47:40,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:40,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-13 17:47:40,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:40,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-13 17:47:40,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:40,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-13 17:47:40,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:40,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-11-13 17:47:40,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:40,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-13 17:47:40,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:40,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:47:40,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:40,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:47:40,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:40,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 17:47:40,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:40,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-11-13 17:47:40,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:40,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2021-11-13 17:47:40,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:40,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2021-11-13 17:47:40,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:40,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-11-13 17:47:40,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:40,415 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2021-11-13 17:47:40,415 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:47:40,415 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013430649] [2021-11-13 17:47:40,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013430649] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:47:40,416 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:47:40,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-11-13 17:47:40,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716402557] [2021-11-13 17:47:40,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:47:40,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-13 17:47:40,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:47:40,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-13 17:47:40,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-11-13 17:47:40,419 INFO L87 Difference]: Start difference. First operand 156 states and 199 transitions. Second operand has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 9 states have internal predecessors, (59), 4 states have call successors, (23), 5 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-13 17:47:42,506 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:47:44,694 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.18s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:47:46,885 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.19s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:47:48,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:47:48,869 INFO L93 Difference]: Finished difference Result 304 states and 391 transitions. [2021-11-13 17:47:48,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-13 17:47:48,870 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 9 states have internal predecessors, (59), 4 states have call successors, (23), 5 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 154 [2021-11-13 17:47:48,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:47:48,873 INFO L225 Difference]: With dead ends: 304 [2021-11-13 17:47:48,873 INFO L226 Difference]: Without dead ends: 172 [2021-11-13 17:47:48,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-11-13 17:47:48,875 INFO L933 BasicCegarLoop]: 151 mSDtfsCounter, 199 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 827 mSolverCounterSat, 125 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7419.66ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 707 SdHoareTripleChecker+Invalid, 955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 21.35ms SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 827 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8070.73ms IncrementalHoareTripleChecker+Time [2021-11-13 17:47:48,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 707 Invalid, 955 Unknown, 0 Unchecked, 21.35ms Time], IncrementalHoareTripleChecker [125 Valid, 827 Invalid, 3 Unknown, 0 Unchecked, 8070.73ms Time] [2021-11-13 17:47:48,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-11-13 17:47:48,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 161. [2021-11-13 17:47:48,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 103 states have (on average 1.203883495145631) internal successors, (124), 105 states have internal predecessors, (124), 40 states have call successors, (40), 15 states have call predecessors, (40), 17 states have return successors, (42), 40 states have call predecessors, (42), 39 states have call successors, (42) [2021-11-13 17:47:48,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 206 transitions. [2021-11-13 17:47:48,900 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 206 transitions. Word has length 154 [2021-11-13 17:47:48,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:47:48,900 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 206 transitions. [2021-11-13 17:47:48,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 9 states have internal predecessors, (59), 4 states have call successors, (23), 5 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-13 17:47:48,901 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 206 transitions. [2021-11-13 17:47:48,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-13 17:47:48,904 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:47:48,904 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:47:48,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-13 17:47:48,905 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:47:48,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:47:48,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1922319207, now seen corresponding path program 1 times [2021-11-13 17:47:48,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:47:48,906 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565202976] [2021-11-13 17:47:48,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:47:48,906 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:47:49,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:49,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 17:47:49,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:49,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-13 17:47:49,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:49,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-13 17:47:49,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:49,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-13 17:47:49,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:49,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-13 17:47:49,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:49,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:47:49,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:49,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:47:49,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:49,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 17:47:49,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:49,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-13 17:47:49,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:49,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-13 17:47:49,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:49,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:47:49,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:49,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-13 17:47:49,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:49,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-13 17:47:49,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:49,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-13 17:47:49,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:49,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-13 17:47:49,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:49,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-11-13 17:47:49,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:49,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-13 17:47:49,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:49,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:47:49,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:49,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:47:49,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:49,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 17:47:49,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:49,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-11-13 17:47:49,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:49,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2021-11-13 17:47:49,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:49,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2021-11-13 17:47:49,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:49,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-11-13 17:47:49,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:49,772 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2021-11-13 17:47:49,773 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:47:49,773 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565202976] [2021-11-13 17:47:49,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565202976] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:47:49,773 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:47:49,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-13 17:47:49,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528310661] [2021-11-13 17:47:49,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:47:49,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 17:47:49,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:47:49,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 17:47:49,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:47:49,776 INFO L87 Difference]: Start difference. First operand 161 states and 206 transitions. Second operand has 8 states, 8 states have (on average 7.375) internal successors, (59), 5 states have internal predecessors, (59), 3 states have call successors, (23), 5 states have call predecessors, (23), 2 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2021-11-13 17:47:51,854 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:47:54,003 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.15s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:47:55,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:47:55,121 INFO L93 Difference]: Finished difference Result 311 states and 401 transitions. [2021-11-13 17:47:55,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 17:47:55,122 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 5 states have internal predecessors, (59), 3 states have call successors, (23), 5 states have call predecessors, (23), 2 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) Word has length 154 [2021-11-13 17:47:55,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:47:55,128 INFO L225 Difference]: With dead ends: 311 [2021-11-13 17:47:55,129 INFO L226 Difference]: Without dead ends: 174 [2021-11-13 17:47:55,130 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-13 17:47:55,134 INFO L933 BasicCegarLoop]: 163 mSDtfsCounter, 231 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 156 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4816.24ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.37ms SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5226.93ms IncrementalHoareTripleChecker+Time [2021-11-13 17:47:55,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 525 Invalid, 550 Unknown, 0 Unchecked, 13.37ms Time], IncrementalHoareTripleChecker [156 Valid, 392 Invalid, 2 Unknown, 0 Unchecked, 5226.93ms Time] [2021-11-13 17:47:55,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-11-13 17:47:55,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 166. [2021-11-13 17:47:55,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 106 states have (on average 1.1981132075471699) internal successors, (127), 109 states have internal predecessors, (127), 41 states have call successors, (41), 15 states have call predecessors, (41), 18 states have return successors, (44), 41 states have call predecessors, (44), 40 states have call successors, (44) [2021-11-13 17:47:55,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 212 transitions. [2021-11-13 17:47:55,160 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 212 transitions. Word has length 154 [2021-11-13 17:47:55,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:47:55,161 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 212 transitions. [2021-11-13 17:47:55,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 5 states have internal predecessors, (59), 3 states have call successors, (23), 5 states have call predecessors, (23), 2 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2021-11-13 17:47:55,161 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 212 transitions. [2021-11-13 17:47:55,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-11-13 17:47:55,164 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:47:55,165 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:47:55,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-13 17:47:55,165 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:47:55,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:47:55,166 INFO L85 PathProgramCache]: Analyzing trace with hash 519277663, now seen corresponding path program 1 times [2021-11-13 17:47:55,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:47:55,167 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11443659] [2021-11-13 17:47:55,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:47:55,167 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:47:55,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:55,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 17:47:55,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:55,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-13 17:47:55,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:55,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-13 17:47:55,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:55,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-13 17:47:55,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:55,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-13 17:47:55,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:55,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:47:55,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:55,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:47:55,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:55,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 17:47:55,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:55,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-13 17:47:55,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:55,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-13 17:47:55,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:55,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:47:55,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:55,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-13 17:47:55,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:55,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 17:47:55,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:55,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-13 17:47:55,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:55,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-13 17:47:55,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:55,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-11-13 17:47:55,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:55,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-13 17:47:55,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:55,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-11-13 17:47:55,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:55,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:47:55,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:55,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:47:55,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:56,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 17:47:56,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:56,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-11-13 17:47:56,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:56,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2021-11-13 17:47:56,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:56,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-11-13 17:47:56,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:56,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2021-11-13 17:47:56,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:56,077 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2021-11-13 17:47:56,077 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:47:56,077 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11443659] [2021-11-13 17:47:56,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11443659] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:47:56,077 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:47:56,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-13 17:47:56,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923076970] [2021-11-13 17:47:56,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:47:56,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-13 17:47:56,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:47:56,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-13 17:47:56,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-13 17:47:56,082 INFO L87 Difference]: Start difference. First operand 166 states and 212 transitions. Second operand has 10 states, 9 states have (on average 7.0) internal successors, (63), 7 states have internal predecessors, (63), 3 states have call successors, (24), 5 states have call predecessors, (24), 3 states have return successors, (22), 2 states have call predecessors, (22), 3 states have call successors, (22) [2021-11-13 17:47:58,158 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:48:00,303 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:48:02,465 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.16s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:48:04,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:48:04,058 INFO L93 Difference]: Finished difference Result 319 states and 418 transitions. [2021-11-13 17:48:04,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-13 17:48:04,059 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 7.0) internal successors, (63), 7 states have internal predecessors, (63), 3 states have call successors, (24), 5 states have call predecessors, (24), 3 states have return successors, (22), 2 states have call predecessors, (22), 3 states have call successors, (22) Word has length 160 [2021-11-13 17:48:04,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:48:04,061 INFO L225 Difference]: With dead ends: 319 [2021-11-13 17:48:04,062 INFO L226 Difference]: Without dead ends: 175 [2021-11-13 17:48:04,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-11-13 17:48:04,064 INFO L933 BasicCegarLoop]: 159 mSDtfsCounter, 158 mSDsluCounter, 568 mSDsCounter, 0 mSdLazyCounter, 606 mSolverCounterSat, 108 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7063.56ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 727 SdHoareTripleChecker+Invalid, 717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.11ms SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 606 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7676.11ms IncrementalHoareTripleChecker+Time [2021-11-13 17:48:04,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 727 Invalid, 717 Unknown, 0 Unchecked, 15.11ms Time], IncrementalHoareTripleChecker [108 Valid, 606 Invalid, 3 Unknown, 0 Unchecked, 7676.11ms Time] [2021-11-13 17:48:04,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-11-13 17:48:04,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 166. [2021-11-13 17:48:04,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 106 states have (on average 1.1886792452830188) internal successors, (126), 109 states have internal predecessors, (126), 41 states have call successors, (41), 15 states have call predecessors, (41), 18 states have return successors, (44), 41 states have call predecessors, (44), 40 states have call successors, (44) [2021-11-13 17:48:04,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 211 transitions. [2021-11-13 17:48:04,102 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 211 transitions. Word has length 160 [2021-11-13 17:48:04,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:48:04,103 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 211 transitions. [2021-11-13 17:48:04,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 7.0) internal successors, (63), 7 states have internal predecessors, (63), 3 states have call successors, (24), 5 states have call predecessors, (24), 3 states have return successors, (22), 2 states have call predecessors, (22), 3 states have call successors, (22) [2021-11-13 17:48:04,104 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 211 transitions. [2021-11-13 17:48:04,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-11-13 17:48:04,108 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:48:04,109 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:48:04,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-13 17:48:04,109 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:48:04,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:48:04,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1794962801, now seen corresponding path program 1 times [2021-11-13 17:48:04,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:48:04,110 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987014100] [2021-11-13 17:48:04,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:48:04,111 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:48:04,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:04,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 17:48:04,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:04,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-13 17:48:04,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:04,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-13 17:48:04,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:04,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-13 17:48:04,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:04,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-13 17:48:04,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:05,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:48:05,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:05,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:48:05,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:05,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 17:48:05,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:05,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-13 17:48:05,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:05,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-13 17:48:05,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:05,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:48:05,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:05,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-13 17:48:05,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:05,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 17:48:05,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:05,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 17:48:05,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:05,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-11-13 17:48:05,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:05,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-11-13 17:48:05,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:05,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-11-13 17:48:05,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:05,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-11-13 17:48:05,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:05,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-11-13 17:48:05,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:05,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:48:05,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:05,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:48:05,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:05,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 17:48:05,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:05,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2021-11-13 17:48:05,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:05,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-11-13 17:48:05,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:05,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2021-11-13 17:48:05,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:05,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2021-11-13 17:48:05,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:05,662 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 205 trivial. 0 not checked. [2021-11-13 17:48:05,662 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:48:05,662 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987014100] [2021-11-13 17:48:05,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987014100] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:48:05,663 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743419842] [2021-11-13 17:48:05,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:48:05,663 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:48:05,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a92970c-ae51-425f-bb80-6a31d640db49/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:48:05,666 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a92970c-ae51-425f-bb80-6a31d640db49/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:48:05,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a92970c-ae51-425f-bb80-6a31d640db49/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-13 17:48:06,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:06,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 2827 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-13 17:48:06,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:48:07,425 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2021-11-13 17:48:07,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:48:08,081 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2021-11-13 17:48:08,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743419842] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 17:48:08,081 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-13 17:48:08,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [13, 8] total 21 [2021-11-13 17:48:08,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445595876] [2021-11-13 17:48:08,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:48:08,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 17:48:08,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:48:08,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 17:48:08,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=376, Unknown=0, NotChecked=0, Total=420 [2021-11-13 17:48:08,090 INFO L87 Difference]: Start difference. First operand 166 states and 211 transitions. Second operand has 5 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (23), 1 states have call predecessors, (23), 1 states have call successors, (23) [2021-11-13 17:48:08,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:48:08,194 INFO L93 Difference]: Finished difference Result 174 states and 219 transitions. [2021-11-13 17:48:08,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 17:48:08,195 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (23), 1 states have call predecessors, (23), 1 states have call successors, (23) Word has length 165 [2021-11-13 17:48:08,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:48:08,197 INFO L225 Difference]: With dead ends: 174 [2021-11-13 17:48:08,198 INFO L226 Difference]: Without dead ends: 172 [2021-11-13 17:48:08,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 369 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=48, Invalid=414, Unknown=0, NotChecked=0, Total=462 [2021-11-13 17:48:08,199 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 6 mSDsluCounter, 560 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34.54ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 751 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.10ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 41.11ms IncrementalHoareTripleChecker+Time [2021-11-13 17:48:08,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 751 Invalid, 22 Unknown, 0 Unchecked, 3.10ms Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 41.11ms Time] [2021-11-13 17:48:08,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-11-13 17:48:08,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 171. [2021-11-13 17:48:08,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 109 states have (on average 1.18348623853211) internal successors, (129), 113 states have internal predecessors, (129), 42 states have call successors, (42), 16 states have call predecessors, (42), 19 states have return successors, (45), 41 states have call predecessors, (45), 41 states have call successors, (45) [2021-11-13 17:48:08,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 216 transitions. [2021-11-13 17:48:08,232 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 216 transitions. Word has length 165 [2021-11-13 17:48:08,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:48:08,234 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 216 transitions. [2021-11-13 17:48:08,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (23), 1 states have call predecessors, (23), 1 states have call successors, (23) [2021-11-13 17:48:08,235 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 216 transitions. [2021-11-13 17:48:08,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-11-13 17:48:08,239 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:48:08,239 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:48:08,279 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a92970c-ae51-425f-bb80-6a31d640db49/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-13 17:48:08,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a92970c-ae51-425f-bb80-6a31d640db49/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:48:08,452 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:48:08,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:48:08,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1793115759, now seen corresponding path program 1 times [2021-11-13 17:48:08,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:48:08,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528911226] [2021-11-13 17:48:08,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:48:08,453 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:48:08,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:08,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 17:48:08,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:08,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-13 17:48:08,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:08,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-13 17:48:08,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:08,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-13 17:48:08,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:08,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-13 17:48:08,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:08,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:48:08,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:09,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:48:09,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:09,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 17:48:09,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:09,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-13 17:48:09,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:09,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-13 17:48:09,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:09,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:48:09,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:09,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-13 17:48:09,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:09,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 17:48:09,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:09,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 17:48:09,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:09,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-11-13 17:48:09,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:09,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-11-13 17:48:09,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:09,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-11-13 17:48:09,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:09,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-11-13 17:48:09,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:09,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-11-13 17:48:09,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:09,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:48:09,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:09,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:48:09,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:09,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 17:48:09,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:09,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2021-11-13 17:48:09,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:09,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-11-13 17:48:09,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:09,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2021-11-13 17:48:09,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:09,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2021-11-13 17:48:09,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:09,399 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2021-11-13 17:48:09,399 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:48:09,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528911226] [2021-11-13 17:48:09,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528911226] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:48:09,400 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:48:09,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-13 17:48:09,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796046665] [2021-11-13 17:48:09,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:48:09,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 17:48:09,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:48:09,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 17:48:09,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:48:09,402 INFO L87 Difference]: Start difference. First operand 171 states and 216 transitions. Second operand has 8 states, 8 states have (on average 8.0) internal successors, (64), 5 states have internal predecessors, (64), 3 states have call successors, (25), 5 states have call predecessors, (25), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-13 17:48:11,470 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:48:13,667 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.20s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:48:14,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:48:14,871 INFO L93 Difference]: Finished difference Result 263 states and 339 transitions. [2021-11-13 17:48:14,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 17:48:14,871 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 5 states have internal predecessors, (64), 3 states have call successors, (25), 5 states have call predecessors, (25), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 165 [2021-11-13 17:48:14,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:48:14,874 INFO L225 Difference]: With dead ends: 263 [2021-11-13 17:48:14,874 INFO L226 Difference]: Without dead ends: 192 [2021-11-13 17:48:14,876 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-11-13 17:48:14,877 INFO L933 BasicCegarLoop]: 163 mSDtfsCounter, 94 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 77 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4868.33ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.91ms SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5284.63ms IncrementalHoareTripleChecker+Time [2021-11-13 17:48:14,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 455 Invalid, 477 Unknown, 0 Unchecked, 9.91ms Time], IncrementalHoareTripleChecker [77 Valid, 398 Invalid, 2 Unknown, 0 Unchecked, 5284.63ms Time] [2021-11-13 17:48:14,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-11-13 17:48:14,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 174. [2021-11-13 17:48:14,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 111 states have (on average 1.1801801801801801) internal successors, (131), 115 states have internal predecessors, (131), 43 states have call successors, (43), 16 states have call predecessors, (43), 19 states have return successors, (46), 42 states have call predecessors, (46), 42 states have call successors, (46) [2021-11-13 17:48:14,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 220 transitions. [2021-11-13 17:48:14,899 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 220 transitions. Word has length 165 [2021-11-13 17:48:14,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:48:14,900 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 220 transitions. [2021-11-13 17:48:14,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 5 states have internal predecessors, (64), 3 states have call successors, (25), 5 states have call predecessors, (25), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-13 17:48:14,901 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 220 transitions. [2021-11-13 17:48:14,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-11-13 17:48:14,904 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:48:14,904 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:48:14,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-13 17:48:14,905 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:48:14,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:48:14,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1534950321, now seen corresponding path program 1 times [2021-11-13 17:48:14,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:48:14,906 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839803992] [2021-11-13 17:48:14,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:48:14,907 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:48:15,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:15,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 17:48:15,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:15,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-13 17:48:15,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:15,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-13 17:48:15,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:15,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-13 17:48:15,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:15,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-13 17:48:15,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:15,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:48:15,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:15,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:48:15,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:15,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 17:48:15,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:15,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-13 17:48:15,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:15,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-13 17:48:15,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:15,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:48:15,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:15,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-13 17:48:15,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:15,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 17:48:15,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:15,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 17:48:15,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:15,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-11-13 17:48:15,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:15,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-11-13 17:48:15,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:15,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-11-13 17:48:15,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:16,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-11-13 17:48:16,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:16,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-11-13 17:48:16,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:16,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:48:16,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:16,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:48:16,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:16,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 17:48:16,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:16,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2021-11-13 17:48:16,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:16,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-11-13 17:48:16,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:16,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2021-11-13 17:48:16,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:16,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2021-11-13 17:48:16,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:16,178 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 205 trivial. 0 not checked. [2021-11-13 17:48:16,178 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:48:16,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839803992] [2021-11-13 17:48:16,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839803992] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:48:16,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301802698] [2021-11-13 17:48:16,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:48:16,179 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:48:16,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a92970c-ae51-425f-bb80-6a31d640db49/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:48:16,182 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a92970c-ae51-425f-bb80-6a31d640db49/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:48:16,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a92970c-ae51-425f-bb80-6a31d640db49/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-13 17:48:17,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:17,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 2833 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-13 17:48:17,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:48:17,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 16 treesize of output 12 [2021-11-13 17:48:18,389 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 142 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-11-13 17:48:18,389 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 17:48:18,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301802698] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:48:18,389 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 17:48:18,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [13] total 18 [2021-11-13 17:48:18,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545675132] [2021-11-13 17:48:18,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:48:18,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 17:48:18,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:48:18,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 17:48:18,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-11-13 17:48:18,392 INFO L87 Difference]: Start difference. First operand 174 states and 220 transitions. Second operand has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 4 states have call successors, (28), 3 states have call predecessors, (28), 4 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-13 17:48:18,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:48:18,470 INFO L93 Difference]: Finished difference Result 327 states and 408 transitions. [2021-11-13 17:48:18,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 17:48:18,471 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 4 states have call successors, (28), 3 states have call predecessors, (28), 4 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) Word has length 165 [2021-11-13 17:48:18,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:48:18,474 INFO L225 Difference]: With dead ends: 327 [2021-11-13 17:48:18,474 INFO L226 Difference]: Without dead ends: 181 [2021-11-13 17:48:18,476 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 207 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-11-13 17:48:18,477 INFO L933 BasicCegarLoop]: 190 mSDtfsCounter, 9 mSDsluCounter, 527 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.59ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 717 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.81ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 23.92ms IncrementalHoareTripleChecker+Time [2021-11-13 17:48:18,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 717 Invalid, 55 Unknown, 0 Unchecked, 2.81ms Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 49 Unchecked, 23.92ms Time] [2021-11-13 17:48:18,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-11-13 17:48:18,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2021-11-13 17:48:18,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 117 states have (on average 1.170940170940171) internal successors, (137), 120 states have internal predecessors, (137), 43 states have call successors, (43), 18 states have call predecessors, (43), 20 states have return successors, (46), 42 states have call predecessors, (46), 42 states have call successors, (46) [2021-11-13 17:48:18,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 226 transitions. [2021-11-13 17:48:18,498 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 226 transitions. Word has length 165 [2021-11-13 17:48:18,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:48:18,499 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 226 transitions. [2021-11-13 17:48:18,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 4 states have call successors, (28), 3 states have call predecessors, (28), 4 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-13 17:48:18,500 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 226 transitions. [2021-11-13 17:48:18,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-11-13 17:48:18,503 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:48:18,503 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:48:18,556 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a92970c-ae51-425f-bb80-6a31d640db49/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-13 17:48:18,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a92970c-ae51-425f-bb80-6a31d640db49/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-13 17:48:18,726 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:48:18,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:48:18,726 INFO L85 PathProgramCache]: Analyzing trace with hash -1255266176, now seen corresponding path program 1 times [2021-11-13 17:48:18,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:48:18,726 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420714241] [2021-11-13 17:48:18,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:48:18,727 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:48:18,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:19,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 17:48:19,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:19,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-13 17:48:19,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:19,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-13 17:48:19,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:19,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-13 17:48:19,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:19,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-13 17:48:19,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:19,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:48:19,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:19,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:48:19,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:19,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 17:48:19,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:19,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-13 17:48:19,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:19,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-13 17:48:19,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:19,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:48:19,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:19,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-13 17:48:19,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:19,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 17:48:19,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:19,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 17:48:19,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:19,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-11-13 17:48:19,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:19,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-11-13 17:48:19,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:19,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-11-13 17:48:19,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:19,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 17:48:19,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:19,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-11-13 17:48:19,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:19,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-11-13 17:48:19,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:19,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:48:19,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:19,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:48:19,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:19,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 17:48:19,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:20,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-11-13 17:48:20,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:20,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2021-11-13 17:48:20,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:20,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2021-11-13 17:48:20,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:20,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2021-11-13 17:48:20,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:20,182 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2021-11-13 17:48:20,182 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:48:20,183 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420714241] [2021-11-13 17:48:20,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420714241] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:48:20,183 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711575439] [2021-11-13 17:48:20,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:48:20,184 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:48:20,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a92970c-ae51-425f-bb80-6a31d640db49/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:48:20,202 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a92970c-ae51-425f-bb80-6a31d640db49/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:48:20,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a92970c-ae51-425f-bb80-6a31d640db49/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-13 17:48:21,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:21,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 2860 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-13 17:48:21,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:48:22,096 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 131 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-11-13 17:48:22,096 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 17:48:22,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711575439] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:48:22,097 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 17:48:22,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [16] total 23 [2021-11-13 17:48:22,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629055180] [2021-11-13 17:48:22,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:48:22,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-13 17:48:22,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:48:22,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-13 17:48:22,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=459, Unknown=0, NotChecked=0, Total=506 [2021-11-13 17:48:22,099 INFO L87 Difference]: Start difference. First operand 181 states and 226 transitions. Second operand has 9 states, 8 states have (on average 11.5) internal successors, (92), 7 states have internal predecessors, (92), 3 states have call successors, (29), 2 states have call predecessors, (29), 5 states have return successors, (27), 4 states have call predecessors, (27), 3 states have call successors, (27) [2021-11-13 17:48:22,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:48:22,439 INFO L93 Difference]: Finished difference Result 332 states and 422 transitions. [2021-11-13 17:48:22,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 17:48:22,440 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 11.5) internal successors, (92), 7 states have internal predecessors, (92), 3 states have call successors, (29), 2 states have call predecessors, (29), 5 states have return successors, (27), 4 states have call predecessors, (27), 3 states have call successors, (27) Word has length 174 [2021-11-13 17:48:22,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:48:22,450 INFO L225 Difference]: With dead ends: 332 [2021-11-13 17:48:22,450 INFO L226 Difference]: Without dead ends: 187 [2021-11-13 17:48:22,452 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=51, Invalid=501, Unknown=0, NotChecked=0, Total=552 [2021-11-13 17:48:22,453 INFO L933 BasicCegarLoop]: 179 mSDtfsCounter, 2 mSDsluCounter, 1214 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 224.94ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1393 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.49ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 260.28ms IncrementalHoareTripleChecker+Time [2021-11-13 17:48:22,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1393 Invalid, 146 Unknown, 0 Unchecked, 5.49ms Time], IncrementalHoareTripleChecker [5 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 260.28ms Time] [2021-11-13 17:48:22,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-11-13 17:48:22,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2021-11-13 17:48:22,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 121 states have (on average 1.165289256198347) internal successors, (141), 125 states have internal predecessors, (141), 43 states have call successors, (43), 18 states have call predecessors, (43), 22 states have return successors, (50), 43 states have call predecessors, (50), 42 states have call successors, (50) [2021-11-13 17:48:22,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 234 transitions. [2021-11-13 17:48:22,484 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 234 transitions. Word has length 174 [2021-11-13 17:48:22,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:48:22,485 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 234 transitions. [2021-11-13 17:48:22,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 11.5) internal successors, (92), 7 states have internal predecessors, (92), 3 states have call successors, (29), 2 states have call predecessors, (29), 5 states have return successors, (27), 4 states have call predecessors, (27), 3 states have call successors, (27) [2021-11-13 17:48:22,485 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 234 transitions. [2021-11-13 17:48:22,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-11-13 17:48:22,489 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:48:22,489 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:48:22,539 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a92970c-ae51-425f-bb80-6a31d640db49/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-13 17:48:22,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a92970c-ae51-425f-bb80-6a31d640db49/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-13 17:48:22,706 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:48:22,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:48:22,706 INFO L85 PathProgramCache]: Analyzing trace with hash 841255778, now seen corresponding path program 1 times [2021-11-13 17:48:22,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:48:22,707 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578923026] [2021-11-13 17:48:22,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:48:22,707 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:48:22,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:23,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 17:48:23,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:23,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-13 17:48:23,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:23,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-13 17:48:23,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:23,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-13 17:48:23,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:23,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-13 17:48:23,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:23,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:48:23,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:23,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:48:23,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:23,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 17:48:23,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:23,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-13 17:48:23,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:23,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-13 17:48:23,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:23,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:48:23,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:23,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-13 17:48:23,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:23,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 17:48:23,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:23,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 17:48:23,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:23,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-11-13 17:48:23,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:23,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-11-13 17:48:23,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:23,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-11-13 17:48:23,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:23,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 17:48:23,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:23,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 17:48:23,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:23,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 17:48:23,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:23,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-11-13 17:48:24,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:24,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2021-11-13 17:48:24,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:24,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:48:24,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:24,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:48:24,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:24,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 17:48:24,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:24,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2021-11-13 17:48:24,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:24,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2021-11-13 17:48:24,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:24,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2021-11-13 17:48:24,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:24,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2021-11-13 17:48:24,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:24,316 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2021-11-13 17:48:24,317 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:48:24,317 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578923026] [2021-11-13 17:48:24,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578923026] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:48:24,318 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359485228] [2021-11-13 17:48:24,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:48:24,318 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:48:24,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a92970c-ae51-425f-bb80-6a31d640db49/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:48:24,322 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a92970c-ae51-425f-bb80-6a31d640db49/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:48:24,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a92970c-ae51-425f-bb80-6a31d640db49/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-13 17:48:25,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:25,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 2930 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-13 17:48:25,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:48:25,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 16 treesize of output 12 [2021-11-13 17:48:27,520 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 162 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-11-13 17:48:27,520 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 17:48:27,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359485228] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:48:27,521 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 17:48:27,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [16] total 23 [2021-11-13 17:48:27,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329175172] [2021-11-13 17:48:27,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:48:27,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-13 17:48:27,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:48:27,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-13 17:48:27,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-11-13 17:48:27,524 INFO L87 Difference]: Start difference. First operand 187 states and 234 transitions. Second operand has 11 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 7 states have call successors, (31), 5 states have call predecessors, (31), 5 states have return successors, (29), 6 states have call predecessors, (29), 7 states have call successors, (29) [2021-11-13 17:48:29,596 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:48:31,780 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.18s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:48:32,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:48:32,980 INFO L93 Difference]: Finished difference Result 414 states and 526 transitions. [2021-11-13 17:48:32,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-13 17:48:32,982 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 7 states have call successors, (31), 5 states have call predecessors, (31), 5 states have return successors, (29), 6 states have call predecessors, (29), 7 states have call successors, (29) Word has length 187 [2021-11-13 17:48:32,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:48:32,985 INFO L225 Difference]: With dead ends: 414 [2021-11-13 17:48:32,986 INFO L226 Difference]: Without dead ends: 307 [2021-11-13 17:48:32,987 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 230 SyntacticMatches, 8 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2021-11-13 17:48:32,988 INFO L933 BasicCegarLoop]: 219 mSDtfsCounter, 101 mSDsluCounter, 684 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 62 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4767.98ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 903 SdHoareTripleChecker+Invalid, 981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.91ms SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 579 IncrementalHoareTripleChecker+Unchecked, 5211.40ms IncrementalHoareTripleChecker+Time [2021-11-13 17:48:32,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 903 Invalid, 981 Unknown, 0 Unchecked, 12.91ms Time], IncrementalHoareTripleChecker [62 Valid, 338 Invalid, 2 Unknown, 579 Unchecked, 5211.40ms Time] [2021-11-13 17:48:32,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-11-13 17:48:33,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 280. [2021-11-13 17:48:33,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 183 states have (on average 1.180327868852459) internal successors, (216), 192 states have internal predecessors, (216), 61 states have call successors, (61), 26 states have call predecessors, (61), 35 states have return successors, (79), 61 states have call predecessors, (79), 60 states have call successors, (79) [2021-11-13 17:48:33,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 356 transitions. [2021-11-13 17:48:33,037 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 356 transitions. Word has length 187 [2021-11-13 17:48:33,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:48:33,037 INFO L470 AbstractCegarLoop]: Abstraction has 280 states and 356 transitions. [2021-11-13 17:48:33,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 7 states have call successors, (31), 5 states have call predecessors, (31), 5 states have return successors, (29), 6 states have call predecessors, (29), 7 states have call successors, (29) [2021-11-13 17:48:33,038 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 356 transitions. [2021-11-13 17:48:33,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-11-13 17:48:33,042 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:48:33,042 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:48:33,098 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a92970c-ae51-425f-bb80-6a31d640db49/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-13 17:48:33,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a92970c-ae51-425f-bb80-6a31d640db49/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:48:33,266 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:48:33,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:48:33,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1454365672, now seen corresponding path program 1 times [2021-11-13 17:48:33,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:48:33,267 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496710593] [2021-11-13 17:48:33,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:48:33,267 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:48:33,489 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-13 17:48:33,489 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [549098512] [2021-11-13 17:48:33,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:48:33,490 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:48:33,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a92970c-ae51-425f-bb80-6a31d640db49/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:48:33,491 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a92970c-ae51-425f-bb80-6a31d640db49/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:48:33,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a92970c-ae51-425f-bb80-6a31d640db49/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-13 17:48:34,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:34,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 3008 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 17:48:34,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:48:34,994 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-11-13 17:48:34,995 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 17:48:34,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:48:34,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496710593] [2021-11-13 17:48:34,995 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 17:48:34,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549098512] [2021-11-13 17:48:34,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549098512] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:48:34,996 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:48:34,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 17:48:34,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602878656] [2021-11-13 17:48:34,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:48:34,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 17:48:34,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:48:34,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 17:48:34,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 17:48:34,998 INFO L87 Difference]: Start difference. First operand 280 states and 356 transitions. Second operand has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 2 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 3 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-13 17:48:35,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:48:35,065 INFO L93 Difference]: Finished difference Result 550 states and 701 transitions. [2021-11-13 17:48:35,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 17:48:35,066 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 2 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 3 states have call predecessors, (26), 2 states have call successors, (26) Word has length 193 [2021-11-13 17:48:35,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:48:35,070 INFO L225 Difference]: With dead ends: 550 [2021-11-13 17:48:35,070 INFO L226 Difference]: Without dead ends: 282 [2021-11-13 17:48:35,072 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 17:48:35,073 INFO L933 BasicCegarLoop]: 190 mSDtfsCounter, 2 mSDsluCounter, 566 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.48ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 756 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.18ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.35ms IncrementalHoareTripleChecker+Time [2021-11-13 17:48:35,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 756 Invalid, 15 Unknown, 0 Unchecked, 2.18ms Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 25.35ms Time] [2021-11-13 17:48:35,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-11-13 17:48:35,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 282. [2021-11-13 17:48:35,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 185 states have (on average 1.1783783783783783) internal successors, (218), 193 states have internal predecessors, (218), 61 states have call successors, (61), 26 states have call predecessors, (61), 35 states have return successors, (79), 62 states have call predecessors, (79), 60 states have call successors, (79) [2021-11-13 17:48:35,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 358 transitions. [2021-11-13 17:48:35,102 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 358 transitions. Word has length 193 [2021-11-13 17:48:35,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:48:35,102 INFO L470 AbstractCegarLoop]: Abstraction has 282 states and 358 transitions. [2021-11-13 17:48:35,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 2 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 3 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-13 17:48:35,103 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 358 transitions. [2021-11-13 17:48:35,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2021-11-13 17:48:35,107 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:48:35,107 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:48:35,162 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a92970c-ae51-425f-bb80-6a31d640db49/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-13 17:48:35,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a92970c-ae51-425f-bb80-6a31d640db49/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-13 17:48:35,334 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:48:35,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:48:35,334 INFO L85 PathProgramCache]: Analyzing trace with hash -790312705, now seen corresponding path program 1 times [2021-11-13 17:48:35,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:48:35,335 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832300745] [2021-11-13 17:48:35,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:48:35,335 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:48:35,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:35,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 17:48:35,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:35,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-13 17:48:35,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:35,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-13 17:48:35,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:35,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-13 17:48:35,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:35,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-13 17:48:35,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:36,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:48:36,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:36,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:48:36,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:36,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 17:48:36,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:36,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-13 17:48:36,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:36,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-13 17:48:36,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:36,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:48:36,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:36,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-13 17:48:36,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:36,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 17:48:36,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:36,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 17:48:36,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:36,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-11-13 17:48:36,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:36,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-11-13 17:48:36,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:36,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-11-13 17:48:36,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:36,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 17:48:36,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:36,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 17:48:36,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:36,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 17:48:36,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:36,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-11-13 17:48:36,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:36,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2021-11-13 17:48:36,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:36,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:48:36,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:36,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:48:36,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:36,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 17:48:36,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:36,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-13 17:48:36,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:36,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:48:36,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:36,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-11-13 17:48:36,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:36,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-11-13 17:48:36,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:36,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2021-11-13 17:48:36,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:36,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2021-11-13 17:48:36,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:36,549 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2021-11-13 17:48:36,549 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:48:36,550 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832300745] [2021-11-13 17:48:36,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832300745] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:48:36,550 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:48:36,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-13 17:48:36,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64124922] [2021-11-13 17:48:36,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:48:36,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-13 17:48:36,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:48:36,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-13 17:48:36,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-13 17:48:36,553 INFO L87 Difference]: Start difference. First operand 282 states and 358 transitions. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 6 states have internal predecessors, (84), 2 states have call successors, (28), 5 states have call predecessors, (28), 4 states have return successors, (28), 4 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-13 17:48:38,676 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:48:40,876 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.20s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:48:43,064 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.19s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:48:44,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:48:44,435 INFO L93 Difference]: Finished difference Result 551 states and 703 transitions. [2021-11-13 17:48:44,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-13 17:48:44,437 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 6 states have internal predecessors, (84), 2 states have call successors, (28), 5 states have call predecessors, (28), 4 states have return successors, (28), 4 states have call predecessors, (28), 2 states have call successors, (28) Word has length 199 [2021-11-13 17:48:44,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:48:44,440 INFO L225 Difference]: With dead ends: 551 [2021-11-13 17:48:44,440 INFO L226 Difference]: Without dead ends: 281 [2021-11-13 17:48:44,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-11-13 17:48:44,443 INFO L933 BasicCegarLoop]: 159 mSDtfsCounter, 82 mSDsluCounter, 649 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 51 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7108.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 808 SdHoareTripleChecker+Invalid, 675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.06ms SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7789.89ms IncrementalHoareTripleChecker+Time [2021-11-13 17:48:44,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 808 Invalid, 675 Unknown, 0 Unchecked, 11.06ms Time], IncrementalHoareTripleChecker [51 Valid, 621 Invalid, 3 Unknown, 0 Unchecked, 7789.89ms Time] [2021-11-13 17:48:44,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-11-13 17:48:44,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 279. [2021-11-13 17:48:44,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 183 states have (on average 1.169398907103825) internal successors, (214), 191 states have internal predecessors, (214), 60 states have call successors, (60), 26 states have call predecessors, (60), 35 states have return successors, (77), 61 states have call predecessors, (77), 59 states have call successors, (77) [2021-11-13 17:48:44,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 351 transitions. [2021-11-13 17:48:44,471 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 351 transitions. Word has length 199 [2021-11-13 17:48:44,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:48:44,472 INFO L470 AbstractCegarLoop]: Abstraction has 279 states and 351 transitions. [2021-11-13 17:48:44,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 6 states have internal predecessors, (84), 2 states have call successors, (28), 5 states have call predecessors, (28), 4 states have return successors, (28), 4 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-13 17:48:44,473 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 351 transitions. [2021-11-13 17:48:44,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-11-13 17:48:44,475 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:48:44,475 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:48:44,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-13 17:48:44,476 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:48:44,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:48:44,477 INFO L85 PathProgramCache]: Analyzing trace with hash 531682089, now seen corresponding path program 1 times [2021-11-13 17:48:44,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:48:44,477 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389053840] [2021-11-13 17:48:44,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:48:44,478 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:48:44,615 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-13 17:48:44,615 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1868627778] [2021-11-13 17:48:44,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:48:44,615 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:48:44,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a92970c-ae51-425f-bb80-6a31d640db49/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:48:44,618 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a92970c-ae51-425f-bb80-6a31d640db49/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:48:44,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a92970c-ae51-425f-bb80-6a31d640db49/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-13 17:48:45,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:45,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 3009 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-13 17:48:45,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:48:46,179 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 74 proven. 6 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-11-13 17:48:46,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:48:46,929 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 26 proven. 3 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2021-11-13 17:48:46,930 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:48:46,930 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389053840] [2021-11-13 17:48:46,930 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 17:48:46,930 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868627778] [2021-11-13 17:48:46,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868627778] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 17:48:46,930 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 17:48:46,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2021-11-13 17:48:46,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515526749] [2021-11-13 17:48:46,931 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 17:48:46,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-13 17:48:46,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:48:46,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-13 17:48:46,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-11-13 17:48:46,934 INFO L87 Difference]: Start difference. First operand 279 states and 351 transitions. Second operand has 12 states, 9 states have (on average 10.222222222222221) internal successors, (92), 9 states have internal predecessors, (92), 5 states have call successors, (32), 3 states have call predecessors, (32), 5 states have return successors, (30), 4 states have call predecessors, (30), 5 states have call successors, (30) [2021-11-13 17:48:47,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:48:47,322 INFO L93 Difference]: Finished difference Result 390 states and 490 transitions. [2021-11-13 17:48:47,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 17:48:47,323 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 10.222222222222221) internal successors, (92), 9 states have internal predecessors, (92), 5 states have call successors, (32), 3 states have call predecessors, (32), 5 states have return successors, (30), 4 states have call predecessors, (30), 5 states have call successors, (30) Word has length 193 [2021-11-13 17:48:47,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:48:47,327 INFO L225 Difference]: With dead ends: 390 [2021-11-13 17:48:47,327 INFO L226 Difference]: Without dead ends: 277 [2021-11-13 17:48:47,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 374 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-13 17:48:47,329 INFO L933 BasicCegarLoop]: 181 mSDtfsCounter, 6 mSDsluCounter, 1221 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 257.82ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 1402 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.77ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 327.27ms IncrementalHoareTripleChecker+Time [2021-11-13 17:48:47,330 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 1402 Invalid, 157 Unknown, 0 Unchecked, 4.77ms Time], IncrementalHoareTripleChecker [7 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 327.27ms Time] [2021-11-13 17:48:47,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-11-13 17:48:47,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 274. [2021-11-13 17:48:47,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 179 states have (on average 1.1508379888268156) internal successors, (206), 187 states have internal predecessors, (206), 60 states have call successors, (60), 26 states have call predecessors, (60), 34 states have return successors, (78), 60 states have call predecessors, (78), 59 states have call successors, (78) [2021-11-13 17:48:47,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 344 transitions. [2021-11-13 17:48:47,358 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 344 transitions. Word has length 193 [2021-11-13 17:48:47,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:48:47,359 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 344 transitions. [2021-11-13 17:48:47,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 10.222222222222221) internal successors, (92), 9 states have internal predecessors, (92), 5 states have call successors, (32), 3 states have call predecessors, (32), 5 states have return successors, (30), 4 states have call predecessors, (30), 5 states have call successors, (30) [2021-11-13 17:48:47,360 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 344 transitions. [2021-11-13 17:48:47,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2021-11-13 17:48:47,362 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:48:47,363 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:48:47,414 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a92970c-ae51-425f-bb80-6a31d640db49/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-13 17:48:47,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a92970c-ae51-425f-bb80-6a31d640db49/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:48:47,586 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:48:47,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:48:47,586 INFO L85 PathProgramCache]: Analyzing trace with hash -915948491, now seen corresponding path program 1 times [2021-11-13 17:48:47,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:48:47,586 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373978615] [2021-11-13 17:48:47,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:48:47,587 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:48:48,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:48,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 17:48:48,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:48,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-13 17:48:48,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:48,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-13 17:48:48,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:48,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-13 17:48:48,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:48,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-13 17:48:48,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:48,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:48:48,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:48,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:48:48,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:48,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 17:48:48,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:48,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-13 17:48:48,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:48,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-13 17:48:48,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:48,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:48:48,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:48,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-13 17:48:48,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:48,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 17:48:48,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:48,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 17:48:48,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:48,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-11-13 17:48:48,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:48,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-11-13 17:48:48,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:48,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-11-13 17:48:48,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:48,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 17:48:48,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:48,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 17:48:48,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:48,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 17:48:48,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:48,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-11-13 17:48:48,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:48,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2021-11-13 17:48:48,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:48,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:48:48,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:48,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:48:48,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:48,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 17:48:48,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:48,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2021-11-13 17:48:48,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:48,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2021-11-13 17:48:48,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:49,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 17:48:49,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:49,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 17:48:49,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:49,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 17:48:49,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:49,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 191 [2021-11-13 17:48:49,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:49,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 198 [2021-11-13 17:48:49,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:49,172 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2021-11-13 17:48:49,172 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:48:49,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373978615] [2021-11-13 17:48:49,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373978615] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:48:49,173 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:48:49,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-13 17:48:49,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539585026] [2021-11-13 17:48:49,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:48:49,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-13 17:48:49,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:48:49,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-13 17:48:49,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-11-13 17:48:49,175 INFO L87 Difference]: Start difference. First operand 274 states and 344 transitions. Second operand has 12 states, 10 states have (on average 7.0) internal successors, (70), 8 states have internal predecessors, (70), 3 states have call successors, (26), 5 states have call predecessors, (26), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-13 17:48:51,260 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:48:53,431 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.17s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:48:55,581 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.15s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:48:57,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:48:57,595 INFO L93 Difference]: Finished difference Result 300 states and 384 transitions. [2021-11-13 17:48:57,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-13 17:48:57,596 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 7.0) internal successors, (70), 8 states have internal predecessors, (70), 3 states have call successors, (26), 5 states have call predecessors, (26), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 209 [2021-11-13 17:48:57,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:48:57,599 INFO L225 Difference]: With dead ends: 300 [2021-11-13 17:48:57,600 INFO L226 Difference]: Without dead ends: 298 [2021-11-13 17:48:57,601 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2021-11-13 17:48:57,602 INFO L933 BasicCegarLoop]: 158 mSDtfsCounter, 226 mSDsluCounter, 658 mSDsCounter, 0 mSdLazyCounter, 800 mSolverCounterSat, 177 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7348.34ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 816 SdHoareTripleChecker+Invalid, 980 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.20ms SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 800 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8035.27ms IncrementalHoareTripleChecker+Time [2021-11-13 17:48:57,602 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 816 Invalid, 980 Unknown, 0 Unchecked, 14.20ms Time], IncrementalHoareTripleChecker [177 Valid, 800 Invalid, 3 Unknown, 0 Unchecked, 8035.27ms Time] [2021-11-13 17:48:57,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-11-13 17:48:57,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 272. [2021-11-13 17:48:57,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 179 states have (on average 1.1508379888268156) internal successors, (206), 185 states have internal predecessors, (206), 58 states have call successors, (58), 26 states have call predecessors, (58), 34 states have return successors, (76), 60 states have call predecessors, (76), 57 states have call successors, (76) [2021-11-13 17:48:57,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 340 transitions. [2021-11-13 17:48:57,632 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 340 transitions. Word has length 209 [2021-11-13 17:48:57,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:48:57,633 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 340 transitions. [2021-11-13 17:48:57,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 7.0) internal successors, (70), 8 states have internal predecessors, (70), 3 states have call successors, (26), 5 states have call predecessors, (26), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-13 17:48:57,633 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 340 transitions. [2021-11-13 17:48:57,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2021-11-13 17:48:57,636 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:48:57,636 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:48:57,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-13 17:48:57,637 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:48:57,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:48:57,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1597638712, now seen corresponding path program 1 times [2021-11-13 17:48:57,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:48:57,638 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559540033] [2021-11-13 17:48:57,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:48:57,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:49:00,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:00,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 17:49:00,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:00,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-13 17:49:00,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:00,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-13 17:49:00,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:00,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-13 17:49:00,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:00,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-13 17:49:00,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:00,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:49:00,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:00,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:49:00,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:00,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 17:49:00,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:00,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-13 17:49:00,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:00,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-13 17:49:00,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:00,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:49:00,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:00,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-13 17:49:00,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:00,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 17:49:00,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:00,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 17:49:00,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:00,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-11-13 17:49:00,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:00,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-11-13 17:49:00,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:00,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-11-13 17:49:00,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:00,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 17:49:00,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:00,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 17:49:00,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:00,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 17:49:00,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:00,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-11-13 17:49:00,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:00,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2021-11-13 17:49:00,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:00,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:49:00,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:00,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:49:00,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:01,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 17:49:01,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:01,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2021-11-13 17:49:01,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:01,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2021-11-13 17:49:01,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:01,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 17:49:01,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:01,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 17:49:01,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:01,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 17:49:01,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:01,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 191 [2021-11-13 17:49:01,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:01,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 198 [2021-11-13 17:49:01,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:01,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 205 [2021-11-13 17:49:01,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:01,132 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 8 proven. 23 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2021-11-13 17:49:01,132 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:49:01,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559540033] [2021-11-13 17:49:01,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559540033] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:49:01,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946197047] [2021-11-13 17:49:01,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:49:01,134 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:49:01,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a92970c-ae51-425f-bb80-6a31d640db49/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:49:01,138 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a92970c-ae51-425f-bb80-6a31d640db49/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:49:01,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a92970c-ae51-425f-bb80-6a31d640db49/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-13 17:49:02,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:02,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 3032 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-13 17:49:02,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:49:03,194 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 120 proven. 0 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-11-13 17:49:03,194 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 17:49:03,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946197047] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:49:03,195 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 17:49:03,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 10 [2021-11-13 17:49:03,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439017184] [2021-11-13 17:49:03,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:49:03,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 17:49:03,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:49:03,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 17:49:03,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-11-13 17:49:03,198 INFO L87 Difference]: Start difference. First operand 272 states and 340 transitions. Second operand has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 3 states have call successors, (30), 2 states have call predecessors, (30), 4 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2021-11-13 17:49:03,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:49:03,467 INFO L93 Difference]: Finished difference Result 534 states and 667 transitions. [2021-11-13 17:49:03,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 17:49:03,468 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 3 states have call successors, (30), 2 states have call predecessors, (30), 4 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) Word has length 215 [2021-11-13 17:49:03,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:49:03,473 INFO L225 Difference]: With dead ends: 534 [2021-11-13 17:49:03,474 INFO L226 Difference]: Without dead ends: 274 [2021-11-13 17:49:03,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 277 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-11-13 17:49:03,476 INFO L933 BasicCegarLoop]: 180 mSDtfsCounter, 2 mSDsluCounter, 689 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 164.21ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 869 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.76ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 199.66ms IncrementalHoareTripleChecker+Time [2021-11-13 17:49:03,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 869 Invalid, 90 Unknown, 0 Unchecked, 3.76ms Time], IncrementalHoareTripleChecker [1 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 199.66ms Time] [2021-11-13 17:49:03,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-11-13 17:49:03,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 274. [2021-11-13 17:49:03,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 180 states have (on average 1.15) internal successors, (207), 187 states have internal predecessors, (207), 58 states have call successors, (58), 26 states have call predecessors, (58), 35 states have return successors, (77), 60 states have call predecessors, (77), 57 states have call successors, (77) [2021-11-13 17:49:03,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 342 transitions. [2021-11-13 17:49:03,510 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 342 transitions. Word has length 215 [2021-11-13 17:49:03,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:49:03,511 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 342 transitions. [2021-11-13 17:49:03,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 3 states have call successors, (30), 2 states have call predecessors, (30), 4 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2021-11-13 17:49:03,511 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 342 transitions. [2021-11-13 17:49:03,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2021-11-13 17:49:03,515 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:49:03,515 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:49:03,572 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a92970c-ae51-425f-bb80-6a31d640db49/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-13 17:49:03,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a92970c-ae51-425f-bb80-6a31d640db49/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-13 17:49:03,729 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:49:03,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:49:03,730 INFO L85 PathProgramCache]: Analyzing trace with hash 1255538849, now seen corresponding path program 1 times [2021-11-13 17:49:03,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:49:03,730 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957709828] [2021-11-13 17:49:03,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:49:03,730 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:49:03,861 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-13 17:49:03,862 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [799712811] [2021-11-13 17:49:03,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:49:03,862 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:49:03,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a92970c-ae51-425f-bb80-6a31d640db49/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:49:03,864 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a92970c-ae51-425f-bb80-6a31d640db49/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:49:03,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a92970c-ae51-425f-bb80-6a31d640db49/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-13 17:49:04,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:04,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 3111 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-13 17:49:04,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:49:05,486 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 147 proven. 3 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2021-11-13 17:49:05,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:49:06,643 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 25 proven. 6 refuted. 0 times theorem prover too weak. 238 trivial. 0 not checked. [2021-11-13 17:49:06,643 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:49:06,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957709828] [2021-11-13 17:49:06,644 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 17:49:06,644 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799712811] [2021-11-13 17:49:06,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799712811] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 17:49:06,644 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 17:49:06,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2021-11-13 17:49:06,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522679815] [2021-11-13 17:49:06,645 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 17:49:06,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-13 17:49:06,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:49:06,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-13 17:49:06,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-11-13 17:49:06,647 INFO L87 Difference]: Start difference. First operand 274 states and 342 transitions. Second operand has 12 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 5 states have call successors, (39), 3 states have call predecessors, (39), 5 states have return successors, (37), 4 states have call predecessors, (37), 5 states have call successors, (37) [2021-11-13 17:49:06,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:49:06,990 INFO L93 Difference]: Finished difference Result 431 states and 531 transitions. [2021-11-13 17:49:06,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 17:49:06,991 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 5 states have call successors, (39), 3 states have call predecessors, (39), 5 states have return successors, (37), 4 states have call predecessors, (37), 5 states have call successors, (37) Word has length 221 [2021-11-13 17:49:06,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:49:06,994 INFO L225 Difference]: With dead ends: 431 [2021-11-13 17:49:06,994 INFO L226 Difference]: Without dead ends: 239 [2021-11-13 17:49:06,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 429 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-11-13 17:49:06,996 INFO L933 BasicCegarLoop]: 180 mSDtfsCounter, 6 mSDsluCounter, 1044 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 245.04ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 1224 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.08ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 292.19ms IncrementalHoareTripleChecker+Time [2021-11-13 17:49:06,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 1224 Invalid, 144 Unknown, 0 Unchecked, 4.08ms Time], IncrementalHoareTripleChecker [5 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 292.19ms Time] [2021-11-13 17:49:06,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-11-13 17:49:07,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 227. [2021-11-13 17:49:07,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 151 states have (on average 1.1456953642384107) internal successors, (173), 155 states have internal predecessors, (173), 46 states have call successors, (46), 25 states have call predecessors, (46), 29 states have return successors, (53), 46 states have call predecessors, (53), 45 states have call successors, (53) [2021-11-13 17:49:07,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 272 transitions. [2021-11-13 17:49:07,022 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 272 transitions. Word has length 221 [2021-11-13 17:49:07,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:49:07,022 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 272 transitions. [2021-11-13 17:49:07,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 5 states have call successors, (39), 3 states have call predecessors, (39), 5 states have return successors, (37), 4 states have call predecessors, (37), 5 states have call successors, (37) [2021-11-13 17:49:07,023 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 272 transitions. [2021-11-13 17:49:07,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2021-11-13 17:49:07,025 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:49:07,025 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:49:07,076 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a92970c-ae51-425f-bb80-6a31d640db49/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-13 17:49:07,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a92970c-ae51-425f-bb80-6a31d640db49/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-13 17:49:07,254 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:49:07,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:49:07,254 INFO L85 PathProgramCache]: Analyzing trace with hash 819896616, now seen corresponding path program 1 times [2021-11-13 17:49:07,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:49:07,255 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718274731] [2021-11-13 17:49:07,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:49:07,255 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:49:07,367 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-13 17:49:07,368 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1792862502] [2021-11-13 17:49:07,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:49:07,368 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:49:07,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a92970c-ae51-425f-bb80-6a31d640db49/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:49:07,369 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a92970c-ae51-425f-bb80-6a31d640db49/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:49:07,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a92970c-ae51-425f-bb80-6a31d640db49/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-13 17:57:23,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:23,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 3190 conjuncts, 99 conjunts are in the unsatisfiable core [2021-11-13 17:57:23,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:57:24,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-13 17:57:24,775 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-13 17:57:24,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 37 [2021-11-13 17:57:27,131 WARN L860 $PredicateComparison]: unable to prove that (exists ((|aws_mul_size_checked_aws_mul_u64_checked_~b#1| Int) (|aws_mul_size_checked_aws_mul_u64_checked_~r#1.offset| Int) (|aws_mul_size_checked_aws_mul_u64_checked_~a#1| Int)) (= |c_#memory_int| (store |c_old(#memory_int)| |c_aws_mul_size_checked_#in~r#1.base| (store (select |c_old(#memory_int)| |c_aws_mul_size_checked_#in~r#1.base|) |aws_mul_size_checked_aws_mul_u64_checked_~r#1.offset| (* |aws_mul_size_checked_aws_mul_u64_checked_~b#1| |aws_mul_size_checked_aws_mul_u64_checked_~a#1|))))) is different from true [2021-11-13 17:57:31,354 WARN L860 $PredicateComparison]: unable to prove that (exists ((|aws_add_size_checked_aws_add_u64_checked_~a#1| Int) (|aws_add_size_checked_aws_add_u64_checked_~b#1| Int) (|aws_add_size_checked_aws_add_u64_checked_~r#1.offset| Int)) (= |c_#memory_int| (store |c_old(#memory_int)| |c_aws_add_size_checked_#in~r#1.base| (store (select |c_old(#memory_int)| |c_aws_add_size_checked_#in~r#1.base|) |aws_add_size_checked_aws_add_u64_checked_~r#1.offset| (+ |aws_add_size_checked_aws_add_u64_checked_~b#1| |aws_add_size_checked_aws_add_u64_checked_~a#1|))))) is different from true [2021-11-13 17:57:35,596 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-13 17:57:35,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 1 case distinctions, treesize of input 66 treesize of output 51 [2021-11-13 17:57:35,661 INFO L354 Elim1Store]: treesize reduction 36, result has 26.5 percent of original size [2021-11-13 17:57:35,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 46 [2021-11-13 17:57:37,817 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 17:57:37,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 14 [2021-11-13 17:57:38,043 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 116 proven. 80 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-11-13 17:57:38,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:57:41,715 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2021-11-13 17:57:41,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:57:41,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718274731] [2021-11-13 17:57:41,716 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 17:57:41,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792862502] [2021-11-13 17:57:41,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792862502] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 17:57:41,716 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 17:57:41,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 14] total 45 [2021-11-13 17:57:41,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106162742] [2021-11-13 17:57:41,717 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 17:57:41,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-11-13 17:57:41,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:57:41,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-11-13 17:57:41,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1664, Unknown=5, NotChecked=166, Total=1980 [2021-11-13 17:57:41,719 INFO L87 Difference]: Start difference. First operand 227 states and 272 transitions. Second operand has 45 states, 37 states have (on average 4.27027027027027) internal successors, (158), 36 states have internal predecessors, (158), 21 states have call successors, (48), 8 states have call predecessors, (48), 11 states have return successors, (45), 18 states have call predecessors, (45), 19 states have call successors, (45) [2021-11-13 17:57:43,804 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:57:46,039 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.23s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:57:48,177 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:57:50,356 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.18s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:57:52,519 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.16s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:57:54,737 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.22s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:58:05,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:58:05,528 INFO L93 Difference]: Finished difference Result 384 states and 494 transitions. [2021-11-13 17:58:05,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-11-13 17:58:05,529 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 37 states have (on average 4.27027027027027) internal successors, (158), 36 states have internal predecessors, (158), 21 states have call successors, (48), 8 states have call predecessors, (48), 11 states have return successors, (45), 18 states have call predecessors, (45), 19 states have call successors, (45) Word has length 227 [2021-11-13 17:58:05,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:58:05,533 INFO L225 Difference]: With dead ends: 384 [2021-11-13 17:58:05,533 INFO L226 Difference]: Without dead ends: 382 [2021-11-13 17:58:05,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 490 GetRequests, 404 SyntacticMatches, 9 SemanticMatches, 77 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1277 ImplicationChecksByTransitivity, 17.8s TimeCoverageRelationStatistics Valid=486, Invalid=5369, Unknown=5, NotChecked=302, Total=6162 [2021-11-13 17:58:05,536 INFO L933 BasicCegarLoop]: 192 mSDtfsCounter, 268 mSDsluCounter, 2446 mSDsCounter, 0 mSdLazyCounter, 3489 mSolverCounterSat, 330 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17872.07ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 2638 SdHoareTripleChecker+Invalid, 5869 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 41.81ms SdHoareTripleChecker+Time, 330 IncrementalHoareTripleChecker+Valid, 3489 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 2044 IncrementalHoareTripleChecker+Unchecked, 19978.24ms IncrementalHoareTripleChecker+Time [2021-11-13 17:58:05,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 2638 Invalid, 5869 Unknown, 0 Unchecked, 41.81ms Time], IncrementalHoareTripleChecker [330 Valid, 3489 Invalid, 6 Unknown, 2044 Unchecked, 19978.24ms Time] [2021-11-13 17:58:05,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-11-13 17:58:05,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 341. [2021-11-13 17:58:05,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 224 states have (on average 1.1294642857142858) internal successors, (253), 232 states have internal predecessors, (253), 73 states have call successors, (73), 36 states have call predecessors, (73), 43 states have return successors, (95), 72 states have call predecessors, (95), 72 states have call successors, (95) [2021-11-13 17:58:05,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 421 transitions. [2021-11-13 17:58:05,567 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 421 transitions. Word has length 227 [2021-11-13 17:58:05,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:58:05,568 INFO L470 AbstractCegarLoop]: Abstraction has 341 states and 421 transitions. [2021-11-13 17:58:05,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 37 states have (on average 4.27027027027027) internal successors, (158), 36 states have internal predecessors, (158), 21 states have call successors, (48), 8 states have call predecessors, (48), 11 states have return successors, (45), 18 states have call predecessors, (45), 19 states have call successors, (45) [2021-11-13 17:58:05,569 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 421 transitions. [2021-11-13 17:58:05,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2021-11-13 17:58:05,571 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:58:05,571 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:58:05,785 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a92970c-ae51-425f-bb80-6a31d640db49/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forcibly destroying the process [2021-11-13 17:58:05,801 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a92970c-ae51-425f-bb80-6a31d640db49/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-13 17:58:05,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a92970c-ae51-425f-bb80-6a31d640db49/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:58:05,801 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:58:05,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:58:05,802 INFO L85 PathProgramCache]: Analyzing trace with hash -1174248090, now seen corresponding path program 1 times [2021-11-13 17:58:05,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:58:05,802 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811885815] [2021-11-13 17:58:05,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:58:05,802 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:58:05,897 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-13 17:58:05,897 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1764073249] [2021-11-13 17:58:05,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:58:05,897 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:58:05,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a92970c-ae51-425f-bb80-6a31d640db49/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:58:05,901 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a92970c-ae51-425f-bb80-6a31d640db49/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:58:05,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a92970c-ae51-425f-bb80-6a31d640db49/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-13 17:58:06,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:58:06,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 3193 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-13 17:58:06,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:58:07,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 10 treesize of output 4 [2021-11-13 17:58:07,232 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-13 17:58:07,232 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 17:58:07,232 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:58:07,232 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811885815] [2021-11-13 17:58:07,232 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 17:58:07,232 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764073249] [2021-11-13 17:58:07,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764073249] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:58:07,232 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:58:07,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-13 17:58:07,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369905636] [2021-11-13 17:58:07,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:58:07,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 17:58:07,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:58:07,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 17:58:07,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-13 17:58:07,234 INFO L87 Difference]: Start difference. First operand 341 states and 421 transitions. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (28), 3 states have call predecessors, (28), 3 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) [2021-11-13 17:58:09,297 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:58:09,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:58:09,690 INFO L93 Difference]: Finished difference Result 450 states and 556 transitions. [2021-11-13 17:58:09,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 17:58:09,690 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (28), 3 states have call predecessors, (28), 3 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) Word has length 227 [2021-11-13 17:58:09,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:58:09,693 INFO L225 Difference]: With dead ends: 450 [2021-11-13 17:58:09,693 INFO L226 Difference]: Without dead ends: 345 [2021-11-13 17:58:09,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 221 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-13 17:58:09,694 INFO L933 BasicCegarLoop]: 187 mSDtfsCounter, 3 mSDsluCounter, 500 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2141.01ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 687 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.40ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 2421.42ms IncrementalHoareTripleChecker+Time [2021-11-13 17:58:09,694 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 687 Invalid, 77 Unknown, 0 Unchecked, 1.40ms Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 1 Unknown, 33 Unchecked, 2421.42ms Time] [2021-11-13 17:58:09,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-11-13 17:58:09,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 345. [2021-11-13 17:58:09,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 227 states have (on average 1.118942731277533) internal successors, (254), 235 states have internal predecessors, (254), 73 states have call successors, (73), 37 states have call predecessors, (73), 44 states have return successors, (95), 72 states have call predecessors, (95), 72 states have call successors, (95) [2021-11-13 17:58:09,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 422 transitions. [2021-11-13 17:58:09,723 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 422 transitions. Word has length 227 [2021-11-13 17:58:09,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:58:09,723 INFO L470 AbstractCegarLoop]: Abstraction has 345 states and 422 transitions. [2021-11-13 17:58:09,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (28), 3 states have call predecessors, (28), 3 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) [2021-11-13 17:58:09,724 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 422 transitions. [2021-11-13 17:58:09,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2021-11-13 17:58:09,726 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:58:09,726 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:58:09,768 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a92970c-ae51-425f-bb80-6a31d640db49/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-11-13 17:58:09,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a92970c-ae51-425f-bb80-6a31d640db49/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:58:09,950 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:58:09,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:58:09,950 INFO L85 PathProgramCache]: Analyzing trace with hash -473183512, now seen corresponding path program 1 times [2021-11-13 17:58:09,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:58:09,950 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989003840] [2021-11-13 17:58:09,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:58:09,950 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:58:10,021 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-13 17:58:10,021 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1223747865] [2021-11-13 17:58:10,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:58:10,022 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:58:10,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a92970c-ae51-425f-bb80-6a31d640db49/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:58:10,023 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a92970c-ae51-425f-bb80-6a31d640db49/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:58:10,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a92970c-ae51-425f-bb80-6a31d640db49/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-13 17:58:11,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:58:11,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 3196 conjuncts, 77 conjunts are in the unsatisfiable core [2021-11-13 17:58:11,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:58:11,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 15 treesize of output 1 [2021-11-13 17:58:11,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-13 17:58:12,444 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-13 17:58:12,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 37 [2021-11-13 17:58:12,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 35 treesize of output 31 [2021-11-13 17:58:14,663 WARN L860 $PredicateComparison]: unable to prove that (exists ((|aws_mul_size_checked_aws_mul_u64_checked_~b#1| Int) (|aws_mul_size_checked_aws_mul_u64_checked_~r#1.offset| Int) (|aws_mul_size_checked_aws_mul_u64_checked_~a#1| Int)) (= |c_#memory_int| (store |c_old(#memory_int)| |c_aws_mul_size_checked_#in~r#1.base| (store (select |c_old(#memory_int)| |c_aws_mul_size_checked_#in~r#1.base|) |aws_mul_size_checked_aws_mul_u64_checked_~r#1.offset| (* |aws_mul_size_checked_aws_mul_u64_checked_~b#1| |aws_mul_size_checked_aws_mul_u64_checked_~a#1|))))) is different from true [2021-11-13 17:58:18,786 WARN L860 $PredicateComparison]: unable to prove that (exists ((|aws_add_size_checked_aws_add_u64_checked_~a#1| Int) (|aws_add_size_checked_aws_add_u64_checked_~b#1| Int) (|aws_add_size_checked_aws_add_u64_checked_~r#1.offset| Int) (|aws_add_size_checked_aws_add_u64_checked_~r#1.base| Int)) (= (store |c_old(#memory_int)| |aws_add_size_checked_aws_add_u64_checked_~r#1.base| (store (select |c_old(#memory_int)| |aws_add_size_checked_aws_add_u64_checked_~r#1.base|) |aws_add_size_checked_aws_add_u64_checked_~r#1.offset| (+ |aws_add_size_checked_aws_add_u64_checked_~b#1| |aws_add_size_checked_aws_add_u64_checked_~a#1|))) |c_#memory_int|)) is different from true [2021-11-13 17:58:25,034 INFO L354 Elim1Store]: treesize reduction 80, result has 31.6 percent of original size [2021-11-13 17:58:25,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 75 treesize of output 81 [2021-11-13 17:58:25,082 INFO L354 Elim1Store]: treesize reduction 36, result has 26.5 percent of original size [2021-11-13 17:58:25,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 69 treesize of output 73 [2021-11-13 17:58:27,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-13 17:58:27,574 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 132 proven. 54 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-11-13 17:58:27,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:58:29,351 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 271 trivial. 0 not checked. [2021-11-13 17:58:29,352 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:58:29,352 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989003840] [2021-11-13 17:58:29,352 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 17:58:29,352 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223747865] [2021-11-13 17:58:29,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223747865] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 17:58:29,353 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 17:58:29,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 11] total 35 [2021-11-13 17:58:29,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728843196] [2021-11-13 17:58:29,353 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 17:58:29,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-13 17:58:29,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:58:29,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-13 17:58:29,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=956, Unknown=6, NotChecked=126, Total=1190 [2021-11-13 17:58:29,359 INFO L87 Difference]: Start difference. First operand 345 states and 422 transitions. Second operand has 35 states, 30 states have (on average 5.033333333333333) internal successors, (151), 33 states have internal predecessors, (151), 17 states have call successors, (47), 8 states have call predecessors, (47), 11 states have return successors, (44), 13 states have call predecessors, (44), 16 states have call successors, (44) [2021-11-13 17:58:31,428 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:58:33,653 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.22s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:58:35,881 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.23s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:58:38,118 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.24s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:58:40,320 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.20s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:58:42,532 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.21s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:58:48,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:58:48,990 INFO L93 Difference]: Finished difference Result 501 states and 619 transitions. [2021-11-13 17:58:48,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-13 17:58:48,992 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 30 states have (on average 5.033333333333333) internal successors, (151), 33 states have internal predecessors, (151), 17 states have call successors, (47), 8 states have call predecessors, (47), 11 states have return successors, (44), 13 states have call predecessors, (44), 16 states have call successors, (44) Word has length 227 [2021-11-13 17:58:48,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:58:48,996 INFO L225 Difference]: With dead ends: 501 [2021-11-13 17:58:48,997 INFO L226 Difference]: Without dead ends: 390 [2021-11-13 17:58:48,999 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 418 SyntacticMatches, 6 SemanticMatches, 57 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 16.6s TimeCoverageRelationStatistics Valid=304, Invalid=2890, Unknown=6, NotChecked=222, Total=3422 [2021-11-13 17:58:49,000 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 242 mSDsluCounter, 1956 mSDsCounter, 0 mSdLazyCounter, 2852 mSolverCounterSat, 219 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16005.05ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 2147 SdHoareTripleChecker+Invalid, 4774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 26.01ms SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 2852 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 1697 IncrementalHoareTripleChecker+Unchecked, 18006.71ms IncrementalHoareTripleChecker+Time [2021-11-13 17:58:49,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 2147 Invalid, 4774 Unknown, 0 Unchecked, 26.01ms Time], IncrementalHoareTripleChecker [219 Valid, 2852 Invalid, 6 Unknown, 1697 Unchecked, 18006.71ms Time] [2021-11-13 17:58:49,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-11-13 17:58:49,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 366. [2021-11-13 17:58:49,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 243 states have (on average 1.1193415637860082) internal successors, (272), 252 states have internal predecessors, (272), 75 states have call successors, (75), 39 states have call predecessors, (75), 47 states have return successors, (95), 74 states have call predecessors, (95), 74 states have call successors, (95) [2021-11-13 17:58:49,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 442 transitions. [2021-11-13 17:58:49,068 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 442 transitions. Word has length 227 [2021-11-13 17:58:49,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:58:49,069 INFO L470 AbstractCegarLoop]: Abstraction has 366 states and 442 transitions. [2021-11-13 17:58:49,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 30 states have (on average 5.033333333333333) internal successors, (151), 33 states have internal predecessors, (151), 17 states have call successors, (47), 8 states have call predecessors, (47), 11 states have return successors, (44), 13 states have call predecessors, (44), 16 states have call successors, (44) [2021-11-13 17:58:49,070 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 442 transitions. [2021-11-13 17:58:49,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2021-11-13 17:58:49,074 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:58:49,074 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:58:49,114 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a92970c-ae51-425f-bb80-6a31d640db49/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-13 17:58:49,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a92970c-ae51-425f-bb80-6a31d640db49/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:58:49,290 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:58:49,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:58:49,291 INFO L85 PathProgramCache]: Analyzing trace with hash 692282627, now seen corresponding path program 1 times [2021-11-13 17:58:49,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:58:49,291 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685895497] [2021-11-13 17:58:49,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:58:49,291 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:58:49,364 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-13 17:58:49,366 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [202759719] [2021-11-13 17:58:49,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:58:49,366 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:58:49,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a92970c-ae51-425f-bb80-6a31d640db49/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:58:49,367 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a92970c-ae51-425f-bb80-6a31d640db49/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:58:49,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a92970c-ae51-425f-bb80-6a31d640db49/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-13 17:58:50,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:58:50,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 3201 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-13 17:58:50,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:58:51,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 35 treesize of output 17 [2021-11-13 17:58:51,396 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2021-11-13 17:58:51,396 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 17:58:51,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:58:51,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685895497] [2021-11-13 17:58:51,397 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 17:58:51,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202759719] [2021-11-13 17:58:51,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202759719] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:58:51,397 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:58:51,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-13 17:58:51,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408030731] [2021-11-13 17:58:51,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:58:51,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-13 17:58:51,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:58:51,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-13 17:58:51,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-13 17:58:51,399 INFO L87 Difference]: Start difference. First operand 366 states and 442 transitions. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 4 states have call successors, (29), 3 states have call predecessors, (29), 4 states have return successors, (27), 4 states have call predecessors, (27), 4 states have call successors, (27) [2021-11-13 17:58:53,463 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:58:55,695 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.23s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:58:56,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:58:56,531 INFO L93 Difference]: Finished difference Result 505 states and 616 transitions. [2021-11-13 17:58:56,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-13 17:58:56,532 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 4 states have call successors, (29), 3 states have call predecessors, (29), 4 states have return successors, (27), 4 states have call predecessors, (27), 4 states have call successors, (27) Word has length 230 [2021-11-13 17:58:56,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:58:56,536 INFO L225 Difference]: With dead ends: 505 [2021-11-13 17:58:56,536 INFO L226 Difference]: Without dead ends: 394 [2021-11-13 17:58:56,537 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 222 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-11-13 17:58:56,538 INFO L933 BasicCegarLoop]: 180 mSDtfsCounter, 46 mSDsluCounter, 788 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4365.40ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 968 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.89ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 4926.73ms IncrementalHoareTripleChecker+Time [2021-11-13 17:58:56,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 968 Invalid, 222 Unknown, 0 Unchecked, 2.89ms Time], IncrementalHoareTripleChecker [3 Valid, 178 Invalid, 2 Unknown, 39 Unchecked, 4926.73ms Time] [2021-11-13 17:58:56,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-11-13 17:58:56,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 376. [2021-11-13 17:58:56,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 250 states have (on average 1.116) internal successors, (279), 257 states have internal predecessors, (279), 77 states have call successors, (77), 40 states have call predecessors, (77), 48 states have return successors, (97), 78 states have call predecessors, (97), 76 states have call successors, (97) [2021-11-13 17:58:56,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 453 transitions. [2021-11-13 17:58:56,569 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 453 transitions. Word has length 230 [2021-11-13 17:58:56,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:58:56,570 INFO L470 AbstractCegarLoop]: Abstraction has 376 states and 453 transitions. [2021-11-13 17:58:56,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 4 states have call successors, (29), 3 states have call predecessors, (29), 4 states have return successors, (27), 4 states have call predecessors, (27), 4 states have call successors, (27) [2021-11-13 17:58:56,571 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 453 transitions. [2021-11-13 17:58:56,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2021-11-13 17:58:56,573 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:58:56,573 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:58:56,622 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a92970c-ae51-425f-bb80-6a31d640db49/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-13 17:58:56,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a92970c-ae51-425f-bb80-6a31d640db49/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:58:56,790 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:58:56,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:58:56,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1548526073, now seen corresponding path program 1 times [2021-11-13 17:58:56,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:58:56,790 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301069477] [2021-11-13 17:58:56,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:58:56,790 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:58:56,880 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-13 17:58:56,880 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [688567955] [2021-11-13 17:58:56,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:58:56,881 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:58:56,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a92970c-ae51-425f-bb80-6a31d640db49/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:58:56,882 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a92970c-ae51-425f-bb80-6a31d640db49/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:58:56,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a92970c-ae51-425f-bb80-6a31d640db49/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-13 17:58:57,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:58:57,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 3223 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-13 17:58:57,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:58:58,213 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 139 proven. 0 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2021-11-13 17:58:58,213 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 17:58:58,213 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:58:58,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301069477] [2021-11-13 17:58:58,214 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 17:58:58,214 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688567955] [2021-11-13 17:58:58,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688567955] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:58:58,214 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:58:58,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 17:58:58,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713361177] [2021-11-13 17:58:58,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:58:58,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 17:58:58,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:58:58,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 17:58:58,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-13 17:58:58,216 INFO L87 Difference]: Start difference. First operand 376 states and 453 transitions. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 6 states have internal predecessors, (110), 2 states have call successors, (32), 2 states have call predecessors, (32), 4 states have return successors, (31), 4 states have call predecessors, (31), 2 states have call successors, (31) [2021-11-13 17:58:58,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:58:58,290 INFO L93 Difference]: Finished difference Result 745 states and 895 transitions. [2021-11-13 17:58:58,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 17:58:58,292 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 6 states have internal predecessors, (110), 2 states have call successors, (32), 2 states have call predecessors, (32), 4 states have return successors, (31), 4 states have call predecessors, (31), 2 states have call successors, (31) Word has length 236 [2021-11-13 17:58:58,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:58:58,300 INFO L225 Difference]: With dead ends: 745 [2021-11-13 17:58:58,300 INFO L226 Difference]: Without dead ends: 365 [2021-11-13 17:58:58,303 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:58:58,304 INFO L933 BasicCegarLoop]: 188 mSDtfsCounter, 2 mSDsluCounter, 927 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.54ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1115 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.65ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.61ms IncrementalHoareTripleChecker+Time [2021-11-13 17:58:58,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1115 Invalid, 21 Unknown, 0 Unchecked, 1.65ms Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 31.61ms Time] [2021-11-13 17:58:58,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-11-13 17:58:58,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 365. [2021-11-13 17:58:58,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 243 states have (on average 1.1111111111111112) internal successors, (270), 249 states have internal predecessors, (270), 75 states have call successors, (75), 39 states have call predecessors, (75), 46 states have return successors, (92), 76 states have call predecessors, (92), 74 states have call successors, (92) [2021-11-13 17:58:58,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 437 transitions. [2021-11-13 17:58:58,335 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 437 transitions. Word has length 236 [2021-11-13 17:58:58,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:58:58,335 INFO L470 AbstractCegarLoop]: Abstraction has 365 states and 437 transitions. [2021-11-13 17:58:58,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 6 states have internal predecessors, (110), 2 states have call successors, (32), 2 states have call predecessors, (32), 4 states have return successors, (31), 4 states have call predecessors, (31), 2 states have call successors, (31) [2021-11-13 17:58:58,336 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 437 transitions. [2021-11-13 17:58:58,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2021-11-13 17:58:58,338 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:58:58,339 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:58:58,383 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a92970c-ae51-425f-bb80-6a31d640db49/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-13 17:58:58,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a92970c-ae51-425f-bb80-6a31d640db49/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:58:58,554 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:58:58,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:58:58,554 INFO L85 PathProgramCache]: Analyzing trace with hash -600797501, now seen corresponding path program 1 times [2021-11-13 17:58:58,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:58:58,554 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215250107] [2021-11-13 17:58:58,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:58:58,555 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:58:58,642 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-13 17:58:58,643 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1393828439] [2021-11-13 17:58:58,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:58:58,643 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:58:58,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a92970c-ae51-425f-bb80-6a31d640db49/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:58:58,644 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a92970c-ae51-425f-bb80-6a31d640db49/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:58:58,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a92970c-ae51-425f-bb80-6a31d640db49/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-13 17:59:00,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:59:00,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 3207 conjuncts, 76 conjunts are in the unsatisfiable core [2021-11-13 17:59:00,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:59:00,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-13 17:59:00,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 15 treesize of output 1 [2021-11-13 17:59:01,675 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-11-13 17:59:01,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 20 treesize of output 22 [2021-11-13 17:59:01,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 7 treesize of output 3 [2021-11-13 17:59:03,794 WARN L860 $PredicateComparison]: unable to prove that (exists ((|aws_mul_size_checked_aws_mul_u64_checked_~b#1| Int) (|aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| Int) (|aws_mul_size_checked_aws_mul_u64_checked_~r#1.offset| Int) (|aws_mul_size_checked_aws_mul_u64_checked_~a#1| Int)) (= |c_#memory_int| (store |c_old(#memory_int)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| (store (select |c_old(#memory_int)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) |aws_mul_size_checked_aws_mul_u64_checked_~r#1.offset| (* |aws_mul_size_checked_aws_mul_u64_checked_~b#1| |aws_mul_size_checked_aws_mul_u64_checked_~a#1|))))) is different from true [2021-11-13 17:59:09,923 WARN L860 $PredicateComparison]: unable to prove that (exists ((|aws_add_size_checked_aws_add_u64_checked_~a#1| Int) (|aws_add_size_checked_aws_add_u64_checked_~b#1| Int) (|aws_add_size_checked_aws_add_u64_checked_~r#1.offset| Int)) (= |c_#memory_int| (store |c_old(#memory_int)| |c_aws_add_size_checked_#in~r#1.base| (store (select |c_old(#memory_int)| |c_aws_add_size_checked_#in~r#1.base|) |aws_add_size_checked_aws_add_u64_checked_~r#1.offset| (+ |aws_add_size_checked_aws_add_u64_checked_~b#1| |aws_add_size_checked_aws_add_u64_checked_~a#1|))))) is different from true [2021-11-13 17:59:11,943 WARN L860 $PredicateComparison]: unable to prove that (exists ((|aws_mul_size_checked_aws_mul_u64_checked_~b#1| Int) (|aws_add_size_checked_aws_add_u64_checked_~a#1| Int) (|aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| Int) (|aws_mul_size_checked_aws_mul_u64_checked_~r#1.offset| Int) (|aws_mul_size_checked_aws_mul_u64_checked_~a#1| Int) (|aws_add_size_checked_aws_add_u64_checked_~b#1| Int) (|aws_add_size_checked_aws_add_u64_checked_~r#1.offset| Int)) (= |c_#memory_int| (let ((.cse0 (store |c_old(#memory_int)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| (store (select |c_old(#memory_int)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) |aws_mul_size_checked_aws_mul_u64_checked_~r#1.offset| (* |aws_mul_size_checked_aws_mul_u64_checked_~b#1| |aws_mul_size_checked_aws_mul_u64_checked_~a#1|))))) (store .cse0 |c_hash_table_state_required_bytes_#in~required_bytes.base| (store (select .cse0 |c_hash_table_state_required_bytes_#in~required_bytes.base|) |aws_add_size_checked_aws_add_u64_checked_~r#1.offset| (+ |aws_add_size_checked_aws_add_u64_checked_~b#1| |aws_add_size_checked_aws_add_u64_checked_~a#1|)))))) is different from true [2021-11-13 17:59:12,064 INFO L354 Elim1Store]: treesize reduction 80, result has 31.6 percent of original size [2021-11-13 17:59:12,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 47 treesize of output 53 [2021-11-13 17:59:13,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-13 17:59:13,376 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 132 proven. 54 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-11-13 17:59:13,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:59:15,406 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 271 trivial. 0 not checked. [2021-11-13 17:59:15,406 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:59:15,406 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215250107] [2021-11-13 17:59:15,407 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 17:59:15,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393828439] [2021-11-13 17:59:15,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393828439] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 17:59:15,407 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 17:59:15,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 12] total 36 [2021-11-13 17:59:15,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087369385] [2021-11-13 17:59:15,407 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 17:59:15,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-13 17:59:15,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:59:15,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-13 17:59:15,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=965, Unknown=4, NotChecked=192, Total=1260 [2021-11-13 17:59:15,410 INFO L87 Difference]: Start difference. First operand 365 states and 437 transitions. Second operand has 36 states, 31 states have (on average 5.064516129032258) internal successors, (157), 35 states have internal predecessors, (157), 17 states have call successors, (47), 7 states have call predecessors, (47), 11 states have return successors, (44), 13 states have call predecessors, (44), 16 states have call successors, (44) [2021-11-13 17:59:17,487 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:59:19,814 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.33s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:59:21,927 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:59:24,054 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:59:26,244 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.19s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:59:28,338 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:59:30,462 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:59:37,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:59:37,583 INFO L93 Difference]: Finished difference Result 671 states and 836 transitions. [2021-11-13 17:59:37,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-13 17:59:37,584 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 31 states have (on average 5.064516129032258) internal successors, (157), 35 states have internal predecessors, (157), 17 states have call successors, (47), 7 states have call predecessors, (47), 11 states have return successors, (44), 13 states have call predecessors, (44), 16 states have call successors, (44) Word has length 230 [2021-11-13 17:59:37,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:59:37,587 INFO L225 Difference]: With dead ends: 671 [2021-11-13 17:59:37,588 INFO L226 Difference]: Without dead ends: 447 [2021-11-13 17:59:37,590 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 494 GetRequests, 426 SyntacticMatches, 6 SemanticMatches, 62 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=327, Invalid=3341, Unknown=4, NotChecked=360, Total=4032 [2021-11-13 17:59:37,591 INFO L933 BasicCegarLoop]: 174 mSDtfsCounter, 208 mSDsluCounter, 1629 mSDsCounter, 0 mSdLazyCounter, 3119 mSolverCounterSat, 176 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18200.63ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 1803 SdHoareTripleChecker+Invalid, 5424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 21.93ms SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 3119 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 2122 IncrementalHoareTripleChecker+Unchecked, 20037.39ms IncrementalHoareTripleChecker+Time [2021-11-13 17:59:37,591 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 1803 Invalid, 5424 Unknown, 0 Unchecked, 21.93ms Time], IncrementalHoareTripleChecker [176 Valid, 3119 Invalid, 7 Unknown, 2122 Unchecked, 20037.39ms Time] [2021-11-13 17:59:37,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-11-13 17:59:37,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 348. [2021-11-13 17:59:37,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 231 states have (on average 1.1082251082251082) internal successors, (256), 237 states have internal predecessors, (256), 73 states have call successors, (73), 38 states have call predecessors, (73), 43 states have return successors, (84), 72 states have call predecessors, (84), 72 states have call successors, (84) [2021-11-13 17:59:37,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 413 transitions. [2021-11-13 17:59:37,624 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 413 transitions. Word has length 230 [2021-11-13 17:59:37,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:59:37,624 INFO L470 AbstractCegarLoop]: Abstraction has 348 states and 413 transitions. [2021-11-13 17:59:37,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 31 states have (on average 5.064516129032258) internal successors, (157), 35 states have internal predecessors, (157), 17 states have call successors, (47), 7 states have call predecessors, (47), 11 states have return successors, (44), 13 states have call predecessors, (44), 16 states have call successors, (44) [2021-11-13 17:59:37,625 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 413 transitions. [2021-11-13 17:59:37,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2021-11-13 17:59:37,627 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:59:37,628 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:59:37,696 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a92970c-ae51-425f-bb80-6a31d640db49/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-13 17:59:37,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a92970c-ae51-425f-bb80-6a31d640db49/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-13 17:59:37,896 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:59:37,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:59:37,897 INFO L85 PathProgramCache]: Analyzing trace with hash -476069262, now seen corresponding path program 1 times [2021-11-13 17:59:37,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:59:37,898 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562082558] [2021-11-13 17:59:37,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:59:37,898 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:59:37,966 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-13 17:59:37,967 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [223276685] [2021-11-13 17:59:37,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:59:37,967 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:59:37,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a92970c-ae51-425f-bb80-6a31d640db49/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:59:37,973 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a92970c-ae51-425f-bb80-6a31d640db49/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:59:37,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a92970c-ae51-425f-bb80-6a31d640db49/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-13 17:59:39,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:59:39,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 3234 conjuncts, 86 conjunts are in the unsatisfiable core [2021-11-13 17:59:39,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:59:39,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-13 17:59:39,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 15 treesize of output 1 [2021-11-13 17:59:40,334 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-13 17:59:40,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 37 [2021-11-13 17:59:40,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 35 treesize of output 31 [2021-11-13 17:59:42,586 WARN L860 $PredicateComparison]: unable to prove that (exists ((|aws_mul_size_checked_aws_mul_u64_checked_~b#1| Int) (|aws_mul_size_checked_aws_mul_u64_checked_~r#1.offset| Int) (|aws_mul_size_checked_aws_mul_u64_checked_~a#1| Int)) (= |c_#memory_int| (store |c_old(#memory_int)| |c_aws_mul_size_checked_#in~r#1.base| (store (select |c_old(#memory_int)| |c_aws_mul_size_checked_#in~r#1.base|) |aws_mul_size_checked_aws_mul_u64_checked_~r#1.offset| (* |aws_mul_size_checked_aws_mul_u64_checked_~b#1| |aws_mul_size_checked_aws_mul_u64_checked_~a#1|))))) is different from true [2021-11-13 17:59:46,771 WARN L860 $PredicateComparison]: unable to prove that (exists ((|aws_add_size_checked_aws_add_u64_checked_~a#1| Int) (|aws_add_size_checked_aws_add_u64_checked_~b#1| Int) (|aws_add_size_checked_aws_add_u64_checked_~r#1.offset| Int)) (= |c_#memory_int| (store |c_old(#memory_int)| |c_aws_add_size_checked_#in~r#1.base| (store (select |c_old(#memory_int)| |c_aws_add_size_checked_#in~r#1.base|) |aws_add_size_checked_aws_add_u64_checked_~r#1.offset| (+ |aws_add_size_checked_aws_add_u64_checked_~b#1| |aws_add_size_checked_aws_add_u64_checked_~a#1|))))) is different from true [2021-11-13 17:59:50,965 INFO L354 Elim1Store]: treesize reduction 98, result has 16.2 percent of original size [2021-11-13 17:59:50,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 75 treesize of output 63 [2021-11-13 17:59:50,999 INFO L354 Elim1Store]: treesize reduction 36, result has 26.5 percent of original size [2021-11-13 17:59:51,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 55 [2021-11-13 17:59:51,327 INFO L354 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2021-11-13 17:59:51,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 30 [2021-11-13 17:59:51,694 INFO L354 Elim1Store]: treesize reduction 226, result has 36.3 percent of original size [2021-11-13 17:59:51,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 8 new quantified variables, introduced 14 case distinctions, treesize of input 92 treesize of output 194 [2021-11-13 17:59:54,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:59:54,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:59:54,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:59:54,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 20 [2021-11-13 17:59:54,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:59:54,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:59:54,598 INFO L354 Elim1Store]: treesize reduction 56, result has 1.8 percent of original size [2021-11-13 17:59:54,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 55 treesize of output 29 [2021-11-13 17:59:54,682 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-13 17:59:55,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:59:55,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:59:55,166 INFO L354 Elim1Store]: treesize reduction 103, result has 12.0 percent of original size [2021-11-13 17:59:55,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 73 treesize of output 49 [2021-11-13 17:59:55,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:59:55,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:59:55,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:59:55,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:59:55,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 17:59:55,323 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-11-13 17:59:55,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 58 treesize of output 23 [2021-11-13 17:59:55,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:59:55,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:59:55,770 INFO L354 Elim1Store]: treesize reduction 61, result has 29.9 percent of original size [2021-11-13 17:59:55,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 64 treesize of output 57 [2021-11-13 17:59:56,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:59:56,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:59:56,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:59:56,165 INFO L354 Elim1Store]: treesize reduction 75, result has 25.7 percent of original size [2021-11-13 17:59:56,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 8 case distinctions, treesize of input 64 treesize of output 57 [2021-11-13 17:59:56,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:59:56,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:59:56,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:59:56,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:59:56,797 INFO L354 Elim1Store]: treesize reduction 20, result has 35.5 percent of original size [2021-11-13 17:59:56,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 34 [2021-11-13 17:59:57,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:59:57,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:59:57,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:59:57,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 23 [2021-11-13 17:59:57,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:59:57,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:59:57,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 17:59:57,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:59:57,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:59:57,235 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-13 17:59:57,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 60 treesize of output 26 [2021-11-13 17:59:57,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:59:57,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:59:57,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 29 [2021-11-13 17:59:58,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:59:58,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 17:59:58,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:59:58,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:59:58,161 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-11-13 17:59:58,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 64 treesize of output 32 [2021-11-13 17:59:58,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:59:58,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 17:59:58,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:59:58,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:59:58,346 INFO L354 Elim1Store]: treesize reduction 23, result has 20.7 percent of original size [2021-11-13 17:59:58,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 35 [2021-11-13 17:59:58,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:59:58,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:59:58,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:59:58,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 23 [2021-11-13 17:59:58,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:59:58,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:59:58,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:59:58,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 20 [2021-11-13 18:00:00,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:00:00,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:00:00,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:00:00,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 27 [2021-11-13 18:00:00,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:00:00,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 57 treesize of output 39 [2021-11-13 18:00:00,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:00:00,501 INFO L354 Elim1Store]: treesize reduction 70, result has 1.4 percent of original size [2021-11-13 18:00:00,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 83 treesize of output 49 [2021-11-13 18:00:08,855 INFO L354 Elim1Store]: treesize reduction 108, result has 21.2 percent of original size [2021-11-13 18:00:08,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 86 treesize of output 78 [2021-11-13 18:00:11,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:00:11,333 INFO L354 Elim1Store]: treesize reduction 57, result has 19.7 percent of original size [2021-11-13 18:00:11,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 159 treesize of output 115 [2021-11-13 18:00:11,548 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-11-13 18:00:11,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 38 [2021-11-13 18:00:11,613 INFO L354 Elim1Store]: treesize reduction 65, result has 17.7 percent of original size [2021-11-13 18:00:11,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 62 treesize of output 42 [2021-11-13 18:00:14,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:00:14,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:00:14,067 INFO L354 Elim1Store]: treesize reduction 46, result has 2.1 percent of original size [2021-11-13 18:00:14,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 87 treesize of output 53 [2021-11-13 18:00:14,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:00:14,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:00:14,145 INFO L354 Elim1Store]: treesize reduction 33, result has 29.8 percent of original size [2021-11-13 18:00:14,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 83 treesize of output 63 [2021-11-13 18:00:14,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:00:14,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:00:14,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:00:14,244 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-11-13 18:00:14,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 83 treesize of output 49 [2021-11-13 18:00:14,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:00:14,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:00:14,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 25 [2021-11-13 18:00:14,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:00:14,699 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-13 18:00:14,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 57 [2021-11-13 18:00:14,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:00:14,743 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-13 18:00:14,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 49 [2021-11-13 18:00:14,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:00:14,783 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-13 18:00:14,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 49 [2021-11-13 18:00:15,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:00:15,653 INFO L354 Elim1Store]: treesize reduction 57, result has 19.7 percent of original size [2021-11-13 18:00:15,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 92 treesize of output 66