./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_advance_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/config/AutomizerReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_advance_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL --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 9a96b91703f0cc76adc9b0fdbd8386a96920c1be21a810b6415a59c2166f1461 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 05:27:21,906 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 05:27:21,913 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 05:27:21,982 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 05:27:21,986 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 05:27:21,993 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 05:27:21,996 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 05:27:22,002 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 05:27:22,005 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 05:27:22,015 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 05:27:22,017 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 05:27:22,020 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 05:27:22,020 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 05:27:22,024 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 05:27:22,028 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 05:27:22,032 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 05:27:22,040 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 05:27:22,041 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 05:27:22,044 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 05:27:22,047 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 05:27:22,055 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 05:27:22,056 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 05:27:22,057 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 05:27:22,058 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 05:27:22,063 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 05:27:22,063 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 05:27:22,064 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 05:27:22,065 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 05:27:22,065 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 05:27:22,067 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 05:27:22,067 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 05:27:22,068 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 05:27:22,069 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 05:27:22,070 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 05:27:22,071 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 05:27:22,072 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 05:27:22,073 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 05:27:22,073 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 05:27:22,074 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 05:27:22,075 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 05:27:22,076 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 05:27:22,078 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-19 05:27:22,140 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 05:27:22,140 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 05:27:22,140 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-19 05:27:22,141 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-19 05:27:22,141 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 05:27:22,142 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 05:27:22,142 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-19 05:27:22,143 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-19 05:27:22,143 INFO L138 SettingsManager]: * Use SBE=true [2021-11-19 05:27:22,143 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 05:27:22,143 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 05:27:22,144 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 05:27:22,144 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 05:27:22,144 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 05:27:22,144 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 05:27:22,145 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 05:27:22,145 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 05:27:22,145 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 05:27:22,146 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 05:27:22,146 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 05:27:22,146 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 05:27:22,146 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 05:27:22,147 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 05:27:22,147 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 05:27:22,147 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 05:27:22,148 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-19 05:27:22,148 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 05:27:22,148 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-19 05:27:22,149 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-19 05:27:22,149 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 05:27:22,149 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 05:27:22,149 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_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9a96b91703f0cc76adc9b0fdbd8386a96920c1be21a810b6415a59c2166f1461 [2021-11-19 05:27:22,462 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 05:27:22,507 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 05:27:22,511 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 05:27:22,512 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 05:27:22,513 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 05:27:22,515 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/../../sv-benchmarks/c/aws-c-common/aws_byte_buf_advance_harness.i [2021-11-19 05:27:22,603 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/data/b8c654301/46679f223ff7479280b724fb214a20c5/FLAG1814f4701 [2021-11-19 05:27:23,579 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 05:27:23,581 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/sv-benchmarks/c/aws-c-common/aws_byte_buf_advance_harness.i [2021-11-19 05:27:23,650 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/data/b8c654301/46679f223ff7479280b724fb214a20c5/FLAG1814f4701 [2021-11-19 05:27:23,983 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/data/b8c654301/46679f223ff7479280b724fb214a20c5 [2021-11-19 05:27:23,985 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 05:27:23,987 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 05:27:23,991 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 05:27:23,991 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 05:27:23,995 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 05:27:23,997 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:27:23" (1/1) ... [2021-11-19 05:27:24,000 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@dc303ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:27:23, skipping insertion in model container [2021-11-19 05:27:24,001 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:27:23" (1/1) ... [2021-11-19 05:27:24,012 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 05:27:24,204 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 05:27:24,564 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/sv-benchmarks/c/aws-c-common/aws_byte_buf_advance_harness.i[4494,4507] [2021-11-19 05:27:24,572 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/sv-benchmarks/c/aws-c-common/aws_byte_buf_advance_harness.i[4554,4567] [2021-11-19 05:27:24,598 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-19 05:27:24,604 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-19 05:27:25,744 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 05:27:25,745 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 05:27:25,746 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 05:27:25,747 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 05:27:25,749 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 05:27:25,780 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 05:27:25,781 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 05:27:25,784 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 05:27:25,785 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 05:27:26,370 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-19 05:27:26,372 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-19 05:27:26,375 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-19 05:27:26,377 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-19 05:27:26,385 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-19 05:27:26,390 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-19 05:27:26,392 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-19 05:27:26,393 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-19 05:27:26,397 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-19 05:27:26,401 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-19 05:27:26,626 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-19 05:27:26,775 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 05:27:26,776 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 05:27:26,923 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 05:27:27,013 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 05:27:27,043 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/sv-benchmarks/c/aws-c-common/aws_byte_buf_advance_harness.i[4494,4507] [2021-11-19 05:27:27,050 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/sv-benchmarks/c/aws-c-common/aws_byte_buf_advance_harness.i[4554,4567] [2021-11-19 05:27:27,052 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-19 05:27:27,055 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-19 05:27:27,126 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 05:27:27,126 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 05:27:27,128 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 05:27:27,129 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 05:27:27,129 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 05:27:27,151 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 05:27:27,153 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 05:27:27,154 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 05:27:27,155 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 05:27:27,219 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-19 05:27:27,220 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-19 05:27:27,221 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-19 05:27:27,222 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-19 05:27:27,223 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-19 05:27:27,224 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-19 05:27:27,224 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-19 05:27:27,225 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-19 05:27:27,225 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-19 05:27:27,232 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-19 05:27:27,272 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-19 05:27:27,367 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 05:27:27,367 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 05:27:27,485 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 05:27:27,753 INFO L208 MainTranslator]: Completed translation [2021-11-19 05:27:27,753 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:27:27 WrapperNode [2021-11-19 05:27:27,754 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 05:27:27,755 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 05:27:27,755 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 05:27:27,756 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 05:27:27,764 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:27:27" (1/1) ... [2021-11-19 05:27:27,959 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:27:27" (1/1) ... [2021-11-19 05:27:28,069 INFO L137 Inliner]: procedures = 693, calls = 2679, calls flagged for inlining = 60, calls inlined = 8, statements flattened = 968 [2021-11-19 05:27:28,070 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 05:27:28,071 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 05:27:28,072 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 05:27:28,072 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 05:27:28,083 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:27:27" (1/1) ... [2021-11-19 05:27:28,084 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:27:27" (1/1) ... [2021-11-19 05:27:28,096 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:27:27" (1/1) ... [2021-11-19 05:27:28,097 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:27:27" (1/1) ... [2021-11-19 05:27:28,164 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:27:27" (1/1) ... [2021-11-19 05:27:28,185 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:27:27" (1/1) ... [2021-11-19 05:27:28,207 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:27:27" (1/1) ... [2021-11-19 05:27:28,233 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 05:27:28,235 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 05:27:28,235 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 05:27:28,235 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 05:27:28,237 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:27:27" (1/1) ... [2021-11-19 05:27:28,250 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 05:27:28,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:27:28,280 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 05:27:28,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 05:27:28,351 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_valid [2021-11-19 05:27:28,351 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_valid [2021-11-19 05:27:28,351 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-19 05:27:28,352 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-11-19 05:27:28,352 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-11-19 05:27:28,353 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-19 05:27:28,396 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-19 05:27:28,396 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-19 05:27:28,396 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-19 05:27:28,396 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 05:27:28,396 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-19 05:27:28,396 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_byte_buf_has_allocated_buffer_member [2021-11-19 05:27:28,396 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_byte_buf_has_allocated_buffer_member [2021-11-19 05:27:28,397 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 05:27:28,397 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 05:27:28,397 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-11-19 05:27:28,397 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-11-19 05:27:28,397 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2021-11-19 05:27:28,397 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2021-11-19 05:27:28,397 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-19 05:27:28,397 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-19 05:27:28,398 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 05:27:28,398 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-19 05:27:28,398 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-19 05:27:28,398 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2021-11-19 05:27:28,398 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2021-11-19 05:27:28,398 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_bounded [2021-11-19 05:27:28,398 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_bounded [2021-11-19 05:27:28,399 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-19 05:27:28,399 INFO L130 BoogieDeclarations]: Found specification of procedure memset_impl [2021-11-19 05:27:28,399 INFO L138 BoogieDeclarations]: Found implementation of procedure memset_impl [2021-11-19 05:27:28,399 INFO L130 BoogieDeclarations]: Found specification of procedure my_memset [2021-11-19 05:27:28,399 INFO L138 BoogieDeclarations]: Found implementation of procedure my_memset [2021-11-19 05:27:28,399 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-19 05:27:28,852 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 05:27:28,868 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 05:27:30,893 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 05:27:30,906 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 05:27:30,907 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-19 05:27:30,910 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:27:30 BoogieIcfgContainer [2021-11-19 05:27:30,910 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 05:27:30,912 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 05:27:30,913 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 05:27:30,917 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 05:27:30,917 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:27:23" (1/3) ... [2021-11-19 05:27:30,918 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52c3d1a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:27:30, skipping insertion in model container [2021-11-19 05:27:30,919 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:27:27" (2/3) ... [2021-11-19 05:27:30,919 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52c3d1a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:27:30, skipping insertion in model container [2021-11-19 05:27:30,919 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:27:30" (3/3) ... [2021-11-19 05:27:30,921 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_byte_buf_advance_harness.i [2021-11-19 05:27:30,928 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 05:27:30,929 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 05:27:31,012 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 05:27:31,032 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 [2021-11-19 05:27:31,033 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 05:27:31,073 INFO L276 IsEmpty]: Start isEmpty. Operand has 173 states, 106 states have (on average 1.2264150943396226) internal successors, (130), 106 states have internal predecessors, (130), 55 states have call successors, (55), 11 states have call predecessors, (55), 11 states have return successors, (55), 55 states have call predecessors, (55), 55 states have call successors, (55) [2021-11-19 05:27:31,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-19 05:27:31,092 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:27:31,093 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 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] [2021-11-19 05:27:31,094 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:27:31,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:27:31,099 INFO L85 PathProgramCache]: Analyzing trace with hash -1247030305, now seen corresponding path program 1 times [2021-11-19 05:27:31,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:27:31,111 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572661212] [2021-11-19 05:27:31,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:27:31,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:27:31,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:31,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 05:27:31,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:31,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-19 05:27:31,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:31,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 05:27:31,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:31,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:27:31,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:32,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 05:27:32,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:32,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:27:32,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:32,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-19 05:27:32,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:32,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-19 05:27:32,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:32,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-19 05:27:32,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:32,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-19 05:27:32,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:32,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-11-19 05:27:32,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:32,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-19 05:27:32,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:32,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-19 05:27:32,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:32,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-11-19 05:27:32,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:32,305 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-19 05:27:32,306 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:27:32,307 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572661212] [2021-11-19 05:27:32,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572661212] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:27:32,308 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:27:32,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 05:27:32,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688928227] [2021-11-19 05:27:32,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:27:32,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 05:27:32,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:27:32,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 05:27:32,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 05:27:32,370 INFO L87 Difference]: Start difference. First operand has 173 states, 106 states have (on average 1.2264150943396226) internal successors, (130), 106 states have internal predecessors, (130), 55 states have call successors, (55), 11 states have call predecessors, (55), 11 states have return successors, (55), 55 states have call predecessors, (55), 55 states have call successors, (55) Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 2 states have internal predecessors, (34), 2 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-19 05:27:33,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:27:33,077 INFO L93 Difference]: Finished difference Result 349 states and 522 transitions. [2021-11-19 05:27:33,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 05:27:33,080 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 2 states have internal predecessors, (34), 2 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 89 [2021-11-19 05:27:33,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:27:33,099 INFO L225 Difference]: With dead ends: 349 [2021-11-19 05:27:33,100 INFO L226 Difference]: Without dead ends: 175 [2021-11-19 05:27:33,113 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 05:27:33,124 INFO L933 BasicCegarLoop]: 217 mSDtfsCounter, 119 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 05:27:33,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 278 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 05:27:33,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-11-19 05:27:33,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 168. [2021-11-19 05:27:33,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 101 states have (on average 1.198019801980198) internal successors, (121), 102 states have internal predecessors, (121), 55 states have call successors, (55), 11 states have call predecessors, (55), 11 states have return successors, (54), 54 states have call predecessors, (54), 54 states have call successors, (54) [2021-11-19 05:27:33,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 230 transitions. [2021-11-19 05:27:33,226 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 230 transitions. Word has length 89 [2021-11-19 05:27:33,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:27:33,228 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 230 transitions. [2021-11-19 05:27:33,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 2 states have internal predecessors, (34), 2 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-19 05:27:33,229 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 230 transitions. [2021-11-19 05:27:33,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-19 05:27:33,237 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:27:33,237 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 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] [2021-11-19 05:27:33,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-19 05:27:33,238 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:27:33,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:27:33,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1477386906, now seen corresponding path program 1 times [2021-11-19 05:27:33,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:27:33,240 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440502630] [2021-11-19 05:27:33,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:27:33,241 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:27:33,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:33,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 05:27:33,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:33,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-19 05:27:33,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:33,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 05:27:33,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:33,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:27:33,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:33,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 05:27:33,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:33,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:27:33,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:33,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-19 05:27:33,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:33,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-19 05:27:33,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:33,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-19 05:27:33,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:33,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-19 05:27:33,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:33,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-11-19 05:27:33,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:33,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-19 05:27:33,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:33,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-19 05:27:33,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:33,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-19 05:27:33,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:33,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-11-19 05:27:33,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:33,943 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-19 05:27:33,943 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:27:33,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440502630] [2021-11-19 05:27:33,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440502630] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:27:33,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786950050] [2021-11-19 05:27:33,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:27:33,945 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:27:33,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:27:33,947 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:27:33,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-19 05:27:34,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:34,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 2608 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 05:27:34,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:27:35,141 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-19 05:27:35,141 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 05:27:35,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786950050] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:27:35,142 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 05:27:35,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2021-11-19 05:27:35,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052278355] [2021-11-19 05:27:35,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:27:35,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 05:27:35,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:27:35,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 05:27:35,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-11-19 05:27:35,145 INFO L87 Difference]: Start difference. First operand 168 states and 230 transitions. Second operand has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-19 05:27:35,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:27:35,746 INFO L93 Difference]: Finished difference Result 332 states and 462 transitions. [2021-11-19 05:27:35,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 05:27:35,752 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 96 [2021-11-19 05:27:35,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:27:35,761 INFO L225 Difference]: With dead ends: 332 [2021-11-19 05:27:35,762 INFO L226 Difference]: Without dead ends: 171 [2021-11-19 05:27:35,764 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-11-19 05:27:35,774 INFO L933 BasicCegarLoop]: 170 mSDtfsCounter, 259 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 590 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 05:27:35,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 590 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 05:27:35,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-11-19 05:27:35,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2021-11-19 05:27:35,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 103 states have (on average 1.1941747572815533) internal successors, (123), 105 states have internal predecessors, (123), 55 states have call successors, (55), 11 states have call predecessors, (55), 12 states have return successors, (63), 54 states have call predecessors, (63), 54 states have call successors, (63) [2021-11-19 05:27:35,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 241 transitions. [2021-11-19 05:27:35,849 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 241 transitions. Word has length 96 [2021-11-19 05:27:35,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:27:35,850 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 241 transitions. [2021-11-19 05:27:35,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-19 05:27:35,851 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 241 transitions. [2021-11-19 05:27:35,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-19 05:27:35,860 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:27:35,860 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:27:35,911 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-19 05:27:36,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:27:36,075 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:27:36,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:27:36,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1893468965, now seen corresponding path program 1 times [2021-11-19 05:27:36,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:27:36,076 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141473989] [2021-11-19 05:27:36,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:27:36,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:27:36,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:36,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 05:27:36,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:36,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-19 05:27:36,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:36,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 05:27:36,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:36,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:27:36,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:36,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 05:27:36,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:36,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:27:36,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:36,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-19 05:27:36,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:36,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-19 05:27:36,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:36,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-19 05:27:36,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:36,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-11-19 05:27:36,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:36,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-19 05:27:36,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:36,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-19 05:27:36,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:36,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-19 05:27:36,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:36,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-19 05:27:36,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:36,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-11-19 05:27:36,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:36,709 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-19 05:27:36,710 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:27:36,710 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141473989] [2021-11-19 05:27:36,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141473989] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:27:36,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060327204] [2021-11-19 05:27:36,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:27:36,711 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:27:36,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:27:36,716 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:27:36,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-19 05:27:37,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:37,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 2625 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 05:27:37,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:27:37,878 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-19 05:27:37,879 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 05:27:37,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060327204] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:27:37,879 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 05:27:37,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2021-11-19 05:27:37,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294084000] [2021-11-19 05:27:37,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:27:37,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 05:27:37,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:27:37,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 05:27:37,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-11-19 05:27:37,885 INFO L87 Difference]: Start difference. First operand 171 states and 241 transitions. Second operand has 7 states, 6 states have (on average 8.833333333333334) internal successors, (53), 7 states have internal predecessors, (53), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-19 05:27:38,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:27:38,526 INFO L93 Difference]: Finished difference Result 293 states and 416 transitions. [2021-11-19 05:27:38,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 05:27:38,527 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 8.833333333333334) internal successors, (53), 7 states have internal predecessors, (53), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 4 states have call successors, (15) Word has length 102 [2021-11-19 05:27:38,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:27:38,530 INFO L225 Difference]: With dead ends: 293 [2021-11-19 05:27:38,530 INFO L226 Difference]: Without dead ends: 171 [2021-11-19 05:27:38,531 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-11-19 05:27:38,535 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 299 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 713 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 05:27:38,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [299 Valid, 713 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 05:27:38,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-11-19 05:27:38,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2021-11-19 05:27:38,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 103 states have (on average 1.1941747572815533) internal successors, (123), 105 states have internal predecessors, (123), 55 states have call successors, (55), 11 states have call predecessors, (55), 12 states have return successors, (60), 54 states have call predecessors, (60), 54 states have call successors, (60) [2021-11-19 05:27:38,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 238 transitions. [2021-11-19 05:27:38,588 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 238 transitions. Word has length 102 [2021-11-19 05:27:38,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:27:38,589 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 238 transitions. [2021-11-19 05:27:38,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 8.833333333333334) internal successors, (53), 7 states have internal predecessors, (53), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-19 05:27:38,590 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 238 transitions. [2021-11-19 05:27:38,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-19 05:27:38,599 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:27:38,599 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 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] [2021-11-19 05:27:38,648 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-19 05:27:38,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:27:38,822 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:27:38,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:27:38,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1871994096, now seen corresponding path program 2 times [2021-11-19 05:27:38,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:27:38,823 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329891896] [2021-11-19 05:27:38,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:27:38,823 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:27:38,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:39,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 05:27:39,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:39,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-19 05:27:39,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:39,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 05:27:39,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:39,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:27:39,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:39,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 05:27:39,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:39,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:27:39,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:39,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-19 05:27:39,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:39,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-19 05:27:39,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:39,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-19 05:27:39,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:39,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-11-19 05:27:39,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:39,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-19 05:27:39,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:39,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-19 05:27:39,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:39,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-11-19 05:27:39,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:39,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-11-19 05:27:39,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:39,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-11-19 05:27:39,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:39,539 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-11-19 05:27:39,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:27:39,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329891896] [2021-11-19 05:27:39,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329891896] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:27:39,540 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889965024] [2021-11-19 05:27:39,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 05:27:39,540 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:27:39,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:27:39,542 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:27:39,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-19 05:27:40,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-19 05:27:40,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:27:40,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 2326 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 05:27:40,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:27:40,590 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-19 05:27:40,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:27:41,016 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-11-19 05:27:41,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889965024] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 05:27:41,017 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-19 05:27:41,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 6] total 14 [2021-11-19 05:27:41,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369253470] [2021-11-19 05:27:41,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:27:41,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 05:27:41,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:27:41,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 05:27:41,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-11-19 05:27:41,019 INFO L87 Difference]: Start difference. First operand 171 states and 238 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-19 05:27:41,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:27:41,223 INFO L93 Difference]: Finished difference Result 256 states and 358 transitions. [2021-11-19 05:27:41,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 05:27:41,224 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 108 [2021-11-19 05:27:41,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:27:41,227 INFO L225 Difference]: With dead ends: 256 [2021-11-19 05:27:41,228 INFO L226 Difference]: Without dead ends: 171 [2021-11-19 05:27:41,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-11-19 05:27:41,230 INFO L933 BasicCegarLoop]: 215 mSDtfsCounter, 229 mSDsluCounter, 599 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 814 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 05:27:41,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 814 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 05:27:41,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-11-19 05:27:41,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2021-11-19 05:27:41,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 103 states have (on average 1.1941747572815533) internal successors, (123), 105 states have internal predecessors, (123), 55 states have call successors, (55), 11 states have call predecessors, (55), 12 states have return successors, (59), 54 states have call predecessors, (59), 54 states have call successors, (59) [2021-11-19 05:27:41,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 237 transitions. [2021-11-19 05:27:41,253 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 237 transitions. Word has length 108 [2021-11-19 05:27:41,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:27:41,254 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 237 transitions. [2021-11-19 05:27:41,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-19 05:27:41,255 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 237 transitions. [2021-11-19 05:27:41,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-19 05:27:41,257 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:27:41,258 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:27:41,308 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-19 05:27:41,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:27:41,481 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:27:41,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:27:41,482 INFO L85 PathProgramCache]: Analyzing trace with hash -225220613, now seen corresponding path program 3 times [2021-11-19 05:27:41,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:27:41,482 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590047932] [2021-11-19 05:27:41,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:27:41,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:27:41,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:41,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 05:27:41,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:41,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-19 05:27:41,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:41,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 05:27:41,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:41,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:27:41,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:41,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 05:27:41,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:41,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:27:41,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:41,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-19 05:27:41,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:41,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-19 05:27:41,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:41,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-19 05:27:41,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:41,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-11-19 05:27:41,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:41,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-19 05:27:41,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:41,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-19 05:27:41,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:41,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-11-19 05:27:41,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:42,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-11-19 05:27:42,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:42,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-11-19 05:27:42,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:42,029 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-19 05:27:42,029 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:27:42,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590047932] [2021-11-19 05:27:42,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590047932] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:27:42,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546646938] [2021-11-19 05:27:42,031 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 05:27:42,032 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:27:42,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:27:42,034 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:27:42,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-19 05:27:42,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2021-11-19 05:27:42,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:27:42,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 2343 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-19 05:27:42,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:27:42,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:27:42,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:27:42,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:27:42,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 31 [2021-11-19 05:27:43,710 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-19 05:27:43,710 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 05:27:43,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546646938] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:27:43,711 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 05:27:43,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 15 [2021-11-19 05:27:43,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986615154] [2021-11-19 05:27:43,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:27:43,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 05:27:43,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:27:43,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 05:27:43,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-11-19 05:27:43,714 INFO L87 Difference]: Start difference. First operand 171 states and 237 transitions. Second operand has 9 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 3 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 05:27:43,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:27:43,826 INFO L93 Difference]: Finished difference Result 282 states and 390 transitions. [2021-11-19 05:27:43,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 05:27:43,831 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 3 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 114 [2021-11-19 05:27:43,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:27:43,840 INFO L225 Difference]: With dead ends: 282 [2021-11-19 05:27:43,841 INFO L226 Difference]: Without dead ends: 190 [2021-11-19 05:27:43,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-11-19 05:27:43,844 INFO L933 BasicCegarLoop]: 249 mSDtfsCounter, 37 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 722 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 05:27:43,845 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 722 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 59 Unchecked, 0.0s Time] [2021-11-19 05:27:43,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-11-19 05:27:43,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 188. [2021-11-19 05:27:43,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 118 states have (on average 1.2033898305084745) internal successors, (142), 121 states have internal predecessors, (142), 56 states have call successors, (56), 12 states have call predecessors, (56), 13 states have return successors, (61), 54 states have call predecessors, (61), 55 states have call successors, (61) [2021-11-19 05:27:43,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 259 transitions. [2021-11-19 05:27:43,878 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 259 transitions. Word has length 114 [2021-11-19 05:27:43,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:27:43,879 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 259 transitions. [2021-11-19 05:27:43,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 3 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 05:27:43,880 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 259 transitions. [2021-11-19 05:27:43,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-19 05:27:43,888 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:27:43,888 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:27:43,940 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-19 05:27:44,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:27:44,114 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:27:44,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:27:44,115 INFO L85 PathProgramCache]: Analyzing trace with hash -812026627, now seen corresponding path program 1 times [2021-11-19 05:27:44,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:27:44,115 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585761644] [2021-11-19 05:27:44,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:27:44,115 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:27:44,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:44,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 05:27:44,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:44,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-19 05:27:44,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:44,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 05:27:44,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:44,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:27:44,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:44,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 05:27:44,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:44,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:27:44,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:44,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-19 05:27:44,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:44,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-19 05:27:44,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:44,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-19 05:27:44,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:44,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-11-19 05:27:44,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:44,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-19 05:27:44,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:44,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-19 05:27:44,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:44,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-11-19 05:27:44,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:44,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-11-19 05:27:44,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:44,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-11-19 05:27:44,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:44,622 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-19 05:27:44,622 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:27:44,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585761644] [2021-11-19 05:27:44,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585761644] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:27:44,623 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964621500] [2021-11-19 05:27:44,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:27:44,623 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:27:44,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:27:44,625 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:27:44,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-19 05:27:45,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:45,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 2656 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 05:27:45,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:27:45,535 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-11-19 05:27:45,535 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 05:27:45,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964621500] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:27:45,536 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 05:27:45,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2021-11-19 05:27:45,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819232926] [2021-11-19 05:27:45,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:27:45,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 05:27:45,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:27:45,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 05:27:45,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-19 05:27:45,538 INFO L87 Difference]: Start difference. First operand 188 states and 259 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2021-11-19 05:27:45,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:27:45,658 INFO L93 Difference]: Finished difference Result 393 states and 553 transitions. [2021-11-19 05:27:45,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 05:27:45,659 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) Word has length 114 [2021-11-19 05:27:45,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:27:45,662 INFO L225 Difference]: With dead ends: 393 [2021-11-19 05:27:45,662 INFO L226 Difference]: Without dead ends: 212 [2021-11-19 05:27:45,663 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-11-19 05:27:45,665 INFO L933 BasicCegarLoop]: 256 mSDtfsCounter, 28 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 718 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 05:27:45,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 718 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 05:27:45,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-11-19 05:27:45,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 190. [2021-11-19 05:27:45,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 120 states have (on average 1.1916666666666667) internal successors, (143), 123 states have internal predecessors, (143), 56 states have call successors, (56), 12 states have call predecessors, (56), 13 states have return successors, (61), 54 states have call predecessors, (61), 55 states have call successors, (61) [2021-11-19 05:27:45,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 260 transitions. [2021-11-19 05:27:45,685 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 260 transitions. Word has length 114 [2021-11-19 05:27:45,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:27:45,685 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 260 transitions. [2021-11-19 05:27:45,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2021-11-19 05:27:45,686 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 260 transitions. [2021-11-19 05:27:45,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-19 05:27:45,688 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:27:45,689 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:27:45,733 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-19 05:27:45,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:27:45,902 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:27:45,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:27:45,903 INFO L85 PathProgramCache]: Analyzing trace with hash -110962049, now seen corresponding path program 1 times [2021-11-19 05:27:45,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:27:45,903 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820927387] [2021-11-19 05:27:45,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:27:45,903 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:27:45,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:46,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 05:27:46,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:46,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-19 05:27:46,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:46,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 05:27:46,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:46,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:27:46,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:46,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 05:27:46,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:46,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:27:46,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:46,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-19 05:27:46,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:46,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-19 05:27:46,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:46,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-19 05:27:46,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:46,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-11-19 05:27:46,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:46,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-19 05:27:46,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:46,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-19 05:27:46,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:46,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-11-19 05:27:46,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:46,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-11-19 05:27:46,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:46,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-11-19 05:27:46,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:46,355 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-19 05:27:46,356 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:27:46,356 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820927387] [2021-11-19 05:27:46,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820927387] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:27:46,356 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493013156] [2021-11-19 05:27:46,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:27:46,357 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:27:46,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:27:46,362 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:27:46,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-19 05:27:46,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:46,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 2651 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 05:27:46,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:27:47,197 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-11-19 05:27:47,198 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 05:27:47,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493013156] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:27:47,198 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 05:27:47,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2021-11-19 05:27:47,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617562881] [2021-11-19 05:27:47,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:27:47,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 05:27:47,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:27:47,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 05:27:47,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-19 05:27:47,201 INFO L87 Difference]: Start difference. First operand 190 states and 260 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2021-11-19 05:27:47,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:27:47,248 INFO L93 Difference]: Finished difference Result 381 states and 533 transitions. [2021-11-19 05:27:47,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 05:27:47,249 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) Word has length 114 [2021-11-19 05:27:47,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:27:47,252 INFO L225 Difference]: With dead ends: 381 [2021-11-19 05:27:47,252 INFO L226 Difference]: Without dead ends: 198 [2021-11-19 05:27:47,253 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-11-19 05:27:47,255 INFO L933 BasicCegarLoop]: 241 mSDtfsCounter, 20 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 682 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 05:27:47,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 682 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 05:27:47,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-11-19 05:27:47,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 182. [2021-11-19 05:27:47,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 113 states have (on average 1.1946902654867257) internal successors, (135), 115 states have internal predecessors, (135), 56 states have call successors, (56), 12 states have call predecessors, (56), 12 states have return successors, (60), 54 states have call predecessors, (60), 55 states have call successors, (60) [2021-11-19 05:27:47,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 251 transitions. [2021-11-19 05:27:47,277 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 251 transitions. Word has length 114 [2021-11-19 05:27:47,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:27:47,278 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 251 transitions. [2021-11-19 05:27:47,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2021-11-19 05:27:47,279 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 251 transitions. [2021-11-19 05:27:47,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-19 05:27:47,281 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:27:47,281 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:27:47,334 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-19 05:27:47,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-19 05:27:47,506 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:27:47,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:27:47,507 INFO L85 PathProgramCache]: Analyzing trace with hash 2075601977, now seen corresponding path program 1 times [2021-11-19 05:27:47,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:27:47,507 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484372082] [2021-11-19 05:27:47,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:27:47,507 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:27:47,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:47,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 05:27:47,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:47,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-19 05:27:47,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:47,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 05:27:47,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:47,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:27:47,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:47,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 05:27:47,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:47,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:27:47,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:47,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-19 05:27:47,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:47,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-19 05:27:47,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:47,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-19 05:27:47,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:47,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-11-19 05:27:47,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:47,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-19 05:27:47,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:47,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-19 05:27:47,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:47,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-11-19 05:27:47,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:47,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-11-19 05:27:47,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:47,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-11-19 05:27:47,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:48,005 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-19 05:27:48,005 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:27:48,008 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484372082] [2021-11-19 05:27:48,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484372082] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:27:48,008 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051937703] [2021-11-19 05:27:48,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:27:48,009 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:27:48,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:27:48,010 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:27:48,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-19 05:27:48,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:48,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 2659 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 05:27:48,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:27:49,108 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-19 05:27:49,108 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 05:27:49,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051937703] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:27:49,108 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 05:27:49,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2021-11-19 05:27:49,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278658050] [2021-11-19 05:27:49,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:27:49,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 05:27:49,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:27:49,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 05:27:49,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-11-19 05:27:49,112 INFO L87 Difference]: Start difference. First operand 182 states and 251 transitions. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-19 05:27:49,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:27:49,634 INFO L93 Difference]: Finished difference Result 324 states and 450 transitions. [2021-11-19 05:27:49,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 05:27:49,635 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 114 [2021-11-19 05:27:49,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:27:49,638 INFO L225 Difference]: With dead ends: 324 [2021-11-19 05:27:49,638 INFO L226 Difference]: Without dead ends: 179 [2021-11-19 05:27:49,640 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-11-19 05:27:49,640 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 298 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 575 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 05:27:49,641 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [298 Valid, 575 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 05:27:49,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-11-19 05:27:49,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2021-11-19 05:27:49,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 111 states have (on average 1.1891891891891893) internal successors, (132), 112 states have internal predecessors, (132), 56 states have call successors, (56), 12 states have call predecessors, (56), 11 states have return successors, (55), 54 states have call predecessors, (55), 55 states have call successors, (55) [2021-11-19 05:27:49,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 243 transitions. [2021-11-19 05:27:49,658 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 243 transitions. Word has length 114 [2021-11-19 05:27:49,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:27:49,658 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 243 transitions. [2021-11-19 05:27:49,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-19 05:27:49,659 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 243 transitions. [2021-11-19 05:27:49,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-19 05:27:49,661 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:27:49,661 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2021-11-19 05:27:49,706 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-19 05:27:49,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-19 05:27:49,874 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:27:49,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:27:49,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1603675154, now seen corresponding path program 1 times [2021-11-19 05:27:49,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:27:49,875 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223363976] [2021-11-19 05:27:49,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:27:49,876 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:27:50,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:50,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 05:27:50,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:50,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-19 05:27:50,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:50,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 05:27:50,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:50,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:27:50,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:50,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 05:27:50,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:50,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:27:50,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:50,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-19 05:27:50,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:50,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-19 05:27:50,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:50,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-19 05:27:50,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:50,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-11-19 05:27:50,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:50,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-19 05:27:50,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:50,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-19 05:27:50,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:50,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-11-19 05:27:50,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:50,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-19 05:27:50,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:50,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-11-19 05:27:50,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:50,500 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-11-19 05:27:50,500 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:27:50,501 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223363976] [2021-11-19 05:27:50,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223363976] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:27:50,501 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:27:50,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-19 05:27:50,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073737533] [2021-11-19 05:27:50,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:27:50,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 05:27:50,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:27:50,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 05:27:50,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-11-19 05:27:50,508 INFO L87 Difference]: Start difference. First operand 179 states and 243 transitions. Second operand has 10 states, 9 states have (on average 5.111111111111111) internal successors, (46), 6 states have internal predecessors, (46), 2 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2021-11-19 05:27:51,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:27:51,535 INFO L93 Difference]: Finished difference Result 198 states and 273 transitions. [2021-11-19 05:27:51,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 05:27:51,536 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.111111111111111) internal successors, (46), 6 states have internal predecessors, (46), 2 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) Word has length 120 [2021-11-19 05:27:51,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:27:51,539 INFO L225 Difference]: With dead ends: 198 [2021-11-19 05:27:51,539 INFO L226 Difference]: Without dead ends: 196 [2021-11-19 05:27:51,540 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-11-19 05:27:51,540 INFO L933 BasicCegarLoop]: 213 mSDtfsCounter, 141 mSDsluCounter, 1057 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 1270 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 05:27:51,541 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 1270 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 476 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-19 05:27:51,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-11-19 05:27:51,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 188. [2021-11-19 05:27:51,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 117 states have (on average 1.1794871794871795) internal successors, (138), 119 states have internal predecessors, (138), 57 states have call successors, (57), 13 states have call predecessors, (57), 13 states have return successors, (67), 55 states have call predecessors, (67), 56 states have call successors, (67) [2021-11-19 05:27:51,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 262 transitions. [2021-11-19 05:27:51,563 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 262 transitions. Word has length 120 [2021-11-19 05:27:51,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:27:51,564 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 262 transitions. [2021-11-19 05:27:51,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.111111111111111) internal successors, (46), 6 states have internal predecessors, (46), 2 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2021-11-19 05:27:51,564 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 262 transitions. [2021-11-19 05:27:51,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-19 05:27:51,567 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:27:51,567 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:27:51,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-19 05:27:51,568 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:27:51,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:27:51,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1437147720, now seen corresponding path program 1 times [2021-11-19 05:27:51,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:27:51,569 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239850716] [2021-11-19 05:27:51,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:27:51,569 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:27:51,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:52,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 05:27:52,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:52,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-19 05:27:52,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:52,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 05:27:52,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:52,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:27:52,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:52,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 05:27:52,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:52,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:27:52,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:52,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-19 05:27:52,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:52,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-19 05:27:52,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:52,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-19 05:27:52,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:52,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-11-19 05:27:52,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:52,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-19 05:27:52,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:52,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-19 05:27:52,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:52,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-11-19 05:27:52,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:52,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-19 05:27:52,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:52,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-11-19 05:27:52,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:52,290 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-11-19 05:27:52,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:27:52,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239850716] [2021-11-19 05:27:52,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239850716] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:27:52,291 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:27:52,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-19 05:27:52,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69465856] [2021-11-19 05:27:52,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:27:52,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 05:27:52,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:27:52,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 05:27:52,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-19 05:27:52,293 INFO L87 Difference]: Start difference. First operand 188 states and 262 transitions. Second operand has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 5 states have internal predecessors, (55), 2 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2021-11-19 05:27:54,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:27:54,930 INFO L93 Difference]: Finished difference Result 395 states and 567 transitions. [2021-11-19 05:27:54,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 05:27:54,931 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 5 states have internal predecessors, (55), 2 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) Word has length 124 [2021-11-19 05:27:54,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:27:54,934 INFO L225 Difference]: With dead ends: 395 [2021-11-19 05:27:54,934 INFO L226 Difference]: Without dead ends: 214 [2021-11-19 05:27:54,936 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-11-19 05:27:54,937 INFO L933 BasicCegarLoop]: 210 mSDtfsCounter, 194 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 628 SdHoareTripleChecker+Invalid, 519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-19 05:27:54,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 628 Invalid, 519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-11-19 05:27:54,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-11-19 05:27:54,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 191. [2021-11-19 05:27:54,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 120 states have (on average 1.175) internal successors, (141), 122 states have internal predecessors, (141), 57 states have call successors, (57), 13 states have call predecessors, (57), 13 states have return successors, (67), 55 states have call predecessors, (67), 56 states have call successors, (67) [2021-11-19 05:27:54,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 265 transitions. [2021-11-19 05:27:54,960 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 265 transitions. Word has length 124 [2021-11-19 05:27:54,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:27:54,961 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 265 transitions. [2021-11-19 05:27:54,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 5 states have internal predecessors, (55), 2 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2021-11-19 05:27:54,962 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 265 transitions. [2021-11-19 05:27:54,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-19 05:27:54,964 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:27:54,965 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:27:54,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-19 05:27:54,965 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:27:54,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:27:54,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1178982282, now seen corresponding path program 1 times [2021-11-19 05:27:54,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:27:54,967 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655256787] [2021-11-19 05:27:54,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:27:54,967 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:27:55,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:55,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 05:27:55,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:55,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-19 05:27:55,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:55,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 05:27:55,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:55,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:27:55,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:55,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 05:27:55,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:55,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:27:55,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:55,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-19 05:27:55,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:55,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-19 05:27:55,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:55,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-19 05:27:55,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:55,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-11-19 05:27:55,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:55,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-19 05:27:55,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:55,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-19 05:27:55,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:55,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-11-19 05:27:55,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:55,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-19 05:27:55,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:55,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-11-19 05:27:55,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:55,786 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-19 05:27:55,787 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:27:55,787 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655256787] [2021-11-19 05:27:55,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655256787] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:27:55,787 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:27:55,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-19 05:27:55,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267621965] [2021-11-19 05:27:55,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:27:55,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 05:27:55,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:27:55,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 05:27:55,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-11-19 05:27:55,789 INFO L87 Difference]: Start difference. First operand 191 states and 265 transitions. Second operand has 11 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 3 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 05:27:58,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:27:58,017 INFO L93 Difference]: Finished difference Result 356 states and 516 transitions. [2021-11-19 05:27:58,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 05:27:58,018 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 3 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 124 [2021-11-19 05:27:58,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:27:58,021 INFO L225 Difference]: With dead ends: 356 [2021-11-19 05:27:58,022 INFO L226 Difference]: Without dead ends: 261 [2021-11-19 05:27:58,023 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-11-19 05:27:58,024 INFO L933 BasicCegarLoop]: 266 mSDtfsCounter, 248 mSDsluCounter, 728 mSDsCounter, 0 mSdLazyCounter, 653 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 994 SdHoareTripleChecker+Invalid, 791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-19 05:27:58,025 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [280 Valid, 994 Invalid, 791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 653 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-19 05:27:58,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-11-19 05:27:58,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 201. [2021-11-19 05:27:58,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 129 states have (on average 1.1705426356589148) internal successors, (151), 132 states have internal predecessors, (151), 57 states have call successors, (57), 13 states have call predecessors, (57), 14 states have return successors, (78), 55 states have call predecessors, (78), 56 states have call successors, (78) [2021-11-19 05:27:58,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 286 transitions. [2021-11-19 05:27:58,053 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 286 transitions. Word has length 124 [2021-11-19 05:27:58,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:27:58,054 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 286 transitions. [2021-11-19 05:27:58,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 3 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 05:27:58,055 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 286 transitions. [2021-11-19 05:27:58,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-19 05:27:58,057 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:27:58,058 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:27:58,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-19 05:27:58,058 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:27:58,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:27:58,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1836121336, now seen corresponding path program 1 times [2021-11-19 05:27:58,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:27:58,059 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107203969] [2021-11-19 05:27:58,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:27:58,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:27:58,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:58,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 05:27:58,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:58,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-19 05:27:58,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:58,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 05:27:58,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:58,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:27:58,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:58,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 05:27:58,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:58,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:27:58,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:59,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-19 05:27:59,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:59,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-19 05:27:59,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:59,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-19 05:27:59,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:59,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-11-19 05:27:59,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:59,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-19 05:27:59,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:59,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-19 05:27:59,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:59,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-11-19 05:27:59,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:59,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-19 05:27:59,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:59,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-11-19 05:27:59,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:59,250 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-19 05:27:59,250 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:27:59,250 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107203969] [2021-11-19 05:27:59,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107203969] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:27:59,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307880864] [2021-11-19 05:27:59,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:27:59,251 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:27:59,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:27:59,254 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:27:59,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-19 05:27:59,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:59,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 2678 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-19 05:27:59,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:28:00,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:28:00,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:28:00,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:28:00,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 31 [2021-11-19 05:28:01,107 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-11-19 05:28:01,107 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 05:28:01,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307880864] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:28:01,108 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 05:28:01,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [16] total 23 [2021-11-19 05:28:01,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189641150] [2021-11-19 05:28:01,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:28:01,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 05:28:01,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:28:01,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 05:28:01,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2021-11-19 05:28:01,112 INFO L87 Difference]: Start difference. First operand 201 states and 286 transitions. Second operand has 9 states, 8 states have (on average 7.0) internal successors, (56), 8 states have internal predecessors, (56), 3 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 05:28:01,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:28:01,252 INFO L93 Difference]: Finished difference Result 316 states and 444 transitions. [2021-11-19 05:28:01,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 05:28:01,254 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 7.0) internal successors, (56), 8 states have internal predecessors, (56), 3 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 124 [2021-11-19 05:28:01,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:28:01,257 INFO L225 Difference]: With dead ends: 316 [2021-11-19 05:28:01,257 INFO L226 Difference]: Without dead ends: 208 [2021-11-19 05:28:01,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2021-11-19 05:28:01,260 INFO L933 BasicCegarLoop]: 240 mSDtfsCounter, 13 mSDsluCounter, 616 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 856 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 05:28:01,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 856 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 10 Invalid, 0 Unknown, 61 Unchecked, 0.1s Time] [2021-11-19 05:28:01,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-11-19 05:28:01,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 206. [2021-11-19 05:28:01,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 134 states have (on average 1.164179104477612) internal successors, (156), 137 states have internal predecessors, (156), 57 states have call successors, (57), 13 states have call predecessors, (57), 14 states have return successors, (78), 55 states have call predecessors, (78), 56 states have call successors, (78) [2021-11-19 05:28:01,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 291 transitions. [2021-11-19 05:28:01,289 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 291 transitions. Word has length 124 [2021-11-19 05:28:01,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:28:01,290 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 291 transitions. [2021-11-19 05:28:01,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 7.0) internal successors, (56), 8 states have internal predecessors, (56), 3 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 05:28:01,291 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 291 transitions. [2021-11-19 05:28:01,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-19 05:28:01,294 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:28:01,294 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:28:01,344 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-19 05:28:01,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-19 05:28:01,510 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:28:01,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:28:01,511 INFO L85 PathProgramCache]: Analyzing trace with hash -10392004, now seen corresponding path program 1 times [2021-11-19 05:28:01,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:28:01,511 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136102882] [2021-11-19 05:28:01,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:28:01,511 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:28:02,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:02,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 05:28:02,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:02,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-19 05:28:02,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:02,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 05:28:02,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:02,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:28:02,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:02,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 05:28:02,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:02,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:28:02,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:02,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-19 05:28:02,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:02,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-19 05:28:02,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:02,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-19 05:28:02,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:02,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-11-19 05:28:02,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:02,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-19 05:28:02,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:02,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-19 05:28:02,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:02,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-11-19 05:28:02,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:02,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-19 05:28:02,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:02,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-11-19 05:28:02,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:02,542 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-19 05:28:02,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:28:02,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136102882] [2021-11-19 05:28:02,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136102882] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:28:02,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036214792] [2021-11-19 05:28:02,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:28:02,543 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:28:02,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:28:02,544 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:28:02,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-19 05:28:03,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:03,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 2680 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-19 05:28:03,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:28:03,225 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 18 treesize of output 14 [2021-11-19 05:28:03,848 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-11-19 05:28:03,849 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 05:28:03,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036214792] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:28:03,849 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 05:28:03,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [16] total 25 [2021-11-19 05:28:03,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461436060] [2021-11-19 05:28:03,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:28:03,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 05:28:03,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:28:03,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 05:28:03,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-11-19 05:28:03,851 INFO L87 Difference]: Start difference. First operand 206 states and 291 transitions. Second operand has 13 states, 12 states have (on average 5.333333333333333) internal successors, (64), 10 states have internal predecessors, (64), 5 states have call successors, (16), 3 states have call predecessors, (16), 5 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2021-11-19 05:28:04,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:28:04,597 INFO L93 Difference]: Finished difference Result 422 states and 588 transitions. [2021-11-19 05:28:04,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-19 05:28:04,598 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 5.333333333333333) internal successors, (64), 10 states have internal predecessors, (64), 5 states have call successors, (16), 3 states have call predecessors, (16), 5 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) Word has length 124 [2021-11-19 05:28:04,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:28:04,605 INFO L225 Difference]: With dead ends: 422 [2021-11-19 05:28:04,605 INFO L226 Difference]: Without dead ends: 219 [2021-11-19 05:28:04,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 141 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2021-11-19 05:28:04,613 INFO L933 BasicCegarLoop]: 212 mSDtfsCounter, 75 mSDsluCounter, 1126 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 1338 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 05:28:04,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 1338 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 89 Invalid, 0 Unknown, 44 Unchecked, 0.7s Time] [2021-11-19 05:28:04,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-11-19 05:28:04,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 213. [2021-11-19 05:28:04,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 141 states have (on average 1.1702127659574468) internal successors, (165), 143 states have internal predecessors, (165), 57 states have call successors, (57), 14 states have call predecessors, (57), 14 states have return successors, (77), 55 states have call predecessors, (77), 56 states have call successors, (77) [2021-11-19 05:28:04,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 299 transitions. [2021-11-19 05:28:04,645 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 299 transitions. Word has length 124 [2021-11-19 05:28:04,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:28:04,645 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 299 transitions. [2021-11-19 05:28:04,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 5.333333333333333) internal successors, (64), 10 states have internal predecessors, (64), 5 states have call successors, (16), 3 states have call predecessors, (16), 5 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2021-11-19 05:28:04,646 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 299 transitions. [2021-11-19 05:28:04,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-19 05:28:04,649 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:28:04,649 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:28:04,689 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-19 05:28:04,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-19 05:28:04,862 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:28:04,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:28:04,863 INFO L85 PathProgramCache]: Analyzing trace with hash 1190017078, now seen corresponding path program 1 times [2021-11-19 05:28:04,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:28:04,863 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942978292] [2021-11-19 05:28:04,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:28:04,863 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:28:04,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:05,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 05:28:05,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:05,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-19 05:28:05,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:05,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 05:28:05,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:05,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:28:05,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:05,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 05:28:05,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:05,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:28:05,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:05,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-19 05:28:05,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:05,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-19 05:28:05,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:05,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-11-19 05:28:05,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:05,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-19 05:28:05,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:05,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-11-19 05:28:05,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:05,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-11-19 05:28:05,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:05,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-11-19 05:28:05,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:05,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-11-19 05:28:05,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:05,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-11-19 05:28:05,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:05,332 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 6 proven. 22 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-11-19 05:28:05,332 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:28:05,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942978292] [2021-11-19 05:28:05,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942978292] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:28:05,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339554995] [2021-11-19 05:28:05,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:28:05,334 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:28:05,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:28:05,335 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:28:05,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-19 05:28:05,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:05,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 2687 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-19 05:28:05,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:28:06,297 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-19 05:28:06,297 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 05:28:06,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339554995] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:28:06,297 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 05:28:06,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11] total 12 [2021-11-19 05:28:06,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274363509] [2021-11-19 05:28:06,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:28:06,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 05:28:06,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:28:06,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 05:28:06,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-11-19 05:28:06,299 INFO L87 Difference]: Start difference. First operand 213 states and 299 transitions. Second operand has 9 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 3 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-19 05:28:06,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:28:06,510 INFO L93 Difference]: Finished difference Result 422 states and 608 transitions. [2021-11-19 05:28:06,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 05:28:06,511 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 3 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 128 [2021-11-19 05:28:06,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:28:06,513 INFO L225 Difference]: With dead ends: 422 [2021-11-19 05:28:06,513 INFO L226 Difference]: Without dead ends: 223 [2021-11-19 05:28:06,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 154 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-11-19 05:28:06,516 INFO L933 BasicCegarLoop]: 225 mSDtfsCounter, 12 mSDsluCounter, 1533 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1758 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 05:28:06,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 1758 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 05:28:06,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-11-19 05:28:06,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2021-11-19 05:28:06,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 149 states have (on average 1.1610738255033557) internal successors, (173), 153 states have internal predecessors, (173), 57 states have call successors, (57), 14 states have call predecessors, (57), 16 states have return successors, (98), 55 states have call predecessors, (98), 56 states have call successors, (98) [2021-11-19 05:28:06,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 328 transitions. [2021-11-19 05:28:06,543 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 328 transitions. Word has length 128 [2021-11-19 05:28:06,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:28:06,544 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 328 transitions. [2021-11-19 05:28:06,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 3 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-19 05:28:06,544 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 328 transitions. [2021-11-19 05:28:06,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-19 05:28:06,546 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:28:06,547 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:28:06,588 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-19 05:28:06,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-19 05:28:06,774 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:28:06,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:28:06,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1380691087, now seen corresponding path program 1 times [2021-11-19 05:28:06,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:28:06,775 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538841634] [2021-11-19 05:28:06,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:28:06,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:28:06,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:06,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 05:28:06,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:06,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-19 05:28:06,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:06,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 05:28:06,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:06,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:28:06,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:06,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 05:28:06,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:06,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:28:06,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:06,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-19 05:28:06,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:06,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-19 05:28:06,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:06,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-19 05:28:06,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:06,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-19 05:28:06,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:07,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-19 05:28:07,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:07,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-11-19 05:28:07,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:07,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-11-19 05:28:07,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:07,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-11-19 05:28:07,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:07,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-11-19 05:28:07,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:07,055 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-11-19 05:28:07,055 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:28:07,055 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538841634] [2021-11-19 05:28:07,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538841634] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:28:07,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672862099] [2021-11-19 05:28:07,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:28:07,056 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:28:07,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:28:07,058 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:28:07,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-19 05:28:07,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:07,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 2692 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 05:28:07,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:28:07,843 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-11-19 05:28:07,843 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 05:28:07,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672862099] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:28:07,844 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 05:28:07,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 6 [2021-11-19 05:28:07,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15333379] [2021-11-19 05:28:07,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:28:07,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 05:28:07,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:28:07,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 05:28:07,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-19 05:28:07,845 INFO L87 Difference]: Start difference. First operand 223 states and 328 transitions. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 05:28:07,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:28:07,889 INFO L93 Difference]: Finished difference Result 430 states and 646 transitions. [2021-11-19 05:28:07,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 05:28:07,890 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 130 [2021-11-19 05:28:07,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:28:07,893 INFO L225 Difference]: With dead ends: 430 [2021-11-19 05:28:07,893 INFO L226 Difference]: Without dead ends: 210 [2021-11-19 05:28:07,895 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-19 05:28:07,896 INFO L933 BasicCegarLoop]: 226 mSDtfsCounter, 9 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 672 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 05:28:07,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 672 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 05:28:07,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-11-19 05:28:07,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 204. [2021-11-19 05:28:07,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 131 states have (on average 1.1450381679389312) internal successors, (150), 135 states have internal predecessors, (150), 57 states have call successors, (57), 13 states have call predecessors, (57), 15 states have return successors, (87), 55 states have call predecessors, (87), 56 states have call successors, (87) [2021-11-19 05:28:07,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 294 transitions. [2021-11-19 05:28:07,916 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 294 transitions. Word has length 130 [2021-11-19 05:28:07,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:28:07,917 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 294 transitions. [2021-11-19 05:28:07,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 05:28:07,917 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 294 transitions. [2021-11-19 05:28:07,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-19 05:28:07,919 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:28:07,920 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 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] [2021-11-19 05:28:07,962 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-19 05:28:08,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-19 05:28:08,141 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:28:08,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:28:08,142 INFO L85 PathProgramCache]: Analyzing trace with hash 2037534571, now seen corresponding path program 1 times [2021-11-19 05:28:08,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:28:08,142 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839150503] [2021-11-19 05:28:08,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:28:08,142 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:28:08,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:08,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 05:28:08,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:08,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-19 05:28:08,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:08,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 05:28:08,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:08,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:28:08,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:09,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 05:28:09,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:09,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:28:09,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:09,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-19 05:28:09,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:09,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-19 05:28:09,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:09,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-19 05:28:09,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:09,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-19 05:28:09,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:09,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-19 05:28:09,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:09,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-11-19 05:28:09,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:09,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-11-19 05:28:09,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:09,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-11-19 05:28:09,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:09,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-11-19 05:28:09,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:09,277 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-11-19 05:28:09,277 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:28:09,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839150503] [2021-11-19 05:28:09,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839150503] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:28:09,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730131760] [2021-11-19 05:28:09,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:28:09,279 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:28:09,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:28:09,282 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:28:09,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-19 05:28:09,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:09,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 2689 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-19 05:28:09,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:28:09,982 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 18 treesize of output 14 [2021-11-19 05:28:10,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:28:10,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 39 [2021-11-19 05:28:10,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:28:10,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 38 [2021-11-19 05:28:10,611 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 05:28:10,615 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 1 case distinctions, treesize of input 35 treesize of output 23 [2021-11-19 05:28:11,437 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-19 05:28:11,437 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 05:28:11,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730131760] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:28:11,438 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 05:28:11,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [16] total 28 [2021-11-19 05:28:11,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759002278] [2021-11-19 05:28:11,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:28:11,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-19 05:28:11,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:28:11,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-19 05:28:11,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-11-19 05:28:11,440 INFO L87 Difference]: Start difference. First operand 204 states and 294 transitions. Second operand has 15 states, 15 states have (on average 5.533333333333333) internal successors, (83), 14 states have internal predecessors, (83), 6 states have call successors, (16), 3 states have call predecessors, (16), 6 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) [2021-11-19 05:28:13,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:28:13,617 INFO L93 Difference]: Finished difference Result 513 states and 769 transitions. [2021-11-19 05:28:13,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-19 05:28:13,618 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.533333333333333) internal successors, (83), 14 states have internal predecessors, (83), 6 states have call successors, (16), 3 states have call predecessors, (16), 6 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) Word has length 130 [2021-11-19 05:28:13,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:28:13,622 INFO L225 Difference]: With dead ends: 513 [2021-11-19 05:28:13,623 INFO L226 Difference]: Without dead ends: 361 [2021-11-19 05:28:13,624 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 137 SyntacticMatches, 10 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=121, Invalid=935, Unknown=0, NotChecked=0, Total=1056 [2021-11-19 05:28:13,626 INFO L933 BasicCegarLoop]: 289 mSDtfsCounter, 89 mSDsluCounter, 1633 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 1922 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 116 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-19 05:28:13,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 1922 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 264 Invalid, 0 Unknown, 116 Unchecked, 2.0s Time] [2021-11-19 05:28:13,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2021-11-19 05:28:13,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 267. [2021-11-19 05:28:13,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 179 states have (on average 1.1508379888268156) internal successors, (206), 184 states have internal predecessors, (206), 67 states have call successors, (67), 17 states have call predecessors, (67), 20 states have return successors, (106), 65 states have call predecessors, (106), 66 states have call successors, (106) [2021-11-19 05:28:13,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 379 transitions. [2021-11-19 05:28:13,656 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 379 transitions. Word has length 130 [2021-11-19 05:28:13,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:28:13,657 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 379 transitions. [2021-11-19 05:28:13,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.533333333333333) internal successors, (83), 14 states have internal predecessors, (83), 6 states have call successors, (16), 3 states have call predecessors, (16), 6 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) [2021-11-19 05:28:13,657 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 379 transitions. [2021-11-19 05:28:13,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-19 05:28:13,660 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:28:13,660 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 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] [2021-11-19 05:28:13,710 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-19 05:28:13,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-19 05:28:13,874 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:28:13,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:28:13,875 INFO L85 PathProgramCache]: Analyzing trace with hash 78959785, now seen corresponding path program 1 times [2021-11-19 05:28:13,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:28:13,875 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156722505] [2021-11-19 05:28:13,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:28:13,875 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:28:14,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:14,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 05:28:14,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:14,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-19 05:28:14,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:14,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 05:28:14,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:14,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:28:14,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:14,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 05:28:14,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:14,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:28:14,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:14,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-19 05:28:14,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:14,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-19 05:28:14,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:15,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-19 05:28:15,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:15,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-19 05:28:15,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:15,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-19 05:28:15,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:15,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-11-19 05:28:15,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:15,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-11-19 05:28:15,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:15,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-11-19 05:28:15,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:15,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-11-19 05:28:15,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:15,267 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 6 proven. 59 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-11-19 05:28:15,267 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:28:15,268 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156722505] [2021-11-19 05:28:15,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156722505] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:28:15,268 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983241050] [2021-11-19 05:28:15,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:28:15,268 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:28:15,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:28:15,269 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:28:15,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-19 05:28:15,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:15,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 2694 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-19 05:28:15,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:28:15,924 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 18 treesize of output 14 [2021-11-19 05:28:16,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:28:16,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 39 [2021-11-19 05:28:16,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:28:16,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 38 [2021-11-19 05:28:16,571 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 05:28:16,572 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 1 case distinctions, treesize of input 35 treesize of output 23 [2021-11-19 05:28:17,496 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-19 05:28:17,496 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 05:28:17,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983241050] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:28:17,497 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 05:28:17,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [20] total 33 [2021-11-19 05:28:17,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467483285] [2021-11-19 05:28:17,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:28:17,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-19 05:28:17,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:28:17,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-19 05:28:17,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=975, Unknown=0, NotChecked=0, Total=1056 [2021-11-19 05:28:17,499 INFO L87 Difference]: Start difference. First operand 267 states and 379 transitions. Second operand has 15 states, 15 states have (on average 5.533333333333333) internal successors, (83), 14 states have internal predecessors, (83), 6 states have call successors, (16), 3 states have call predecessors, (16), 6 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) [2021-11-19 05:28:18,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:28:18,874 INFO L93 Difference]: Finished difference Result 596 states and 855 transitions. [2021-11-19 05:28:18,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-19 05:28:18,874 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.533333333333333) internal successors, (83), 14 states have internal predecessors, (83), 6 states have call successors, (16), 3 states have call predecessors, (16), 6 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) Word has length 130 [2021-11-19 05:28:18,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:28:18,879 INFO L225 Difference]: With dead ends: 596 [2021-11-19 05:28:18,879 INFO L226 Difference]: Without dead ends: 444 [2021-11-19 05:28:18,881 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 136 SyntacticMatches, 10 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=101, Invalid=1159, Unknown=0, NotChecked=0, Total=1260 [2021-11-19 05:28:18,882 INFO L933 BasicCegarLoop]: 278 mSDtfsCounter, 89 mSDsluCounter, 1361 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 1639 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-19 05:28:18,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 1639 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 171 Invalid, 0 Unknown, 88 Unchecked, 1.2s Time] [2021-11-19 05:28:18,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-11-19 05:28:18,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 357. [2021-11-19 05:28:18,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 255 states have (on average 1.1607843137254903) internal successors, (296), 265 states have internal predecessors, (296), 73 states have call successors, (73), 22 states have call predecessors, (73), 28 states have return successors, (118), 69 states have call predecessors, (118), 72 states have call successors, (118) [2021-11-19 05:28:18,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 487 transitions. [2021-11-19 05:28:18,920 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 487 transitions. Word has length 130 [2021-11-19 05:28:18,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:28:18,921 INFO L470 AbstractCegarLoop]: Abstraction has 357 states and 487 transitions. [2021-11-19 05:28:18,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.533333333333333) internal successors, (83), 14 states have internal predecessors, (83), 6 states have call successors, (16), 3 states have call predecessors, (16), 6 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) [2021-11-19 05:28:18,922 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 487 transitions. [2021-11-19 05:28:18,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-19 05:28:18,926 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:28:18,926 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:28:18,970 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-19 05:28:19,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:28:19,142 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:28:19,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:28:19,143 INFO L85 PathProgramCache]: Analyzing trace with hash -34334491, now seen corresponding path program 2 times [2021-11-19 05:28:19,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:28:19,143 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103635570] [2021-11-19 05:28:19,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:28:19,143 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:28:19,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:19,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 05:28:19,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:19,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-19 05:28:19,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:19,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 05:28:19,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:19,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:28:19,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:19,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 05:28:19,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:19,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:28:19,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:19,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-19 05:28:19,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:19,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-19 05:28:19,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:19,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-19 05:28:19,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:19,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-19 05:28:19,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:19,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-19 05:28:19,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:19,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-11-19 05:28:19,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:19,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-11-19 05:28:19,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:19,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-11-19 05:28:19,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:19,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-11-19 05:28:19,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:19,655 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 21 proven. 8 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-11-19 05:28:19,655 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:28:19,655 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103635570] [2021-11-19 05:28:19,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103635570] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:28:19,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175831464] [2021-11-19 05:28:19,656 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 05:28:19,656 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:28:19,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:28:19,658 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:28:19,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-19 05:28:20,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-19 05:28:20,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:28:20,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 2347 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-19 05:28:20,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:28:20,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:28:20,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:28:20,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:28:20,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 17 [2021-11-19 05:28:20,836 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-19 05:28:20,836 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 05:28:20,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175831464] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:28:20,836 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 05:28:20,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11] total 18 [2021-11-19 05:28:20,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630921787] [2021-11-19 05:28:20,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:28:20,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 05:28:20,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:28:20,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 05:28:20,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-11-19 05:28:20,839 INFO L87 Difference]: Start difference. First operand 357 states and 487 transitions. Second operand has 9 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 3 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 05:28:20,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:28:20,883 INFO L93 Difference]: Finished difference Result 487 states and 663 transitions. [2021-11-19 05:28:20,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 05:28:20,883 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 3 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 134 [2021-11-19 05:28:20,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:28:20,887 INFO L225 Difference]: With dead ends: 487 [2021-11-19 05:28:20,887 INFO L226 Difference]: Without dead ends: 374 [2021-11-19 05:28:20,888 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-11-19 05:28:20,889 INFO L933 BasicCegarLoop]: 243 mSDtfsCounter, 17 mSDsluCounter, 1014 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 1257 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 152 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 05:28:20,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 1257 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 152 Unchecked, 0.0s Time] [2021-11-19 05:28:20,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2021-11-19 05:28:20,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 366. [2021-11-19 05:28:20,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 264 states have (on average 1.1628787878787878) internal successors, (307), 273 states have internal predecessors, (307), 73 states have call successors, (73), 23 states have call predecessors, (73), 28 states have return successors, (108), 69 states have call predecessors, (108), 72 states have call successors, (108) [2021-11-19 05:28:20,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 488 transitions. [2021-11-19 05:28:20,919 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 488 transitions. Word has length 134 [2021-11-19 05:28:20,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:28:20,920 INFO L470 AbstractCegarLoop]: Abstraction has 366 states and 488 transitions. [2021-11-19 05:28:20,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 3 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 05:28:20,920 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 488 transitions. [2021-11-19 05:28:20,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-19 05:28:20,923 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:28:20,923 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:28:20,963 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-19 05:28:21,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-19 05:28:21,148 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:28:21,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:28:21,149 INFO L85 PathProgramCache]: Analyzing trace with hash 223830947, now seen corresponding path program 3 times [2021-11-19 05:28:21,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:28:21,149 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004079038] [2021-11-19 05:28:21,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:28:21,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:28:21,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:21,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 05:28:21,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:21,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-19 05:28:21,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:21,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 05:28:21,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:21,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:28:21,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:21,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 05:28:21,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:21,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:28:21,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:21,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-19 05:28:21,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:21,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-19 05:28:21,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:21,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-19 05:28:21,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:21,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-19 05:28:21,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:21,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-19 05:28:21,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:21,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-11-19 05:28:21,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:21,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-11-19 05:28:21,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:21,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-11-19 05:28:21,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:21,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-11-19 05:28:21,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:21,575 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 21 proven. 8 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-11-19 05:28:21,575 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:28:21,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004079038] [2021-11-19 05:28:21,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004079038] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:28:21,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897987181] [2021-11-19 05:28:21,576 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 05:28:21,576 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:28:21,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:28:21,578 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:28:21,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-19 05:28:21,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2021-11-19 05:28:21,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:28:21,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 2342 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 05:28:21,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:28:22,347 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-11-19 05:28:22,348 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 05:28:22,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897987181] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:28:22,348 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 05:28:22,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 14 [2021-11-19 05:28:22,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336980069] [2021-11-19 05:28:22,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:28:22,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 05:28:22,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:28:22,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 05:28:22,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2021-11-19 05:28:22,350 INFO L87 Difference]: Start difference. First operand 366 states and 488 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2021-11-19 05:28:23,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:28:23,543 INFO L93 Difference]: Finished difference Result 679 states and 922 transitions. [2021-11-19 05:28:23,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 05:28:23,544 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) Word has length 134 [2021-11-19 05:28:23,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:28:23,548 INFO L225 Difference]: With dead ends: 679 [2021-11-19 05:28:23,549 INFO L226 Difference]: Without dead ends: 379 [2021-11-19 05:28:23,551 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-11-19 05:28:23,552 INFO L933 BasicCegarLoop]: 231 mSDtfsCounter, 24 mSDsluCounter, 573 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 804 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-19 05:28:23,552 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 804 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 90 Invalid, 0 Unknown, 49 Unchecked, 1.1s Time] [2021-11-19 05:28:23,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-11-19 05:28:23,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 364. [2021-11-19 05:28:23,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 262 states have (on average 1.1450381679389312) internal successors, (300), 271 states have internal predecessors, (300), 73 states have call successors, (73), 23 states have call predecessors, (73), 28 states have return successors, (116), 69 states have call predecessors, (116), 72 states have call successors, (116) [2021-11-19 05:28:23,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 489 transitions. [2021-11-19 05:28:23,581 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 489 transitions. Word has length 134 [2021-11-19 05:28:23,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:28:23,582 INFO L470 AbstractCegarLoop]: Abstraction has 364 states and 489 transitions. [2021-11-19 05:28:23,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2021-11-19 05:28:23,582 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 489 transitions. [2021-11-19 05:28:23,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-19 05:28:23,585 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:28:23,585 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:28:23,626 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-19 05:28:23,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:28:23,798 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:28:23,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:28:23,799 INFO L85 PathProgramCache]: Analyzing trace with hash -984070051, now seen corresponding path program 1 times [2021-11-19 05:28:23,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:28:23,799 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778171072] [2021-11-19 05:28:23,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:28:23,799 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:28:23,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:24,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 05:28:24,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:24,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-19 05:28:24,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:24,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 05:28:24,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:24,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:28:24,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:24,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 05:28:24,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:24,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:28:24,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:24,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-19 05:28:24,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:24,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-19 05:28:24,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:24,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-19 05:28:24,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:24,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-19 05:28:24,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:24,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-19 05:28:24,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:24,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-11-19 05:28:24,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:24,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-11-19 05:28:24,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:24,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-11-19 05:28:24,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:24,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-11-19 05:28:24,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:24,299 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 21 proven. 8 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-11-19 05:28:24,300 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:28:24,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778171072] [2021-11-19 05:28:24,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778171072] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:28:24,301 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887234553] [2021-11-19 05:28:24,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:28:24,301 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:28:24,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:28:24,302 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:28:24,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-19 05:28:24,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:24,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 2699 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-19 05:28:24,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:28:25,138 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-11-19 05:28:25,139 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 05:28:25,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887234553] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:28:25,139 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 05:28:25,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11] total 12 [2021-11-19 05:28:25,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693929781] [2021-11-19 05:28:25,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:28:25,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 05:28:25,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:28:25,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 05:28:25,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-11-19 05:28:25,141 INFO L87 Difference]: Start difference. First operand 364 states and 489 transitions. Second operand has 9 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 3 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-19 05:28:25,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:28:25,360 INFO L93 Difference]: Finished difference Result 528 states and 716 transitions. [2021-11-19 05:28:25,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 05:28:25,361 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 3 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 134 [2021-11-19 05:28:25,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:28:25,365 INFO L225 Difference]: With dead ends: 528 [2021-11-19 05:28:25,365 INFO L226 Difference]: Without dead ends: 369 [2021-11-19 05:28:25,367 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 161 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-11-19 05:28:25,368 INFO L933 BasicCegarLoop]: 226 mSDtfsCounter, 12 mSDsluCounter, 1537 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1763 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 05:28:25,368 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 1763 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 05:28:25,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-11-19 05:28:25,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 357. [2021-11-19 05:28:25,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 257 states have (on average 1.1478599221789882) internal successors, (295), 264 states have internal predecessors, (295), 73 states have call successors, (73), 23 states have call predecessors, (73), 26 states have return successors, (110), 69 states have call predecessors, (110), 72 states have call successors, (110) [2021-11-19 05:28:25,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 478 transitions. [2021-11-19 05:28:25,397 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 478 transitions. Word has length 134 [2021-11-19 05:28:25,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:28:25,398 INFO L470 AbstractCegarLoop]: Abstraction has 357 states and 478 transitions. [2021-11-19 05:28:25,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 3 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-19 05:28:25,398 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 478 transitions. [2021-11-19 05:28:25,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-19 05:28:25,401 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:28:25,401 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:28:25,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-19 05:28:25,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:28:25,615 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:28:25,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:28:25,615 INFO L85 PathProgramCache]: Analyzing trace with hash -2087607718, now seen corresponding path program 1 times [2021-11-19 05:28:25,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:28:25,615 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298485514] [2021-11-19 05:28:25,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:28:25,615 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:28:25,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:26,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 05:28:26,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:26,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-19 05:28:26,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:26,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 05:28:26,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:26,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:28:26,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:26,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 05:28:26,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:26,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:28:26,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:26,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-19 05:28:26,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:26,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-19 05:28:26,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:26,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-19 05:28:26,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:26,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-19 05:28:26,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:26,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-11-19 05:28:26,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:26,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-19 05:28:26,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:26,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-11-19 05:28:26,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:26,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-11-19 05:28:26,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:26,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-11-19 05:28:26,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:26,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-11-19 05:28:26,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:26,792 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2021-11-19 05:28:26,793 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:28:26,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298485514] [2021-11-19 05:28:26,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298485514] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:28:26,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448932117] [2021-11-19 05:28:26,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:28:26,794 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:28:26,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:28:26,795 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:28:26,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-19 05:28:27,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:27,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 2713 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-19 05:28:27,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:28:27,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-19 05:28:27,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:28:28,025 INFO L354 Elim1Store]: treesize reduction 172, result has 12.2 percent of original size [2021-11-19 05:28:28,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 76 treesize of output 59 [2021-11-19 05:28:28,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:28:28,085 INFO L354 Elim1Store]: treesize reduction 262, result has 11.2 percent of original size [2021-11-19 05:28:28,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 61 treesize of output 47 [2021-11-19 05:28:28,229 INFO L354 Elim1Store]: treesize reduction 62, result has 1.6 percent of original size [2021-11-19 05:28:28,229 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 6 case distinctions, treesize of input 51 treesize of output 21 [2021-11-19 05:28:28,439 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 96 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-11-19 05:28:28,439 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 05:28:28,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448932117] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:28:28,440 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 05:28:28,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [19] total 25 [2021-11-19 05:28:28,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867678312] [2021-11-19 05:28:28,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:28:28,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 05:28:28,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:28:28,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 05:28:28,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2021-11-19 05:28:28,442 INFO L87 Difference]: Start difference. First operand 357 states and 478 transitions. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 4 states have call successors, (17), 3 states have call predecessors, (17), 4 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-19 05:28:30,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:28:30,706 INFO L93 Difference]: Finished difference Result 616 states and 889 transitions. [2021-11-19 05:28:30,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-19 05:28:30,707 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 4 states have call successors, (17), 3 states have call predecessors, (17), 4 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 137 [2021-11-19 05:28:30,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:28:30,712 INFO L225 Difference]: With dead ends: 616 [2021-11-19 05:28:30,712 INFO L226 Difference]: Without dead ends: 449 [2021-11-19 05:28:30,714 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 156 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2021-11-19 05:28:30,714 INFO L933 BasicCegarLoop]: 310 mSDtfsCounter, 72 mSDsluCounter, 1802 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 2112 SdHoareTripleChecker+Invalid, 626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 96 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-19 05:28:30,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 2112 Invalid, 626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 527 Invalid, 0 Unknown, 96 Unchecked, 2.0s Time] [2021-11-19 05:28:30,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2021-11-19 05:28:30,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 373. [2021-11-19 05:28:30,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 270 states have (on average 1.137037037037037) internal successors, (307), 279 states have internal predecessors, (307), 73 states have call successors, (73), 24 states have call predecessors, (73), 29 states have return successors, (124), 69 states have call predecessors, (124), 72 states have call successors, (124) [2021-11-19 05:28:30,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 504 transitions. [2021-11-19 05:28:30,761 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 504 transitions. Word has length 137 [2021-11-19 05:28:30,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:28:30,761 INFO L470 AbstractCegarLoop]: Abstraction has 373 states and 504 transitions. [2021-11-19 05:28:30,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 4 states have call successors, (17), 3 states have call predecessors, (17), 4 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-19 05:28:30,762 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 504 transitions. [2021-11-19 05:28:30,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-19 05:28:30,765 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:28:30,765 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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] [2021-11-19 05:28:30,813 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-19 05:28:30,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:28:30,990 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:28:30,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:28:30,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1691174062, now seen corresponding path program 2 times [2021-11-19 05:28:30,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:28:30,991 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038337519] [2021-11-19 05:28:30,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:28:30,991 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:28:31,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:31,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 05:28:31,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:31,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-19 05:28:31,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:31,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 05:28:31,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:31,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:28:31,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:31,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 05:28:31,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:31,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:28:31,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:31,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-19 05:28:31,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:31,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-19 05:28:31,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:31,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-19 05:28:31,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:31,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-19 05:28:31,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:31,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-19 05:28:31,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:31,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-11-19 05:28:31,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:31,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-11-19 05:28:31,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:31,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-11-19 05:28:31,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:31,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-11-19 05:28:31,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:32,054 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-11-19 05:28:32,054 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:28:32,054 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038337519] [2021-11-19 05:28:32,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038337519] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:28:32,055 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:28:32,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-19 05:28:32,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516974170] [2021-11-19 05:28:32,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:28:32,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 05:28:32,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:28:32,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 05:28:32,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 05:28:32,057 INFO L87 Difference]: Start difference. First operand 373 states and 504 transitions. Second operand has 11 states, 10 states have (on average 6.5) internal successors, (65), 9 states have internal predecessors, (65), 3 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 05:28:34,123 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:28:36,182 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:28:37,413 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:28:38,469 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:28:39,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:28:39,953 INFO L93 Difference]: Finished difference Result 531 states and 717 transitions. [2021-11-19 05:28:39,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-19 05:28:39,956 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 6.5) internal successors, (65), 9 states have internal predecessors, (65), 3 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 136 [2021-11-19 05:28:39,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:28:39,960 INFO L225 Difference]: With dead ends: 531 [2021-11-19 05:28:39,960 INFO L226 Difference]: Without dead ends: 420 [2021-11-19 05:28:39,961 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-11-19 05:28:39,962 INFO L933 BasicCegarLoop]: 206 mSDtfsCounter, 158 mSDsluCounter, 780 mSDsCounter, 0 mSdLazyCounter, 865 mSolverCounterSat, 118 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 986 SdHoareTripleChecker+Invalid, 985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 865 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2021-11-19 05:28:39,962 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 986 Invalid, 985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 865 Invalid, 2 Unknown, 0 Unchecked, 7.7s Time] [2021-11-19 05:28:39,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2021-11-19 05:28:39,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 376. [2021-11-19 05:28:39,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 273 states have (on average 1.1355311355311355) internal successors, (310), 282 states have internal predecessors, (310), 73 states have call successors, (73), 24 states have call predecessors, (73), 29 states have return successors, (124), 69 states have call predecessors, (124), 72 states have call successors, (124) [2021-11-19 05:28:39,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 507 transitions. [2021-11-19 05:28:39,994 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 507 transitions. Word has length 136 [2021-11-19 05:28:39,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:28:39,994 INFO L470 AbstractCegarLoop]: Abstraction has 376 states and 507 transitions. [2021-11-19 05:28:39,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 6.5) internal successors, (65), 9 states have internal predecessors, (65), 3 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 05:28:39,995 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 507 transitions. [2021-11-19 05:28:39,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-19 05:28:39,997 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:28:39,998 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:28:39,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-19 05:28:39,998 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:28:39,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:28:39,999 INFO L85 PathProgramCache]: Analyzing trace with hash 1323929556, now seen corresponding path program 3 times [2021-11-19 05:28:39,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:28:39,999 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714946577] [2021-11-19 05:28:39,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:28:39,999 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:28:40,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:40,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 05:28:40,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:40,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-19 05:28:40,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:40,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 05:28:40,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:40,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:28:40,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:40,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 05:28:40,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:40,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:28:40,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:40,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-19 05:28:40,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:40,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-19 05:28:40,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:40,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-19 05:28:40,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:40,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-19 05:28:40,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:40,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-19 05:28:40,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:40,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-11-19 05:28:40,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:40,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-11-19 05:28:40,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:40,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-11-19 05:28:40,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:40,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-11-19 05:28:40,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:40,553 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-11-19 05:28:40,554 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:28:40,554 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714946577] [2021-11-19 05:28:40,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714946577] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:28:40,554 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:28:40,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-19 05:28:40,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295727859] [2021-11-19 05:28:40,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:28:40,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 05:28:40,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:28:40,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 05:28:40,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 05:28:40,558 INFO L87 Difference]: Start difference. First operand 376 states and 507 transitions. Second operand has 11 states, 10 states have (on average 6.5) internal successors, (65), 9 states have internal predecessors, (65), 3 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 05:28:42,107 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:28:43,295 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:28:46,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:28:46,914 INFO L93 Difference]: Finished difference Result 586 states and 806 transitions. [2021-11-19 05:28:46,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 05:28:46,914 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 6.5) internal successors, (65), 9 states have internal predecessors, (65), 3 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 136 [2021-11-19 05:28:46,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:28:46,918 INFO L225 Difference]: With dead ends: 586 [2021-11-19 05:28:46,919 INFO L226 Difference]: Without dead ends: 472 [2021-11-19 05:28:46,920 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-11-19 05:28:46,921 INFO L933 BasicCegarLoop]: 286 mSDtfsCounter, 197 mSDsluCounter, 988 mSDsCounter, 0 mSdLazyCounter, 1141 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 1274 SdHoareTripleChecker+Invalid, 1273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 1141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2021-11-19 05:28:46,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 1274 Invalid, 1273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 1141 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2021-11-19 05:28:46,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-11-19 05:28:46,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 368. [2021-11-19 05:28:46,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 266 states have (on average 1.1390977443609023) internal successors, (303), 274 states have internal predecessors, (303), 73 states have call successors, (73), 24 states have call predecessors, (73), 28 states have return successors, (114), 69 states have call predecessors, (114), 72 states have call successors, (114) [2021-11-19 05:28:46,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 490 transitions. [2021-11-19 05:28:46,961 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 490 transitions. Word has length 136 [2021-11-19 05:28:46,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:28:46,962 INFO L470 AbstractCegarLoop]: Abstraction has 368 states and 490 transitions. [2021-11-19 05:28:46,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 6.5) internal successors, (65), 9 states have internal predecessors, (65), 3 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 05:28:46,962 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 490 transitions. [2021-11-19 05:28:46,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-19 05:28:46,965 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:28:46,965 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:28:46,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-19 05:28:46,966 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:28:46,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:28:46,967 INFO L85 PathProgramCache]: Analyzing trace with hash -1902565441, now seen corresponding path program 1 times [2021-11-19 05:28:46,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:28:46,967 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329953890] [2021-11-19 05:28:46,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:28:46,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:28:47,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:47,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 05:28:47,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:47,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-19 05:28:47,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:47,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 05:28:47,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:47,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:28:47,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:47,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 05:28:47,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:47,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:28:47,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:47,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-19 05:28:47,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:47,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-19 05:28:47,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:47,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-19 05:28:47,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:47,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-19 05:28:47,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:47,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-19 05:28:47,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:47,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-11-19 05:28:47,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:47,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-11-19 05:28:47,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:47,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-11-19 05:28:47,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:47,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-11-19 05:28:47,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:47,425 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2021-11-19 05:28:47,425 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:28:47,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329953890] [2021-11-19 05:28:47,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329953890] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:28:47,425 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:28:47,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-19 05:28:47,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497019865] [2021-11-19 05:28:47,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:28:47,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 05:28:47,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:28:47,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 05:28:47,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-11-19 05:28:47,427 INFO L87 Difference]: Start difference. First operand 368 states and 490 transitions. Second operand has 12 states, 11 states have (on average 5.181818181818182) internal successors, (57), 8 states have internal predecessors, (57), 2 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2021-11-19 05:28:49,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:28:49,791 INFO L93 Difference]: Finished difference Result 395 states and 518 transitions. [2021-11-19 05:28:49,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-19 05:28:49,791 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 5.181818181818182) internal successors, (57), 8 states have internal predecessors, (57), 2 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) Word has length 138 [2021-11-19 05:28:49,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:28:49,797 INFO L225 Difference]: With dead ends: 395 [2021-11-19 05:28:49,797 INFO L226 Difference]: Without dead ends: 393 [2021-11-19 05:28:49,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-11-19 05:28:49,800 INFO L933 BasicCegarLoop]: 209 mSDtfsCounter, 91 mSDsluCounter, 1410 mSDsCounter, 0 mSdLazyCounter, 686 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 1619 SdHoareTripleChecker+Invalid, 756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-19 05:28:49,800 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 1619 Invalid, 756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 686 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-11-19 05:28:49,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2021-11-19 05:28:49,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 368. [2021-11-19 05:28:49,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 266 states have (on average 1.1390977443609023) internal successors, (303), 274 states have internal predecessors, (303), 73 states have call successors, (73), 24 states have call predecessors, (73), 28 states have return successors, (114), 69 states have call predecessors, (114), 72 states have call successors, (114) [2021-11-19 05:28:49,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 490 transitions. [2021-11-19 05:28:49,857 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 490 transitions. Word has length 138 [2021-11-19 05:28:49,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:28:49,857 INFO L470 AbstractCegarLoop]: Abstraction has 368 states and 490 transitions. [2021-11-19 05:28:49,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 5.181818181818182) internal successors, (57), 8 states have internal predecessors, (57), 2 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2021-11-19 05:28:49,858 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 490 transitions. [2021-11-19 05:28:49,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-19 05:28:49,861 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:28:49,861 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:28:49,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-19 05:28:49,862 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:28:49,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:28:49,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1201500863, now seen corresponding path program 1 times [2021-11-19 05:28:49,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:28:49,863 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752945755] [2021-11-19 05:28:49,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:28:49,863 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:28:50,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:50,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 05:28:50,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:50,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-19 05:28:50,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:50,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 05:28:50,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:50,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:28:50,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:51,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 05:28:51,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:51,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:28:51,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:51,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-19 05:28:51,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:51,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-19 05:28:51,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:51,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-19 05:28:51,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:51,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-19 05:28:51,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:51,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-19 05:28:51,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:51,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-11-19 05:28:51,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:51,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-11-19 05:28:51,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:51,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-11-19 05:28:51,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:51,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-11-19 05:28:51,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:51,465 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 25 proven. 20 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-11-19 05:28:51,465 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:28:51,465 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752945755] [2021-11-19 05:28:51,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752945755] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:28:51,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188647499] [2021-11-19 05:28:51,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:28:51,466 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:28:51,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:28:51,468 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:28:51,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-19 05:28:52,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:52,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 2708 conjuncts, 64 conjunts are in the unsatisfiable core [2021-11-19 05:28:52,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:28:52,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:28:52,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 103 [2021-11-19 05:28:52,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:28:52,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 89 [2021-11-19 05:28:52,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:28:52,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:28:52,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:28:52,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 75 [2021-11-19 05:28:52,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:28:52,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:28:52,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:28:52,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 52 [2021-11-19 05:28:54,924 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-11-19 05:28:54,924 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 6 case distinctions, treesize of input 85 treesize of output 73 [2021-11-19 05:28:54,940 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-11-19 05:28:54,941 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 6 case distinctions, treesize of input 67 treesize of output 55 [2021-11-19 05:28:55,149 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 57 proven. 22 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-11-19 05:28:55,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:28:56,623 INFO L354 Elim1Store]: treesize reduction 28, result has 26.3 percent of original size [2021-11-19 05:28:56,623 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 113 treesize of output 102 [2021-11-19 05:28:56,647 INFO L354 Elim1Store]: treesize reduction 28, result has 26.3 percent of original size [2021-11-19 05:28:56,647 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 102 treesize of output 91 [2021-11-19 05:28:56,657 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 76 treesize of output 72 [2021-11-19 05:28:56,665 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 57 treesize of output 53 [2021-11-19 05:28:56,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 91 [2021-11-19 05:28:56,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 142 treesize of output 130 [2021-11-19 05:28:57,309 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-19 05:28:57,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188647499] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 05:28:57,310 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-19 05:28:57,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [24, 25] total 58 [2021-11-19 05:28:57,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957755957] [2021-11-19 05:28:57,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:28:57,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-19 05:28:57,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:28:57,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-19 05:28:57,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=3142, Unknown=0, NotChecked=0, Total=3306 [2021-11-19 05:28:57,314 INFO L87 Difference]: Start difference. First operand 368 states and 490 transitions. Second operand has 16 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 05:28:58,812 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:28:59,866 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:29:04,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:29:04,866 INFO L93 Difference]: Finished difference Result 437 states and 588 transitions. [2021-11-19 05:29:04,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-19 05:29:04,866 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) Word has length 138 [2021-11-19 05:29:04,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:29:04,870 INFO L225 Difference]: With dead ends: 437 [2021-11-19 05:29:04,871 INFO L226 Difference]: Without dead ends: 435 [2021-11-19 05:29:04,873 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 267 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 812 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=227, Invalid=4329, Unknown=0, NotChecked=0, Total=4556 [2021-11-19 05:29:04,874 INFO L933 BasicCegarLoop]: 259 mSDtfsCounter, 74 mSDsluCounter, 2953 mSDsCounter, 0 mSdLazyCounter, 883 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 3212 SdHoareTripleChecker+Invalid, 902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 883 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2021-11-19 05:29:04,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 3212 Invalid, 902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 883 Invalid, 0 Unknown, 0 Unchecked, 6.9s Time] [2021-11-19 05:29:04,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-11-19 05:29:04,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 368. [2021-11-19 05:29:04,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 266 states have (on average 1.1390977443609023) internal successors, (303), 274 states have internal predecessors, (303), 73 states have call successors, (73), 24 states have call predecessors, (73), 28 states have return successors, (114), 69 states have call predecessors, (114), 72 states have call successors, (114) [2021-11-19 05:29:04,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 490 transitions. [2021-11-19 05:29:04,926 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 490 transitions. Word has length 138 [2021-11-19 05:29:04,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:29:04,927 INFO L470 AbstractCegarLoop]: Abstraction has 368 states and 490 transitions. [2021-11-19 05:29:04,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 05:29:04,928 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 490 transitions. [2021-11-19 05:29:04,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-19 05:29:04,931 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:29:04,931 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:29:04,977 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-19 05:29:05,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:29:05,146 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:29:05,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:29:05,147 INFO L85 PathProgramCache]: Analyzing trace with hash -1335514369, now seen corresponding path program 1 times [2021-11-19 05:29:05,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:29:05,147 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502847296] [2021-11-19 05:29:05,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:29:05,147 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:29:05,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:05,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 05:29:05,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:05,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-19 05:29:05,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:05,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 05:29:05,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:05,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:29:05,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:05,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 05:29:05,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:05,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:29:05,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:05,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-19 05:29:05,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:05,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-19 05:29:05,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:05,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-19 05:29:05,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:05,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-19 05:29:05,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:05,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-19 05:29:05,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:05,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-11-19 05:29:05,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:05,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-11-19 05:29:05,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:05,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-11-19 05:29:05,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:05,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-11-19 05:29:05,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:05,907 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-11-19 05:29:05,907 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:29:05,907 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502847296] [2021-11-19 05:29:05,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502847296] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:29:05,908 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:29:05,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-19 05:29:05,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587008628] [2021-11-19 05:29:05,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:29:05,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 05:29:05,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:29:05,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 05:29:05,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-19 05:29:05,910 INFO L87 Difference]: Start difference. First operand 368 states and 490 transitions. Second operand has 9 states, 8 states have (on average 8.375) internal successors, (67), 7 states have internal predecessors, (67), 3 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 05:29:07,965 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:29:09,695 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:29:11,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:29:11,788 INFO L93 Difference]: Finished difference Result 533 states and 736 transitions. [2021-11-19 05:29:11,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 05:29:11,789 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 8.375) internal successors, (67), 7 states have internal predecessors, (67), 3 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 138 [2021-11-19 05:29:11,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:29:11,792 INFO L225 Difference]: With dead ends: 533 [2021-11-19 05:29:11,793 INFO L226 Difference]: Without dead ends: 427 [2021-11-19 05:29:11,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-11-19 05:29:11,795 INFO L933 BasicCegarLoop]: 278 mSDtfsCounter, 163 mSDsluCounter, 864 mSDsCounter, 0 mSdLazyCounter, 928 mSolverCounterSat, 130 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 1142 SdHoareTripleChecker+Invalid, 1059 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 928 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2021-11-19 05:29:11,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 1142 Invalid, 1059 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 928 Invalid, 1 Unknown, 0 Unchecked, 5.7s Time] [2021-11-19 05:29:11,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-11-19 05:29:11,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 367. [2021-11-19 05:29:11,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 266 states have (on average 1.1390977443609023) internal successors, (303), 274 states have internal predecessors, (303), 72 states have call successors, (72), 24 states have call predecessors, (72), 28 states have return successors, (112), 68 states have call predecessors, (112), 71 states have call successors, (112) [2021-11-19 05:29:11,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 487 transitions. [2021-11-19 05:29:11,859 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 487 transitions. Word has length 138 [2021-11-19 05:29:11,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:29:11,860 INFO L470 AbstractCegarLoop]: Abstraction has 367 states and 487 transitions. [2021-11-19 05:29:11,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 8.375) internal successors, (67), 7 states have internal predecessors, (67), 3 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 05:29:11,860 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 487 transitions. [2021-11-19 05:29:11,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-19 05:29:11,863 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:29:11,863 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 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] [2021-11-19 05:29:11,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-19 05:29:11,864 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:29:11,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:29:11,864 INFO L85 PathProgramCache]: Analyzing trace with hash 148730141, now seen corresponding path program 1 times [2021-11-19 05:29:11,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:29:11,865 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99784471] [2021-11-19 05:29:11,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:29:11,865 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:29:11,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:12,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 05:29:12,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:12,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-19 05:29:12,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:12,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 05:29:12,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:12,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:29:12,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:12,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 05:29:12,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:12,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:29:12,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:12,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-19 05:29:12,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:12,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-19 05:29:12,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:12,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-19 05:29:12,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:12,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-19 05:29:12,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:12,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-19 05:29:12,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:12,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-11-19 05:29:12,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:12,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-11-19 05:29:12,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:12,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-11-19 05:29:12,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:12,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:29:12,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:12,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:29:12,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:12,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2021-11-19 05:29:12,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:12,268 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-11-19 05:29:12,269 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:29:12,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99784471] [2021-11-19 05:29:12,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99784471] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:29:12,270 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:29:12,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-19 05:29:12,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138990798] [2021-11-19 05:29:12,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:29:12,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 05:29:12,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:29:12,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 05:29:12,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-19 05:29:12,273 INFO L87 Difference]: Start difference. First operand 367 states and 487 transitions. Second operand has 9 states, 8 states have (on average 7.125) internal successors, (57), 6 states have internal predecessors, (57), 4 states have call successors, (18), 5 states have call predecessors, (18), 3 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2021-11-19 05:29:13,582 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:29:14,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:29:14,911 INFO L93 Difference]: Finished difference Result 485 states and 646 transitions. [2021-11-19 05:29:14,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-19 05:29:14,911 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 7.125) internal successors, (57), 6 states have internal predecessors, (57), 4 states have call successors, (18), 5 states have call predecessors, (18), 3 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) Word has length 142 [2021-11-19 05:29:14,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:29:14,915 INFO L225 Difference]: With dead ends: 485 [2021-11-19 05:29:14,915 INFO L226 Difference]: Without dead ends: 374 [2021-11-19 05:29:14,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-11-19 05:29:14,917 INFO L933 BasicCegarLoop]: 207 mSDtfsCounter, 144 mSDsluCounter, 750 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 957 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-19 05:29:14,918 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 957 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-11-19 05:29:14,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2021-11-19 05:29:14,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 367. [2021-11-19 05:29:14,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 266 states have (on average 1.1353383458646618) internal successors, (302), 274 states have internal predecessors, (302), 72 states have call successors, (72), 24 states have call predecessors, (72), 28 states have return successors, (112), 68 states have call predecessors, (112), 71 states have call successors, (112) [2021-11-19 05:29:14,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 486 transitions. [2021-11-19 05:29:14,954 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 486 transitions. Word has length 142 [2021-11-19 05:29:14,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:29:14,954 INFO L470 AbstractCegarLoop]: Abstraction has 367 states and 486 transitions. [2021-11-19 05:29:14,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 7.125) internal successors, (57), 6 states have internal predecessors, (57), 4 states have call successors, (18), 5 states have call predecessors, (18), 3 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2021-11-19 05:29:14,955 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 486 transitions. [2021-11-19 05:29:14,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-19 05:29:14,957 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:29:14,958 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 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] [2021-11-19 05:29:14,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-19 05:29:14,958 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:29:14,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:29:14,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1573992648, now seen corresponding path program 1 times [2021-11-19 05:29:14,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:29:14,959 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339126042] [2021-11-19 05:29:14,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:29:14,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:29:15,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:15,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 05:29:15,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:15,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-19 05:29:15,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:15,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 05:29:15,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:15,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:29:15,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:15,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 05:29:15,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:15,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:29:15,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:15,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-19 05:29:15,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:15,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-19 05:29:15,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:15,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-19 05:29:15,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:15,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-19 05:29:15,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:15,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-19 05:29:15,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:15,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-11-19 05:29:15,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:15,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-11-19 05:29:15,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:15,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-11-19 05:29:15,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:15,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:29:15,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:15,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:29:15,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:15,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-11-19 05:29:15,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:15,440 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2021-11-19 05:29:15,440 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:29:15,440 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339126042] [2021-11-19 05:29:15,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339126042] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:29:15,441 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:29:15,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-19 05:29:15,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047094823] [2021-11-19 05:29:15,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:29:15,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 05:29:15,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:29:15,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 05:29:15,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-11-19 05:29:15,444 INFO L87 Difference]: Start difference. First operand 367 states and 486 transitions. Second operand has 11 states, 10 states have (on average 6.2) internal successors, (62), 6 states have internal predecessors, (62), 2 states have call successors, (18), 5 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 1 states have call successors, (17) [2021-11-19 05:29:17,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:29:17,150 INFO L93 Difference]: Finished difference Result 394 states and 514 transitions. [2021-11-19 05:29:17,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-19 05:29:17,151 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 6.2) internal successors, (62), 6 states have internal predecessors, (62), 2 states have call successors, (18), 5 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 1 states have call successors, (17) Word has length 143 [2021-11-19 05:29:17,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:29:17,153 INFO L225 Difference]: With dead ends: 394 [2021-11-19 05:29:17,154 INFO L226 Difference]: Without dead ends: 392 [2021-11-19 05:29:17,154 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-11-19 05:29:17,155 INFO L933 BasicCegarLoop]: 214 mSDtfsCounter, 192 mSDsluCounter, 1080 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 1294 SdHoareTripleChecker+Invalid, 751 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-19 05:29:17,155 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 1294 Invalid, 751 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 568 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-19 05:29:17,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2021-11-19 05:29:17,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 372. [2021-11-19 05:29:17,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 269 states have (on average 1.1338289962825279) internal successors, (305), 277 states have internal predecessors, (305), 73 states have call successors, (73), 25 states have call predecessors, (73), 29 states have return successors, (113), 69 states have call predecessors, (113), 72 states have call successors, (113) [2021-11-19 05:29:17,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 491 transitions. [2021-11-19 05:29:17,192 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 491 transitions. Word has length 143 [2021-11-19 05:29:17,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:29:17,193 INFO L470 AbstractCegarLoop]: Abstraction has 372 states and 491 transitions. [2021-11-19 05:29:17,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 6.2) internal successors, (62), 6 states have internal predecessors, (62), 2 states have call successors, (18), 5 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 1 states have call successors, (17) [2021-11-19 05:29:17,193 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 491 transitions. [2021-11-19 05:29:17,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-19 05:29:17,196 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:29:17,196 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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] [2021-11-19 05:29:17,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-11-19 05:29:17,197 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:29:17,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:29:17,197 INFO L85 PathProgramCache]: Analyzing trace with hash -874766962, now seen corresponding path program 1 times [2021-11-19 05:29:17,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:29:17,198 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283721198] [2021-11-19 05:29:17,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:29:17,198 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:29:17,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:17,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 05:29:17,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:17,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-19 05:29:17,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:17,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 05:29:17,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:17,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:29:17,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:17,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 05:29:17,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:17,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:29:17,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:17,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-19 05:29:17,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:17,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-19 05:29:17,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:17,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-19 05:29:17,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:17,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-19 05:29:17,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:17,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-19 05:29:17,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:17,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-11-19 05:29:17,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:17,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-11-19 05:29:17,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:17,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-11-19 05:29:17,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:17,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:29:17,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:17,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:29:17,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:17,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-11-19 05:29:17,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:17,688 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2021-11-19 05:29:17,689 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:29:17,689 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283721198] [2021-11-19 05:29:17,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283721198] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:29:17,689 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:29:17,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-19 05:29:17,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095753350] [2021-11-19 05:29:17,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:29:17,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 05:29:17,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:29:17,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 05:29:17,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-11-19 05:29:17,694 INFO L87 Difference]: Start difference. First operand 372 states and 491 transitions. Second operand has 10 states, 9 states have (on average 6.666666666666667) internal successors, (60), 7 states have internal predecessors, (60), 4 states have call successors, (18), 5 states have call predecessors, (18), 3 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2021-11-19 05:29:19,897 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:29:20,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:29:20,774 INFO L93 Difference]: Finished difference Result 490 states and 650 transitions. [2021-11-19 05:29:20,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-19 05:29:20,775 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 6.666666666666667) internal successors, (60), 7 states have internal predecessors, (60), 4 states have call successors, (18), 5 states have call predecessors, (18), 3 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) Word has length 147 [2021-11-19 05:29:20,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:29:20,778 INFO L225 Difference]: With dead ends: 490 [2021-11-19 05:29:20,778 INFO L226 Difference]: Without dead ends: 374 [2021-11-19 05:29:20,779 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2021-11-19 05:29:20,780 INFO L933 BasicCegarLoop]: 206 mSDtfsCounter, 132 mSDsluCounter, 750 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 956 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-11-19 05:29:20,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 956 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-11-19 05:29:20,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2021-11-19 05:29:20,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 373. [2021-11-19 05:29:20,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 270 states have (on average 1.1333333333333333) internal successors, (306), 278 states have internal predecessors, (306), 73 states have call successors, (73), 25 states have call predecessors, (73), 29 states have return successors, (113), 69 states have call predecessors, (113), 72 states have call successors, (113) [2021-11-19 05:29:20,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 492 transitions. [2021-11-19 05:29:20,819 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 492 transitions. Word has length 147 [2021-11-19 05:29:20,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:29:20,819 INFO L470 AbstractCegarLoop]: Abstraction has 373 states and 492 transitions. [2021-11-19 05:29:20,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 6.666666666666667) internal successors, (60), 7 states have internal predecessors, (60), 4 states have call successors, (18), 5 states have call predecessors, (18), 3 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2021-11-19 05:29:20,820 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 492 transitions. [2021-11-19 05:29:20,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-19 05:29:20,823 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:29:20,823 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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] [2021-11-19 05:29:20,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-11-19 05:29:20,824 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:29:20,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:29:20,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1614049972, now seen corresponding path program 1 times [2021-11-19 05:29:20,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:29:20,825 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019545016] [2021-11-19 05:29:20,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:29:20,825 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:29:20,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:21,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 05:29:21,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:21,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-19 05:29:21,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:21,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 05:29:21,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:21,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:29:21,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:21,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 05:29:21,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:21,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:29:21,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:21,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-19 05:29:21,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:21,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-19 05:29:21,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:21,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-19 05:29:21,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:21,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-19 05:29:21,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:21,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-19 05:29:21,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:21,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-11-19 05:29:21,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:21,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-11-19 05:29:21,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:21,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-11-19 05:29:21,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:21,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:29:21,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:21,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:29:21,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:21,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2021-11-19 05:29:21,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:21,466 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2021-11-19 05:29:21,467 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:29:21,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019545016] [2021-11-19 05:29:21,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019545016] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:29:21,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929831746] [2021-11-19 05:29:21,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:29:21,468 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:29:21,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:29:21,470 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:29:21,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-19 05:29:21,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:21,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 2741 conjuncts, 64 conjunts are in the unsatisfiable core [2021-11-19 05:29:22,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:29:22,218 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 18 treesize of output 14 [2021-11-19 05:29:22,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:29:22,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:29:22,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:29:22,761 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 05:29:22,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 60 [2021-11-19 05:29:22,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:29:22,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:29:22,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 05:29:22,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:29:22,784 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-11-19 05:29:22,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 60 treesize of output 45 [2021-11-19 05:29:22,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:29:22,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 05:29:22,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:29:22,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 05:29:22,802 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-19 05:29:22,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 44 [2021-11-19 05:29:23,728 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 111 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-19 05:29:23,728 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 05:29:23,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929831746] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:29:23,729 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 05:29:23,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [12] total 27 [2021-11-19 05:29:23,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677408018] [2021-11-19 05:29:23,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:29:23,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-19 05:29:23,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:29:23,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-19 05:29:23,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2021-11-19 05:29:23,731 INFO L87 Difference]: Start difference. First operand 373 states and 492 transitions. Second operand has 17 states, 16 states have (on average 5.9375) internal successors, (95), 16 states have internal predecessors, (95), 6 states have call successors, (18), 3 states have call predecessors, (18), 6 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2021-11-19 05:29:24,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:29:24,483 INFO L93 Difference]: Finished difference Result 698 states and 953 transitions. [2021-11-19 05:29:24,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-19 05:29:24,484 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 5.9375) internal successors, (95), 16 states have internal predecessors, (95), 6 states have call successors, (18), 3 states have call predecessors, (18), 6 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) Word has length 149 [2021-11-19 05:29:24,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:29:24,489 INFO L225 Difference]: With dead ends: 698 [2021-11-19 05:29:24,489 INFO L226 Difference]: Without dead ends: 471 [2021-11-19 05:29:24,491 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 158 SyntacticMatches, 6 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=86, Invalid=726, Unknown=0, NotChecked=0, Total=812 [2021-11-19 05:29:24,492 INFO L933 BasicCegarLoop]: 337 mSDtfsCounter, 77 mSDsluCounter, 2180 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 2517 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 156 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 05:29:24,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 2517 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 235 Invalid, 0 Unknown, 156 Unchecked, 0.6s Time] [2021-11-19 05:29:24,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2021-11-19 05:29:24,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 388. [2021-11-19 05:29:24,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 284 states have (on average 1.1267605633802817) internal successors, (320), 292 states have internal predecessors, (320), 73 states have call successors, (73), 26 states have call predecessors, (73), 30 states have return successors, (113), 69 states have call predecessors, (113), 72 states have call successors, (113) [2021-11-19 05:29:24,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 506 transitions. [2021-11-19 05:29:24,538 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 506 transitions. Word has length 149 [2021-11-19 05:29:24,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:29:24,539 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 506 transitions. [2021-11-19 05:29:24,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 5.9375) internal successors, (95), 16 states have internal predecessors, (95), 6 states have call successors, (18), 3 states have call predecessors, (18), 6 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2021-11-19 05:29:24,540 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 506 transitions. [2021-11-19 05:29:24,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-19 05:29:24,543 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:29:24,543 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:29:24,592 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-19 05:29:24,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:29:24,766 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:29:24,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:29:24,767 INFO L85 PathProgramCache]: Analyzing trace with hash -891040382, now seen corresponding path program 1 times [2021-11-19 05:29:24,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:29:24,767 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239897518] [2021-11-19 05:29:24,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:29:24,767 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:29:24,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:25,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 05:29:25,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:25,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-19 05:29:25,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:25,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 05:29:25,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:25,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:29:25,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:25,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 05:29:25,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:25,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:29:25,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:25,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-19 05:29:25,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:25,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-19 05:29:25,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:25,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-19 05:29:25,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:25,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-19 05:29:25,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:25,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-11-19 05:29:25,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:25,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-19 05:29:25,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:25,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-11-19 05:29:25,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:25,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-11-19 05:29:25,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:25,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-11-19 05:29:25,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:25,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:29:25,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:25,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:29:25,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:25,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2021-11-19 05:29:25,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:25,420 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2021-11-19 05:29:25,420 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:29:25,421 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239897518] [2021-11-19 05:29:25,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239897518] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:29:25,421 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32095631] [2021-11-19 05:29:25,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:29:25,422 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:29:25,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:29:25,426 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:29:25,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-19 05:29:25,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:25,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 2758 conjuncts, 90 conjunts are in the unsatisfiable core [2021-11-19 05:29:25,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:29:25,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-19 05:29:26,104 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 18 treesize of output 14 [2021-11-19 05:29:26,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:29:26,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 60 [2021-11-19 05:29:26,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:29:26,520 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-11-19 05:29:26,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 45 [2021-11-19 05:29:26,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:29:26,541 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-19 05:29:26,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 44 [2021-11-19 05:29:26,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:29:26,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:29:26,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:29:26,764 INFO L354 Elim1Store]: treesize reduction 60, result has 39.4 percent of original size [2021-11-19 05:29:26,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 56 treesize of output 67 [2021-11-19 05:29:46,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:29:46,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:29:46,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 05:29:46,670 INFO L354 Elim1Store]: treesize reduction 80, result has 38.5 percent of original size [2021-11-19 05:29:46,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 91 treesize of output 104 [2021-11-19 05:29:46,676 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 101 treesize of output 86 [2021-11-19 05:29:49,454 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_byte_buf_advance_~output#1.base_BEFORE_CALL_11| Int) (|v_ULTIMATE.start_aws_byte_buf_advance_~buffer#1.base_BEFORE_CALL_3| Int)) (and (let ((.cse8 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_buf_advance_~buffer#1.base_BEFORE_CALL_3|))) (let ((.cse1 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_buf_advance_~output#1.base_BEFORE_CALL_11|)) (.cse0 (select .cse8 24)) (.cse2 (not (= (select .cse8 8) 0)))) (or (and (= .cse0 (select .cse1 24)) .cse2) (exists ((|ULTIMATE.start_aws_byte_buf_advance_harness_~#output~0#1.offset| Int)) (let ((.cse3 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_buf_advance_~output#1.base_BEFORE_CALL_11|))) (let ((.cse7 (select .cse3 (+ 8 |ULTIMATE.start_aws_byte_buf_advance_harness_~#output~0#1.offset|)))) (and (let ((.cse5 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_buf_advance_~buffer#1.base_BEFORE_CALL_3|))) (let ((.cse4 (+ |ULTIMATE.start_aws_byte_buf_advance_harness_~#output~0#1.offset| 24)) (.cse6 (= (select .cse5 8) .cse7))) (or (= (select .cse3 .cse4) (select .cse5 24)) (and .cse6 (= .cse4 0)) (and (= (+ 16 |ULTIMATE.start_aws_byte_buf_advance_harness_~#output~0#1.offset|) 0) .cse6)))) (not (= .cse7 0)))))) (and (= (select .cse1 16) .cse0) .cse2)))) (not (= |v_ULTIMATE.start_aws_byte_buf_advance_~buffer#1.base_BEFORE_CALL_3| |v_ULTIMATE.start_aws_byte_buf_advance_~output#1.base_BEFORE_CALL_11|)))) is different from true [2021-11-19 05:30:03,076 WARN L860 $PredicateComparison]: unable to prove that (or (exists ((aux_mod_memset_impl_~i~6_43 Int) (memset_impl_~sp~0.offset Int)) (let ((.cse0 (+ memset_impl_~sp~0.offset (- 18446744073709551616) (mod aux_mod_memset_impl_~i~6_43 18446744073709551616)))) (and (< 9223372036854775807 aux_mod_memset_impl_~i~6_43) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_memset_impl_#in~s.base| (store (select |c_old(#memory_$Pointer$.offset)| |c_memset_impl_#in~s.base|) .cse0 (select (select |c_#memory_$Pointer$.offset| |c_memset_impl_#in~s.base|) .cse0)))) (< aux_mod_memset_impl_~i~6_43 18446744073709551616) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_memset_impl_#in~s.base| (store (select |c_old(#memory_$Pointer$.base)| |c_memset_impl_#in~s.base|) .cse0 (select (select |c_#memory_$Pointer$.base| |c_memset_impl_#in~s.base|) .cse0))))))) (exists ((aux_mod_memset_impl_~i~6_43 Int) (memset_impl_~sp~0.offset Int)) (let ((.cse1 (+ memset_impl_~sp~0.offset (mod aux_mod_memset_impl_~i~6_43 18446744073709551616)))) (and (= (store |c_old(#memory_$Pointer$.base)| |c_memset_impl_#in~s.base| (store (select |c_old(#memory_$Pointer$.base)| |c_memset_impl_#in~s.base|) .cse1 (select (select |c_#memory_$Pointer$.base| |c_memset_impl_#in~s.base|) .cse1))) |c_#memory_$Pointer$.base|) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_memset_impl_#in~s.base| (store (select |c_old(#memory_$Pointer$.offset)| |c_memset_impl_#in~s.base|) .cse1 (select (select |c_#memory_$Pointer$.offset| |c_memset_impl_#in~s.base|) .cse1)))) (<= aux_mod_memset_impl_~i~6_43 9223372036854775807) (<= 0 aux_mod_memset_impl_~i~6_43))))) is different from true [2021-11-19 05:30:05,347 WARN L860 $PredicateComparison]: unable to prove that (or (exists ((aux_mod_memset_impl_~i~6_43 Int) (memset_impl_~sp~0.offset Int)) (let ((.cse0 (+ memset_impl_~sp~0.offset (- 18446744073709551616) (mod aux_mod_memset_impl_~i~6_43 18446744073709551616)))) (and (< 9223372036854775807 aux_mod_memset_impl_~i~6_43) (< aux_mod_memset_impl_~i~6_43 18446744073709551616) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_my_memset_#in~s.base| (store (select |c_old(#memory_$Pointer$.offset)| |c_my_memset_#in~s.base|) .cse0 (select (select |c_#memory_$Pointer$.offset| |c_my_memset_#in~s.base|) .cse0)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_my_memset_#in~s.base| (store (select |c_old(#memory_$Pointer$.base)| |c_my_memset_#in~s.base|) .cse0 (select (select |c_#memory_$Pointer$.base| |c_my_memset_#in~s.base|) .cse0))))))) (exists ((aux_mod_memset_impl_~i~6_43 Int) (memset_impl_~sp~0.offset Int)) (let ((.cse1 (+ memset_impl_~sp~0.offset (mod aux_mod_memset_impl_~i~6_43 18446744073709551616)))) (and (<= aux_mod_memset_impl_~i~6_43 9223372036854775807) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_my_memset_#in~s.base| (store (select |c_old(#memory_$Pointer$.offset)| |c_my_memset_#in~s.base|) .cse1 (select (select |c_#memory_$Pointer$.offset| |c_my_memset_#in~s.base|) .cse1)))) (<= 0 aux_mod_memset_impl_~i~6_43) (= (store |c_old(#memory_$Pointer$.base)| |c_my_memset_#in~s.base| (store (select |c_old(#memory_$Pointer$.base)| |c_my_memset_#in~s.base|) .cse1 (select (select |c_#memory_$Pointer$.base| |c_my_memset_#in~s.base|) .cse1))) |c_#memory_$Pointer$.base|))))) is different from true [2021-11-19 05:30:05,506 INFO L354 Elim1Store]: treesize reduction 95, result has 16.7 percent of original size [2021-11-19 05:30:05,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 157 treesize of output 167 [2021-11-19 05:30:05,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:30:05,618 INFO L354 Elim1Store]: treesize reduction 368, result has 22.9 percent of original size [2021-11-19 05:30:05,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 14 case distinctions, treesize of input 167 treesize of output 251 [2021-11-19 05:30:06,446 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 29 treesize of output 15 [2021-11-19 05:30:06,534 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 31 treesize of output 16 [2021-11-19 05:30:09,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:30:09,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:30:09,719 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 157 treesize of output 111 [2021-11-19 05:30:09,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:30:09,933 INFO L354 Elim1Store]: treesize reduction 14, result has 67.4 percent of original size [2021-11-19 05:30:09,933 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 3 case distinctions, treesize of input 141 treesize of output 112 [2021-11-19 05:30:20,777 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 39 proven. 91 refuted. 8 times theorem prover too weak. 16 trivial. 4 not checked. [2021-11-19 05:30:20,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:30:21,563 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Some non-self update cases but no top-level DER relation [2021-11-19 05:30:21,564 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-19 05:30:21,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-11-19 05:30:21,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019058864] [2021-11-19 05:30:21,566 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-19 05:30:21,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 05:30:21,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:30:21,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 05:30:21,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1831, Unknown=11, NotChecked=264, Total=2256 [2021-11-19 05:30:21,569 INFO L87 Difference]: Start difference. First operand 388 states and 506 transitions. Second operand has 11 states, 10 states have (on average 6.4) internal successors, (64), 8 states have internal predecessors, (64), 4 states have call successors, (19), 5 states have call predecessors, (19), 3 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-19 05:30:21,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-19 05:30:21,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 156 SyntacticMatches, 11 SemanticMatches, 46 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 38.9s TimeCoverageRelationStatistics Valid=150, Invalid=1831, Unknown=11, NotChecked=264, Total=2256 [2021-11-19 05:30:21,572 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 05:30:21,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 05:30:21,612 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-19 05:30:21,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:30:21,787 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@57ad8825 at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:359) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:206) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:131) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker$ProtectedHtc.checkInternal(ChainingHoareTripleChecker.java:436) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker.checkInternal(ChainingHoareTripleChecker.java:98) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:95) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:357) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.addOtherSuccessors(DeterministicInterpolantAutomaton.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:78) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:868) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:784) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-19 05:30:21,790 INFO L158 Benchmark]: Toolchain (without parser) took 177803.91ms. Allocated memory was 94.4MB in the beginning and 513.8MB in the end (delta: 419.4MB). Free memory was 49.5MB in the beginning and 222.4MB in the end (delta: -172.9MB). Peak memory consumption was 248.1MB. Max. memory is 16.1GB. [2021-11-19 05:30:21,790 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 94.4MB. Free memory was 66.6MB in the beginning and 66.6MB in the end (delta: 25.4kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 05:30:21,791 INFO L158 Benchmark]: CACSL2BoogieTranslator took 3763.48ms. Allocated memory was 94.4MB in the beginning and 186.6MB in the end (delta: 92.3MB). Free memory was 49.5MB in the beginning and 107.4MB in the end (delta: -57.9MB). Peak memory consumption was 53.5MB. Max. memory is 16.1GB. [2021-11-19 05:30:21,791 INFO L158 Benchmark]: Boogie Procedure Inliner took 315.41ms. Allocated memory is still 186.6MB. Free memory was 107.4MB in the beginning and 95.7MB in the end (delta: 11.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-19 05:30:21,791 INFO L158 Benchmark]: Boogie Preprocessor took 161.96ms. Allocated memory is still 186.6MB. Free memory was 95.7MB in the beginning and 88.5MB in the end (delta: 7.2MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-11-19 05:30:21,792 INFO L158 Benchmark]: RCFGBuilder took 2675.58ms. Allocated memory is still 186.6MB. Free memory was 88.3MB in the beginning and 119.0MB in the end (delta: -30.7MB). Peak memory consumption was 34.0MB. Max. memory is 16.1GB. [2021-11-19 05:30:21,792 INFO L158 Benchmark]: TraceAbstraction took 170877.40ms. Allocated memory was 186.6MB in the beginning and 513.8MB in the end (delta: 327.2MB). Free memory was 117.9MB in the beginning and 222.4MB in the end (delta: -104.5MB). Peak memory consumption was 223.2MB. Max. memory is 16.1GB. [2021-11-19 05:30:21,794 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 94.4MB. Free memory was 66.6MB in the beginning and 66.6MB in the end (delta: 25.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 3763.48ms. Allocated memory was 94.4MB in the beginning and 186.6MB in the end (delta: 92.3MB). Free memory was 49.5MB in the beginning and 107.4MB in the end (delta: -57.9MB). Peak memory consumption was 53.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 315.41ms. Allocated memory is still 186.6MB. Free memory was 107.4MB in the beginning and 95.7MB in the end (delta: 11.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Preprocessor took 161.96ms. Allocated memory is still 186.6MB. Free memory was 95.7MB in the beginning and 88.5MB in the end (delta: 7.2MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * RCFGBuilder took 2675.58ms. Allocated memory is still 186.6MB. Free memory was 88.3MB in the beginning and 119.0MB in the end (delta: -30.7MB). Peak memory consumption was 34.0MB. Max. memory is 16.1GB. * TraceAbstraction took 170877.40ms. Allocated memory was 186.6MB in the beginning and 513.8MB in the end (delta: 327.2MB). Free memory was 117.9MB in the beginning and 222.4MB in the end (delta: -104.5MB). Peak memory consumption was 223.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@57ad8825 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@57ad8825: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-19 05:30:21,863 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/config/AutomizerReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_advance_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/config/svcomp-Reach-64bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL --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 9a96b91703f0cc76adc9b0fdbd8386a96920c1be21a810b6415a59c2166f1461 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 05:30:24,313 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 05:30:24,316 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 05:30:24,354 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 05:30:24,355 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 05:30:24,357 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 05:30:24,359 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 05:30:24,363 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 05:30:24,365 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 05:30:24,366 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 05:30:24,368 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 05:30:24,370 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 05:30:24,371 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 05:30:24,376 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 05:30:24,378 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 05:30:24,383 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 05:30:24,387 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 05:30:24,388 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 05:30:24,395 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 05:30:24,401 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 05:30:24,406 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 05:30:24,408 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 05:30:24,409 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 05:30:24,412 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 05:30:24,417 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 05:30:24,426 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 05:30:24,426 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 05:30:24,428 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 05:30:24,428 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 05:30:24,429 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 05:30:24,430 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 05:30:24,431 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 05:30:24,432 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 05:30:24,434 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 05:30:24,436 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 05:30:24,436 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 05:30:24,437 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 05:30:24,438 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 05:30:24,439 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 05:30:24,440 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 05:30:24,441 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 05:30:24,443 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/config/svcomp-Reach-64bit-Automizer_Bitvector.epf [2021-11-19 05:30:24,471 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 05:30:24,471 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 05:30:24,472 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-19 05:30:24,472 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-19 05:30:24,473 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 05:30:24,473 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 05:30:24,474 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-19 05:30:24,474 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-19 05:30:24,474 INFO L138 SettingsManager]: * Use SBE=true [2021-11-19 05:30:24,475 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 05:30:24,475 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 05:30:24,475 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 05:30:24,476 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 05:30:24,476 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 05:30:24,476 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 05:30:24,477 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 05:30:24,477 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 05:30:24,477 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 05:30:24,477 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 05:30:24,478 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 05:30:24,478 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 05:30:24,478 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 05:30:24,479 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 05:30:24,479 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 05:30:24,479 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 05:30:24,479 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 05:30:24,480 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-19 05:30:24,480 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 05:30:24,480 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-19 05:30:24,481 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-19 05:30:24,481 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 05:30:24,481 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 05:30:24,482 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 05:30:24,482 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9a96b91703f0cc76adc9b0fdbd8386a96920c1be21a810b6415a59c2166f1461 [2021-11-19 05:30:24,894 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 05:30:24,932 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 05:30:24,936 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 05:30:24,938 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 05:30:24,939 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 05:30:24,940 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/../../sv-benchmarks/c/aws-c-common/aws_byte_buf_advance_harness.i [2021-11-19 05:30:25,036 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/data/e42e6a3c2/782ef182160a4b80aa60fc3c394f25f4/FLAGc99d88028 [2021-11-19 05:30:26,137 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 05:30:26,138 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/sv-benchmarks/c/aws-c-common/aws_byte_buf_advance_harness.i [2021-11-19 05:30:26,194 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/data/e42e6a3c2/782ef182160a4b80aa60fc3c394f25f4/FLAGc99d88028 [2021-11-19 05:30:26,532 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/data/e42e6a3c2/782ef182160a4b80aa60fc3c394f25f4 [2021-11-19 05:30:26,536 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 05:30:26,540 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 05:30:26,542 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 05:30:26,542 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 05:30:26,547 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 05:30:26,548 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:30:26" (1/1) ... [2021-11-19 05:30:26,550 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@dc0f472 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:30:26, skipping insertion in model container [2021-11-19 05:30:26,550 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:30:26" (1/1) ... [2021-11-19 05:30:26,558 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 05:30:26,710 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 05:30:27,139 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/sv-benchmarks/c/aws-c-common/aws_byte_buf_advance_harness.i[4494,4507] [2021-11-19 05:30:27,147 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/sv-benchmarks/c/aws-c-common/aws_byte_buf_advance_harness.i[4554,4567] [2021-11-19 05:30:27,175 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-19 05:30:27,182 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-19 05:30:28,231 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 05:30:28,232 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 05:30:28,233 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 05:30:28,234 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 05:30:28,235 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 05:30:28,253 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 05:30:28,254 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 05:30:28,256 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 05:30:28,257 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 05:30:28,776 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-19 05:30:28,777 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-19 05:30:28,779 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-19 05:30:28,780 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-19 05:30:28,782 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-19 05:30:28,783 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-19 05:30:28,784 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-19 05:30:28,784 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-19 05:30:28,785 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-19 05:30:28,786 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-19 05:30:29,038 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-19 05:30:29,148 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 05:30:29,148 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 05:30:29,223 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 05:30:29,303 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 05:30:29,334 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/sv-benchmarks/c/aws-c-common/aws_byte_buf_advance_harness.i[4494,4507] [2021-11-19 05:30:29,335 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/sv-benchmarks/c/aws-c-common/aws_byte_buf_advance_harness.i[4554,4567] [2021-11-19 05:30:29,337 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-19 05:30:29,340 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-19 05:30:29,410 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 05:30:29,410 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 05:30:29,411 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 05:30:29,412 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 05:30:29,412 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 05:30:29,421 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 05:30:29,422 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 05:30:29,423 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 05:30:29,424 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 05:30:29,468 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-19 05:30:29,469 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-19 05:30:29,470 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-19 05:30:29,471 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-19 05:30:29,472 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-19 05:30:29,473 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-19 05:30:29,474 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-19 05:30:29,474 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-19 05:30:29,475 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-19 05:30:29,475 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-19 05:30:29,501 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-19 05:30:29,605 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 05:30:29,605 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 05:30:29,663 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 05:30:30,082 INFO L208 MainTranslator]: Completed translation [2021-11-19 05:30:30,082 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:30:30 WrapperNode [2021-11-19 05:30:30,082 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 05:30:30,083 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 05:30:30,084 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 05:30:30,084 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 05:30:30,091 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:30:30" (1/1) ... [2021-11-19 05:30:30,250 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:30:30" (1/1) ... [2021-11-19 05:30:30,365 INFO L137 Inliner]: procedures = 713, calls = 2679, calls flagged for inlining = 60, calls inlined = 8, statements flattened = 969 [2021-11-19 05:30:30,366 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 05:30:30,367 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 05:30:30,367 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 05:30:30,367 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 05:30:30,376 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:30:30" (1/1) ... [2021-11-19 05:30:30,376 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:30:30" (1/1) ... [2021-11-19 05:30:30,393 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:30:30" (1/1) ... [2021-11-19 05:30:30,393 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:30:30" (1/1) ... [2021-11-19 05:30:30,471 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:30:30" (1/1) ... [2021-11-19 05:30:30,489 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:30:30" (1/1) ... [2021-11-19 05:30:30,502 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:30:30" (1/1) ... [2021-11-19 05:30:30,516 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 05:30:30,517 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 05:30:30,517 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 05:30:30,517 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 05:30:30,518 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:30:30" (1/1) ... [2021-11-19 05:30:30,526 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 05:30:30,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:30:30,553 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 05:30:30,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 05:30:30,641 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_valid [2021-11-19 05:30:30,641 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_valid [2021-11-19 05:30:30,641 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-19 05:30:30,642 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-11-19 05:30:30,642 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-11-19 05:30:30,642 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 05:30:30,642 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-19 05:30:30,642 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-19 05:30:30,643 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-19 05:30:30,643 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-19 05:30:30,643 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-19 05:30:30,643 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 05:30:30,643 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-19 05:30:30,644 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_byte_buf_has_allocated_buffer_member [2021-11-19 05:30:30,644 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_byte_buf_has_allocated_buffer_member [2021-11-19 05:30:30,644 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 05:30:30,644 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 05:30:30,644 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-11-19 05:30:30,645 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-11-19 05:30:30,645 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-19 05:30:30,645 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2021-11-19 05:30:30,645 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2021-11-19 05:30:30,645 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-19 05:30:30,646 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-19 05:30:30,646 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-19 05:30:30,646 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 05:30:30,646 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-19 05:30:30,646 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-19 05:30:30,647 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-19 05:30:30,647 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-19 05:30:30,647 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2021-11-19 05:30:30,647 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2021-11-19 05:30:30,647 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_bounded [2021-11-19 05:30:30,648 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_bounded [2021-11-19 05:30:30,648 INFO L130 BoogieDeclarations]: Found specification of procedure memset_impl [2021-11-19 05:30:30,648 INFO L138 BoogieDeclarations]: Found implementation of procedure memset_impl [2021-11-19 05:30:30,648 INFO L130 BoogieDeclarations]: Found specification of procedure my_memset [2021-11-19 05:30:30,648 INFO L138 BoogieDeclarations]: Found implementation of procedure my_memset [2021-11-19 05:30:31,108 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 05:30:31,110 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 05:30:36,659 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 05:30:36,679 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 05:30:36,679 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-19 05:30:36,682 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:30:36 BoogieIcfgContainer [2021-11-19 05:30:36,683 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 05:30:36,688 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 05:30:36,688 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 05:30:36,691 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 05:30:36,692 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:30:26" (1/3) ... [2021-11-19 05:30:36,693 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7277ad88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:30:36, skipping insertion in model container [2021-11-19 05:30:36,695 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:30:30" (2/3) ... [2021-11-19 05:30:36,695 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7277ad88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:30:36, skipping insertion in model container [2021-11-19 05:30:36,695 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:30:36" (3/3) ... [2021-11-19 05:30:36,697 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_byte_buf_advance_harness.i [2021-11-19 05:30:36,704 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 05:30:36,705 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 05:30:36,779 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 05:30:36,787 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 [2021-11-19 05:30:36,787 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 05:30:36,812 INFO L276 IsEmpty]: Start isEmpty. Operand has 173 states, 106 states have (on average 1.2264150943396226) internal successors, (130), 106 states have internal predecessors, (130), 55 states have call successors, (55), 11 states have call predecessors, (55), 11 states have return successors, (55), 55 states have call predecessors, (55), 55 states have call successors, (55) [2021-11-19 05:30:36,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-19 05:30:36,832 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:30:36,833 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 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] [2021-11-19 05:30:36,833 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:30:36,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:30:36,840 INFO L85 PathProgramCache]: Analyzing trace with hash -851421027, now seen corresponding path program 1 times [2021-11-19 05:30:36,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 05:30:36,861 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [889154195] [2021-11-19 05:30:36,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:30:36,862 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 05:30:36,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 05:30:36,870 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 05:30:36,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 05:30:37,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:30:37,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 1349 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-19 05:30:38,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:30:38,344 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-11-19 05:30:38,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:30:38,589 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-19 05:30:38,590 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 05:30:38,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [889154195] [2021-11-19 05:30:38,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [889154195] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 05:30:38,598 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:30:38,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-19 05:30:38,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354215636] [2021-11-19 05:30:38,601 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 05:30:38,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-19 05:30:38,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 05:30:38,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-19 05:30:38,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 05:30:38,659 INFO L87 Difference]: Start difference. First operand has 173 states, 106 states have (on average 1.2264150943396226) internal successors, (130), 106 states have internal predecessors, (130), 55 states have call successors, (55), 11 states have call predecessors, (55), 11 states have return successors, (55), 55 states have call predecessors, (55), 55 states have call successors, (55) Second operand has 2 states, 2 states have (on average 19.0) internal successors, (38), 2 states have internal predecessors, (38), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 05:30:38,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:30:38,751 INFO L93 Difference]: Finished difference Result 342 states and 513 transitions. [2021-11-19 05:30:38,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-19 05:30:38,753 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 19.0) internal successors, (38), 2 states have internal predecessors, (38), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 89 [2021-11-19 05:30:38,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:30:38,770 INFO L225 Difference]: With dead ends: 342 [2021-11-19 05:30:38,770 INFO L226 Difference]: Without dead ends: 168 [2021-11-19 05:30:38,782 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 05:30:38,786 INFO L933 BasicCegarLoop]: 235 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 05:30:38,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 05:30:38,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-11-19 05:30:38,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2021-11-19 05:30:38,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 101 states have (on average 1.198019801980198) internal successors, (121), 102 states have internal predecessors, (121), 55 states have call successors, (55), 11 states have call predecessors, (55), 11 states have return successors, (54), 54 states have call predecessors, (54), 54 states have call successors, (54) [2021-11-19 05:30:38,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 230 transitions. [2021-11-19 05:30:38,879 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 230 transitions. Word has length 89 [2021-11-19 05:30:38,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:30:38,881 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 230 transitions. [2021-11-19 05:30:38,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 19.0) internal successors, (38), 2 states have internal predecessors, (38), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 05:30:38,881 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 230 transitions. [2021-11-19 05:30:38,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-19 05:30:38,895 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:30:38,896 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 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] [2021-11-19 05:30:38,938 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-19 05:30:39,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 05:30:39,119 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:30:39,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:30:39,119 INFO L85 PathProgramCache]: Analyzing trace with hash -2005321356, now seen corresponding path program 1 times [2021-11-19 05:30:39,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 05:30:39,123 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1627583102] [2021-11-19 05:30:39,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:30:39,123 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 05:30:39,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 05:30:39,126 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 05:30:39,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 05:30:40,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:30:40,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 1381 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 05:30:40,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:30:40,472 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-19 05:30:40,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:30:40,909 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-19 05:30:40,909 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 05:30:40,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1627583102] [2021-11-19 05:30:40,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1627583102] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 05:30:40,910 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 05:30:40,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 5 [2021-11-19 05:30:40,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912929069] [2021-11-19 05:30:40,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:30:40,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 05:30:40,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 05:30:40,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 05:30:40,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-19 05:30:40,914 INFO L87 Difference]: Start difference. First operand 168 states and 230 transitions. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-19 05:30:41,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:30:41,702 INFO L93 Difference]: Finished difference Result 332 states and 462 transitions. [2021-11-19 05:30:41,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 05:30:41,704 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 96 [2021-11-19 05:30:41,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:30:41,709 INFO L225 Difference]: With dead ends: 332 [2021-11-19 05:30:41,710 INFO L226 Difference]: Without dead ends: 171 [2021-11-19 05:30:41,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-19 05:30:41,712 INFO L933 BasicCegarLoop]: 211 mSDtfsCounter, 76 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 532 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 05:30:41,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 532 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 05:30:41,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-11-19 05:30:41,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2021-11-19 05:30:41,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 103 states have (on average 1.1941747572815533) internal successors, (123), 105 states have internal predecessors, (123), 55 states have call successors, (55), 11 states have call predecessors, (55), 12 states have return successors, (63), 54 states have call predecessors, (63), 54 states have call successors, (63) [2021-11-19 05:30:41,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 241 transitions. [2021-11-19 05:30:41,740 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 241 transitions. Word has length 96 [2021-11-19 05:30:41,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:30:41,741 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 241 transitions. [2021-11-19 05:30:41,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-19 05:30:41,741 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 241 transitions. [2021-11-19 05:30:41,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-19 05:30:41,743 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:30:41,744 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:30:41,780 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 05:30:41,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 05:30:41,966 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:30:41,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:30:41,967 INFO L85 PathProgramCache]: Analyzing trace with hash -304504407, now seen corresponding path program 1 times [2021-11-19 05:30:41,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 05:30:41,970 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1948957301] [2021-11-19 05:30:41,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:30:41,971 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 05:30:41,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 05:30:41,972 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 05:30:41,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 05:30:42,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:30:42,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 1394 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-19 05:30:42,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:30:43,211 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 18 treesize of output 14 [2021-11-19 05:30:44,508 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-19 05:30:44,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:30:45,803 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 40 treesize of output 34 [2021-11-19 05:30:45,999 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-19 05:30:45,999 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 05:30:46,000 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1948957301] [2021-11-19 05:30:46,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1948957301] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 05:30:46,000 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 05:30:46,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [11] total 18 [2021-11-19 05:30:46,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856539557] [2021-11-19 05:30:46,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:30:46,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 05:30:46,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 05:30:46,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 05:30:46,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-11-19 05:30:46,003 INFO L87 Difference]: Start difference. First operand 171 states and 241 transitions. Second operand has 13 states, 12 states have (on average 4.25) internal successors, (51), 10 states have internal predecessors, (51), 5 states have call successors, (16), 3 states have call predecessors, (16), 5 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2021-11-19 05:30:48,123 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:30:50,441 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:30:50,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:30:50,595 INFO L93 Difference]: Finished difference Result 355 states and 495 transitions. [2021-11-19 05:30:50,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-19 05:30:50,597 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 4.25) internal successors, (51), 10 states have internal predecessors, (51), 5 states have call successors, (16), 3 states have call predecessors, (16), 5 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) Word has length 102 [2021-11-19 05:30:50,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:30:50,600 INFO L225 Difference]: With dead ends: 355 [2021-11-19 05:30:50,600 INFO L226 Difference]: Without dead ends: 184 [2021-11-19 05:30:50,601 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-11-19 05:30:50,602 INFO L933 BasicCegarLoop]: 224 mSDtfsCounter, 18 mSDsluCounter, 1783 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 2007 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 170 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2021-11-19 05:30:50,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 2007 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 56 Invalid, 1 Unknown, 170 Unchecked, 4.5s Time] [2021-11-19 05:30:50,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-11-19 05:30:50,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2021-11-19 05:30:50,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 115 states have (on average 1.2) internal successors, (138), 117 states have internal predecessors, (138), 55 states have call successors, (55), 12 states have call predecessors, (55), 13 states have return successors, (64), 54 states have call predecessors, (64), 54 states have call successors, (64) [2021-11-19 05:30:50,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 257 transitions. [2021-11-19 05:30:50,625 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 257 transitions. Word has length 102 [2021-11-19 05:30:50,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:30:50,626 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 257 transitions. [2021-11-19 05:30:50,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 4.25) internal successors, (51), 10 states have internal predecessors, (51), 5 states have call successors, (16), 3 states have call predecessors, (16), 5 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2021-11-19 05:30:50,626 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 257 transitions. [2021-11-19 05:30:50,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-19 05:30:50,628 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:30:50,629 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:30:50,664 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-19 05:30:50,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 05:30:50,842 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:30:50,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:30:50,843 INFO L85 PathProgramCache]: Analyzing trace with hash -358897305, now seen corresponding path program 1 times [2021-11-19 05:30:50,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 05:30:50,845 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [636564158] [2021-11-19 05:30:50,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:30:50,846 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 05:30:50,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 05:30:50,847 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 05:30:50,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 05:30:51,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:30:51,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 1391 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 05:30:51,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:30:52,086 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-19 05:30:52,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:30:52,392 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-19 05:30:52,392 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 05:30:52,393 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [636564158] [2021-11-19 05:30:52,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [636564158] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 05:30:52,393 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 05:30:52,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2021-11-19 05:30:52,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096300571] [2021-11-19 05:30:52,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:30:52,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 05:30:52,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 05:30:52,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 05:30:52,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 05:30:52,396 INFO L87 Difference]: Start difference. First operand 184 states and 257 transitions. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 05:30:52,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:30:52,472 INFO L93 Difference]: Finished difference Result 358 states and 511 transitions. [2021-11-19 05:30:52,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 05:30:52,473 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 102 [2021-11-19 05:30:52,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:30:52,477 INFO L225 Difference]: With dead ends: 358 [2021-11-19 05:30:52,477 INFO L226 Difference]: Without dead ends: 190 [2021-11-19 05:30:52,479 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 05:30:52,480 INFO L933 BasicCegarLoop]: 241 mSDtfsCounter, 20 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 682 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 05:30:52,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 682 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 05:30:52,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-11-19 05:30:52,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 178. [2021-11-19 05:30:52,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 110 states have (on average 1.2) internal successors, (132), 111 states have internal predecessors, (132), 55 states have call successors, (55), 12 states have call predecessors, (55), 12 states have return successors, (63), 54 states have call predecessors, (63), 54 states have call successors, (63) [2021-11-19 05:30:52,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 250 transitions. [2021-11-19 05:30:52,503 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 250 transitions. Word has length 102 [2021-11-19 05:30:52,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:30:52,504 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 250 transitions. [2021-11-19 05:30:52,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 05:30:52,504 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 250 transitions. [2021-11-19 05:30:52,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-19 05:30:52,506 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:30:52,507 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:30:52,544 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-19 05:30:52,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 05:30:52,725 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:30:52,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:30:52,725 INFO L85 PathProgramCache]: Analyzing trace with hash 197444513, now seen corresponding path program 1 times [2021-11-19 05:30:52,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 05:30:52,727 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1871161924] [2021-11-19 05:30:52,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:30:52,737 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 05:30:52,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 05:30:52,738 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 05:30:52,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 05:30:53,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:30:53,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 1403 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 05:30:53,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:30:54,239 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-19 05:30:54,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:30:54,733 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-19 05:30:54,734 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 05:30:54,734 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1871161924] [2021-11-19 05:30:54,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1871161924] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 05:30:54,734 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 05:30:54,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2021-11-19 05:30:54,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264840741] [2021-11-19 05:30:54,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:30:54,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 05:30:54,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 05:30:54,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 05:30:54,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-19 05:30:54,736 INFO L87 Difference]: Start difference. First operand 178 states and 250 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 05:30:56,871 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:30:58,880 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:31:02,611 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.99s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:31:03,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:31:03,841 INFO L93 Difference]: Finished difference Result 364 states and 529 transitions. [2021-11-19 05:31:03,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 05:31:03,843 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 106 [2021-11-19 05:31:03,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:31:03,846 INFO L225 Difference]: With dead ends: 364 [2021-11-19 05:31:03,846 INFO L226 Difference]: Without dead ends: 198 [2021-11-19 05:31:03,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 204 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-19 05:31:03,849 INFO L933 BasicCegarLoop]: 241 mSDtfsCounter, 42 mSDsluCounter, 576 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 817 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 9.0s IncrementalHoareTripleChecker+Time [2021-11-19 05:31:03,849 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 817 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 106 Invalid, 2 Unknown, 51 Unchecked, 9.0s Time] [2021-11-19 05:31:03,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-11-19 05:31:03,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 187. [2021-11-19 05:31:03,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 119 states have (on average 1.2100840336134453) internal successors, (144), 120 states have internal predecessors, (144), 55 states have call successors, (55), 12 states have call predecessors, (55), 12 states have return successors, (63), 54 states have call predecessors, (63), 54 states have call successors, (63) [2021-11-19 05:31:03,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 262 transitions. [2021-11-19 05:31:03,868 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 262 transitions. Word has length 106 [2021-11-19 05:31:03,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:31:03,868 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 262 transitions. [2021-11-19 05:31:03,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 05:31:03,869 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 262 transitions. [2021-11-19 05:31:03,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-19 05:31:03,871 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:31:03,871 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:31:03,901 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-19 05:31:04,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 05:31:04,090 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:31:04,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:31:04,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1488735325, now seen corresponding path program 1 times [2021-11-19 05:31:04,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 05:31:04,093 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2142665709] [2021-11-19 05:31:04,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:31:04,094 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 05:31:04,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 05:31:04,095 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 05:31:04,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 05:31:04,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:31:04,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 1400 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-19 05:31:04,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:31:06,299 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-19 05:31:06,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:31:07,807 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-11-19 05:31:07,808 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 05:31:07,808 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2142665709] [2021-11-19 05:31:07,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2142665709] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 05:31:07,808 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 05:31:07,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [12] total 19 [2021-11-19 05:31:07,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691624867] [2021-11-19 05:31:07,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:31:07,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 05:31:07,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 05:31:07,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 05:31:07,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-11-19 05:31:07,811 INFO L87 Difference]: Start difference. First operand 187 states and 262 transitions. Second operand has 12 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 11 states have internal predecessors, (58), 3 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-19 05:31:09,927 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:31:11,937 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:31:14,812 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:31:17,657 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:31:19,467 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.81s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:31:19,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:31:19,871 INFO L93 Difference]: Finished difference Result 372 states and 547 transitions. [2021-11-19 05:31:19,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 05:31:19,873 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 11 states have internal predecessors, (58), 3 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 106 [2021-11-19 05:31:19,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:31:19,877 INFO L225 Difference]: With dead ends: 372 [2021-11-19 05:31:19,878 INFO L226 Difference]: Without dead ends: 196 [2021-11-19 05:31:19,880 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 192 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2021-11-19 05:31:19,881 INFO L933 BasicCegarLoop]: 234 mSDtfsCounter, 38 mSDsluCounter, 1943 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 2 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 2177 SdHoareTripleChecker+Invalid, 626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 358 IncrementalHoareTripleChecker+Unchecked, 11.2s IncrementalHoareTripleChecker+Time [2021-11-19 05:31:19,881 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 2177 Invalid, 626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 263 Invalid, 3 Unknown, 358 Unchecked, 11.2s Time] [2021-11-19 05:31:19,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-11-19 05:31:19,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 192. [2021-11-19 05:31:19,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 123 states have (on average 1.1869918699186992) internal successors, (146), 125 states have internal predecessors, (146), 55 states have call successors, (55), 12 states have call predecessors, (55), 13 states have return successors, (73), 54 states have call predecessors, (73), 54 states have call successors, (73) [2021-11-19 05:31:19,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 274 transitions. [2021-11-19 05:31:19,905 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 274 transitions. Word has length 106 [2021-11-19 05:31:19,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:31:19,906 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 274 transitions. [2021-11-19 05:31:19,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 11 states have internal predecessors, (58), 3 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-19 05:31:19,906 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 274 transitions. [2021-11-19 05:31:19,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-19 05:31:19,908 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:31:19,908 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:31:19,939 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-19 05:31:20,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 05:31:20,119 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:31:20,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:31:20,119 INFO L85 PathProgramCache]: Analyzing trace with hash 2105902303, now seen corresponding path program 1 times [2021-11-19 05:31:20,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 05:31:20,121 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [280326925] [2021-11-19 05:31:20,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:31:20,121 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 05:31:20,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 05:31:20,122 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 05:31:20,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-19 05:31:20,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:31:20,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 1401 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 05:31:20,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:31:21,180 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-19 05:31:21,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:31:21,449 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-19 05:31:21,449 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 05:31:21,449 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [280326925] [2021-11-19 05:31:21,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [280326925] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 05:31:21,449 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 05:31:21,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2021-11-19 05:31:21,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573772400] [2021-11-19 05:31:21,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:31:21,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 05:31:21,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 05:31:21,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 05:31:21,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 05:31:21,451 INFO L87 Difference]: Start difference. First operand 192 states and 274 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 05:31:21,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:31:21,520 INFO L93 Difference]: Finished difference Result 376 states and 545 transitions. [2021-11-19 05:31:21,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 05:31:21,521 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 106 [2021-11-19 05:31:21,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:31:21,523 INFO L225 Difference]: With dead ends: 376 [2021-11-19 05:31:21,523 INFO L226 Difference]: Without dead ends: 196 [2021-11-19 05:31:21,525 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 05:31:21,526 INFO L933 BasicCegarLoop]: 227 mSDtfsCounter, 34 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 673 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 05:31:21,526 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 673 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 05:31:21,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-11-19 05:31:21,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 188. [2021-11-19 05:31:21,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 119 states have (on average 1.1680672268907564) internal successors, (139), 121 states have internal predecessors, (139), 55 states have call successors, (55), 12 states have call predecessors, (55), 13 states have return successors, (73), 54 states have call predecessors, (73), 54 states have call successors, (73) [2021-11-19 05:31:21,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 267 transitions. [2021-11-19 05:31:21,545 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 267 transitions. Word has length 106 [2021-11-19 05:31:21,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:31:21,545 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 267 transitions. [2021-11-19 05:31:21,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 05:31:21,546 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 267 transitions. [2021-11-19 05:31:21,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-19 05:31:21,548 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:31:21,548 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:31:21,585 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-19 05:31:21,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 05:31:21,774 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:31:21,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:31:21,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1235124835, now seen corresponding path program 1 times [2021-11-19 05:31:21,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 05:31:21,777 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2135592419] [2021-11-19 05:31:21,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:31:21,777 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 05:31:21,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 05:31:21,778 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 05:31:21,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-19 05:31:22,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:31:22,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 1398 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 05:31:22,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:31:22,988 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-19 05:31:22,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:31:23,439 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-11-19 05:31:23,439 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 05:31:23,439 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2135592419] [2021-11-19 05:31:23,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2135592419] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 05:31:23,439 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 05:31:23,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 10 [2021-11-19 05:31:23,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961959243] [2021-11-19 05:31:23,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:31:23,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 05:31:23,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 05:31:23,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 05:31:23,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-19 05:31:23,441 INFO L87 Difference]: Start difference. First operand 188 states and 267 transitions. Second operand has 9 states, 8 states have (on average 7.25) internal successors, (58), 8 states have internal predecessors, (58), 3 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-19 05:31:23,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:31:23,817 INFO L93 Difference]: Finished difference Result 375 states and 548 transitions. [2021-11-19 05:31:23,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 05:31:23,823 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 7.25) internal successors, (58), 8 states have internal predecessors, (58), 3 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 106 [2021-11-19 05:31:23,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:31:23,825 INFO L225 Difference]: With dead ends: 375 [2021-11-19 05:31:23,826 INFO L226 Difference]: Without dead ends: 197 [2021-11-19 05:31:23,827 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-19 05:31:23,828 INFO L933 BasicCegarLoop]: 217 mSDtfsCounter, 12 mSDsluCounter, 1476 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1693 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 05:31:23,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 1693 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 05:31:23,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-11-19 05:31:23,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 188. [2021-11-19 05:31:23,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 119 states have (on average 1.1680672268907564) internal successors, (139), 121 states have internal predecessors, (139), 55 states have call successors, (55), 12 states have call predecessors, (55), 13 states have return successors, (73), 54 states have call predecessors, (73), 54 states have call successors, (73) [2021-11-19 05:31:23,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 267 transitions. [2021-11-19 05:31:23,850 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 267 transitions. Word has length 106 [2021-11-19 05:31:23,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:31:23,851 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 267 transitions. [2021-11-19 05:31:23,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 7.25) internal successors, (58), 8 states have internal predecessors, (58), 3 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-19 05:31:23,851 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 267 transitions. [2021-11-19 05:31:23,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-19 05:31:23,853 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:31:23,853 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:31:23,894 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-19 05:31:24,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 05:31:24,078 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:31:24,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:31:24,079 INFO L85 PathProgramCache]: Analyzing trace with hash -502310762, now seen corresponding path program 1 times [2021-11-19 05:31:24,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 05:31:24,081 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [257854033] [2021-11-19 05:31:24,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:31:24,081 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 05:31:24,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 05:31:24,082 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 05:31:24,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-19 05:31:24,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:31:24,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 1405 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 05:31:24,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:31:25,235 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-19 05:31:25,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:31:25,670 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-19 05:31:25,671 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 05:31:25,671 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [257854033] [2021-11-19 05:31:25,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [257854033] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 05:31:25,671 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 05:31:25,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 6 [2021-11-19 05:31:25,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488798669] [2021-11-19 05:31:25,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:31:25,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 05:31:25,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 05:31:25,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 05:31:25,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-19 05:31:25,673 INFO L87 Difference]: Start difference. First operand 188 states and 267 transitions. Second operand has 6 states, 5 states have (on average 11.8) internal successors, (59), 6 states have internal predecessors, (59), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-19 05:31:28,699 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:31:29,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:31:29,015 INFO L93 Difference]: Finished difference Result 368 states and 533 transitions. [2021-11-19 05:31:29,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 05:31:29,016 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 11.8) internal successors, (59), 6 states have internal predecessors, (59), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 4 states have call successors, (15) Word has length 108 [2021-11-19 05:31:29,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:31:29,019 INFO L225 Difference]: With dead ends: 368 [2021-11-19 05:31:29,019 INFO L226 Difference]: Without dead ends: 232 [2021-11-19 05:31:29,020 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-19 05:31:29,021 INFO L933 BasicCegarLoop]: 278 mSDtfsCounter, 110 mSDsluCounter, 913 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 71 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 1191 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-11-19 05:31:29,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 1191 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 104 Invalid, 1 Unknown, 0 Unchecked, 3.3s Time] [2021-11-19 05:31:29,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-11-19 05:31:29,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 188. [2021-11-19 05:31:29,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 119 states have (on average 1.1680672268907564) internal successors, (139), 121 states have internal predecessors, (139), 55 states have call successors, (55), 12 states have call predecessors, (55), 13 states have return successors, (71), 54 states have call predecessors, (71), 54 states have call successors, (71) [2021-11-19 05:31:29,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 265 transitions. [2021-11-19 05:31:29,044 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 265 transitions. Word has length 108 [2021-11-19 05:31:29,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:31:29,045 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 265 transitions. [2021-11-19 05:31:29,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 11.8) internal successors, (59), 6 states have internal predecessors, (59), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-19 05:31:29,045 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 265 transitions. [2021-11-19 05:31:29,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-19 05:31:29,047 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:31:29,047 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 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] [2021-11-19 05:31:29,086 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-19 05:31:29,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 05:31:29,270 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:31:29,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:31:29,270 INFO L85 PathProgramCache]: Analyzing trace with hash -1772700981, now seen corresponding path program 1 times [2021-11-19 05:31:29,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 05:31:29,272 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [390695661] [2021-11-19 05:31:29,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:31:29,272 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 05:31:29,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 05:31:29,273 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 05:31:29,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-19 05:31:30,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:31:30,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 1418 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 05:31:30,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:31:30,450 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-19 05:31:30,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:31:30,957 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-11-19 05:31:30,957 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 05:31:30,957 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [390695661] [2021-11-19 05:31:30,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [390695661] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 05:31:30,958 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 05:31:30,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 6 [2021-11-19 05:31:30,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918534658] [2021-11-19 05:31:30,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:31:30,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 05:31:30,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 05:31:30,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 05:31:30,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-19 05:31:30,960 INFO L87 Difference]: Start difference. First operand 188 states and 265 transitions. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-19 05:31:33,861 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:31:34,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:31:34,105 INFO L93 Difference]: Finished difference Result 377 states and 544 transitions. [2021-11-19 05:31:34,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 05:31:34,106 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 114 [2021-11-19 05:31:34,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:31:34,108 INFO L225 Difference]: With dead ends: 377 [2021-11-19 05:31:34,108 INFO L226 Difference]: Without dead ends: 232 [2021-11-19 05:31:34,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-19 05:31:34,110 INFO L933 BasicCegarLoop]: 283 mSDtfsCounter, 109 mSDsluCounter, 673 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 65 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 956 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-11-19 05:31:34,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 956 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 63 Invalid, 1 Unknown, 0 Unchecked, 3.1s Time] [2021-11-19 05:31:34,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-11-19 05:31:34,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 231. [2021-11-19 05:31:34,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 143 states have (on average 1.167832167832168) internal successors, (167), 146 states have internal predecessors, (167), 74 states have call successors, (74), 12 states have call predecessors, (74), 13 states have return successors, (89), 72 states have call predecessors, (89), 73 states have call successors, (89) [2021-11-19 05:31:34,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 330 transitions. [2021-11-19 05:31:34,132 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 330 transitions. Word has length 114 [2021-11-19 05:31:34,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:31:34,133 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 330 transitions. [2021-11-19 05:31:34,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-19 05:31:34,133 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 330 transitions. [2021-11-19 05:31:34,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-19 05:31:34,135 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:31:34,136 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:31:34,178 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-19 05:31:34,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 05:31:34,358 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:31:34,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:31:34,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1611498304, now seen corresponding path program 2 times [2021-11-19 05:31:34,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 05:31:34,360 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1035148991] [2021-11-19 05:31:34,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 05:31:34,361 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 05:31:34,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 05:31:34,362 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 05:31:34,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-19 05:31:34,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-19 05:31:34,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:31:34,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 1194 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 05:31:34,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:31:35,223 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-19 05:31:35,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:31:35,628 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-19 05:31:35,628 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 05:31:35,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1035148991] [2021-11-19 05:31:35,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1035148991] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 05:31:35,629 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:31:35,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-19 05:31:35,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976592202] [2021-11-19 05:31:35,630 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 05:31:35,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 05:31:35,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 05:31:35,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 05:31:35,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-19 05:31:35,632 INFO L87 Difference]: Start difference. First operand 231 states and 330 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 05:31:36,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:31:36,136 INFO L93 Difference]: Finished difference Result 330 states and 468 transitions. [2021-11-19 05:31:36,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 05:31:36,137 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 120 [2021-11-19 05:31:36,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:31:36,139 INFO L225 Difference]: With dead ends: 330 [2021-11-19 05:31:36,139 INFO L226 Difference]: Without dead ends: 231 [2021-11-19 05:31:36,140 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-19 05:31:36,141 INFO L933 BasicCegarLoop]: 225 mSDtfsCounter, 22 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 653 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 05:31:36,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 653 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 05:31:36,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-11-19 05:31:36,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231. [2021-11-19 05:31:36,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 143 states have (on average 1.167832167832168) internal successors, (167), 146 states have internal predecessors, (167), 74 states have call successors, (74), 12 states have call predecessors, (74), 13 states have return successors, (88), 72 states have call predecessors, (88), 73 states have call successors, (88) [2021-11-19 05:31:36,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 329 transitions. [2021-11-19 05:31:36,161 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 329 transitions. Word has length 120 [2021-11-19 05:31:36,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:31:36,162 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 329 transitions. [2021-11-19 05:31:36,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 05:31:36,162 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 329 transitions. [2021-11-19 05:31:36,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-19 05:31:36,164 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:31:36,164 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:31:36,205 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-19 05:31:36,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 05:31:36,382 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:31:36,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:31:36,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1804072683, now seen corresponding path program 1 times [2021-11-19 05:31:36,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 05:31:36,385 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [959458171] [2021-11-19 05:31:36,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:31:36,386 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 05:31:36,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 05:31:36,387 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 05:31:36,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-19 05:31:37,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:31:37,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 1444 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-19 05:31:37,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:31:40,177 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 54 treesize of output 46 [2021-11-19 05:31:40,187 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 05:31:40,187 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 1 case distinctions, treesize of input 45 treesize of output 29 [2021-11-19 05:31:40,193 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 21 [2021-11-19 05:31:40,666 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 88 proven. 18 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-19 05:31:40,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:31:41,999 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 [2021-11-19 05:31:42,016 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 50 treesize of output 38 [2021-11-19 05:31:42,852 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 05:31:42,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 57 [2021-11-19 05:31:42,879 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 05:31:42,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 56 [2021-11-19 05:31:43,643 INFO L354 Elim1Store]: treesize reduction 39, result has 46.6 percent of original size [2021-11-19 05:31:43,644 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 39 treesize of output 52 [2021-11-19 05:31:43,826 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 25 proven. 20 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-19 05:31:43,826 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 05:31:43,826 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [959458171] [2021-11-19 05:31:43,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [959458171] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:31:43,827 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 05:31:43,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 24 [2021-11-19 05:31:43,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096376578] [2021-11-19 05:31:43,827 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 05:31:43,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-19 05:31:43,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 05:31:43,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-19 05:31:43,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-11-19 05:31:43,829 INFO L87 Difference]: Start difference. First operand 231 states and 329 transitions. Second operand has 24 states, 21 states have (on average 5.095238095238095) internal successors, (107), 24 states have internal predecessors, (107), 8 states have call successors, (28), 3 states have call predecessors, (28), 6 states have return successors, (27), 6 states have call predecessors, (27), 8 states have call successors, (27) [2021-11-19 05:31:45,926 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:31:47,934 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:31:49,943 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:31:51,958 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:31:53,969 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:32:09,744 WARN L227 SmtUtils]: Spent 6.57s on a formula simplification. DAG size of input: 48 DAG size of output: 35 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 05:32:16,869 WARN L227 SmtUtils]: Spent 6.66s on a formula simplification. DAG size of input: 53 DAG size of output: 40 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 05:32:40,531 WARN L227 SmtUtils]: Spent 23.13s on a formula simplification. DAG size of input: 54 DAG size of output: 29 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 05:32:49,225 WARN L227 SmtUtils]: Spent 6.55s on a formula simplification. DAG size of input: 62 DAG size of output: 49 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 05:32:56,065 WARN L227 SmtUtils]: Spent 6.72s on a formula simplification. DAG size of input: 67 DAG size of output: 54 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 05:33:19,207 WARN L227 SmtUtils]: Spent 23.03s on a formula simplification. DAG size of input: 68 DAG size of output: 43 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 05:33:28,041 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.81s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:33:30,061 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:33:31,529 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:33:33,048 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:33:34,151 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:33:35,573 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:33:38,392 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:33:40,673 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:33:42,688 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:33:44,495 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.81s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:33:52,055 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:33:54,068 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:33:56,086 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:33:59,096 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:34:01,112 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:34:03,130 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:34:05,150 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:34:06,889 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:34:08,908 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:34:10,926 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:34:12,943 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:34:13,947 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:34:15,267 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:34:17,287 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:34:19,300 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:34:23,499 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:34:25,332 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:34:27,124 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:34:52,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:34:52,806 INFO L93 Difference]: Finished difference Result 1003 states and 1651 transitions. [2021-11-19 05:34:52,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-19 05:34:52,807 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 5.095238095238095) internal successors, (107), 24 states have internal predecessors, (107), 8 states have call successors, (28), 3 states have call predecessors, (28), 6 states have return successors, (27), 6 states have call predecessors, (27), 8 states have call successors, (27) Word has length 126 [2021-11-19 05:34:52,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:34:52,817 INFO L225 Difference]: With dead ends: 1003 [2021-11-19 05:34:52,817 INFO L226 Difference]: Without dead ends: 899 [2021-11-19 05:34:52,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 228 SyntacticMatches, 6 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 655 ImplicationChecksByTransitivity, 82.3s TimeCoverageRelationStatistics Valid=420, Invalid=2886, Unknown=0, NotChecked=0, Total=3306 [2021-11-19 05:34:52,821 INFO L933 BasicCegarLoop]: 650 mSDtfsCounter, 466 mSDsluCounter, 7270 mSDsCounter, 0 mSdLazyCounter, 4495 mSolverCounterSat, 628 mSolverCounterUnsat, 21 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 105.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 562 SdHoareTripleChecker+Valid, 7920 SdHoareTripleChecker+Invalid, 5906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 628 IncrementalHoareTripleChecker+Valid, 4495 IncrementalHoareTripleChecker+Invalid, 21 IncrementalHoareTripleChecker+Unknown, 762 IncrementalHoareTripleChecker+Unchecked, 109.6s IncrementalHoareTripleChecker+Time [2021-11-19 05:34:52,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [562 Valid, 7920 Invalid, 5906 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [628 Valid, 4495 Invalid, 21 Unknown, 762 Unchecked, 109.6s Time] [2021-11-19 05:34:52,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 899 states. [2021-11-19 05:34:52,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 899 to 272. [2021-11-19 05:34:52,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 175 states have (on average 1.16) internal successors, (203), 179 states have internal predecessors, (203), 79 states have call successors, (79), 14 states have call predecessors, (79), 17 states have return successors, (119), 78 states have call predecessors, (119), 78 states have call successors, (119) [2021-11-19 05:34:52,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 401 transitions. [2021-11-19 05:34:52,874 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 401 transitions. Word has length 126 [2021-11-19 05:34:52,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:34:52,875 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 401 transitions. [2021-11-19 05:34:52,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 5.095238095238095) internal successors, (107), 24 states have internal predecessors, (107), 8 states have call successors, (28), 3 states have call predecessors, (28), 6 states have return successors, (27), 6 states have call predecessors, (27), 8 states have call successors, (27) [2021-11-19 05:34:52,876 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 401 transitions. [2021-11-19 05:34:52,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-19 05:34:52,878 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:34:52,878 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:34:52,908 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-19 05:34:53,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 05:34:53,098 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:34:53,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:34:53,099 INFO L85 PathProgramCache]: Analyzing trace with hash -190072023, now seen corresponding path program 1 times [2021-11-19 05:34:53,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 05:34:53,100 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [715914133] [2021-11-19 05:34:53,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:34:53,100 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 05:34:53,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 05:34:53,103 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 05:34:53,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-19 05:34:53,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:53,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 1444 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 05:34:53,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:34:54,224 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-11-19 05:34:54,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:34:54,630 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-11-19 05:34:54,630 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 05:34:54,630 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [715914133] [2021-11-19 05:34:54,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [715914133] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 05:34:54,631 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:34:54,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 12 [2021-11-19 05:34:54,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653707709] [2021-11-19 05:34:54,631 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 05:34:54,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 05:34:54,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 05:34:54,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 05:34:54,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-11-19 05:34:54,633 INFO L87 Difference]: Start difference. First operand 272 states and 401 transitions. Second operand has 12 states, 10 states have (on average 5.9) internal successors, (59), 8 states have internal predecessors, (59), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 1 states have call successors, (16) [2021-11-19 05:34:54,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:34:54,873 INFO L93 Difference]: Finished difference Result 284 states and 413 transitions. [2021-11-19 05:34:54,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 05:34:54,873 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 5.9) internal successors, (59), 8 states have internal predecessors, (59), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 1 states have call successors, (16) Word has length 126 [2021-11-19 05:34:54,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:34:54,876 INFO L225 Difference]: With dead ends: 284 [2021-11-19 05:34:54,877 INFO L226 Difference]: Without dead ends: 282 [2021-11-19 05:34:54,877 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-11-19 05:34:54,878 INFO L933 BasicCegarLoop]: 235 mSDtfsCounter, 23 mSDsluCounter, 1791 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 2026 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 05:34:54,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 2026 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 05:34:54,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-11-19 05:34:54,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 277. [2021-11-19 05:34:54,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 178 states have (on average 1.1573033707865168) internal successors, (206), 182 states have internal predecessors, (206), 80 states have call successors, (80), 15 states have call predecessors, (80), 18 states have return successors, (120), 79 states have call predecessors, (120), 79 states have call successors, (120) [2021-11-19 05:34:54,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 406 transitions. [2021-11-19 05:34:54,905 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 406 transitions. Word has length 126 [2021-11-19 05:34:54,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:34:54,905 INFO L470 AbstractCegarLoop]: Abstraction has 277 states and 406 transitions. [2021-11-19 05:34:54,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 5.9) internal successors, (59), 8 states have internal predecessors, (59), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 1 states have call successors, (16) [2021-11-19 05:34:54,905 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 406 transitions. [2021-11-19 05:34:54,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-19 05:34:54,907 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:34:54,907 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:34:54,941 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-19 05:34:55,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 05:34:55,130 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:34:55,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:34:55,131 INFO L85 PathProgramCache]: Analyzing trace with hash 583599087, now seen corresponding path program 1 times [2021-11-19 05:34:55,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 05:34:55,132 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [376335580] [2021-11-19 05:34:55,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:34:55,132 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 05:34:55,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 05:34:55,133 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 05:34:55,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc98188-ca23-47b5-818a-abf3f9515b1c/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-19 05:35:02,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:35:02,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 1450 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-19 05:35:02,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:35:02,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-11-19 05:35:03,207 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 18 treesize of output 14 [2021-11-19 05:35:05,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:35:05,661 INFO L354 Elim1Store]: treesize reduction 188, result has 9.2 percent of original size [2021-11-19 05:35:05,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 229 treesize of output 203 [2021-11-19 05:35:05,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:35:05,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:35:05,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:35:05,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:35:05,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:35:05,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:35:06,504 INFO L354 Elim1Store]: treesize reduction 625, result has 8.4 percent of original size [2021-11-19 05:35:06,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 12 case distinctions, treesize of input 203 treesize of output 172 [2021-11-19 05:35:06,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:35:06,860 INFO L354 Elim1Store]: treesize reduction 384, result has 6.8 percent of original size [2021-11-19 05:35:06,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 5 case distinctions, treesize of input 192 treesize of output 166 [2021-11-19 05:35:06,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:35:06,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:35:06,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:35:06,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:35:06,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:35:06,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:35:07,517 INFO L354 Elim1Store]: treesize reduction 975, result has 7.1 percent of original size [2021-11-19 05:35:07,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 23 case distinctions, treesize of input 166 treesize of output 141 [2021-11-19 05:35:07,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:35:07,678 INFO L354 Elim1Store]: treesize reduction 126, result has 18.2 percent of original size [2021-11-19 05:35:07,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 155 treesize of output 154 [2021-11-19 05:35:08,192 INFO L354 Elim1Store]: treesize reduction 282, result has 0.4 percent of original size [2021-11-19 05:35:08,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 153 treesize of output 83 [2021-11-19 05:35:08,206 INFO L354 Elim1Store]: treesize reduction 68, result has 1.4 percent of original size [2021-11-19 05:35:08,206 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 6 case distinctions, treesize of input 59 treesize of output 29 [2021-11-19 05:35:08,601 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-19 05:35:08,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:35:42,118 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-19 05:35:42,141 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 5995769888818 treesize of output 4608495452200