./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_byte_cursor_trim_pred_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0adc387-e7df-4069-9c09-29814be0ed52/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0adc387-e7df-4069-9c09-29814be0ed52/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0adc387-e7df-4069-9c09-29814be0ed52/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0adc387-e7df-4069-9c09-29814be0ed52/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_byte_cursor_trim_pred_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0adc387-e7df-4069-9c09-29814be0ed52/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0adc387-e7df-4069-9c09-29814be0ed52/bin/uautomizer-DrprNOufMa --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 2fd96106837ff3ee9325c248fea6969b94a5a1f2cee078fd159398f70369aafc --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 23:07:23,977 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 23:07:23,978 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 23:07:24,009 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 23:07:24,010 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 23:07:24,011 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 23:07:24,013 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 23:07:24,015 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 23:07:24,017 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 23:07:24,018 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 23:07:24,019 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 23:07:24,021 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 23:07:24,021 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 23:07:24,022 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 23:07:24,024 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 23:07:24,025 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 23:07:24,026 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 23:07:24,027 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 23:07:24,029 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 23:07:24,032 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 23:07:24,034 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 23:07:24,035 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 23:07:24,037 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 23:07:24,038 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 23:07:24,041 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 23:07:24,042 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 23:07:24,042 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 23:07:24,043 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 23:07:24,043 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 23:07:24,045 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 23:07:24,045 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 23:07:24,046 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 23:07:24,047 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 23:07:24,047 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 23:07:24,049 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 23:07:24,049 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 23:07:24,049 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 23:07:24,050 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 23:07:24,050 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 23:07:24,051 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 23:07:24,051 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 23:07:24,052 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0adc387-e7df-4069-9c09-29814be0ed52/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-06 23:07:24,076 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 23:07:24,076 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 23:07:24,077 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 23:07:24,077 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 23:07:24,077 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 23:07:24,078 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 23:07:24,078 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 23:07:24,079 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 23:07:24,079 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 23:07:24,079 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 23:07:24,079 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 23:07:24,079 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 23:07:24,080 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 23:07:24,080 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 23:07:24,080 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 23:07:24,080 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 23:07:24,080 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 23:07:24,081 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 23:07:24,081 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 23:07:24,081 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 23:07:24,081 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 23:07:24,081 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 23:07:24,082 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 23:07:24,082 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 23:07:24,082 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 23:07:24,082 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 23:07:24,082 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 23:07:24,083 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 23:07:24,083 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 23:07:24,083 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 23:07:24,083 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 23:07:24,083 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_a0adc387-e7df-4069-9c09-29814be0ed52/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0adc387-e7df-4069-9c09-29814be0ed52/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2fd96106837ff3ee9325c248fea6969b94a5a1f2cee078fd159398f70369aafc [2021-12-06 23:07:24,252 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 23:07:24,272 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 23:07:24,274 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 23:07:24,275 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 23:07:24,276 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 23:07:24,277 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0adc387-e7df-4069-9c09-29814be0ed52/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/aws-c-common/aws_byte_cursor_trim_pred_harness.i [2021-12-06 23:07:24,320 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0adc387-e7df-4069-9c09-29814be0ed52/bin/uautomizer-DrprNOufMa/data/8ea861b06/bc24421f50ba455eb0a9db94e136df0d/FLAGd72b5a84b [2021-12-06 23:07:24,926 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 23:07:24,926 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0adc387-e7df-4069-9c09-29814be0ed52/sv-benchmarks/c/aws-c-common/aws_byte_cursor_trim_pred_harness.i [2021-12-06 23:07:24,952 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0adc387-e7df-4069-9c09-29814be0ed52/bin/uautomizer-DrprNOufMa/data/8ea861b06/bc24421f50ba455eb0a9db94e136df0d/FLAGd72b5a84b [2021-12-06 23:07:25,326 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0adc387-e7df-4069-9c09-29814be0ed52/bin/uautomizer-DrprNOufMa/data/8ea861b06/bc24421f50ba455eb0a9db94e136df0d [2021-12-06 23:07:25,331 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 23:07:25,333 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 23:07:25,335 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 23:07:25,335 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 23:07:25,339 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 23:07:25,340 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 11:07:25" (1/1) ... [2021-12-06 23:07:25,341 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@571807b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:07:25, skipping insertion in model container [2021-12-06 23:07:25,341 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 11:07:25" (1/1) ... [2021-12-06 23:07:25,347 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 23:07:25,410 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 23:07:25,609 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_a0adc387-e7df-4069-9c09-29814be0ed52/sv-benchmarks/c/aws-c-common/aws_byte_cursor_trim_pred_harness.i[4499,4512] [2021-12-06 23:07:25,614 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_a0adc387-e7df-4069-9c09-29814be0ed52/sv-benchmarks/c/aws-c-common/aws_byte_cursor_trim_pred_harness.i[4559,4572] [2021-12-06 23:07:26,213 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 23:07:26,214 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 23:07:26,215 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 23:07:26,215 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 23:07:26,216 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 23:07:26,226 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 23:07:26,227 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 23:07:26,228 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 23:07:26,229 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 23:07:26,522 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-06 23:07:26,523 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-06 23:07:26,523 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-06 23:07:26,524 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-06 23:07:26,525 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-06 23:07:26,526 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-06 23:07:26,526 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-06 23:07:26,526 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-06 23:07:26,527 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-06 23:07:26,527 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-06 23:07:26,652 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-06 23:07:26,715 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 23:07:26,715 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 23:07:26,777 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 23:07:26,833 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 23:07:26,847 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_a0adc387-e7df-4069-9c09-29814be0ed52/sv-benchmarks/c/aws-c-common/aws_byte_cursor_trim_pred_harness.i[4499,4512] [2021-12-06 23:07:26,848 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_a0adc387-e7df-4069-9c09-29814be0ed52/sv-benchmarks/c/aws-c-common/aws_byte_cursor_trim_pred_harness.i[4559,4572] [2021-12-06 23:07:26,883 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 23:07:26,884 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 23:07:26,884 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 23:07:26,885 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 23:07:26,885 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 23:07:26,892 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 23:07:26,893 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 23:07:26,894 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 23:07:26,894 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 23:07:26,926 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-06 23:07:26,927 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-06 23:07:26,927 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-06 23:07:26,928 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-06 23:07:26,929 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-06 23:07:26,929 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-06 23:07:26,930 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-06 23:07:26,930 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-06 23:07:26,931 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-06 23:07:26,931 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-06 23:07:26,950 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-06 23:07:27,004 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 23:07:27,004 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 23:07:27,034 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 23:07:27,225 INFO L208 MainTranslator]: Completed translation [2021-12-06 23:07:27,226 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:07:27 WrapperNode [2021-12-06 23:07:27,226 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 23:07:27,226 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 23:07:27,226 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 23:07:27,227 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 23:07:27,233 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:07:27" (1/1) ... [2021-12-06 23:07:27,303 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:07:27" (1/1) ... [2021-12-06 23:07:27,359 INFO L137 Inliner]: procedures = 690, calls = 2620, calls flagged for inlining = 62, calls inlined = 10, statements flattened = 894 [2021-12-06 23:07:27,359 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 23:07:27,360 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 23:07:27,360 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 23:07:27,360 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 23:07:27,368 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:07:27" (1/1) ... [2021-12-06 23:07:27,369 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:07:27" (1/1) ... [2021-12-06 23:07:27,378 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:07:27" (1/1) ... [2021-12-06 23:07:27,378 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:07:27" (1/1) ... [2021-12-06 23:07:27,414 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:07:27" (1/1) ... [2021-12-06 23:07:27,419 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:07:27" (1/1) ... [2021-12-06 23:07:27,428 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:07:27" (1/1) ... [2021-12-06 23:07:27,442 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 23:07:27,443 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 23:07:27,443 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 23:07:27,443 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 23:07:27,444 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:07:27" (1/1) ... [2021-12-06 23:07:27,452 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 23:07:27,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0adc387-e7df-4069-9c09-29814be0ed52/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:07:27,474 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0adc387-e7df-4069-9c09-29814be0ed52/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 23:07:27,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0adc387-e7df-4069-9c09-29814be0ed52/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 23:07:27,512 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_cursor_is_valid [2021-12-06 23:07:27,513 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_cursor_is_valid [2021-12-06 23:07:27,513 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-06 23:07:27,513 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-12-06 23:07:27,513 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-12-06 23:07:27,513 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-06 23:07:27,513 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-06 23:07:27,513 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-06 23:07:27,513 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_cursor_left_trim_pred [2021-12-06 23:07:27,514 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_cursor_left_trim_pred [2021-12-06 23:07:27,514 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-06 23:07:27,514 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 23:07:27,514 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-06 23:07:27,514 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 23:07:27,514 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 23:07:27,514 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-12-06 23:07:27,514 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-12-06 23:07:27,514 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2021-12-06 23:07:27,515 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2021-12-06 23:07:27,515 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-06 23:07:27,515 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-06 23:07:27,515 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-06 23:07:27,515 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-06 23:07:27,515 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-06 23:07:27,515 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~~uint8_t~0~TO~int [2021-12-06 23:07:27,515 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~~uint8_t~0~TO~int [2021-12-06 23:07:27,515 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-06 23:07:27,516 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 23:07:27,702 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 23:07:27,704 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 23:07:28,593 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 23:07:28,599 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 23:07:28,599 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-06 23:07:28,601 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 11:07:28 BoogieIcfgContainer [2021-12-06 23:07:28,601 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 23:07:28,602 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 23:07:28,602 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 23:07:28,604 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 23:07:28,605 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 11:07:25" (1/3) ... [2021-12-06 23:07:28,605 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4686077d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 11:07:28, skipping insertion in model container [2021-12-06 23:07:28,605 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:07:27" (2/3) ... [2021-12-06 23:07:28,605 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4686077d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 11:07:28, skipping insertion in model container [2021-12-06 23:07:28,606 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 11:07:28" (3/3) ... [2021-12-06 23:07:28,606 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_byte_cursor_trim_pred_harness.i [2021-12-06 23:07:28,610 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 23:07:28,611 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 23:07:28,646 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 23:07:28,651 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 [2021-12-06 23:07:28,651 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 23:07:28,667 INFO L276 IsEmpty]: Start isEmpty. Operand has 124 states, 77 states have (on average 1.2337662337662338) internal successors, (95), 78 states have internal predecessors, (95), 37 states have call successors, (37), 8 states have call predecessors, (37), 8 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2021-12-06 23:07:28,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-06 23:07:28,674 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:07:28,675 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:07:28,675 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:07:28,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:07:28,679 INFO L85 PathProgramCache]: Analyzing trace with hash -484495775, now seen corresponding path program 1 times [2021-12-06 23:07:28,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:07:28,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962975368] [2021-12-06 23:07:28,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:07:28,687 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:07:28,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:29,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 23:07:29,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:29,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 23:07:29,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:29,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 23:07:29,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:29,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-06 23:07:29,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:29,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-06 23:07:29,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:29,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-06 23:07:29,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:29,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-06 23:07:29,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:29,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-06 23:07:29,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:29,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-06 23:07:29,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:29,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-06 23:07:29,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:29,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 23:07:29,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:29,211 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-12-06 23:07:29,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:07:29,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962975368] [2021-12-06 23:07:29,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962975368] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:07:29,213 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:07:29,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 23:07:29,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535564059] [2021-12-06 23:07:29,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:07:29,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 23:07:29,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:07:29,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 23:07:29,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 23:07:29,243 INFO L87 Difference]: Start difference. First operand has 124 states, 77 states have (on average 1.2337662337662338) internal successors, (95), 78 states have internal predecessors, (95), 37 states have call successors, (37), 8 states have call predecessors, (37), 8 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) Second operand has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-06 23:07:29,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:07:29,282 INFO L93 Difference]: Finished difference Result 244 states and 355 transitions. [2021-12-06 23:07:29,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 23:07:29,284 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) Word has length 79 [2021-12-06 23:07:29,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:07:29,291 INFO L225 Difference]: With dead ends: 244 [2021-12-06 23:07:29,292 INFO L226 Difference]: Without dead ends: 115 [2021-12-06 23:07:29,295 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 23:07:29,298 INFO L933 BasicCegarLoop]: 165 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, 165 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 [2021-12-06 23:07:29,299 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:07:29,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-12-06 23:07:29,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2021-12-06 23:07:29,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 70 states have (on average 1.1714285714285715) internal successors, (82), 71 states have internal predecessors, (82), 37 states have call successors, (37), 8 states have call predecessors, (37), 7 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2021-12-06 23:07:29,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 154 transitions. [2021-12-06 23:07:29,336 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 154 transitions. Word has length 79 [2021-12-06 23:07:29,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:07:29,336 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 154 transitions. [2021-12-06 23:07:29,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-06 23:07:29,337 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 154 transitions. [2021-12-06 23:07:29,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-06 23:07:29,340 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:07:29,340 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:07:29,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 23:07:29,341 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:07:29,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:07:29,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1850978430, now seen corresponding path program 1 times [2021-12-06 23:07:29,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:07:29,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823413131] [2021-12-06 23:07:29,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:07:29,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:07:29,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:29,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 23:07:29,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:29,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 23:07:29,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:29,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 23:07:29,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:29,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-06 23:07:29,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:29,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-06 23:07:29,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:29,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-06 23:07:29,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:29,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-06 23:07:29,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:29,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-06 23:07:29,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:29,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-06 23:07:29,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:29,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-06 23:07:29,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:29,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-06 23:07:29,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:29,620 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-12-06 23:07:29,620 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:07:29,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823413131] [2021-12-06 23:07:29,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823413131] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:07:29,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413224002] [2021-12-06 23:07:29,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:07:29,621 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:07:29,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0adc387-e7df-4069-9c09-29814be0ed52/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:07:29,622 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0adc387-e7df-4069-9c09-29814be0ed52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:07:29,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0adc387-e7df-4069-9c09-29814be0ed52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 23:07:29,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:29,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 2552 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 23:07:29,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:07:30,131 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-12-06 23:07:30,131 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 23:07:30,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413224002] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:07:30,132 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 23:07:30,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 9 [2021-12-06 23:07:30,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769066075] [2021-12-06 23:07:30,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:07:30,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 23:07:30,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:07:30,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 23:07:30,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-06 23:07:30,135 INFO L87 Difference]: Start difference. First operand 115 states and 154 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-06 23:07:30,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:07:30,300 INFO L93 Difference]: Finished difference Result 213 states and 298 transitions. [2021-12-06 23:07:30,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 23:07:30,300 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 81 [2021-12-06 23:07:30,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:07:30,303 INFO L225 Difference]: With dead ends: 213 [2021-12-06 23:07:30,303 INFO L226 Difference]: Without dead ends: 118 [2021-12-06 23:07:30,304 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-12-06 23:07:30,305 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 171 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:07:30,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 296 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 23:07:30,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-12-06 23:07:30,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2021-12-06 23:07:30,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 72 states have (on average 1.1666666666666667) internal successors, (84), 74 states have internal predecessors, (84), 37 states have call successors, (37), 8 states have call predecessors, (37), 8 states have return successors, (45), 35 states have call predecessors, (45), 35 states have call successors, (45) [2021-12-06 23:07:30,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 166 transitions. [2021-12-06 23:07:30,321 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 166 transitions. Word has length 81 [2021-12-06 23:07:30,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:07:30,321 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 166 transitions. [2021-12-06 23:07:30,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-06 23:07:30,322 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 166 transitions. [2021-12-06 23:07:30,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-06 23:07:30,323 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:07:30,323 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:07:30,346 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0adc387-e7df-4069-9c09-29814be0ed52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 23:07:30,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0adc387-e7df-4069-9c09-29814be0ed52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-12-06 23:07:30,525 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:07:30,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:07:30,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1473940729, now seen corresponding path program 1 times [2021-12-06 23:07:30,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:07:30,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385357863] [2021-12-06 23:07:30,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:07:30,529 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:07:30,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:30,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 23:07:30,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:30,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 23:07:30,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:30,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 23:07:30,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:30,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 23:07:30,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:30,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 23:07:30,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:30,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-06 23:07:30,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:30,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-06 23:07:30,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:30,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-06 23:07:30,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:30,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-06 23:07:31,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:31,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-06 23:07:31,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:31,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-06 23:07:31,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:31,029 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-06 23:07:31,029 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:07:31,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385357863] [2021-12-06 23:07:31,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385357863] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:07:31,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261871787] [2021-12-06 23:07:31,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:07:31,030 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:07:31,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0adc387-e7df-4069-9c09-29814be0ed52/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:07:31,031 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0adc387-e7df-4069-9c09-29814be0ed52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:07:31,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0adc387-e7df-4069-9c09-29814be0ed52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 23:07:31,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:31,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 2557 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 23:07:31,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:07:31,504 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-06 23:07:31,504 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 23:07:31,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261871787] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:07:31,504 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 23:07:31,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 14 [2021-12-06 23:07:31,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745399129] [2021-12-06 23:07:31,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:07:31,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 23:07:31,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:07:31,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 23:07:31,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-12-06 23:07:31,506 INFO L87 Difference]: Start difference. First operand 118 states and 166 transitions. Second operand has 7 states, 6 states have (on average 7.166666666666667) internal successors, (43), 7 states have internal predecessors, (43), 3 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-06 23:07:31,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:07:31,668 INFO L93 Difference]: Finished difference Result 208 states and 295 transitions. [2021-12-06 23:07:31,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 23:07:31,668 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 7.166666666666667) internal successors, (43), 7 states have internal predecessors, (43), 3 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) Word has length 83 [2021-12-06 23:07:31,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:07:31,671 INFO L225 Difference]: With dead ends: 208 [2021-12-06 23:07:31,671 INFO L226 Difference]: Without dead ends: 118 [2021-12-06 23:07:31,672 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-12-06 23:07:31,673 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 189 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:07:31,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 481 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 23:07:31,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-12-06 23:07:31,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2021-12-06 23:07:31,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 72 states have (on average 1.1666666666666667) internal successors, (84), 74 states have internal predecessors, (84), 37 states have call successors, (37), 8 states have call predecessors, (37), 8 states have return successors, (43), 35 states have call predecessors, (43), 35 states have call successors, (43) [2021-12-06 23:07:31,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 164 transitions. [2021-12-06 23:07:31,686 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 164 transitions. Word has length 83 [2021-12-06 23:07:31,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:07:31,687 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 164 transitions. [2021-12-06 23:07:31,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 7.166666666666667) internal successors, (43), 7 states have internal predecessors, (43), 3 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-06 23:07:31,687 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 164 transitions. [2021-12-06 23:07:31,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-12-06 23:07:31,688 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:07:31,689 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 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] [2021-12-06 23:07:31,712 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0adc387-e7df-4069-9c09-29814be0ed52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 23:07:31,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0adc387-e7df-4069-9c09-29814be0ed52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:07:31,891 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:07:31,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:07:31,893 INFO L85 PathProgramCache]: Analyzing trace with hash -346545804, now seen corresponding path program 2 times [2021-12-06 23:07:31,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:07:31,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272894482] [2021-12-06 23:07:31,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:07:31,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:07:32,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:32,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 23:07:32,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:32,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 23:07:32,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:32,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 23:07:32,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:32,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 23:07:32,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:32,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 23:07:32,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:32,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-06 23:07:32,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:32,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-06 23:07:32,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:32,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-06 23:07:32,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:32,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-06 23:07:32,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:32,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-06 23:07:32,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:32,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-06 23:07:32,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:32,303 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-06 23:07:32,304 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:07:32,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272894482] [2021-12-06 23:07:32,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272894482] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:07:32,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560485729] [2021-12-06 23:07:32,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 23:07:32,304 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:07:32,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0adc387-e7df-4069-9c09-29814be0ed52/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:07:32,305 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0adc387-e7df-4069-9c09-29814be0ed52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:07:32,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0adc387-e7df-4069-9c09-29814be0ed52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 23:07:32,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 23:07:32,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:07:32,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 2562 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-06 23:07:32,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:07:32,772 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-12-06 23:07:32,773 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 23:07:32,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560485729] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:07:32,773 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 23:07:32,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11] total 18 [2021-12-06 23:07:32,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172328532] [2021-12-06 23:07:32,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:07:32,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 23:07:32,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:07:32,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 23:07:32,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-12-06 23:07:32,774 INFO L87 Difference]: Start difference. First operand 118 states and 164 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 4 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-06 23:07:33,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:07:33,002 INFO L93 Difference]: Finished difference Result 201 states and 281 transitions. [2021-12-06 23:07:33,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 23:07:33,002 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 4 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) Word has length 85 [2021-12-06 23:07:33,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:07:33,004 INFO L225 Difference]: With dead ends: 201 [2021-12-06 23:07:33,005 INFO L226 Difference]: Without dead ends: 118 [2021-12-06 23:07:33,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-12-06 23:07:33,007 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 196 mSDsluCounter, 536 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 642 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 23:07:33,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 642 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 23:07:33,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-12-06 23:07:33,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2021-12-06 23:07:33,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 72 states have (on average 1.1666666666666667) internal successors, (84), 74 states have internal predecessors, (84), 37 states have call successors, (37), 8 states have call predecessors, (37), 8 states have return successors, (41), 35 states have call predecessors, (41), 35 states have call successors, (41) [2021-12-06 23:07:33,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 162 transitions. [2021-12-06 23:07:33,019 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 162 transitions. Word has length 85 [2021-12-06 23:07:33,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:07:33,020 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 162 transitions. [2021-12-06 23:07:33,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 4 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-06 23:07:33,020 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 162 transitions. [2021-12-06 23:07:33,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-12-06 23:07:33,021 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:07:33,021 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:07:33,050 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0adc387-e7df-4069-9c09-29814be0ed52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 23:07:33,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0adc387-e7df-4069-9c09-29814be0ed52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:07:33,222 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:07:33,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:07:33,223 INFO L85 PathProgramCache]: Analyzing trace with hash 625417492, now seen corresponding path program 1 times [2021-12-06 23:07:33,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:07:33,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408646541] [2021-12-06 23:07:33,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:07:33,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:07:33,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:33,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 23:07:33,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:33,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 23:07:33,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:33,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 23:07:33,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:33,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 23:07:33,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:33,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 23:07:33,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:33,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-06 23:07:33,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:33,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-06 23:07:33,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:33,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-06 23:07:33,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:33,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-06 23:07:33,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:33,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-06 23:07:33,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:33,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-06 23:07:33,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:33,482 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-12-06 23:07:33,482 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:07:33,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408646541] [2021-12-06 23:07:33,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408646541] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:07:33,482 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:07:33,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-06 23:07:33,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267032540] [2021-12-06 23:07:33,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:07:33,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 23:07:33,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:07:33,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 23:07:33,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-06 23:07:33,484 INFO L87 Difference]: Start difference. First operand 118 states and 162 transitions. Second operand has 8 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2021-12-06 23:07:33,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:07:33,534 INFO L93 Difference]: Finished difference Result 130 states and 185 transitions. [2021-12-06 23:07:33,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 23:07:33,535 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) Word has length 89 [2021-12-06 23:07:33,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:07:33,537 INFO L225 Difference]: With dead ends: 130 [2021-12-06 23:07:33,537 INFO L226 Difference]: Without dead ends: 128 [2021-12-06 23:07:33,538 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-06 23:07:33,538 INFO L933 BasicCegarLoop]: 158 mSDtfsCounter, 16 mSDsluCounter, 916 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 1074 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:07:33,539 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 1074 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:07:33,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-12-06 23:07:33,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2021-12-06 23:07:33,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 78 states have (on average 1.1538461538461537) internal successors, (90), 81 states have internal predecessors, (90), 38 states have call successors, (38), 9 states have call predecessors, (38), 10 states have return successors, (54), 36 states have call predecessors, (54), 36 states have call successors, (54) [2021-12-06 23:07:33,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 182 transitions. [2021-12-06 23:07:33,555 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 182 transitions. Word has length 89 [2021-12-06 23:07:33,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:07:33,556 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 182 transitions. [2021-12-06 23:07:33,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2021-12-06 23:07:33,556 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 182 transitions. [2021-12-06 23:07:33,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-06 23:07:33,558 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:07:33,558 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:07:33,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-06 23:07:33,558 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:07:33,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:07:33,559 INFO L85 PathProgramCache]: Analyzing trace with hash 852132828, now seen corresponding path program 1 times [2021-12-06 23:07:33,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:07:33,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586246357] [2021-12-06 23:07:33,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:07:33,559 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:07:33,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:33,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 23:07:33,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:33,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 23:07:33,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:33,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 23:07:33,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:33,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 23:07:33,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:33,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 23:07:33,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:33,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-06 23:07:33,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:33,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-06 23:07:33,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:33,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-06 23:07:33,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:33,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-06 23:07:33,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:33,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-06 23:07:33,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:33,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-06 23:07:33,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:33,914 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-06 23:07:33,914 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:07:33,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586246357] [2021-12-06 23:07:33,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586246357] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:07:33,915 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:07:33,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-06 23:07:33,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244695725] [2021-12-06 23:07:33,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:07:33,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 23:07:33,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:07:33,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 23:07:33,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-12-06 23:07:33,916 INFO L87 Difference]: Start difference. First operand 127 states and 182 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-06 23:07:34,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:07:34,255 INFO L93 Difference]: Finished difference Result 225 states and 333 transitions. [2021-12-06 23:07:34,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 23:07:34,256 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 93 [2021-12-06 23:07:34,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:07:34,258 INFO L225 Difference]: With dead ends: 225 [2021-12-06 23:07:34,258 INFO L226 Difference]: Without dead ends: 148 [2021-12-06 23:07:34,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-12-06 23:07:34,260 INFO L933 BasicCegarLoop]: 145 mSDtfsCounter, 36 mSDsluCounter, 515 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 660 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 23:07:34,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 660 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 23:07:34,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-12-06 23:07:34,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 134. [2021-12-06 23:07:34,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 82 states have (on average 1.170731707317073) internal successors, (96), 86 states have internal predecessors, (96), 41 states have call successors, (41), 9 states have call predecessors, (41), 10 states have return successors, (58), 38 states have call predecessors, (58), 39 states have call successors, (58) [2021-12-06 23:07:34,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 195 transitions. [2021-12-06 23:07:34,280 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 195 transitions. Word has length 93 [2021-12-06 23:07:34,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:07:34,280 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 195 transitions. [2021-12-06 23:07:34,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-06 23:07:34,281 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 195 transitions. [2021-12-06 23:07:34,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-06 23:07:34,282 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:07:34,282 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 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] [2021-12-06 23:07:34,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-06 23:07:34,283 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:07:34,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:07:34,283 INFO L85 PathProgramCache]: Analyzing trace with hash -1211514462, now seen corresponding path program 1 times [2021-12-06 23:07:34,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:07:34,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466589974] [2021-12-06 23:07:34,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:07:34,283 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:07:34,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:34,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 23:07:34,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:34,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 23:07:34,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:34,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 23:07:34,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:34,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 23:07:34,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:34,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 23:07:34,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:34,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-06 23:07:34,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:34,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-06 23:07:34,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:34,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-06 23:07:34,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:34,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-06 23:07:34,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:34,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-06 23:07:34,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:34,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-06 23:07:34,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:34,464 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-12-06 23:07:34,464 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:07:34,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466589974] [2021-12-06 23:07:34,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466589974] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:07:34,464 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:07:34,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 23:07:34,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362881540] [2021-12-06 23:07:34,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:07:34,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 23:07:34,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:07:34,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 23:07:34,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:07:34,466 INFO L87 Difference]: Start difference. First operand 134 states and 195 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-06 23:07:34,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:07:34,481 INFO L93 Difference]: Finished difference Result 223 states and 324 transitions. [2021-12-06 23:07:34,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 23:07:34,482 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 96 [2021-12-06 23:07:34,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:07:34,484 INFO L225 Difference]: With dead ends: 223 [2021-12-06 23:07:34,484 INFO L226 Difference]: Without dead ends: 135 [2021-12-06 23:07:34,485 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:07:34,485 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 0 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:07:34,485 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 301 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:07:34,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-12-06 23:07:34,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2021-12-06 23:07:34,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 83 states have (on average 1.1566265060240963) internal successors, (96), 87 states have internal predecessors, (96), 41 states have call successors, (41), 9 states have call predecessors, (41), 10 states have return successors, (58), 38 states have call predecessors, (58), 39 states have call successors, (58) [2021-12-06 23:07:34,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 195 transitions. [2021-12-06 23:07:34,497 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 195 transitions. Word has length 96 [2021-12-06 23:07:34,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:07:34,497 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 195 transitions. [2021-12-06 23:07:34,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-06 23:07:34,497 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 195 transitions. [2021-12-06 23:07:34,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-12-06 23:07:34,498 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:07:34,499 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:07:34,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-06 23:07:34,499 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:07:34,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:07:34,499 INFO L85 PathProgramCache]: Analyzing trace with hash -247569564, now seen corresponding path program 1 times [2021-12-06 23:07:34,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:07:34,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389494951] [2021-12-06 23:07:34,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:07:34,500 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:07:34,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:34,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 23:07:34,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:34,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 23:07:34,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:34,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 23:07:34,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:34,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 23:07:34,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:34,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 23:07:34,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:34,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-06 23:07:34,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:34,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-06 23:07:34,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:34,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-06 23:07:34,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:34,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-06 23:07:34,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:34,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-06 23:07:34,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:34,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-06 23:07:34,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:34,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-06 23:07:34,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:34,794 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-06 23:07:34,795 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:07:34,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389494951] [2021-12-06 23:07:34,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389494951] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:07:34,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689891463] [2021-12-06 23:07:34,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:07:34,795 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:07:34,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0adc387-e7df-4069-9c09-29814be0ed52/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:07:34,796 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0adc387-e7df-4069-9c09-29814be0ed52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:07:34,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0adc387-e7df-4069-9c09-29814be0ed52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 23:07:35,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:35,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 2612 conjuncts, 54 conjunts are in the unsatisfiable core [2021-12-06 23:07:35,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:07:36,108 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 37 proven. 16 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-12-06 23:07:36,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:07:36,430 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 26 treesize of output 14 [2021-12-06 23:07:36,469 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-12-06 23:07:36,470 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 30 treesize of output 25 [2021-12-06 23:07:36,487 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-12-06 23:07:36,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689891463] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:07:36,488 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:07:36,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 14, 12] total 24 [2021-12-06 23:07:36,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723216079] [2021-12-06 23:07:36,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:07:36,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-06 23:07:36,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:07:36,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-06 23:07:36,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-12-06 23:07:36,490 INFO L87 Difference]: Start difference. First operand 135 states and 195 transitions. Second operand has 24 states, 24 states have (on average 4.583333333333333) internal successors, (110), 22 states have internal predecessors, (110), 9 states have call successors, (35), 5 states have call predecessors, (35), 5 states have return successors, (32), 9 states have call predecessors, (32), 9 states have call successors, (32) [2021-12-06 23:07:38,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:07:38,084 INFO L93 Difference]: Finished difference Result 361 states and 544 transitions. [2021-12-06 23:07:38,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-06 23:07:38,085 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.583333333333333) internal successors, (110), 22 states have internal predecessors, (110), 9 states have call successors, (35), 5 states have call predecessors, (35), 5 states have return successors, (32), 9 states have call predecessors, (32), 9 states have call successors, (32) Word has length 99 [2021-12-06 23:07:38,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:07:38,087 INFO L225 Difference]: With dead ends: 361 [2021-12-06 23:07:38,087 INFO L226 Difference]: Without dead ends: 258 [2021-12-06 23:07:38,088 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 191 SyntacticMatches, 23 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=238, Invalid=1742, Unknown=0, NotChecked=0, Total=1980 [2021-12-06 23:07:38,089 INFO L933 BasicCegarLoop]: 217 mSDtfsCounter, 133 mSDsluCounter, 2234 mSDsCounter, 0 mSdLazyCounter, 1824 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 2451 SdHoareTripleChecker+Invalid, 2065 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1824 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 212 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:07:38,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 2451 Invalid, 2065 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1824 Invalid, 0 Unknown, 212 Unchecked, 1.1s Time] [2021-12-06 23:07:38,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-12-06 23:07:38,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 202. [2021-12-06 23:07:38,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 125 states have (on average 1.136) internal successors, (142), 129 states have internal predecessors, (142), 62 states have call successors, (62), 13 states have call predecessors, (62), 14 states have return successors, (84), 59 states have call predecessors, (84), 60 states have call successors, (84) [2021-12-06 23:07:38,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 288 transitions. [2021-12-06 23:07:38,106 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 288 transitions. Word has length 99 [2021-12-06 23:07:38,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:07:38,106 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 288 transitions. [2021-12-06 23:07:38,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.583333333333333) internal successors, (110), 22 states have internal predecessors, (110), 9 states have call successors, (35), 5 states have call predecessors, (35), 5 states have return successors, (32), 9 states have call predecessors, (32), 9 states have call successors, (32) [2021-12-06 23:07:38,106 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 288 transitions. [2021-12-06 23:07:38,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-12-06 23:07:38,108 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:07:38,108 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:07:38,143 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0adc387-e7df-4069-9c09-29814be0ed52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 23:07:38,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0adc387-e7df-4069-9c09-29814be0ed52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:07:38,308 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:07:38,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:07:38,309 INFO L85 PathProgramCache]: Analyzing trace with hash -1338258892, now seen corresponding path program 1 times [2021-12-06 23:07:38,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:07:38,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278407456] [2021-12-06 23:07:38,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:07:38,309 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:07:38,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:38,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 23:07:38,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:38,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 23:07:38,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:38,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 23:07:38,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:38,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-06 23:07:38,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:38,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-06 23:07:38,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:38,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-06 23:07:38,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:38,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-06 23:07:38,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:38,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-06 23:07:38,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:38,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-06 23:07:38,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:38,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-06 23:07:38,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:38,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-06 23:07:38,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:38,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-06 23:07:38,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:38,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-06 23:07:38,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:38,515 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-12-06 23:07:38,515 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:07:38,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278407456] [2021-12-06 23:07:38,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278407456] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:07:38,515 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:07:38,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 23:07:38,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96775367] [2021-12-06 23:07:38,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:07:38,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 23:07:38,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:07:38,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 23:07:38,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 23:07:38,517 INFO L87 Difference]: Start difference. First operand 202 states and 288 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, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-06 23:07:38,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:07:38,566 INFO L93 Difference]: Finished difference Result 280 states and 398 transitions. [2021-12-06 23:07:38,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 23:07:38,566 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, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) Word has length 105 [2021-12-06 23:07:38,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:07:38,569 INFO L225 Difference]: With dead ends: 280 [2021-12-06 23:07:38,569 INFO L226 Difference]: Without dead ends: 202 [2021-12-06 23:07:38,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 23:07:38,571 INFO L933 BasicCegarLoop]: 143 mSDtfsCounter, 18 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:07:38,571 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 523 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:07:38,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-12-06 23:07:38,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 202. [2021-12-06 23:07:38,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 125 states have (on average 1.136) internal successors, (142), 129 states have internal predecessors, (142), 62 states have call successors, (62), 13 states have call predecessors, (62), 14 states have return successors, (81), 59 states have call predecessors, (81), 60 states have call successors, (81) [2021-12-06 23:07:38,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 285 transitions. [2021-12-06 23:07:38,591 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 285 transitions. Word has length 105 [2021-12-06 23:07:38,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:07:38,592 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 285 transitions. [2021-12-06 23:07:38,592 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, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-06 23:07:38,592 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 285 transitions. [2021-12-06 23:07:38,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-06 23:07:38,594 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:07:38,594 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 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] [2021-12-06 23:07:38,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-06 23:07:38,595 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:07:38,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:07:38,595 INFO L85 PathProgramCache]: Analyzing trace with hash 762751521, now seen corresponding path program 1 times [2021-12-06 23:07:38,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:07:38,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373726371] [2021-12-06 23:07:38,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:07:38,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:07:38,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:38,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 23:07:38,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:38,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 23:07:38,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:38,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 23:07:38,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:38,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 23:07:38,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:38,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 23:07:38,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:38,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-06 23:07:38,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:38,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-06 23:07:38,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:38,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-06 23:07:38,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:38,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-06 23:07:38,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:38,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-06 23:07:38,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:38,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-06 23:07:38,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:38,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-06 23:07:38,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:38,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-06 23:07:38,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:38,804 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-12-06 23:07:38,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:07:38,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373726371] [2021-12-06 23:07:38,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373726371] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:07:38,804 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:07:38,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-06 23:07:38,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648572611] [2021-12-06 23:07:38,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:07:38,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 23:07:38,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:07:38,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 23:07:38,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-06 23:07:38,806 INFO L87 Difference]: Start difference. First operand 202 states and 285 transitions. Second operand has 8 states, 7 states have (on average 5.714285714285714) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-12-06 23:07:38,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:07:38,855 INFO L93 Difference]: Finished difference Result 210 states and 293 transitions. [2021-12-06 23:07:38,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 23:07:38,855 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.714285714285714) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) Word has length 103 [2021-12-06 23:07:38,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:07:38,857 INFO L225 Difference]: With dead ends: 210 [2021-12-06 23:07:38,857 INFO L226 Difference]: Without dead ends: 208 [2021-12-06 23:07:38,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-06 23:07:38,858 INFO L933 BasicCegarLoop]: 160 mSDtfsCounter, 16 mSDsluCounter, 922 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 1082 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:07:38,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 1082 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:07:38,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-12-06 23:07:38,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 207. [2021-12-06 23:07:38,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 128 states have (on average 1.1328125) internal successors, (145), 132 states have internal predecessors, (145), 63 states have call successors, (63), 14 states have call predecessors, (63), 15 states have return successors, (82), 60 states have call predecessors, (82), 61 states have call successors, (82) [2021-12-06 23:07:38,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 290 transitions. [2021-12-06 23:07:38,872 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 290 transitions. Word has length 103 [2021-12-06 23:07:38,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:07:38,873 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 290 transitions. [2021-12-06 23:07:38,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.714285714285714) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-12-06 23:07:38,873 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 290 transitions. [2021-12-06 23:07:38,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-12-06 23:07:38,875 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:07:38,875 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:07:38,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-06 23:07:38,875 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:07:38,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:07:38,876 INFO L85 PathProgramCache]: Analyzing trace with hash -912199724, now seen corresponding path program 2 times [2021-12-06 23:07:38,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:07:38,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358138599] [2021-12-06 23:07:38,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:07:38,876 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:07:38,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:38,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 23:07:38,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:38,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 23:07:38,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:38,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 23:07:39,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:39,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-06 23:07:39,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:39,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-06 23:07:39,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:39,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-06 23:07:39,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:39,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-06 23:07:39,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:39,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-06 23:07:39,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:39,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-06 23:07:39,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:39,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-06 23:07:39,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:39,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-06 23:07:39,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:39,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-06 23:07:39,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:39,125 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 3 proven. 26 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-12-06 23:07:39,125 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:07:39,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358138599] [2021-12-06 23:07:39,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358138599] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:07:39,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368215238] [2021-12-06 23:07:39,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 23:07:39,126 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:07:39,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0adc387-e7df-4069-9c09-29814be0ed52/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:07:39,127 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0adc387-e7df-4069-9c09-29814be0ed52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:07:39,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0adc387-e7df-4069-9c09-29814be0ed52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 23:07:39,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 23:07:39,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:07:39,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 2636 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-06 23:07:39,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:07:39,559 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-12-06 23:07:39,559 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 23:07:39,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368215238] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:07:39,560 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 23:07:39,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 10 [2021-12-06 23:07:39,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159069511] [2021-12-06 23:07:39,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:07:39,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 23:07:39,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:07:39,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 23:07:39,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-06 23:07:39,562 INFO L87 Difference]: Start difference. First operand 207 states and 290 transitions. Second operand has 9 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-06 23:07:39,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:07:39,664 INFO L93 Difference]: Finished difference Result 338 states and 487 transitions. [2021-12-06 23:07:39,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 23:07:39,665 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 107 [2021-12-06 23:07:39,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:07:39,667 INFO L225 Difference]: With dead ends: 338 [2021-12-06 23:07:39,667 INFO L226 Difference]: Without dead ends: 212 [2021-12-06 23:07:39,669 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-12-06 23:07:39,669 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 12 mSDsluCounter, 994 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1143 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:07:39,670 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 1143 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 23:07:39,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-12-06 23:07:39,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2021-12-06 23:07:39,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 132 states have (on average 1.128787878787879) internal successors, (149), 137 states have internal predecessors, (149), 63 states have call successors, (63), 14 states have call predecessors, (63), 16 states have return successors, (93), 60 states have call predecessors, (93), 61 states have call successors, (93) [2021-12-06 23:07:39,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 305 transitions. [2021-12-06 23:07:39,691 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 305 transitions. Word has length 107 [2021-12-06 23:07:39,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:07:39,692 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 305 transitions. [2021-12-06 23:07:39,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-06 23:07:39,692 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 305 transitions. [2021-12-06 23:07:39,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-12-06 23:07:39,693 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:07:39,694 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 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] [2021-12-06 23:07:39,731 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0adc387-e7df-4069-9c09-29814be0ed52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 23:07:39,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0adc387-e7df-4069-9c09-29814be0ed52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-06 23:07:39,895 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:07:39,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:07:39,895 INFO L85 PathProgramCache]: Analyzing trace with hash 411830111, now seen corresponding path program 1 times [2021-12-06 23:07:39,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:07:39,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905398359] [2021-12-06 23:07:39,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:07:39,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:07:40,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:40,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 23:07:40,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:40,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 23:07:40,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:40,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 23:07:40,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:40,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 23:07:40,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:40,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 23:07:40,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:40,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 23:07:40,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:40,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-06 23:07:40,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:40,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-06 23:07:40,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:40,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-06 23:07:40,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:40,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-06 23:07:40,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:40,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-06 23:07:40,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:40,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-06 23:07:40,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:40,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-06 23:07:40,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:40,264 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 12 proven. 21 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-12-06 23:07:40,265 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:07:40,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905398359] [2021-12-06 23:07:40,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905398359] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:07:40,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378206212] [2021-12-06 23:07:40,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:07:40,265 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:07:40,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0adc387-e7df-4069-9c09-29814be0ed52/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:07:40,266 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0adc387-e7df-4069-9c09-29814be0ed52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:07:40,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0adc387-e7df-4069-9c09-29814be0ed52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 23:07:40,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:40,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 2669 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-06 23:07:40,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:07:40,711 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-12-06 23:07:40,711 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 23:07:40,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378206212] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:07:40,712 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 23:07:40,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11] total 18 [2021-12-06 23:07:40,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093318316] [2021-12-06 23:07:40,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:07:40,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 23:07:40,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:07:40,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 23:07:40,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-12-06 23:07:40,713 INFO L87 Difference]: Start difference. First operand 212 states and 305 transitions. Second operand has 9 states, 8 states have (on average 7.75) internal successors, (62), 8 states have internal predecessors, (62), 3 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-12-06 23:07:40,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:07:40,826 INFO L93 Difference]: Finished difference Result 349 states and 498 transitions. [2021-12-06 23:07:40,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 23:07:40,826 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 7.75) internal successors, (62), 8 states have internal predecessors, (62), 3 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 110 [2021-12-06 23:07:40,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:07:40,828 INFO L225 Difference]: With dead ends: 349 [2021-12-06 23:07:40,828 INFO L226 Difference]: Without dead ends: 212 [2021-12-06 23:07:40,829 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-12-06 23:07:40,829 INFO L933 BasicCegarLoop]: 148 mSDtfsCounter, 12 mSDsluCounter, 988 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1136 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:07:40,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 1136 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 23:07:40,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-12-06 23:07:40,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2021-12-06 23:07:40,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 132 states have (on average 1.128787878787879) internal successors, (149), 137 states have internal predecessors, (149), 63 states have call successors, (63), 14 states have call predecessors, (63), 16 states have return successors, (91), 60 states have call predecessors, (91), 61 states have call successors, (91) [2021-12-06 23:07:40,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 303 transitions. [2021-12-06 23:07:40,842 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 303 transitions. Word has length 110 [2021-12-06 23:07:40,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:07:40,843 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 303 transitions. [2021-12-06 23:07:40,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 7.75) internal successors, (62), 8 states have internal predecessors, (62), 3 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-12-06 23:07:40,843 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 303 transitions. [2021-12-06 23:07:40,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-06 23:07:40,844 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:07:40,845 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 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] [2021-12-06 23:07:40,880 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0adc387-e7df-4069-9c09-29814be0ed52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 23:07:41,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0adc387-e7df-4069-9c09-29814be0ed52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-06 23:07:41,045 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:07:41,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:07:41,046 INFO L85 PathProgramCache]: Analyzing trace with hash -712076360, now seen corresponding path program 1 times [2021-12-06 23:07:41,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:07:41,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54682256] [2021-12-06 23:07:41,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:07:41,046 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:07:41,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:41,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 23:07:41,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:41,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 23:07:41,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:41,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 23:07:41,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:41,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 23:07:41,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:41,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 23:07:41,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:41,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 23:07:41,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:41,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-06 23:07:41,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:41,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-06 23:07:41,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:41,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-06 23:07:41,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:41,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-06 23:07:41,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:41,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-06 23:07:41,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:41,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-06 23:07:41,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:41,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-06 23:07:41,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:41,435 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 12 proven. 21 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-12-06 23:07:41,435 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:07:41,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54682256] [2021-12-06 23:07:41,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54682256] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:07:41,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16040993] [2021-12-06 23:07:41,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:07:41,436 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:07:41,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0adc387-e7df-4069-9c09-29814be0ed52/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:07:41,437 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0adc387-e7df-4069-9c09-29814be0ed52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:07:41,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0adc387-e7df-4069-9c09-29814be0ed52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 23:07:41,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:41,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 2679 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-06 23:07:41,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:07:41,873 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 27 treesize of output 15 [2021-12-06 23:07:41,964 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-12-06 23:07:41,964 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 23:07:41,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16040993] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:07:41,965 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 23:07:41,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11] total 16 [2021-12-06 23:07:41,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082127227] [2021-12-06 23:07:41,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:07:41,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 23:07:41,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:07:41,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 23:07:41,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-12-06 23:07:41,966 INFO L87 Difference]: Start difference. First operand 212 states and 303 transitions. Second operand has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 8 states have internal predecessors, (58), 3 states have call successors, (15), 3 states have call predecessors, (15), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-12-06 23:07:42,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:07:42,389 INFO L93 Difference]: Finished difference Result 391 states and 592 transitions. [2021-12-06 23:07:42,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 23:07:42,389 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 8 states have internal predecessors, (58), 3 states have call successors, (15), 3 states have call predecessors, (15), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 112 [2021-12-06 23:07:42,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:07:42,391 INFO L225 Difference]: With dead ends: 391 [2021-12-06 23:07:42,391 INFO L226 Difference]: Without dead ends: 263 [2021-12-06 23:07:42,392 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 132 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-12-06 23:07:42,393 INFO L933 BasicCegarLoop]: 150 mSDtfsCounter, 132 mSDsluCounter, 665 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 815 SdHoareTripleChecker+Invalid, 536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 23:07:42,393 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 815 Invalid, 536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 367 Invalid, 0 Unknown, 105 Unchecked, 0.3s Time] [2021-12-06 23:07:42,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-12-06 23:07:42,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 216. [2021-12-06 23:07:42,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 135 states have (on average 1.1185185185185185) internal successors, (151), 140 states have internal predecessors, (151), 63 states have call successors, (63), 15 states have call predecessors, (63), 17 states have return successors, (91), 60 states have call predecessors, (91), 61 states have call successors, (91) [2021-12-06 23:07:42,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 305 transitions. [2021-12-06 23:07:42,407 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 305 transitions. Word has length 112 [2021-12-06 23:07:42,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:07:42,407 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 305 transitions. [2021-12-06 23:07:42,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 8 states have internal predecessors, (58), 3 states have call successors, (15), 3 states have call predecessors, (15), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-12-06 23:07:42,408 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 305 transitions. [2021-12-06 23:07:42,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-06 23:07:42,409 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:07:42,409 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 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] [2021-12-06 23:07:42,438 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0adc387-e7df-4069-9c09-29814be0ed52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-06 23:07:42,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0adc387-e7df-4069-9c09-29814be0ed52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:07:42,611 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:07:42,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:07:42,612 INFO L85 PathProgramCache]: Analyzing trace with hash -203406202, now seen corresponding path program 1 times [2021-12-06 23:07:42,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:07:42,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15932009] [2021-12-06 23:07:42,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:07:42,613 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:07:42,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:42,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 23:07:42,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:42,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 23:07:42,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:42,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 23:07:42,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:42,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-06 23:07:42,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:42,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-06 23:07:42,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:42,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-06 23:07:42,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:42,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-06 23:07:42,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:42,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-06 23:07:42,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:42,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-06 23:07:42,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:42,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-06 23:07:42,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:42,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-06 23:07:42,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:42,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-06 23:07:42,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:42,999 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 18 proven. 21 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-12-06 23:07:42,999 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:07:43,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15932009] [2021-12-06 23:07:43,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15932009] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:07:43,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686763947] [2021-12-06 23:07:43,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:07:43,000 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:07:43,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0adc387-e7df-4069-9c09-29814be0ed52/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:07:43,001 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0adc387-e7df-4069-9c09-29814be0ed52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:07:43,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0adc387-e7df-4069-9c09-29814be0ed52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 23:07:43,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:43,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 2656 conjuncts, 50 conjunts are in the unsatisfiable core [2021-12-06 23:07:43,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:07:45,983 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 25 treesize of output 17 [2021-12-06 23:07:45,987 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 21 treesize of output 13 [2021-12-06 23:07:45,989 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 18 treesize of output 10 [2021-12-06 23:07:46,072 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-12-06 23:07:46,072 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 23:07:46,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686763947] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:07:46,072 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 23:07:46,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [12] total 24 [2021-12-06 23:07:46,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879510085] [2021-12-06 23:07:46,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:07:46,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-06 23:07:46,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:07:46,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-06 23:07:46,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-12-06 23:07:46,074 INFO L87 Difference]: Start difference. First operand 216 states and 305 transitions. Second operand has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 12 states have internal predecessors, (62), 3 states have call successors, (14), 3 states have call predecessors, (14), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-06 23:07:49,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:07:49,292 INFO L93 Difference]: Finished difference Result 422 states and 655 transitions. [2021-12-06 23:07:49,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-06 23:07:49,292 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 12 states have internal predecessors, (62), 3 states have call successors, (14), 3 states have call predecessors, (14), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 111 [2021-12-06 23:07:49,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:07:49,295 INFO L225 Difference]: With dead ends: 422 [2021-12-06 23:07:49,295 INFO L226 Difference]: Without dead ends: 297 [2021-12-06 23:07:49,296 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 124 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=206, Invalid=849, Unknown=1, NotChecked=0, Total=1056 [2021-12-06 23:07:49,296 INFO L933 BasicCegarLoop]: 159 mSDtfsCounter, 190 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 976 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 622 SdHoareTripleChecker+Invalid, 1234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 976 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 176 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 23:07:49,296 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 622 Invalid, 1234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 976 Invalid, 0 Unknown, 176 Unchecked, 0.7s Time] [2021-12-06 23:07:49,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-12-06 23:07:49,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 234. [2021-12-06 23:07:49,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 150 states have (on average 1.1266666666666667) internal successors, (169), 155 states have internal predecessors, (169), 64 states have call successors, (64), 16 states have call predecessors, (64), 19 states have return successors, (106), 62 states have call predecessors, (106), 62 states have call successors, (106) [2021-12-06 23:07:49,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 339 transitions. [2021-12-06 23:07:49,314 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 339 transitions. Word has length 111 [2021-12-06 23:07:49,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:07:49,315 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 339 transitions. [2021-12-06 23:07:49,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 12 states have internal predecessors, (62), 3 states have call successors, (14), 3 states have call predecessors, (14), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-06 23:07:49,315 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 339 transitions. [2021-12-06 23:07:49,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-06 23:07:49,316 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:07:49,316 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 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] [2021-12-06 23:07:49,339 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0adc387-e7df-4069-9c09-29814be0ed52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-06 23:07:49,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0adc387-e7df-4069-9c09-29814be0ed52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-06 23:07:49,517 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:07:49,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:07:49,517 INFO L85 PathProgramCache]: Analyzing trace with hash -2143988216, now seen corresponding path program 1 times [2021-12-06 23:07:49,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:07:49,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335561292] [2021-12-06 23:07:49,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:07:49,518 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:07:49,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:49,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 23:07:49,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:49,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 23:07:49,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:49,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 23:07:49,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:49,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-06 23:07:49,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:49,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-06 23:07:49,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:49,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-06 23:07:49,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:49,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-06 23:07:49,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:49,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-06 23:07:49,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:49,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-06 23:07:49,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:49,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-06 23:07:49,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:49,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-06 23:07:49,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:49,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-06 23:07:49,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:49,663 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-12-06 23:07:49,663 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:07:49,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335561292] [2021-12-06 23:07:49,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335561292] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:07:49,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639882176] [2021-12-06 23:07:49,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:07:49,664 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:07:49,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0adc387-e7df-4069-9c09-29814be0ed52/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:07:49,664 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0adc387-e7df-4069-9c09-29814be0ed52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:07:49,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0adc387-e7df-4069-9c09-29814be0ed52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-06 23:07:49,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:49,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 2651 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 23:07:49,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:07:50,013 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-12-06 23:07:50,013 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 23:07:50,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639882176] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:07:50,013 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 23:07:50,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2021-12-06 23:07:50,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058806425] [2021-12-06 23:07:50,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:07:50,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 23:07:50,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:07:50,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 23:07:50,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 23:07:50,015 INFO L87 Difference]: Start difference. First operand 234 states and 339 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, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-06 23:07:50,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:07:50,038 INFO L93 Difference]: Finished difference Result 392 states and 582 transitions. [2021-12-06 23:07:50,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 23:07:50,038 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, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 111 [2021-12-06 23:07:50,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:07:50,040 INFO L225 Difference]: With dead ends: 392 [2021-12-06 23:07:50,040 INFO L226 Difference]: Without dead ends: 230 [2021-12-06 23:07:50,041 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 23:07:50,042 INFO L933 BasicCegarLoop]: 157 mSDtfsCounter, 6 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:07:50,042 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 454 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:07:50,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-12-06 23:07:50,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 224. [2021-12-06 23:07:50,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 142 states have (on average 1.1056338028169015) internal successors, (157), 147 states have internal predecessors, (157), 63 states have call successors, (63), 16 states have call predecessors, (63), 18 states have return successors, (91), 60 states have call predecessors, (91), 61 states have call successors, (91) [2021-12-06 23:07:50,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 311 transitions. [2021-12-06 23:07:50,056 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 311 transitions. Word has length 111 [2021-12-06 23:07:50,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:07:50,056 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 311 transitions. [2021-12-06 23:07:50,057 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, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-06 23:07:50,057 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 311 transitions. [2021-12-06 23:07:50,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-12-06 23:07:50,058 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:07:50,058 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 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] [2021-12-06 23:07:50,082 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0adc387-e7df-4069-9c09-29814be0ed52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-06 23:07:50,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0adc387-e7df-4069-9c09-29814be0ed52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:07:50,259 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:07:50,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:07:50,259 INFO L85 PathProgramCache]: Analyzing trace with hash 929000903, now seen corresponding path program 2 times [2021-12-06 23:07:50,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:07:50,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960148423] [2021-12-06 23:07:50,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:07:50,259 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:07:50,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:50,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 23:07:50,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:50,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 23:07:50,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:50,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 23:07:50,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:50,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-06 23:07:50,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:50,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-06 23:07:50,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:50,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 23:07:50,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:50,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-06 23:07:50,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:50,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-06 23:07:50,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:50,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-06 23:07:50,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:50,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-06 23:07:50,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:50,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-06 23:07:50,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:50,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-06 23:07:50,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:50,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-06 23:07:50,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:50,545 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 18 proven. 21 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-12-06 23:07:50,545 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:07:50,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960148423] [2021-12-06 23:07:50,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960148423] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:07:50,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035978444] [2021-12-06 23:07:50,546 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 23:07:50,546 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:07:50,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0adc387-e7df-4069-9c09-29814be0ed52/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:07:50,547 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0adc387-e7df-4069-9c09-29814be0ed52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:07:50,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0adc387-e7df-4069-9c09-29814be0ed52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-06 23:07:50,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 23:07:50,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:07:50,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 2701 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-06 23:07:50,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:07:50,899 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 13 treesize of output 9 [2021-12-06 23:07:50,903 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 13 treesize of output 9 [2021-12-06 23:07:51,084 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 15 treesize of output 7 [2021-12-06 23:07:51,086 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 15 treesize of output 7 [2021-12-06 23:07:51,153 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-12-06 23:07:51,153 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 23:07:51,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035978444] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:07:51,153 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 23:07:51,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 17 [2021-12-06 23:07:51,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352947045] [2021-12-06 23:07:51,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:07:51,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 23:07:51,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:07:51,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 23:07:51,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-12-06 23:07:51,155 INFO L87 Difference]: Start difference. First operand 224 states and 311 transitions. Second operand has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-12-06 23:07:51,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:07:51,351 INFO L93 Difference]: Finished difference Result 443 states and 641 transitions. [2021-12-06 23:07:51,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 23:07:51,351 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 118 [2021-12-06 23:07:51,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:07:51,353 INFO L225 Difference]: With dead ends: 443 [2021-12-06 23:07:51,353 INFO L226 Difference]: Without dead ends: 286 [2021-12-06 23:07:51,354 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 136 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-12-06 23:07:51,355 INFO L933 BasicCegarLoop]: 208 mSDtfsCounter, 84 mSDsluCounter, 745 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 953 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:07:51,355 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 953 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 164 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2021-12-06 23:07:51,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-12-06 23:07:51,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 234. [2021-12-06 23:07:51,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 150 states have (on average 1.1) internal successors, (165), 156 states have internal predecessors, (165), 64 states have call successors, (64), 17 states have call predecessors, (64), 19 states have return successors, (92), 60 states have call predecessors, (92), 62 states have call successors, (92) [2021-12-06 23:07:51,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 321 transitions. [2021-12-06 23:07:51,371 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 321 transitions. Word has length 118 [2021-12-06 23:07:51,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:07:51,371 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 321 transitions. [2021-12-06 23:07:51,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-12-06 23:07:51,371 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 321 transitions. [2021-12-06 23:07:51,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-12-06 23:07:51,373 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:07:51,373 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1] [2021-12-06 23:07:51,396 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0adc387-e7df-4069-9c09-29814be0ed52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-06 23:07:51,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0adc387-e7df-4069-9c09-29814be0ed52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-06 23:07:51,573 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:07:51,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:07:51,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1964022057, now seen corresponding path program 1 times [2021-12-06 23:07:51,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:07:51,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821291954] [2021-12-06 23:07:51,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:07:51,574 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:07:51,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:51,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 23:07:51,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:51,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 23:07:51,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:51,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 23:07:51,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:51,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:07:51,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:51,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 23:07:51,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:51,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-06 23:07:51,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:51,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-06 23:07:51,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:51,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-06 23:07:51,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:51,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-06 23:07:51,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:51,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-06 23:07:51,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:51,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-06 23:07:51,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:51,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-06 23:07:51,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:51,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-06 23:07:51,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:51,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-12-06 23:07:51,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:51,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-12-06 23:07:51,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:51,890 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 18 proven. 21 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2021-12-06 23:07:51,891 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:07:51,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821291954] [2021-12-06 23:07:51,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821291954] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:07:51,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644239179] [2021-12-06 23:07:51,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:07:51,891 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:07:51,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0adc387-e7df-4069-9c09-29814be0ed52/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:07:51,892 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0adc387-e7df-4069-9c09-29814be0ed52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:07:51,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0adc387-e7df-4069-9c09-29814be0ed52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-06 23:07:52,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:52,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 2738 conjuncts, 88 conjunts are in the unsatisfiable core [2021-12-06 23:07:52,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:07:52,254 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 13 treesize of output 9 [2021-12-06 23:07:52,432 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 23:07:52,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 23 [2021-12-06 23:07:52,435 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 8 treesize of output 4 [2021-12-06 23:07:52,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:07:52,480 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 23:07:52,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 29 [2021-12-06 23:07:53,461 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 65 proven. 58 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-06 23:07:53,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:07:53,841 INFO L354 Elim1Store]: treesize reduction 8, result has 46.7 percent of original size [2021-12-06 23:07:53,841 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 30 treesize of output 25 [2021-12-06 23:07:53,934 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 34 proven. 10 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-12-06 23:07:53,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644239179] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:07:53,935 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:07:53,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 25, 11] total 42 [2021-12-06 23:07:53,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051429388] [2021-12-06 23:07:53,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:07:53,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-12-06 23:07:53,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:07:53,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-12-06 23:07:53,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1576, Unknown=0, NotChecked=0, Total=1722 [2021-12-06 23:07:53,937 INFO L87 Difference]: Start difference. First operand 234 states and 321 transitions. Second operand has 42 states, 40 states have (on average 3.975) internal successors, (159), 38 states have internal predecessors, (159), 12 states have call successors, (41), 7 states have call predecessors, (41), 9 states have return successors, (37), 11 states have call predecessors, (37), 12 states have call successors, (37) [2021-12-06 23:07:59,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:07:59,810 INFO L93 Difference]: Finished difference Result 643 states and 961 transitions. [2021-12-06 23:07:59,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-12-06 23:07:59,810 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 40 states have (on average 3.975) internal successors, (159), 38 states have internal predecessors, (159), 12 states have call successors, (41), 7 states have call predecessors, (41), 9 states have return successors, (37), 11 states have call predecessors, (37), 12 states have call successors, (37) Word has length 129 [2021-12-06 23:07:59,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:07:59,814 INFO L225 Difference]: With dead ends: 643 [2021-12-06 23:07:59,814 INFO L226 Difference]: Without dead ends: 496 [2021-12-06 23:07:59,818 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 265 SyntacticMatches, 12 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3389 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1110, Invalid=10020, Unknown=0, NotChecked=0, Total=11130 [2021-12-06 23:07:59,818 INFO L933 BasicCegarLoop]: 212 mSDtfsCounter, 528 mSDsluCounter, 2768 mSDsCounter, 0 mSdLazyCounter, 5703 mSolverCounterSat, 671 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 548 SdHoareTripleChecker+Valid, 2980 SdHoareTripleChecker+Invalid, 8334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 671 IncrementalHoareTripleChecker+Valid, 5703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1960 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:07:59,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [548 Valid, 2980 Invalid, 8334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [671 Valid, 5703 Invalid, 0 Unknown, 1960 Unchecked, 3.1s Time] [2021-12-06 23:07:59,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2021-12-06 23:07:59,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 359. [2021-12-06 23:07:59,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 231 states have (on average 1.0995670995670996) internal successors, (254), 239 states have internal predecessors, (254), 99 states have call successors, (99), 25 states have call predecessors, (99), 28 states have return successors, (140), 94 states have call predecessors, (140), 97 states have call successors, (140) [2021-12-06 23:07:59,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 493 transitions. [2021-12-06 23:07:59,846 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 493 transitions. Word has length 129 [2021-12-06 23:07:59,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:07:59,846 INFO L470 AbstractCegarLoop]: Abstraction has 359 states and 493 transitions. [2021-12-06 23:07:59,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 40 states have (on average 3.975) internal successors, (159), 38 states have internal predecessors, (159), 12 states have call successors, (41), 7 states have call predecessors, (41), 9 states have return successors, (37), 11 states have call predecessors, (37), 12 states have call successors, (37) [2021-12-06 23:07:59,847 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 493 transitions. [2021-12-06 23:07:59,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-06 23:07:59,848 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:07:59,849 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:07:59,872 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0adc387-e7df-4069-9c09-29814be0ed52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-06 23:08:00,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0adc387-e7df-4069-9c09-29814be0ed52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-06 23:08:00,050 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:08:00,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:08:00,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1436008680, now seen corresponding path program 1 times [2021-12-06 23:08:00,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:08:00,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136570851] [2021-12-06 23:08:00,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:08:00,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:08:00,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:00,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 23:08:00,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:00,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 23:08:00,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:00,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 23:08:00,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:00,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:08:00,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:00,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 23:08:00,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:00,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-06 23:08:00,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:00,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-06 23:08:00,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:00,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-06 23:08:00,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:00,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-06 23:08:00,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:00,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-06 23:08:00,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:00,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-06 23:08:00,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:00,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-06 23:08:00,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:00,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-06 23:08:00,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:00,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-12-06 23:08:00,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:00,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-06 23:08:00,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:00,378 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-12-06 23:08:00,378 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:08:00,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136570851] [2021-12-06 23:08:00,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136570851] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:08:00,378 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:08:00,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-06 23:08:00,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937653204] [2021-12-06 23:08:00,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:08:00,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-06 23:08:00,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:08:00,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-06 23:08:00,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-12-06 23:08:00,380 INFO L87 Difference]: Start difference. First operand 359 states and 493 transitions. Second operand has 14 states, 13 states have (on average 4.461538461538462) internal successors, (58), 11 states have internal predecessors, (58), 2 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2021-12-06 23:08:00,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:08:00,810 INFO L93 Difference]: Finished difference Result 367 states and 501 transitions. [2021-12-06 23:08:00,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-06 23:08:00,810 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 4.461538461538462) internal successors, (58), 11 states have internal predecessors, (58), 2 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) Word has length 135 [2021-12-06 23:08:00,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:08:00,813 INFO L225 Difference]: With dead ends: 367 [2021-12-06 23:08:00,813 INFO L226 Difference]: Without dead ends: 365 [2021-12-06 23:08:00,813 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2021-12-06 23:08:00,814 INFO L933 BasicCegarLoop]: 157 mSDtfsCounter, 77 mSDsluCounter, 1290 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 1447 SdHoareTripleChecker+Invalid, 606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 23:08:00,814 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 1447 Invalid, 606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 23:08:00,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-12-06 23:08:00,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 364. [2021-12-06 23:08:00,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 234 states have (on average 1.0982905982905984) internal successors, (257), 242 states have internal predecessors, (257), 100 states have call successors, (100), 26 states have call predecessors, (100), 29 states have return successors, (141), 95 states have call predecessors, (141), 98 states have call successors, (141) [2021-12-06 23:08:00,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 498 transitions. [2021-12-06 23:08:00,836 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 498 transitions. Word has length 135 [2021-12-06 23:08:00,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:08:00,837 INFO L470 AbstractCegarLoop]: Abstraction has 364 states and 498 transitions. [2021-12-06 23:08:00,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 4.461538461538462) internal successors, (58), 11 states have internal predecessors, (58), 2 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2021-12-06 23:08:00,837 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 498 transitions. [2021-12-06 23:08:00,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-12-06 23:08:00,839 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:08:00,839 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:08:00,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-06 23:08:00,839 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:08:00,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:08:00,840 INFO L85 PathProgramCache]: Analyzing trace with hash 2134105364, now seen corresponding path program 1 times [2021-12-06 23:08:00,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:08:00,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251464466] [2021-12-06 23:08:00,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:08:00,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:08:00,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:00,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 23:08:00,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:00,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 23:08:00,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:00,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 23:08:00,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:00,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 23:08:00,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:00,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 23:08:00,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:00,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-06 23:08:00,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:00,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-06 23:08:00,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:00,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-06 23:08:00,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:00,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:08:00,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:01,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 23:08:01,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:01,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 23:08:01,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:01,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 23:08:01,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:01,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 23:08:01,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:01,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-06 23:08:01,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:01,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-06 23:08:01,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:01,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-12-06 23:08:01,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:01,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-06 23:08:01,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:01,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-06 23:08:01,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:01,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2021-12-06 23:08:01,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:01,059 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 24 proven. 4 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2021-12-06 23:08:01,059 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:08:01,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251464466] [2021-12-06 23:08:01,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251464466] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:08:01,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541628553] [2021-12-06 23:08:01,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:08:01,059 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:08:01,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0adc387-e7df-4069-9c09-29814be0ed52/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:08:01,060 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0adc387-e7df-4069-9c09-29814be0ed52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:08:01,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0adc387-e7df-4069-9c09-29814be0ed52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-06 23:08:01,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:01,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 2739 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 23:08:01,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:08:01,447 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 94 proven. 84 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-12-06 23:08:01,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:08:01,614 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 24 proven. 4 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2021-12-06 23:08:01,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541628553] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:08:01,614 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:08:01,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2021-12-06 23:08:01,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472174892] [2021-12-06 23:08:01,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:08:01,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-06 23:08:01,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:08:01,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-06 23:08:01,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-12-06 23:08:01,616 INFO L87 Difference]: Start difference. First operand 364 states and 498 transitions. Second operand has 15 states, 12 states have (on average 8.166666666666666) internal successors, (98), 14 states have internal predecessors, (98), 10 states have call successors, (41), 4 states have call predecessors, (41), 5 states have return successors, (40), 7 states have call predecessors, (40), 10 states have call successors, (40) [2021-12-06 23:08:01,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:08:01,918 INFO L93 Difference]: Finished difference Result 463 states and 643 transitions. [2021-12-06 23:08:01,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 23:08:01,919 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 8.166666666666666) internal successors, (98), 14 states have internal predecessors, (98), 10 states have call successors, (41), 4 states have call predecessors, (41), 5 states have return successors, (40), 7 states have call predecessors, (40), 10 states have call successors, (40) Word has length 139 [2021-12-06 23:08:01,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:08:01,921 INFO L225 Difference]: With dead ends: 463 [2021-12-06 23:08:01,921 INFO L226 Difference]: Without dead ends: 364 [2021-12-06 23:08:01,922 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 308 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-12-06 23:08:01,922 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 184 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 23:08:01,923 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 531 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 23:08:01,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-12-06 23:08:01,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 364. [2021-12-06 23:08:01,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 234 states have (on average 1.0982905982905984) internal successors, (257), 242 states have internal predecessors, (257), 100 states have call successors, (100), 26 states have call predecessors, (100), 29 states have return successors, (137), 95 states have call predecessors, (137), 98 states have call successors, (137) [2021-12-06 23:08:01,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 494 transitions. [2021-12-06 23:08:01,947 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 494 transitions. Word has length 139 [2021-12-06 23:08:01,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:08:01,947 INFO L470 AbstractCegarLoop]: Abstraction has 364 states and 494 transitions. [2021-12-06 23:08:01,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 8.166666666666666) internal successors, (98), 14 states have internal predecessors, (98), 10 states have call successors, (41), 4 states have call predecessors, (41), 5 states have return successors, (40), 7 states have call predecessors, (40), 10 states have call successors, (40) [2021-12-06 23:08:01,947 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 494 transitions. [2021-12-06 23:08:01,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-12-06 23:08:01,949 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:08:01,949 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2021-12-06 23:08:01,982 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0adc387-e7df-4069-9c09-29814be0ed52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-06 23:08:02,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0adc387-e7df-4069-9c09-29814be0ed52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:08:02,151 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:08:02,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:08:02,152 INFO L85 PathProgramCache]: Analyzing trace with hash 17582973, now seen corresponding path program 1 times [2021-12-06 23:08:02,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:08:02,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949996460] [2021-12-06 23:08:02,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:08:02,153 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:08:02,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:02,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 23:08:02,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:02,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 23:08:02,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:02,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 23:08:02,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:02,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:08:02,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:02,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 23:08:02,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:02,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-06 23:08:02,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:02,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-06 23:08:02,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:02,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-06 23:08:02,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:02,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-06 23:08:02,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:02,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-06 23:08:02,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:02,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-06 23:08:02,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:02,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-06 23:08:02,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:02,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-06 23:08:02,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:02,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-12-06 23:08:02,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:02,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-06 23:08:02,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:02,442 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 17 proven. 19 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-12-06 23:08:02,442 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:08:02,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949996460] [2021-12-06 23:08:02,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949996460] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:08:02,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408982038] [2021-12-06 23:08:02,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:08:02,443 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:08:02,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0adc387-e7df-4069-9c09-29814be0ed52/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:08:02,443 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0adc387-e7df-4069-9c09-29814be0ed52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:08:02,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0adc387-e7df-4069-9c09-29814be0ed52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-06 23:08:02,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:02,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 2785 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-06 23:08:02,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:08:02,836 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 123 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-06 23:08:02,836 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 23:08:02,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408982038] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:08:02,836 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 23:08:02,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 11 [2021-12-06 23:08:02,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069875825] [2021-12-06 23:08:02,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:08:02,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 23:08:02,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:08:02,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 23:08:02,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-12-06 23:08:02,837 INFO L87 Difference]: Start difference. First operand 364 states and 494 transitions. Second operand has 9 states, 8 states have (on average 9.25) internal successors, (74), 8 states have internal predecessors, (74), 3 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-12-06 23:08:02,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:08:02,922 INFO L93 Difference]: Finished difference Result 561 states and 755 transitions. [2021-12-06 23:08:02,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 23:08:02,922 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 9.25) internal successors, (74), 8 states have internal predecessors, (74), 3 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 136 [2021-12-06 23:08:02,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:08:02,924 INFO L225 Difference]: With dead ends: 561 [2021-12-06 23:08:02,925 INFO L226 Difference]: Without dead ends: 336 [2021-12-06 23:08:02,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 164 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-12-06 23:08:02,926 INFO L933 BasicCegarLoop]: 151 mSDtfsCounter, 12 mSDsluCounter, 1003 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1154 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:08:02,926 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 1154 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 23:08:02,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-12-06 23:08:02,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 326. [2021-12-06 23:08:02,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 211 states have (on average 1.099526066350711) internal successors, (232), 219 states have internal predecessors, (232), 87 states have call successors, (87), 25 states have call predecessors, (87), 27 states have return successors, (118), 81 states have call predecessors, (118), 85 states have call successors, (118) [2021-12-06 23:08:02,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 437 transitions. [2021-12-06 23:08:02,948 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 437 transitions. Word has length 136 [2021-12-06 23:08:02,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:08:02,948 INFO L470 AbstractCegarLoop]: Abstraction has 326 states and 437 transitions. [2021-12-06 23:08:02,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 9.25) internal successors, (74), 8 states have internal predecessors, (74), 3 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-12-06 23:08:02,948 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 437 transitions. [2021-12-06 23:08:02,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-12-06 23:08:02,950 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:08:02,950 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:08:02,973 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0adc387-e7df-4069-9c09-29814be0ed52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-06 23:08:03,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0adc387-e7df-4069-9c09-29814be0ed52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:08:03,151 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:08:03,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:08:03,152 INFO L85 PathProgramCache]: Analyzing trace with hash -32643708, now seen corresponding path program 2 times [2021-12-06 23:08:03,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:08:03,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143092338] [2021-12-06 23:08:03,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:08:03,153 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:08:03,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:03,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 23:08:03,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:03,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 23:08:03,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:03,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 23:08:03,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:03,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:08:03,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:03,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 23:08:03,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:03,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-06 23:08:03,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:03,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-06 23:08:03,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:03,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-06 23:08:03,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:03,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-06 23:08:03,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:03,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-06 23:08:03,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:03,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-06 23:08:03,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:03,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-06 23:08:03,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:03,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-12-06 23:08:03,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:03,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-12-06 23:08:03,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:03,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-06 23:08:03,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:03,958 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 30 proven. 3 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2021-12-06 23:08:03,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:08:03,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143092338] [2021-12-06 23:08:03,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143092338] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:08:03,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213389550] [2021-12-06 23:08:03,959 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 23:08:03,959 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:08:03,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0adc387-e7df-4069-9c09-29814be0ed52/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:08:03,960 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0adc387-e7df-4069-9c09-29814be0ed52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:08:03,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0adc387-e7df-4069-9c09-29814be0ed52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-06 23:08:04,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 23:08:04,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:08:04,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 2795 conjuncts, 94 conjunts are in the unsatisfiable core [2021-12-06 23:08:04,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:08:04,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 23:08:04,440 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-12-06 23:08:04,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 9 [2021-12-06 23:08:04,492 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 11 treesize of output 7 [2021-12-06 23:08:04,761 INFO L354 Elim1Store]: treesize reduction 20, result has 39.4 percent of original size [2021-12-06 23:08:04,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 22 [2021-12-06 23:08:04,792 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 23 treesize of output 23 [2021-12-06 23:08:06,873 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 23 treesize of output 23 [2021-12-06 23:08:21,379 INFO L354 Elim1Store]: treesize reduction 21, result has 46.2 percent of original size [2021-12-06 23:08:21,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 49 [2021-12-06 23:08:21,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-12-06 23:08:21,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 19 [2021-12-06 23:08:23,704 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 48 proven. 84 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-12-06 23:08:23,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:08:24,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213389550] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:08:24,927 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 23:08:24,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22] total 32 [2021-12-06 23:08:24,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448209174] [2021-12-06 23:08:24,927 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 23:08:24,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-06 23:08:24,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:08:24,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-06 23:08:24,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1251, Unknown=2, NotChecked=0, Total=1406 [2021-12-06 23:08:24,928 INFO L87 Difference]: Start difference. First operand 326 states and 437 transitions. Second operand has 32 states, 32 states have (on average 3.8125) internal successors, (122), 28 states have internal predecessors, (122), 12 states have call successors, (31), 8 states have call predecessors, (31), 7 states have return successors, (29), 14 states have call predecessors, (29), 11 states have call successors, (29) [2021-12-06 23:08:26,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:08:26,074 INFO L93 Difference]: Finished difference Result 525 states and 697 transitions. [2021-12-06 23:08:26,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-06 23:08:26,074 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.8125) internal successors, (122), 28 states have internal predecessors, (122), 12 states have call successors, (31), 8 states have call predecessors, (31), 7 states have return successors, (29), 14 states have call predecessors, (29), 11 states have call successors, (29) Word has length 138 [2021-12-06 23:08:26,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:08:26,077 INFO L225 Difference]: With dead ends: 525 [2021-12-06 23:08:26,077 INFO L226 Difference]: Without dead ends: 424 [2021-12-06 23:08:26,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 158 SyntacticMatches, 24 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1162 ImplicationChecksByTransitivity, 20.9s TimeCoverageRelationStatistics Valid=305, Invalid=2773, Unknown=2, NotChecked=0, Total=3080 [2021-12-06 23:08:26,079 INFO L933 BasicCegarLoop]: 166 mSDtfsCounter, 106 mSDsluCounter, 1192 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 1358 SdHoareTripleChecker+Invalid, 1073 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 426 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 23:08:26,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 1358 Invalid, 1073 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 592 Invalid, 0 Unknown, 426 Unchecked, 0.3s Time] [2021-12-06 23:08:26,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-12-06 23:08:26,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 394. [2021-12-06 23:08:26,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 262 states have (on average 1.0916030534351144) internal successors, (286), 272 states have internal predecessors, (286), 96 states have call successors, (96), 32 states have call predecessors, (96), 35 states have return successors, (139), 89 states have call predecessors, (139), 94 states have call successors, (139) [2021-12-06 23:08:26,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 521 transitions. [2021-12-06 23:08:26,103 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 521 transitions. Word has length 138 [2021-12-06 23:08:26,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:08:26,103 INFO L470 AbstractCegarLoop]: Abstraction has 394 states and 521 transitions. [2021-12-06 23:08:26,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.8125) internal successors, (122), 28 states have internal predecessors, (122), 12 states have call successors, (31), 8 states have call predecessors, (31), 7 states have return successors, (29), 14 states have call predecessors, (29), 11 states have call successors, (29) [2021-12-06 23:08:26,103 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 521 transitions. [2021-12-06 23:08:26,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-12-06 23:08:26,105 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:08:26,105 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:08:26,131 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0adc387-e7df-4069-9c09-29814be0ed52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-06 23:08:26,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0adc387-e7df-4069-9c09-29814be0ed52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:08:26,307 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:08:26,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:08:26,308 INFO L85 PathProgramCache]: Analyzing trace with hash 225521730, now seen corresponding path program 1 times [2021-12-06 23:08:26,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:08:26,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812181555] [2021-12-06 23:08:26,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:08:26,309 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:08:26,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:26,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 23:08:26,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:26,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 23:08:26,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:26,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 23:08:26,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:26,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:08:26,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:26,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 23:08:26,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:26,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-06 23:08:26,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:26,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-06 23:08:26,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:26,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-06 23:08:26,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:26,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-06 23:08:26,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:26,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-06 23:08:26,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:26,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-06 23:08:26,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:26,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-06 23:08:26,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:26,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-12-06 23:08:26,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:26,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-12-06 23:08:26,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:26,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-06 23:08:26,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:26,566 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2021-12-06 23:08:26,566 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:08:26,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812181555] [2021-12-06 23:08:26,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812181555] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:08:26,566 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:08:26,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 23:08:26,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220060736] [2021-12-06 23:08:26,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:08:26,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 23:08:26,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:08:26,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 23:08:26,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 23:08:26,567 INFO L87 Difference]: Start difference. First operand 394 states and 521 transitions. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2021-12-06 23:08:26,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:08:26,755 INFO L93 Difference]: Finished difference Result 504 states and 692 transitions. [2021-12-06 23:08:26,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 23:08:26,756 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) Word has length 138 [2021-12-06 23:08:26,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:08:26,758 INFO L225 Difference]: With dead ends: 504 [2021-12-06 23:08:26,758 INFO L226 Difference]: Without dead ends: 386 [2021-12-06 23:08:26,759 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-06 23:08:26,759 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 44 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 23:08:26,759 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 389 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 23:08:26,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2021-12-06 23:08:26,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 385. [2021-12-06 23:08:26,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 255 states have (on average 1.0862745098039215) internal successors, (277), 264 states have internal predecessors, (277), 95 states have call successors, (95), 32 states have call predecessors, (95), 34 states have return successors, (126), 88 states have call predecessors, (126), 93 states have call successors, (126) [2021-12-06 23:08:26,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 498 transitions. [2021-12-06 23:08:26,783 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 498 transitions. Word has length 138 [2021-12-06 23:08:26,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:08:26,783 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 498 transitions. [2021-12-06 23:08:26,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2021-12-06 23:08:26,783 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 498 transitions. [2021-12-06 23:08:26,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-12-06 23:08:26,785 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:08:26,785 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 7, 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] [2021-12-06 23:08:26,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-06 23:08:26,785 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:08:26,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:08:26,785 INFO L85 PathProgramCache]: Analyzing trace with hash 121582132, now seen corresponding path program 1 times [2021-12-06 23:08:26,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:08:26,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688949960] [2021-12-06 23:08:26,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:08:26,786 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:08:26,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:26,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 23:08:26,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:26,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 23:08:26,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:26,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 23:08:26,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:26,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 23:08:26,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:26,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 23:08:26,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:26,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-06 23:08:26,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:26,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-06 23:08:26,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:26,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-06 23:08:26,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:26,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:08:26,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:26,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 23:08:26,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:26,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 23:08:26,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:26,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 23:08:26,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:26,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 23:08:26,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:26,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-06 23:08:26,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:26,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-06 23:08:26,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:26,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-12-06 23:08:26,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:26,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-06 23:08:26,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:26,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-06 23:08:26,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:26,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-06 23:08:26,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:27,019 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 239 trivial. 0 not checked. [2021-12-06 23:08:27,020 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:08:27,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688949960] [2021-12-06 23:08:27,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688949960] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:08:27,020 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:08:27,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-06 23:08:27,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400649916] [2021-12-06 23:08:27,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:08:27,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 23:08:27,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:08:27,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 23:08:27,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-06 23:08:27,021 INFO L87 Difference]: Start difference. First operand 385 states and 498 transitions. Second operand has 9 states, 8 states have (on average 6.0) internal successors, (48), 6 states have internal predecessors, (48), 2 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) [2021-12-06 23:08:27,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:08:27,300 INFO L93 Difference]: Finished difference Result 395 states and 509 transitions. [2021-12-06 23:08:27,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 23:08:27,300 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.0) internal successors, (48), 6 states have internal predecessors, (48), 2 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) Word has length 143 [2021-12-06 23:08:27,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:08:27,302 INFO L225 Difference]: With dead ends: 395 [2021-12-06 23:08:27,302 INFO L226 Difference]: Without dead ends: 393 [2021-12-06 23:08:27,303 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-12-06 23:08:27,303 INFO L933 BasicCegarLoop]: 143 mSDtfsCounter, 50 mSDsluCounter, 719 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 862 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 23:08:27,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 862 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 23:08:27,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2021-12-06 23:08:27,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 391. [2021-12-06 23:08:27,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 258 states have (on average 1.0852713178294573) internal successors, (280), 267 states have internal predecessors, (280), 97 states have call successors, (97), 33 states have call predecessors, (97), 35 states have return successors, (128), 90 states have call predecessors, (128), 95 states have call successors, (128) [2021-12-06 23:08:27,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 505 transitions. [2021-12-06 23:08:27,328 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 505 transitions. Word has length 143 [2021-12-06 23:08:27,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:08:27,328 INFO L470 AbstractCegarLoop]: Abstraction has 391 states and 505 transitions. [2021-12-06 23:08:27,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.0) internal successors, (48), 6 states have internal predecessors, (48), 2 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) [2021-12-06 23:08:27,328 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 505 transitions. [2021-12-06 23:08:27,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-12-06 23:08:27,330 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:08:27,330 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 6, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:08:27,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-06 23:08:27,330 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:08:27,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:08:27,330 INFO L85 PathProgramCache]: Analyzing trace with hash 386312444, now seen corresponding path program 1 times [2021-12-06 23:08:27,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:08:27,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045166190] [2021-12-06 23:08:27,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:08:27,330 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:08:27,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:27,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 23:08:27,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:27,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 23:08:27,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:27,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 23:08:27,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:27,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 23:08:27,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:27,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 23:08:27,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:27,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-06 23:08:27,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:27,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-06 23:08:27,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:27,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-06 23:08:27,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:27,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:08:27,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:27,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 23:08:27,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:27,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 23:08:27,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:27,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 23:08:27,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:27,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 23:08:27,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:27,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-06 23:08:27,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:27,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-06 23:08:27,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:27,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-12-06 23:08:27,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:27,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-06 23:08:27,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:27,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-06 23:08:27,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:27,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-06 23:08:27,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:27,653 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 227 trivial. 0 not checked. [2021-12-06 23:08:27,653 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:08:27,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045166190] [2021-12-06 23:08:27,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045166190] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:08:27,653 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:08:27,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-06 23:08:27,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18233180] [2021-12-06 23:08:27,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:08:27,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-06 23:08:27,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:08:27,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-06 23:08:27,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-12-06 23:08:27,654 INFO L87 Difference]: Start difference. First operand 391 states and 505 transitions. Second operand has 12 states, 12 states have (on average 4.5) internal successors, (54), 10 states have internal predecessors, (54), 4 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (19), 5 states have call predecessors, (19), 3 states have call successors, (19) [2021-12-06 23:08:28,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:08:28,392 INFO L93 Difference]: Finished difference Result 541 states and 745 transitions. [2021-12-06 23:08:28,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 23:08:28,392 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 10 states have internal predecessors, (54), 4 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (19), 5 states have call predecessors, (19), 3 states have call successors, (19) Word has length 147 [2021-12-06 23:08:28,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:08:28,395 INFO L225 Difference]: With dead ends: 541 [2021-12-06 23:08:28,395 INFO L226 Difference]: Without dead ends: 432 [2021-12-06 23:08:28,396 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-12-06 23:08:28,396 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 79 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 1074 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 611 SdHoareTripleChecker+Invalid, 1132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1074 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 23:08:28,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 611 Invalid, 1132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1074 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-06 23:08:28,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2021-12-06 23:08:28,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 408. [2021-12-06 23:08:28,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 267 states have (on average 1.0898876404494382) internal successors, (291), 277 states have internal predecessors, (291), 104 states have call successors, (104), 33 states have call predecessors, (104), 36 states have return successors, (133), 97 states have call predecessors, (133), 102 states have call successors, (133) [2021-12-06 23:08:28,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 528 transitions. [2021-12-06 23:08:28,422 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 528 transitions. Word has length 147 [2021-12-06 23:08:28,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:08:28,423 INFO L470 AbstractCegarLoop]: Abstraction has 408 states and 528 transitions. [2021-12-06 23:08:28,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 10 states have internal predecessors, (54), 4 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (19), 5 states have call predecessors, (19), 3 states have call successors, (19) [2021-12-06 23:08:28,423 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 528 transitions. [2021-12-06 23:08:28,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-12-06 23:08:28,424 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:08:28,424 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 6, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:08:28,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-06 23:08:28,425 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:08:28,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:08:28,425 INFO L85 PathProgramCache]: Analyzing trace with hash 542080828, now seen corresponding path program 1 times [2021-12-06 23:08:28,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:08:28,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025009351] [2021-12-06 23:08:28,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:08:28,425 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:08:28,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:28,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 23:08:28,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:28,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 23:08:28,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:28,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 23:08:28,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:28,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 23:08:28,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:28,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 23:08:28,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:28,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-06 23:08:28,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:28,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-06 23:08:28,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:28,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-06 23:08:28,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:28,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:08:28,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:28,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 23:08:28,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:28,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 23:08:28,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:28,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 23:08:28,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:28,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 23:08:28,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:28,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-06 23:08:28,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:28,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-06 23:08:28,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:28,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-12-06 23:08:28,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:28,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-06 23:08:28,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:28,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-06 23:08:28,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:28,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2021-12-06 23:08:28,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:28,623 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 263 trivial. 0 not checked. [2021-12-06 23:08:28,623 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:08:28,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025009351] [2021-12-06 23:08:28,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025009351] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:08:28,623 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:08:28,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 23:08:28,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915286508] [2021-12-06 23:08:28,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:08:28,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 23:08:28,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:08:28,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 23:08:28,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 23:08:28,624 INFO L87 Difference]: Start difference. First operand 408 states and 528 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 3 states have internal predecessors, (52), 2 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-12-06 23:08:28,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:08:28,811 INFO L93 Difference]: Finished difference Result 481 states and 632 transitions. [2021-12-06 23:08:28,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 23:08:28,812 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 3 states have internal predecessors, (52), 2 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 150 [2021-12-06 23:08:28,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:08:28,814 INFO L225 Difference]: With dead ends: 481 [2021-12-06 23:08:28,814 INFO L226 Difference]: Without dead ends: 411 [2021-12-06 23:08:28,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 23:08:28,815 INFO L933 BasicCegarLoop]: 140 mSDtfsCounter, 34 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 23:08:28,815 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 269 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 23:08:28,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2021-12-06 23:08:28,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 411. [2021-12-06 23:08:28,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 270 states have (on average 1.0888888888888888) internal successors, (294), 280 states have internal predecessors, (294), 104 states have call successors, (104), 33 states have call predecessors, (104), 36 states have return successors, (133), 97 states have call predecessors, (133), 102 states have call successors, (133) [2021-12-06 23:08:28,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 531 transitions. [2021-12-06 23:08:28,841 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 531 transitions. Word has length 150 [2021-12-06 23:08:28,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:08:28,841 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 531 transitions. [2021-12-06 23:08:28,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 3 states have internal predecessors, (52), 2 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-12-06 23:08:28,841 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 531 transitions. [2021-12-06 23:08:28,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-12-06 23:08:28,842 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:08:28,843 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:08:28,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-06 23:08:28,843 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:08:28,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:08:28,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1517452615, now seen corresponding path program 1 times [2021-12-06 23:08:28,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:08:28,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708614204] [2021-12-06 23:08:28,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:08:28,843 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:08:28,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:28,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 23:08:28,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:28,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 23:08:28,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:28,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 23:08:28,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:28,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:08:28,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:28,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 23:08:28,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:29,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-06 23:08:29,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:29,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-06 23:08:29,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:29,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-06 23:08:29,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:29,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-06 23:08:29,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:29,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-06 23:08:29,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:29,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-06 23:08:29,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:29,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-06 23:08:29,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:29,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-12-06 23:08:29,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:29,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-12-06 23:08:29,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:29,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-06 23:08:29,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:29,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-06 23:08:29,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:29,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-12-06 23:08:29,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:29,150 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 38 proven. 21 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-12-06 23:08:29,151 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:08:29,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708614204] [2021-12-06 23:08:29,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708614204] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:08:29,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986066440] [2021-12-06 23:08:29,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:08:29,151 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:08:29,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0adc387-e7df-4069-9c09-29814be0ed52/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:08:29,152 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0adc387-e7df-4069-9c09-29814be0ed52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:08:29,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0adc387-e7df-4069-9c09-29814be0ed52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-06 23:08:29,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:29,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 2792 conjuncts, 42 conjunts are in the unsatisfiable core [2021-12-06 23:08:29,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:08:30,142 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 146 proven. 16 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-12-06 23:08:30,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:08:30,342 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 31 treesize of output 19 [2021-12-06 23:08:30,389 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-12-06 23:08:30,389 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 31 treesize of output 26 [2021-12-06 23:08:30,435 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 26 proven. 34 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2021-12-06 23:08:30,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986066440] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:08:30,435 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:08:30,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 11] total 19 [2021-12-06 23:08:30,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882442984] [2021-12-06 23:08:30,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:08:30,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-06 23:08:30,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:08:30,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-06 23:08:30,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-12-06 23:08:30,437 INFO L87 Difference]: Start difference. First operand 411 states and 531 transitions. Second operand has 19 states, 19 states have (on average 6.315789473684211) internal successors, (120), 17 states have internal predecessors, (120), 4 states have call successors, (33), 5 states have call predecessors, (33), 6 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) [2021-12-06 23:08:30,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:08:30,922 INFO L93 Difference]: Finished difference Result 567 states and 730 transitions. [2021-12-06 23:08:30,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 23:08:30,922 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 6.315789473684211) internal successors, (120), 17 states have internal predecessors, (120), 4 states have call successors, (33), 5 states have call predecessors, (33), 6 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) Word has length 149 [2021-12-06 23:08:30,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:08:30,924 INFO L225 Difference]: With dead ends: 567 [2021-12-06 23:08:30,924 INFO L226 Difference]: Without dead ends: 364 [2021-12-06 23:08:30,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 309 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=158, Invalid=654, Unknown=0, NotChecked=0, Total=812 [2021-12-06 23:08:30,925 INFO L933 BasicCegarLoop]: 150 mSDtfsCounter, 78 mSDsluCounter, 931 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 1081 SdHoareTripleChecker+Invalid, 825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 350 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 23:08:30,926 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 1081 Invalid, 825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 430 Invalid, 0 Unknown, 350 Unchecked, 0.3s Time] [2021-12-06 23:08:30,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-12-06 23:08:30,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 356. [2021-12-06 23:08:30,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 238 states have (on average 1.088235294117647) internal successors, (259), 245 states have internal predecessors, (259), 83 states have call successors, (83), 32 states have call predecessors, (83), 34 states have return successors, (99), 78 states have call predecessors, (99), 81 states have call successors, (99) [2021-12-06 23:08:30,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 441 transitions. [2021-12-06 23:08:30,946 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 441 transitions. Word has length 149 [2021-12-06 23:08:30,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:08:30,947 INFO L470 AbstractCegarLoop]: Abstraction has 356 states and 441 transitions. [2021-12-06 23:08:30,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.315789473684211) internal successors, (120), 17 states have internal predecessors, (120), 4 states have call successors, (33), 5 states have call predecessors, (33), 6 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) [2021-12-06 23:08:30,947 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 441 transitions. [2021-12-06 23:08:30,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-12-06 23:08:30,948 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:08:30,948 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 7, 7, 7, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:08:30,970 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0adc387-e7df-4069-9c09-29814be0ed52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-12-06 23:08:31,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0adc387-e7df-4069-9c09-29814be0ed52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-06 23:08:31,148 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:08:31,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:08:31,149 INFO L85 PathProgramCache]: Analyzing trace with hash -1095383274, now seen corresponding path program 1 times [2021-12-06 23:08:31,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:08:31,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477843439] [2021-12-06 23:08:31,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:08:31,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:08:31,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:31,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 23:08:31,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:31,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 23:08:31,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:31,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 23:08:31,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:31,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 23:08:31,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:31,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 23:08:31,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:31,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-06 23:08:31,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:31,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-06 23:08:31,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:31,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-06 23:08:31,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:31,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:08:31,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:31,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 23:08:31,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:31,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 23:08:31,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:31,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 23:08:31,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:31,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 23:08:31,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:31,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-06 23:08:31,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:31,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-06 23:08:31,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:31,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-12-06 23:08:31,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:31,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-06 23:08:31,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:31,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-06 23:08:31,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:31,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-06 23:08:31,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:31,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-12-06 23:08:31,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:31,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-12-06 23:08:31,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:31,337 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 278 trivial. 0 not checked. [2021-12-06 23:08:31,338 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:08:31,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477843439] [2021-12-06 23:08:31,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477843439] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:08:31,338 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:08:31,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 23:08:31,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508322911] [2021-12-06 23:08:31,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:08:31,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 23:08:31,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:08:31,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 23:08:31,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 23:08:31,339 INFO L87 Difference]: Start difference. First operand 356 states and 441 transitions. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 5 states have internal predecessors, (49), 3 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) [2021-12-06 23:08:31,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:08:31,554 INFO L93 Difference]: Finished difference Result 414 states and 515 transitions. [2021-12-06 23:08:31,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 23:08:31,554 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 5 states have internal predecessors, (49), 3 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) Word has length 155 [2021-12-06 23:08:31,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:08:31,556 INFO L225 Difference]: With dead ends: 414 [2021-12-06 23:08:31,556 INFO L226 Difference]: Without dead ends: 356 [2021-12-06 23:08:31,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-12-06 23:08:31,557 INFO L933 BasicCegarLoop]: 136 mSDtfsCounter, 51 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 23:08:31,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 450 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 23:08:31,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2021-12-06 23:08:31,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 356. [2021-12-06 23:08:31,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 238 states have (on average 1.088235294117647) internal successors, (259), 245 states have internal predecessors, (259), 83 states have call successors, (83), 32 states have call predecessors, (83), 34 states have return successors, (97), 78 states have call predecessors, (97), 81 states have call successors, (97) [2021-12-06 23:08:31,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 439 transitions. [2021-12-06 23:08:31,577 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 439 transitions. Word has length 155 [2021-12-06 23:08:31,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:08:31,577 INFO L470 AbstractCegarLoop]: Abstraction has 356 states and 439 transitions. [2021-12-06 23:08:31,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 5 states have internal predecessors, (49), 3 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) [2021-12-06 23:08:31,577 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 439 transitions. [2021-12-06 23:08:31,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-12-06 23:08:31,578 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:08:31,578 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:08:31,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-06 23:08:31,579 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:08:31,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:08:31,579 INFO L85 PathProgramCache]: Analyzing trace with hash -38056338, now seen corresponding path program 1 times [2021-12-06 23:08:31,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:08:31,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404615691] [2021-12-06 23:08:31,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:08:31,579 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:08:31,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:31,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 23:08:31,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:31,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 23:08:31,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:31,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 23:08:31,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:31,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 23:08:31,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:31,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 23:08:31,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:31,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-06 23:08:31,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:31,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-06 23:08:31,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:31,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-06 23:08:31,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:31,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:08:31,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:31,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 23:08:31,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:31,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 23:08:31,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:31,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 23:08:31,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:31,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 23:08:31,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:31,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-06 23:08:31,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:31,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-06 23:08:31,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:31,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-12-06 23:08:31,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:31,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-06 23:08:31,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:31,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-06 23:08:31,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:31,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2021-12-06 23:08:31,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:31,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-12-06 23:08:31,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:31,886 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2021-12-06 23:08:31,886 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:08:31,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404615691] [2021-12-06 23:08:31,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404615691] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:08:31,886 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:08:31,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-06 23:08:31,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527056893] [2021-12-06 23:08:31,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:08:31,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 23:08:31,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:08:31,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 23:08:31,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-06 23:08:31,887 INFO L87 Difference]: Start difference. First operand 356 states and 439 transitions. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 8 states have internal predecessors, (56), 4 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (20), 5 states have call predecessors, (20), 4 states have call successors, (20) [2021-12-06 23:08:32,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:08:32,449 INFO L93 Difference]: Finished difference Result 459 states and 588 transitions. [2021-12-06 23:08:32,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 23:08:32,449 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 8 states have internal predecessors, (56), 4 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (20), 5 states have call predecessors, (20), 4 states have call successors, (20) Word has length 156 [2021-12-06 23:08:32,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:08:32,451 INFO L225 Difference]: With dead ends: 459 [2021-12-06 23:08:32,451 INFO L226 Difference]: Without dead ends: 371 [2021-12-06 23:08:32,452 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-12-06 23:08:32,452 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 53 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 851 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 589 SdHoareTripleChecker+Invalid, 923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 851 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 23:08:32,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 589 Invalid, 923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 851 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 23:08:32,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2021-12-06 23:08:32,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 350. [2021-12-06 23:08:32,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 234 states have (on average 1.0726495726495726) internal successors, (251), 241 states have internal predecessors, (251), 81 states have call successors, (81), 32 states have call predecessors, (81), 34 states have return successors, (95), 76 states have call predecessors, (95), 79 states have call successors, (95) [2021-12-06 23:08:32,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 427 transitions. [2021-12-06 23:08:32,473 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 427 transitions. Word has length 156 [2021-12-06 23:08:32,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:08:32,473 INFO L470 AbstractCegarLoop]: Abstraction has 350 states and 427 transitions. [2021-12-06 23:08:32,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 8 states have internal predecessors, (56), 4 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (20), 5 states have call predecessors, (20), 4 states have call successors, (20) [2021-12-06 23:08:32,473 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 427 transitions. [2021-12-06 23:08:32,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-06 23:08:32,474 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:08:32,475 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:08:32,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-06 23:08:32,475 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:08:32,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:08:32,475 INFO L85 PathProgramCache]: Analyzing trace with hash -23336005, now seen corresponding path program 1 times [2021-12-06 23:08:32,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:08:32,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617132672] [2021-12-06 23:08:32,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:08:32,475 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:08:32,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:32,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 23:08:32,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:32,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 23:08:32,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:32,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 23:08:32,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:32,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 23:08:32,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:32,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 23:08:32,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:32,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-06 23:08:32,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:32,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-06 23:08:32,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:32,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-06 23:08:32,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:32,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:08:32,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:32,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 23:08:32,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:32,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 23:08:32,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:32,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 23:08:32,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:32,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 23:08:32,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:32,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-06 23:08:32,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:32,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-06 23:08:32,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:32,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-12-06 23:08:32,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:32,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-06 23:08:32,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:32,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-06 23:08:32,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:32,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-06 23:08:32,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:32,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-12-06 23:08:32,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:32,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-12-06 23:08:32,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:32,694 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2021-12-06 23:08:32,695 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:08:32,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617132672] [2021-12-06 23:08:32,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617132672] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:08:32,695 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:08:32,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-06 23:08:32,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630706864] [2021-12-06 23:08:32,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:08:32,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 23:08:32,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:08:32,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 23:08:32,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-06 23:08:32,696 INFO L87 Difference]: Start difference. First operand 350 states and 427 transitions. Second operand has 9 states, 8 states have (on average 6.125) internal successors, (49), 6 states have internal predecessors, (49), 2 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) [2021-12-06 23:08:32,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:08:32,979 INFO L93 Difference]: Finished difference Result 360 states and 438 transitions. [2021-12-06 23:08:32,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 23:08:32,979 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.125) internal successors, (49), 6 states have internal predecessors, (49), 2 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) Word has length 157 [2021-12-06 23:08:32,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:08:32,981 INFO L225 Difference]: With dead ends: 360 [2021-12-06 23:08:32,981 INFO L226 Difference]: Without dead ends: 358 [2021-12-06 23:08:32,981 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-12-06 23:08:32,982 INFO L933 BasicCegarLoop]: 142 mSDtfsCounter, 50 mSDsluCounter, 713 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 855 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 23:08:32,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 855 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 23:08:32,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-12-06 23:08:33,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 356. [2021-12-06 23:08:33,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 237 states have (on average 1.0717299578059072) internal successors, (254), 244 states have internal predecessors, (254), 83 states have call successors, (83), 33 states have call predecessors, (83), 35 states have return successors, (97), 78 states have call predecessors, (97), 81 states have call successors, (97) [2021-12-06 23:08:33,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 434 transitions. [2021-12-06 23:08:33,002 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 434 transitions. Word has length 157 [2021-12-06 23:08:33,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:08:33,002 INFO L470 AbstractCegarLoop]: Abstraction has 356 states and 434 transitions. [2021-12-06 23:08:33,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.125) internal successors, (49), 6 states have internal predecessors, (49), 2 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) [2021-12-06 23:08:33,002 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 434 transitions. [2021-12-06 23:08:33,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-12-06 23:08:33,003 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:08:33,003 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:08:33,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-12-06 23:08:33,004 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:08:33,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:08:33,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1886376426, now seen corresponding path program 1 times [2021-12-06 23:08:33,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:08:33,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268029048] [2021-12-06 23:08:33,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:08:33,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:08:33,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:33,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 23:08:33,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:33,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 23:08:33,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:33,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 23:08:33,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:33,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:08:33,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:33,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 23:08:33,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:33,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-06 23:08:33,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:33,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-06 23:08:33,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:33,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-06 23:08:33,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:33,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-06 23:08:33,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:33,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-06 23:08:33,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:33,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-06 23:08:33,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:33,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-06 23:08:33,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:33,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-12-06 23:08:33,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:33,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-12-06 23:08:33,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:33,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-06 23:08:33,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:33,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-12-06 23:08:33,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:33,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-12-06 23:08:33,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:33,880 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2021-12-06 23:08:33,880 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:08:33,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268029048] [2021-12-06 23:08:33,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268029048] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:08:33,880 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:08:33,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-06 23:08:33,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622771100] [2021-12-06 23:08:33,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:08:33,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-06 23:08:33,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:08:33,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-06 23:08:33,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-12-06 23:08:33,882 INFO L87 Difference]: Start difference. First operand 356 states and 434 transitions. Second operand has 20 states, 20 states have (on average 3.1) internal successors, (62), 17 states have internal predecessors, (62), 9 states have call successors, (19), 4 states have call predecessors, (19), 3 states have return successors, (17), 10 states have call predecessors, (17), 8 states have call successors, (17) [2021-12-06 23:08:35,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:08:35,114 INFO L93 Difference]: Finished difference Result 524 states and 693 transitions. [2021-12-06 23:08:35,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-06 23:08:35,115 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 17 states have internal predecessors, (62), 9 states have call successors, (19), 4 states have call predecessors, (19), 3 states have return successors, (17), 10 states have call predecessors, (17), 8 states have call successors, (17) Word has length 155 [2021-12-06 23:08:35,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:08:35,117 INFO L225 Difference]: With dead ends: 524 [2021-12-06 23:08:35,117 INFO L226 Difference]: Without dead ends: 439 [2021-12-06 23:08:35,118 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=918, Unknown=0, NotChecked=0, Total=1056 [2021-12-06 23:08:35,118 INFO L933 BasicCegarLoop]: 172 mSDtfsCounter, 123 mSDsluCounter, 1151 mSDsCounter, 0 mSdLazyCounter, 2734 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 1323 SdHoareTripleChecker+Invalid, 2841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 2734 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:08:35,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 1323 Invalid, 2841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 2734 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-06 23:08:35,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-12-06 23:08:35,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 399. [2021-12-06 23:08:35,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 260 states have (on average 1.073076923076923) internal successors, (279), 269 states have internal predecessors, (279), 101 states have call successors, (101), 34 states have call predecessors, (101), 37 states have return successors, (128), 95 states have call predecessors, (128), 99 states have call successors, (128) [2021-12-06 23:08:35,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 508 transitions. [2021-12-06 23:08:35,144 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 508 transitions. Word has length 155 [2021-12-06 23:08:35,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:08:35,145 INFO L470 AbstractCegarLoop]: Abstraction has 399 states and 508 transitions. [2021-12-06 23:08:35,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 17 states have internal predecessors, (62), 9 states have call successors, (19), 4 states have call predecessors, (19), 3 states have return successors, (17), 10 states have call predecessors, (17), 8 states have call successors, (17) [2021-12-06 23:08:35,145 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 508 transitions. [2021-12-06 23:08:35,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-06 23:08:35,146 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:08:35,146 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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] [2021-12-06 23:08:35,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-12-06 23:08:35,146 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:08:35,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:08:35,147 INFO L85 PathProgramCache]: Analyzing trace with hash -1849535011, now seen corresponding path program 1 times [2021-12-06 23:08:35,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:08:35,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414098855] [2021-12-06 23:08:35,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:08:35,147 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:08:35,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:35,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 23:08:35,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:35,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 23:08:35,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:35,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 23:08:35,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:35,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:08:35,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:35,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 23:08:35,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:35,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-06 23:08:35,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:35,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-06 23:08:35,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:35,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-06 23:08:35,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:35,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-06 23:08:35,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:35,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-06 23:08:35,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:35,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-06 23:08:35,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:35,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-06 23:08:35,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:35,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-12-06 23:08:35,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:35,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-12-06 23:08:35,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:35,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-06 23:08:35,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:35,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-12-06 23:08:35,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:35,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-12-06 23:08:35,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:35,403 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2021-12-06 23:08:35,403 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:08:35,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414098855] [2021-12-06 23:08:35,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414098855] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:08:35,404 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:08:35,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-06 23:08:35,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034584529] [2021-12-06 23:08:35,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:08:35,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-06 23:08:35,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:08:35,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-06 23:08:35,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-12-06 23:08:35,405 INFO L87 Difference]: Start difference. First operand 399 states and 508 transitions. Second operand has 14 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 11 states have internal predecessors, (61), 2 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 1 states have call successors, (17) [2021-12-06 23:08:35,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:08:35,822 INFO L93 Difference]: Finished difference Result 405 states and 513 transitions. [2021-12-06 23:08:35,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-06 23:08:35,822 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 11 states have internal predecessors, (61), 2 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 1 states have call successors, (17) Word has length 157 [2021-12-06 23:08:35,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:08:35,824 INFO L225 Difference]: With dead ends: 405 [2021-12-06 23:08:35,824 INFO L226 Difference]: Without dead ends: 403 [2021-12-06 23:08:35,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2021-12-06 23:08:35,825 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 75 mSDsluCounter, 1249 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 1402 SdHoareTripleChecker+Invalid, 602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 23:08:35,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 1402 Invalid, 602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 545 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 23:08:35,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2021-12-06 23:08:35,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 403. [2021-12-06 23:08:35,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 263 states have (on average 1.0722433460076046) internal successors, (282), 272 states have internal predecessors, (282), 101 states have call successors, (101), 35 states have call predecessors, (101), 38 states have return successors, (128), 95 states have call predecessors, (128), 99 states have call successors, (128) [2021-12-06 23:08:35,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 511 transitions. [2021-12-06 23:08:35,850 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 511 transitions. Word has length 157 [2021-12-06 23:08:35,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:08:35,850 INFO L470 AbstractCegarLoop]: Abstraction has 403 states and 511 transitions. [2021-12-06 23:08:35,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 11 states have internal predecessors, (61), 2 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 1 states have call successors, (17) [2021-12-06 23:08:35,850 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 511 transitions. [2021-12-06 23:08:35,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-12-06 23:08:35,851 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:08:35,851 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 7, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:08:35,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-12-06 23:08:35,852 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:08:35,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:08:35,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1181812483, now seen corresponding path program 1 times [2021-12-06 23:08:35,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:08:35,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579571878] [2021-12-06 23:08:35,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:08:35,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:08:35,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:35,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 23:08:35,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:35,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 23:08:35,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:35,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 23:08:35,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:35,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 23:08:35,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:35,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 23:08:35,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:35,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-06 23:08:35,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:35,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-06 23:08:35,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:35,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-06 23:08:36,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:36,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:08:36,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:36,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 23:08:36,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:36,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 23:08:36,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:36,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 23:08:36,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:36,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 23:08:36,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:36,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-06 23:08:36,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:36,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-06 23:08:36,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:36,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-12-06 23:08:36,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:36,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-06 23:08:36,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:36,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-06 23:08:36,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:36,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-06 23:08:36,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:36,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-12-06 23:08:36,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:36,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-12-06 23:08:36,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:36,162 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 278 trivial. 0 not checked. [2021-12-06 23:08:36,162 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:08:36,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579571878] [2021-12-06 23:08:36,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579571878] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:08:36,163 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:08:36,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-06 23:08:36,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038732481] [2021-12-06 23:08:36,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:08:36,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-06 23:08:36,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:08:36,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-06 23:08:36,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-12-06 23:08:36,164 INFO L87 Difference]: Start difference. First operand 403 states and 511 transitions. Second operand has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 11 states have internal predecessors, (55), 5 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (21), 6 states have call predecessors, (21), 4 states have call successors, (21) [2021-12-06 23:08:36,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:08:36,845 INFO L93 Difference]: Finished difference Result 486 states and 633 transitions. [2021-12-06 23:08:36,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-06 23:08:36,846 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 11 states have internal predecessors, (55), 5 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (21), 6 states have call predecessors, (21), 4 states have call successors, (21) Word has length 161 [2021-12-06 23:08:36,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:08:36,848 INFO L225 Difference]: With dead ends: 486 [2021-12-06 23:08:36,848 INFO L226 Difference]: Without dead ends: 423 [2021-12-06 23:08:36,848 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-12-06 23:08:36,849 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 95 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 1042 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 1110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1042 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 23:08:36,849 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 551 Invalid, 1110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1042 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 23:08:36,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2021-12-06 23:08:36,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 405. [2021-12-06 23:08:36,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 264 states have (on average 1.071969696969697) internal successors, (283), 273 states have internal predecessors, (283), 102 states have call successors, (102), 35 states have call predecessors, (102), 38 states have return successors, (127), 96 states have call predecessors, (127), 100 states have call successors, (127) [2021-12-06 23:08:36,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 512 transitions. [2021-12-06 23:08:36,875 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 512 transitions. Word has length 161 [2021-12-06 23:08:36,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:08:36,875 INFO L470 AbstractCegarLoop]: Abstraction has 405 states and 512 transitions. [2021-12-06 23:08:36,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 11 states have internal predecessors, (55), 5 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (21), 6 states have call predecessors, (21), 4 states have call successors, (21) [2021-12-06 23:08:36,875 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 512 transitions. [2021-12-06 23:08:36,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-12-06 23:08:36,876 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:08:36,877 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 8, 8, 8, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:08:36,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-12-06 23:08:36,877 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:08:36,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:08:36,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1756330511, now seen corresponding path program 1 times [2021-12-06 23:08:36,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:08:36,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134762561] [2021-12-06 23:08:36,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:08:36,878 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:08:36,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:36,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 23:08:36,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:36,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 23:08:36,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:36,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 23:08:36,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:36,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 23:08:36,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:36,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 23:08:36,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:36,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-06 23:08:36,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:36,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-06 23:08:37,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:37,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-06 23:08:37,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:37,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:08:37,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:37,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 23:08:37,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:37,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 23:08:37,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:37,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 23:08:37,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:37,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 23:08:37,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:37,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-06 23:08:37,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:37,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-06 23:08:37,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:37,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-12-06 23:08:37,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:37,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-06 23:08:37,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:37,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-06 23:08:37,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:37,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-06 23:08:37,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:37,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-12-06 23:08:37,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:37,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-12-06 23:08:37,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:37,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-06 23:08:37,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:37,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2021-12-06 23:08:37,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:37,091 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 356 trivial. 0 not checked. [2021-12-06 23:08:37,091 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:08:37,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134762561] [2021-12-06 23:08:37,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134762561] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:08:37,091 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:08:37,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-06 23:08:37,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453685554] [2021-12-06 23:08:37,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:08:37,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 23:08:37,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:08:37,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 23:08:37,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-06 23:08:37,092 INFO L87 Difference]: Start difference. First operand 405 states and 512 transitions. Second operand has 9 states, 8 states have (on average 6.375) internal successors, (51), 6 states have internal predecessors, (51), 2 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (23), 2 states have call predecessors, (23), 1 states have call successors, (23) [2021-12-06 23:08:37,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:08:37,372 INFO L93 Difference]: Finished difference Result 413 states and 520 transitions. [2021-12-06 23:08:37,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 23:08:37,373 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.375) internal successors, (51), 6 states have internal predecessors, (51), 2 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (23), 2 states have call predecessors, (23), 1 states have call successors, (23) Word has length 172 [2021-12-06 23:08:37,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:08:37,375 INFO L225 Difference]: With dead ends: 413 [2021-12-06 23:08:37,375 INFO L226 Difference]: Without dead ends: 411 [2021-12-06 23:08:37,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-12-06 23:08:37,375 INFO L933 BasicCegarLoop]: 142 mSDtfsCounter, 50 mSDsluCounter, 713 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 855 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 23:08:37,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 855 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 23:08:37,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2021-12-06 23:08:37,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 410. [2021-12-06 23:08:37,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 267 states have (on average 1.0711610486891385) internal successors, (286), 276 states have internal predecessors, (286), 103 states have call successors, (103), 36 states have call predecessors, (103), 39 states have return successors, (128), 97 states have call predecessors, (128), 101 states have call successors, (128) [2021-12-06 23:08:37,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 517 transitions. [2021-12-06 23:08:37,407 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 517 transitions. Word has length 172 [2021-12-06 23:08:37,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:08:37,408 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 517 transitions. [2021-12-06 23:08:37,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.375) internal successors, (51), 6 states have internal predecessors, (51), 2 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (23), 2 states have call predecessors, (23), 1 states have call successors, (23) [2021-12-06 23:08:37,408 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 517 transitions. [2021-12-06 23:08:37,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-12-06 23:08:37,409 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:08:37,409 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 8, 8, 8, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:08:37,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-12-06 23:08:37,410 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:08:37,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:08:37,410 INFO L85 PathProgramCache]: Analyzing trace with hash -695136181, now seen corresponding path program 1 times [2021-12-06 23:08:37,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:08:37,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411583509] [2021-12-06 23:08:37,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:08:37,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:08:37,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:37,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 23:08:37,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:37,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 23:08:37,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:37,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 23:08:37,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:37,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 23:08:37,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:37,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 23:08:37,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:37,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-06 23:08:37,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:37,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-06 23:08:37,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:37,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-06 23:08:37,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:37,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:08:37,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:37,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 23:08:37,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:37,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 23:08:37,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:37,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 23:08:37,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:37,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 23:08:37,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:37,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-06 23:08:37,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:37,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-06 23:08:37,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:37,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-12-06 23:08:37,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:37,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-06 23:08:37,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:37,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-06 23:08:37,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:37,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-06 23:08:37,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:37,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-12-06 23:08:37,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:37,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-12-06 23:08:37,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:37,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-06 23:08:37,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:37,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2021-12-06 23:08:37,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:37,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2021-12-06 23:08:37,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:37,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2021-12-06 23:08:37,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:37,616 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 413 trivial. 0 not checked. [2021-12-06 23:08:37,616 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:08:37,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411583509] [2021-12-06 23:08:37,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411583509] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:08:37,616 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:08:37,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 23:08:37,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451799199] [2021-12-06 23:08:37,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:08:37,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 23:08:37,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:08:37,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 23:08:37,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 23:08:37,617 INFO L87 Difference]: Start difference. First operand 410 states and 517 transitions. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 5 states have internal predecessors, (52), 3 states have call successors, (26), 3 states have call predecessors, (26), 2 states have return successors, (25), 3 states have call predecessors, (25), 2 states have call successors, (25) [2021-12-06 23:08:37,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:08:37,839 INFO L93 Difference]: Finished difference Result 455 states and 571 transitions. [2021-12-06 23:08:37,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 23:08:37,840 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 5 states have internal predecessors, (52), 3 states have call successors, (26), 3 states have call predecessors, (26), 2 states have return successors, (25), 3 states have call predecessors, (25), 2 states have call successors, (25) Word has length 184 [2021-12-06 23:08:37,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:08:37,842 INFO L225 Difference]: With dead ends: 455 [2021-12-06 23:08:37,842 INFO L226 Difference]: Without dead ends: 410 [2021-12-06 23:08:37,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-12-06 23:08:37,843 INFO L933 BasicCegarLoop]: 139 mSDtfsCounter, 51 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 23:08:37,843 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 448 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 23:08:37,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-12-06 23:08:37,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 410. [2021-12-06 23:08:37,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 267 states have (on average 1.0711610486891385) internal successors, (286), 276 states have internal predecessors, (286), 103 states have call successors, (103), 36 states have call predecessors, (103), 39 states have return successors, (127), 97 states have call predecessors, (127), 101 states have call successors, (127) [2021-12-06 23:08:37,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 516 transitions. [2021-12-06 23:08:37,869 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 516 transitions. Word has length 184 [2021-12-06 23:08:37,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:08:37,869 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 516 transitions. [2021-12-06 23:08:37,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 5 states have internal predecessors, (52), 3 states have call successors, (26), 3 states have call predecessors, (26), 2 states have return successors, (25), 3 states have call predecessors, (25), 2 states have call successors, (25) [2021-12-06 23:08:37,870 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 516 transitions. [2021-12-06 23:08:37,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-12-06 23:08:37,871 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:08:37,871 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 8, 8, 8, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:08:37,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-12-06 23:08:37,871 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:08:37,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:08:37,872 INFO L85 PathProgramCache]: Analyzing trace with hash -664437840, now seen corresponding path program 1 times [2021-12-06 23:08:37,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:08:37,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459096563] [2021-12-06 23:08:37,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:08:37,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:08:37,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:37,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 23:08:37,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:37,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 23:08:37,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:37,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 23:08:37,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:37,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 23:08:37,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:37,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 23:08:37,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:37,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-06 23:08:37,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:37,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-06 23:08:37,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:37,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-06 23:08:38,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:38,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:08:38,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:38,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 23:08:38,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:38,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 23:08:38,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:38,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 23:08:38,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:38,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 23:08:38,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:38,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-06 23:08:38,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:38,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-06 23:08:38,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:38,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-12-06 23:08:38,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:38,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-06 23:08:38,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:38,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-06 23:08:38,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:38,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-06 23:08:38,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:38,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-12-06 23:08:38,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:38,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-12-06 23:08:38,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:38,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-06 23:08:38,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:38,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2021-12-06 23:08:38,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:38,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2021-12-06 23:08:38,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:38,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2021-12-06 23:08:38,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:38,083 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 431 trivial. 0 not checked. [2021-12-06 23:08:38,083 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:08:38,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459096563] [2021-12-06 23:08:38,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459096563] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:08:38,083 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:08:38,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-06 23:08:38,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241896654] [2021-12-06 23:08:38,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:08:38,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 23:08:38,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:08:38,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 23:08:38,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-06 23:08:38,084 INFO L87 Difference]: Start difference. First operand 410 states and 516 transitions. Second operand has 9 states, 8 states have (on average 6.5) internal successors, (52), 6 states have internal predecessors, (52), 2 states have call successors, (26), 3 states have call predecessors, (26), 2 states have return successors, (25), 2 states have call predecessors, (25), 1 states have call successors, (25) [2021-12-06 23:08:38,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:08:38,340 INFO L93 Difference]: Finished difference Result 418 states and 524 transitions. [2021-12-06 23:08:38,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 23:08:38,341 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.5) internal successors, (52), 6 states have internal predecessors, (52), 2 states have call successors, (26), 3 states have call predecessors, (26), 2 states have return successors, (25), 2 states have call predecessors, (25), 1 states have call successors, (25) Word has length 186 [2021-12-06 23:08:38,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:08:38,343 INFO L225 Difference]: With dead ends: 418 [2021-12-06 23:08:38,343 INFO L226 Difference]: Without dead ends: 416 [2021-12-06 23:08:38,343 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-12-06 23:08:38,343 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 50 mSDsluCounter, 707 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 848 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 23:08:38,344 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 848 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 23:08:38,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2021-12-06 23:08:38,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 415. [2021-12-06 23:08:38,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 270 states have (on average 1.0703703703703704) internal successors, (289), 279 states have internal predecessors, (289), 104 states have call successors, (104), 37 states have call predecessors, (104), 40 states have return successors, (128), 98 states have call predecessors, (128), 102 states have call successors, (128) [2021-12-06 23:08:38,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 521 transitions. [2021-12-06 23:08:38,368 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 521 transitions. Word has length 186 [2021-12-06 23:08:38,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:08:38,369 INFO L470 AbstractCegarLoop]: Abstraction has 415 states and 521 transitions. [2021-12-06 23:08:38,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.5) internal successors, (52), 6 states have internal predecessors, (52), 2 states have call successors, (26), 3 states have call predecessors, (26), 2 states have return successors, (25), 2 states have call predecessors, (25), 1 states have call successors, (25) [2021-12-06 23:08:38,369 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 521 transitions. [2021-12-06 23:08:38,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-06 23:08:38,370 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:08:38,370 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 9, 8, 8, 8, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:08:38,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-12-06 23:08:38,371 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:08:38,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:08:38,371 INFO L85 PathProgramCache]: Analyzing trace with hash 530519160, now seen corresponding path program 1 times [2021-12-06 23:08:38,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:08:38,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254084708] [2021-12-06 23:08:38,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:08:38,371 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:08:38,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:38,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 23:08:38,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:38,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 23:08:38,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:38,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 23:08:38,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:38,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 23:08:38,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:38,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 23:08:38,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:38,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-06 23:08:38,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:38,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-06 23:08:38,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:38,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-06 23:08:38,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:38,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:08:38,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:38,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 23:08:38,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:38,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 23:08:38,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:38,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 23:08:38,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:38,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 23:08:38,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:38,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-06 23:08:38,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:38,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-06 23:08:38,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:38,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-12-06 23:08:38,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:38,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-06 23:08:38,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:38,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-06 23:08:38,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:38,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-06 23:08:38,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:38,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-12-06 23:08:38,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:38,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-12-06 23:08:38,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:38,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-06 23:08:38,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:38,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2021-12-06 23:08:38,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:38,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2021-12-06 23:08:38,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:38,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2021-12-06 23:08:38,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:38,749 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 413 trivial. 0 not checked. [2021-12-06 23:08:38,749 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:08:38,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254084708] [2021-12-06 23:08:38,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254084708] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:08:38,749 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:08:38,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-12-06 23:08:38,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969680390] [2021-12-06 23:08:38,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:08:38,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-06 23:08:38,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:08:38,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-06 23:08:38,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-12-06 23:08:38,750 INFO L87 Difference]: Start difference. First operand 415 states and 521 transitions. Second operand has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 13 states have internal predecessors, (58), 6 states have call successors, (26), 3 states have call predecessors, (26), 3 states have return successors, (25), 7 states have call predecessors, (25), 5 states have call successors, (25) [2021-12-06 23:08:39,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:08:39,536 INFO L93 Difference]: Finished difference Result 479 states and 612 transitions. [2021-12-06 23:08:39,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 23:08:39,536 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 13 states have internal predecessors, (58), 6 states have call successors, (26), 3 states have call predecessors, (26), 3 states have return successors, (25), 7 states have call predecessors, (25), 5 states have call successors, (25) Word has length 190 [2021-12-06 23:08:39,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:08:39,539 INFO L225 Difference]: With dead ends: 479 [2021-12-06 23:08:39,539 INFO L226 Difference]: Without dead ends: 434 [2021-12-06 23:08:39,540 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-12-06 23:08:39,540 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 90 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 1268 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 683 SdHoareTripleChecker+Invalid, 1354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 23:08:39,541 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 683 Invalid, 1354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1268 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-06 23:08:39,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2021-12-06 23:08:39,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 423. [2021-12-06 23:08:39,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 273 states have (on average 1.0695970695970696) internal successors, (292), 282 states have internal predecessors, (292), 109 states have call successors, (109), 37 states have call predecessors, (109), 40 states have return successors, (134), 103 states have call predecessors, (134), 107 states have call successors, (134) [2021-12-06 23:08:39,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 535 transitions. [2021-12-06 23:08:39,568 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 535 transitions. Word has length 190 [2021-12-06 23:08:39,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:08:39,568 INFO L470 AbstractCegarLoop]: Abstraction has 423 states and 535 transitions. [2021-12-06 23:08:39,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 13 states have internal predecessors, (58), 6 states have call successors, (26), 3 states have call predecessors, (26), 3 states have return successors, (25), 7 states have call predecessors, (25), 5 states have call successors, (25) [2021-12-06 23:08:39,568 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 535 transitions. [2021-12-06 23:08:39,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-12-06 23:08:39,570 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:08:39,570 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 7, 7, 7, 7, 7, 5, 5, 5, 5, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:08:39,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-12-06 23:08:39,570 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:08:39,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:08:39,570 INFO L85 PathProgramCache]: Analyzing trace with hash 264659881, now seen corresponding path program 1 times [2021-12-06 23:08:39,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:08:39,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871086426] [2021-12-06 23:08:39,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:08:39,571 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:08:39,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:39,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 23:08:39,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:39,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 23:08:39,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:39,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 23:08:39,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:39,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:08:39,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:39,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 23:08:39,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:39,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-06 23:08:39,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:39,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-06 23:08:39,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:39,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-06 23:08:39,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:39,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-06 23:08:39,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:39,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-06 23:08:39,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:39,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-06 23:08:39,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:39,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:08:39,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:39,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 23:08:39,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:39,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-06 23:08:39,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:39,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-06 23:08:39,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:39,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-06 23:08:39,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:39,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-06 23:08:39,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:39,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-06 23:08:39,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:39,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-06 23:08:39,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:39,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2021-12-06 23:08:39,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:39,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-06 23:08:39,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:39,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2021-12-06 23:08:39,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:39,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2021-12-06 23:08:39,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:39,892 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 28 proven. 12 refuted. 0 times theorem prover too weak. 347 trivial. 0 not checked. [2021-12-06 23:08:39,892 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:08:39,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871086426] [2021-12-06 23:08:39,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871086426] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:08:39,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000751454] [2021-12-06 23:08:39,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:08:39,892 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:08:39,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0adc387-e7df-4069-9c09-29814be0ed52/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:08:39,893 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0adc387-e7df-4069-9c09-29814be0ed52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:08:39,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0adc387-e7df-4069-9c09-29814be0ed52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-06 23:08:40,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:40,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 2959 conjuncts, 76 conjunts are in the unsatisfiable core [2021-12-06 23:08:40,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:08:40,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 23:08:40,557 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-06 23:08:40,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-06 23:08:40,817 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 23:08:40,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-06 23:08:40,845 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 17 treesize of output 19 [2021-12-06 23:08:42,947 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 17 treesize of output 19 [2021-12-06 23:08:49,706 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 190 proven. 147 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-12-06 23:08:49,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:08:49,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000751454] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:08:49,862 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 23:08:49,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 24] total 29 [2021-12-06 23:08:49,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068496140] [2021-12-06 23:08:49,862 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 23:08:49,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-06 23:08:49,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:08:49,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-06 23:08:49,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=780, Unknown=1, NotChecked=0, Total=870 [2021-12-06 23:08:49,864 INFO L87 Difference]: Start difference. First operand 423 states and 535 transitions. Second operand has 29 states, 29 states have (on average 5.137931034482759) internal successors, (149), 25 states have internal predecessors, (149), 12 states have call successors, (47), 10 states have call predecessors, (47), 10 states have return successors, (46), 12 states have call predecessors, (46), 12 states have call successors, (46) [2021-12-06 23:08:52,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:08:52,800 INFO L93 Difference]: Finished difference Result 609 states and 778 transitions. [2021-12-06 23:08:52,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-06 23:08:52,801 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.137931034482759) internal successors, (149), 25 states have internal predecessors, (149), 12 states have call successors, (47), 10 states have call predecessors, (47), 10 states have return successors, (46), 12 states have call predecessors, (46), 12 states have call successors, (46) Word has length 195 [2021-12-06 23:08:52,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:08:52,803 INFO L225 Difference]: With dead ends: 609 [2021-12-06 23:08:52,803 INFO L226 Difference]: Without dead ends: 422 [2021-12-06 23:08:52,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 247 SyntacticMatches, 19 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 668 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=215, Invalid=1853, Unknown=2, NotChecked=0, Total=2070 [2021-12-06 23:08:52,805 INFO L933 BasicCegarLoop]: 151 mSDtfsCounter, 181 mSDsluCounter, 765 mSDsCounter, 0 mSdLazyCounter, 1001 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 916 SdHoareTripleChecker+Invalid, 1993 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 1001 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 796 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 23:08:52,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 916 Invalid, 1993 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 1001 Invalid, 0 Unknown, 796 Unchecked, 0.5s Time] [2021-12-06 23:08:52,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2021-12-06 23:08:52,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 395. [2021-12-06 23:08:52,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 263 states have (on average 1.079847908745247) internal successors, (284), 272 states have internal predecessors, (284), 91 states have call successors, (91), 36 states have call predecessors, (91), 40 states have return successors, (114), 86 states have call predecessors, (114), 89 states have call successors, (114) [2021-12-06 23:08:52,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 489 transitions. [2021-12-06 23:08:52,830 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 489 transitions. Word has length 195 [2021-12-06 23:08:52,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:08:52,830 INFO L470 AbstractCegarLoop]: Abstraction has 395 states and 489 transitions. [2021-12-06 23:08:52,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 5.137931034482759) internal successors, (149), 25 states have internal predecessors, (149), 12 states have call successors, (47), 10 states have call predecessors, (47), 10 states have return successors, (46), 12 states have call predecessors, (46), 12 states have call successors, (46) [2021-12-06 23:08:52,830 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 489 transitions. [2021-12-06 23:08:52,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-12-06 23:08:52,832 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:08:52,832 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 8, 8, 8, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:08:52,854 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0adc387-e7df-4069-9c09-29814be0ed52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-12-06 23:08:53,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0adc387-e7df-4069-9c09-29814be0ed52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-12-06 23:08:53,033 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:08:53,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:08:53,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1110193572, now seen corresponding path program 1 times [2021-12-06 23:08:53,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:08:53,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396811319] [2021-12-06 23:08:53,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:08:53,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:08:53,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:53,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 23:08:53,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:53,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 23:08:53,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:53,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 23:08:53,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:53,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 23:08:53,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:53,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 23:08:53,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:53,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-06 23:08:53,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:53,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-06 23:08:53,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:53,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-06 23:08:53,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:53,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:08:53,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:53,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 23:08:53,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:53,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 23:08:53,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:53,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 23:08:53,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:53,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 23:08:53,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:53,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-06 23:08:53,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:53,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-06 23:08:53,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:53,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-12-06 23:08:53,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:53,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-06 23:08:53,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:53,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-06 23:08:53,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:53,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-06 23:08:53,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:53,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-12-06 23:08:53,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:53,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-12-06 23:08:53,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:53,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-06 23:08:53,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:53,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2021-12-06 23:08:53,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:53,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2021-12-06 23:08:53,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:53,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2021-12-06 23:08:53,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:53,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2021-12-06 23:08:53,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:53,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 189 [2021-12-06 23:08:53,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:53,307 INFO L134 CoverageAnalysis]: Checked inductivity of 569 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 517 trivial. 0 not checked. [2021-12-06 23:08:53,307 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:08:53,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396811319] [2021-12-06 23:08:53,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396811319] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:08:53,307 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:08:53,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-06 23:08:53,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238331747] [2021-12-06 23:08:53,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:08:53,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 23:08:53,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:08:53,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 23:08:53,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-06 23:08:53,308 INFO L87 Difference]: Start difference. First operand 395 states and 489 transitions. Second operand has 9 states, 8 states have (on average 6.75) internal successors, (54), 6 states have internal predecessors, (54), 2 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (27), 2 states have call predecessors, (27), 1 states have call successors, (27) [2021-12-06 23:08:53,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:08:53,594 INFO L93 Difference]: Finished difference Result 403 states and 497 transitions. [2021-12-06 23:08:53,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 23:08:53,594 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.75) internal successors, (54), 6 states have internal predecessors, (54), 2 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (27), 2 states have call predecessors, (27), 1 states have call successors, (27) Word has length 201 [2021-12-06 23:08:53,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:08:53,596 INFO L225 Difference]: With dead ends: 403 [2021-12-06 23:08:53,596 INFO L226 Difference]: Without dead ends: 401 [2021-12-06 23:08:53,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-12-06 23:08:53,597 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 50 mSDsluCounter, 707 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 848 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 23:08:53,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 848 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 23:08:53,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-12-06 23:08:53,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 400. [2021-12-06 23:08:53,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 266 states have (on average 1.0789473684210527) internal successors, (287), 275 states have internal predecessors, (287), 92 states have call successors, (92), 37 states have call predecessors, (92), 41 states have return successors, (115), 87 states have call predecessors, (115), 90 states have call successors, (115) [2021-12-06 23:08:53,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 494 transitions. [2021-12-06 23:08:53,636 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 494 transitions. Word has length 201 [2021-12-06 23:08:53,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:08:53,636 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 494 transitions. [2021-12-06 23:08:53,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.75) internal successors, (54), 6 states have internal predecessors, (54), 2 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (27), 2 states have call predecessors, (27), 1 states have call successors, (27) [2021-12-06 23:08:53,636 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 494 transitions. [2021-12-06 23:08:53,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2021-12-06 23:08:53,637 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:08:53,638 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 10, 8, 8, 8, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:08:53,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-12-06 23:08:53,638 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:08:53,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:08:53,638 INFO L85 PathProgramCache]: Analyzing trace with hash 38923556, now seen corresponding path program 1 times [2021-12-06 23:08:53,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:08:53,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191875839] [2021-12-06 23:08:53,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:08:53,638 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:08:53,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:53,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 23:08:53,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:53,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 23:08:53,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:53,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 23:08:53,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:53,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 23:08:53,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:53,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 23:08:53,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:53,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-06 23:08:53,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:53,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-06 23:08:53,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:53,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-06 23:08:53,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:53,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:08:53,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:53,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 23:08:53,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:53,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 23:08:53,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:53,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 23:08:53,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:53,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 23:08:53,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:53,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-06 23:08:53,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:53,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-06 23:08:53,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:53,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-12-06 23:08:53,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:53,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-06 23:08:53,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:53,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-06 23:08:53,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:53,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-06 23:08:53,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:53,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-12-06 23:08:53,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:53,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-12-06 23:08:53,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:53,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-06 23:08:53,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:53,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2021-12-06 23:08:53,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:53,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2021-12-06 23:08:53,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:53,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2021-12-06 23:08:53,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:53,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2021-12-06 23:08:53,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:53,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 189 [2021-12-06 23:08:53,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:54,038 INFO L134 CoverageAnalysis]: Checked inductivity of 569 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 497 trivial. 0 not checked. [2021-12-06 23:08:54,038 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:08:54,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191875839] [2021-12-06 23:08:54,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191875839] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:08:54,038 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:08:54,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-06 23:08:54,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76577094] [2021-12-06 23:08:54,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:08:54,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-06 23:08:54,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:08:54,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-06 23:08:54,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-12-06 23:08:54,039 INFO L87 Difference]: Start difference. First operand 400 states and 494 transitions. Second operand has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 13 states have internal predecessors, (60), 7 states have call successors, (28), 3 states have call predecessors, (28), 3 states have return successors, (27), 6 states have call predecessors, (27), 6 states have call successors, (27) [2021-12-06 23:08:55,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:08:55,025 INFO L93 Difference]: Finished difference Result 460 states and 574 transitions. [2021-12-06 23:08:55,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 23:08:55,025 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 13 states have internal predecessors, (60), 7 states have call successors, (28), 3 states have call predecessors, (28), 3 states have return successors, (27), 6 states have call predecessors, (27), 6 states have call successors, (27) Word has length 205 [2021-12-06 23:08:55,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:08:55,028 INFO L225 Difference]: With dead ends: 460 [2021-12-06 23:08:55,028 INFO L226 Difference]: Without dead ends: 419 [2021-12-06 23:08:55,028 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-12-06 23:08:55,029 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 123 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 1468 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 594 SdHoareTripleChecker+Invalid, 1566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 23:08:55,029 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 594 Invalid, 1566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1468 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-06 23:08:55,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2021-12-06 23:08:55,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 407. [2021-12-06 23:08:55,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 269 states have (on average 1.0780669144981412) internal successors, (290), 278 states have internal predecessors, (290), 96 states have call successors, (96), 37 states have call predecessors, (96), 41 states have return successors, (119), 91 states have call predecessors, (119), 94 states have call successors, (119) [2021-12-06 23:08:55,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 505 transitions. [2021-12-06 23:08:55,057 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 505 transitions. Word has length 205 [2021-12-06 23:08:55,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:08:55,057 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 505 transitions. [2021-12-06 23:08:55,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 13 states have internal predecessors, (60), 7 states have call successors, (28), 3 states have call predecessors, (28), 3 states have return successors, (27), 6 states have call predecessors, (27), 6 states have call successors, (27) [2021-12-06 23:08:55,058 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 505 transitions. [2021-12-06 23:08:55,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-12-06 23:08:55,059 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:08:55,059 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:08:55,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-12-06 23:08:55,059 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:08:55,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:08:55,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1724689080, now seen corresponding path program 2 times [2021-12-06 23:08:55,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:08:55,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016003262] [2021-12-06 23:08:55,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:08:55,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:08:55,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:55,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 23:08:55,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:55,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 23:08:55,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:55,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 23:08:55,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:55,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:08:55,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:55,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 23:08:55,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:55,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-06 23:08:55,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:55,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-06 23:08:55,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:55,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-06 23:08:55,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:55,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-06 23:08:55,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:55,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-06 23:08:55,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:55,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-06 23:08:55,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:55,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:08:55,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:55,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 23:08:55,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:55,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-06 23:08:55,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:55,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-06 23:08:55,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:55,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-06 23:08:55,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:55,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-06 23:08:55,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:55,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-06 23:08:55,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:55,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-06 23:08:55,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:55,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2021-12-06 23:08:55,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:55,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2021-12-06 23:08:55,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:55,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2021-12-06 23:08:55,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:55,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 185 [2021-12-06 23:08:55,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:55,431 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 411 trivial. 0 not checked. [2021-12-06 23:08:55,431 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:08:55,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016003262] [2021-12-06 23:08:55,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016003262] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:08:55,432 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:08:55,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-06 23:08:55,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027575757] [2021-12-06 23:08:55,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:08:55,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-06 23:08:55,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:08:55,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-06 23:08:55,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-12-06 23:08:55,433 INFO L87 Difference]: Start difference. First operand 407 states and 505 transitions. Second operand has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 8 states have internal predecessors, (62), 4 states have call successors, (24), 4 states have call predecessors, (24), 2 states have return successors, (23), 5 states have call predecessors, (23), 4 states have call successors, (23) [2021-12-06 23:08:56,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:08:56,031 INFO L93 Difference]: Finished difference Result 505 states and 643 transitions. [2021-12-06 23:08:56,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 23:08:56,031 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 8 states have internal predecessors, (62), 4 states have call successors, (24), 4 states have call predecessors, (24), 2 states have return successors, (23), 5 states have call predecessors, (23), 4 states have call successors, (23) Word has length 201 [2021-12-06 23:08:56,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:08:56,033 INFO L225 Difference]: With dead ends: 505 [2021-12-06 23:08:56,033 INFO L226 Difference]: Without dead ends: 423 [2021-12-06 23:08:56,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-12-06 23:08:56,034 INFO L933 BasicCegarLoop]: 164 mSDtfsCounter, 58 mSDsluCounter, 722 mSDsCounter, 0 mSdLazyCounter, 978 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 886 SdHoareTripleChecker+Invalid, 1034 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 978 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 23:08:56,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 886 Invalid, 1034 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 978 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 23:08:56,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2021-12-06 23:08:56,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 406. [2021-12-06 23:08:56,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 268 states have (on average 1.0746268656716418) internal successors, (288), 277 states have internal predecessors, (288), 96 states have call successors, (96), 37 states have call predecessors, (96), 41 states have return successors, (119), 91 states have call predecessors, (119), 94 states have call successors, (119) [2021-12-06 23:08:56,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 503 transitions. [2021-12-06 23:08:56,067 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 503 transitions. Word has length 201 [2021-12-06 23:08:56,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:08:56,068 INFO L470 AbstractCegarLoop]: Abstraction has 406 states and 503 transitions. [2021-12-06 23:08:56,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 8 states have internal predecessors, (62), 4 states have call successors, (24), 4 states have call predecessors, (24), 2 states have return successors, (23), 5 states have call predecessors, (23), 4 states have call successors, (23) [2021-12-06 23:08:56,068 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 503 transitions. [2021-12-06 23:08:56,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2021-12-06 23:08:56,069 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:08:56,069 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:08:56,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-12-06 23:08:56,070 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:08:56,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:08:56,070 INFO L85 PathProgramCache]: Analyzing trace with hash 964377542, now seen corresponding path program 1 times [2021-12-06 23:08:56,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:08:56,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403780810] [2021-12-06 23:08:56,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:08:56,070 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:08:56,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:56,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 23:08:56,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:56,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 23:08:56,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:56,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 23:08:56,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:56,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:08:56,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:56,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 23:08:56,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:56,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-06 23:08:56,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:56,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-06 23:08:56,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:56,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-06 23:08:56,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:56,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-06 23:08:56,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:56,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-06 23:08:56,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:56,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-06 23:08:56,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:56,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:08:56,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:56,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 23:08:56,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:56,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-06 23:08:56,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:56,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-06 23:08:56,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:56,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-06 23:08:56,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:56,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-06 23:08:56,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:56,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-06 23:08:56,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:56,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-06 23:08:56,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:56,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2021-12-06 23:08:56,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:56,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2021-12-06 23:08:56,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:56,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2021-12-06 23:08:56,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:56,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 184 [2021-12-06 23:08:56,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:56,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 191 [2021-12-06 23:08:56,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:56,470 INFO L134 CoverageAnalysis]: Checked inductivity of 419 backedges. 34 proven. 6 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2021-12-06 23:08:56,470 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:08:56,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403780810] [2021-12-06 23:08:56,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403780810] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:08:56,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435570558] [2021-12-06 23:08:56,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:08:56,470 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:08:56,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0adc387-e7df-4069-9c09-29814be0ed52/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:08:56,471 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0adc387-e7df-4069-9c09-29814be0ed52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:08:56,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0adc387-e7df-4069-9c09-29814be0ed52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-06 23:08:57,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:57,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 3011 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-06 23:08:57,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:08:57,771 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-06 23:08:57,772 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 51 treesize of output 27 [2021-12-06 23:08:57,806 INFO L134 CoverageAnalysis]: Checked inductivity of 419 backedges. 164 proven. 0 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2021-12-06 23:08:57,806 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 23:08:57,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435570558] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:08:57,806 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 23:08:57,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [12] total 19 [2021-12-06 23:08:57,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883093415] [2021-12-06 23:08:57,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:08:57,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-06 23:08:57,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:08:57,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-06 23:08:57,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-12-06 23:08:57,807 INFO L87 Difference]: Start difference. First operand 406 states and 503 transitions. Second operand has 11 states, 10 states have (on average 8.3) internal successors, (83), 11 states have internal predecessors, (83), 5 states have call successors, (25), 3 states have call predecessors, (25), 4 states have return successors, (24), 4 states have call predecessors, (24), 5 states have call successors, (24) [2021-12-06 23:08:58,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:08:58,137 INFO L93 Difference]: Finished difference Result 522 states and 661 transitions. [2021-12-06 23:08:58,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 23:08:58,138 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 8.3) internal successors, (83), 11 states have internal predecessors, (83), 5 states have call successors, (25), 3 states have call predecessors, (25), 4 states have return successors, (24), 4 states have call predecessors, (24), 5 states have call successors, (24) Word has length 207 [2021-12-06 23:08:58,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:08:58,140 INFO L225 Difference]: With dead ends: 522 [2021-12-06 23:08:58,140 INFO L226 Difference]: Without dead ends: 412 [2021-12-06 23:08:58,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 244 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2021-12-06 23:08:58,141 INFO L933 BasicCegarLoop]: 154 mSDtfsCounter, 63 mSDsluCounter, 857 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 1011 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 23:08:58,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 1011 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 293 Invalid, 0 Unknown, 56 Unchecked, 0.2s Time] [2021-12-06 23:08:58,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2021-12-06 23:08:58,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 410. [2021-12-06 23:08:58,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 271 states have (on average 1.0738007380073802) internal successors, (291), 280 states have internal predecessors, (291), 96 states have call successors, (96), 38 states have call predecessors, (96), 42 states have return successors, (118), 91 states have call predecessors, (118), 94 states have call successors, (118) [2021-12-06 23:08:58,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 505 transitions. [2021-12-06 23:08:58,175 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 505 transitions. Word has length 207 [2021-12-06 23:08:58,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:08:58,176 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 505 transitions. [2021-12-06 23:08:58,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 8.3) internal successors, (83), 11 states have internal predecessors, (83), 5 states have call successors, (25), 3 states have call predecessors, (25), 4 states have return successors, (24), 4 states have call predecessors, (24), 5 states have call successors, (24) [2021-12-06 23:08:58,176 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 505 transitions. [2021-12-06 23:08:58,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2021-12-06 23:08:58,177 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:08:58,177 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:08:58,200 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0adc387-e7df-4069-9c09-29814be0ed52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-12-06 23:08:58,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0adc387-e7df-4069-9c09-29814be0ed52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:08:58,379 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:08:58,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:08:58,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1451537710, now seen corresponding path program 1 times [2021-12-06 23:08:58,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:08:58,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227704605] [2021-12-06 23:08:58,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:08:58,381 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:08:58,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:58,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 23:08:58,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:58,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 23:08:58,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:58,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 23:08:58,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:58,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 23:08:58,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:58,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 23:08:58,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:58,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-06 23:08:58,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:58,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-06 23:08:58,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:58,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-06 23:08:58,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:58,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:08:58,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:58,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 23:08:58,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:58,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 23:08:58,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:58,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 23:08:58,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:58,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 23:08:58,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:58,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-06 23:08:58,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:58,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-06 23:08:58,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:58,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-12-06 23:08:58,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:58,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-06 23:08:58,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:58,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-06 23:08:58,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:58,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-06 23:08:58,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:58,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-12-06 23:08:58,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:58,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-12-06 23:08:58,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:58,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-06 23:08:58,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:58,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2021-12-06 23:08:58,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:58,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2021-12-06 23:08:58,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:58,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2021-12-06 23:08:58,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:58,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2021-12-06 23:08:58,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:58,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 189 [2021-12-06 23:08:58,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:58,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2021-12-06 23:08:58,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:58,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 203 [2021-12-06 23:08:58,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:58,680 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 592 trivial. 0 not checked. [2021-12-06 23:08:58,680 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:08:58,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227704605] [2021-12-06 23:08:58,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227704605] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:08:58,680 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:08:58,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 23:08:58,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677579526] [2021-12-06 23:08:58,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:08:58,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 23:08:58,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:08:58,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 23:08:58,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 23:08:58,681 INFO L87 Difference]: Start difference. First operand 410 states and 505 transitions. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 3 states have call successors, (30), 3 states have call predecessors, (30), 2 states have return successors, (29), 3 states have call predecessors, (29), 2 states have call successors, (29) [2021-12-06 23:08:58,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:08:58,898 INFO L93 Difference]: Finished difference Result 423 states and 518 transitions. [2021-12-06 23:08:58,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 23:08:58,899 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 3 states have call successors, (30), 3 states have call predecessors, (30), 2 states have return successors, (29), 3 states have call predecessors, (29), 2 states have call successors, (29) Word has length 213 [2021-12-06 23:08:58,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:08:58,901 INFO L225 Difference]: With dead ends: 423 [2021-12-06 23:08:58,901 INFO L226 Difference]: Without dead ends: 407 [2021-12-06 23:08:58,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-12-06 23:08:58,902 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 53 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 23:08:58,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 338 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 23:08:58,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2021-12-06 23:08:58,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 407. [2021-12-06 23:08:58,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 269 states have (on average 1.066914498141264) internal successors, (287), 277 states have internal predecessors, (287), 96 states have call successors, (96), 38 states have call predecessors, (96), 41 states have return successors, (117), 91 states have call predecessors, (117), 94 states have call successors, (117) [2021-12-06 23:08:58,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 500 transitions. [2021-12-06 23:08:58,940 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 500 transitions. Word has length 213 [2021-12-06 23:08:58,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:08:58,940 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 500 transitions. [2021-12-06 23:08:58,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 3 states have call successors, (30), 3 states have call predecessors, (30), 2 states have return successors, (29), 3 states have call predecessors, (29), 2 states have call successors, (29) [2021-12-06 23:08:58,940 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 500 transitions. [2021-12-06 23:08:58,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2021-12-06 23:08:58,942 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:08:58,942 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:08:58,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-12-06 23:08:58,942 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:08:58,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:08:58,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1973367763, now seen corresponding path program 1 times [2021-12-06 23:08:58,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:08:58,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058598234] [2021-12-06 23:08:58,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:08:58,943 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:08:58,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:59,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 23:08:59,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:59,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 23:08:59,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:59,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 23:08:59,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:59,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 23:08:59,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:59,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 23:08:59,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:59,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-06 23:08:59,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:59,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-06 23:08:59,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:59,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-06 23:08:59,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:59,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:08:59,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:59,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 23:08:59,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:59,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 23:08:59,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:59,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 23:08:59,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:59,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 23:08:59,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:59,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-06 23:08:59,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:59,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-06 23:08:59,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:59,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-12-06 23:08:59,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:59,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-06 23:08:59,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:59,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-06 23:08:59,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:59,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-06 23:08:59,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:59,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-12-06 23:08:59,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:59,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-12-06 23:08:59,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:59,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-06 23:08:59,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:59,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2021-12-06 23:08:59,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:59,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2021-12-06 23:08:59,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:59,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2021-12-06 23:08:59,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:59,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2021-12-06 23:08:59,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:59,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 189 [2021-12-06 23:08:59,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:59,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2021-12-06 23:08:59,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:59,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 203 [2021-12-06 23:08:59,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:59,174 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 614 trivial. 0 not checked. [2021-12-06 23:08:59,174 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:08:59,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058598234] [2021-12-06 23:08:59,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058598234] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:08:59,174 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:08:59,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-06 23:08:59,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851028145] [2021-12-06 23:08:59,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:08:59,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 23:08:59,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:08:59,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 23:08:59,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-06 23:08:59,175 INFO L87 Difference]: Start difference. First operand 407 states and 500 transitions. Second operand has 9 states, 8 states have (on average 6.875) internal successors, (55), 6 states have internal predecessors, (55), 2 states have call successors, (30), 3 states have call predecessors, (30), 2 states have return successors, (29), 2 states have call predecessors, (29), 1 states have call successors, (29) [2021-12-06 23:08:59,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:08:59,463 INFO L93 Difference]: Finished difference Result 415 states and 508 transitions. [2021-12-06 23:08:59,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 23:08:59,464 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.875) internal successors, (55), 6 states have internal predecessors, (55), 2 states have call successors, (30), 3 states have call predecessors, (30), 2 states have return successors, (29), 2 states have call predecessors, (29), 1 states have call successors, (29) Word has length 215 [2021-12-06 23:08:59,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:08:59,466 INFO L225 Difference]: With dead ends: 415 [2021-12-06 23:08:59,466 INFO L226 Difference]: Without dead ends: 413 [2021-12-06 23:08:59,466 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-12-06 23:08:59,467 INFO L933 BasicCegarLoop]: 139 mSDtfsCounter, 49 mSDsluCounter, 701 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 840 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 23:08:59,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 840 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 23:08:59,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2021-12-06 23:08:59,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 412. [2021-12-06 23:08:59,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 272 states have (on average 1.0661764705882353) internal successors, (290), 280 states have internal predecessors, (290), 97 states have call successors, (97), 39 states have call predecessors, (97), 42 states have return successors, (118), 92 states have call predecessors, (118), 95 states have call successors, (118) [2021-12-06 23:08:59,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 505 transitions. [2021-12-06 23:08:59,502 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 505 transitions. Word has length 215 [2021-12-06 23:08:59,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:08:59,502 INFO L470 AbstractCegarLoop]: Abstraction has 412 states and 505 transitions. [2021-12-06 23:08:59,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.875) internal successors, (55), 6 states have internal predecessors, (55), 2 states have call successors, (30), 3 states have call predecessors, (30), 2 states have return successors, (29), 2 states have call predecessors, (29), 1 states have call successors, (29) [2021-12-06 23:08:59,503 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 505 transitions. [2021-12-06 23:08:59,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2021-12-06 23:08:59,504 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:08:59,504 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 5, 5, 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, 1, 1, 1, 1, 1] [2021-12-06 23:08:59,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-12-06 23:08:59,505 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:08:59,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:08:59,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1720653826, now seen corresponding path program 1 times [2021-12-06 23:08:59,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:08:59,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001641963] [2021-12-06 23:08:59,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:08:59,505 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:08:59,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:59,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 23:08:59,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:59,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 23:08:59,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:59,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 23:08:59,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:59,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:08:59,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:59,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 23:08:59,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:59,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-06 23:08:59,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:59,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-06 23:08:59,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:59,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-06 23:08:59,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:59,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-06 23:08:59,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:59,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-06 23:08:59,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:59,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-06 23:08:59,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:59,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:08:59,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:59,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 23:08:59,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:59,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-06 23:08:59,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:59,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-06 23:08:59,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:59,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-06 23:08:59,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:59,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-06 23:08:59,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:59,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-06 23:08:59,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:59,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-06 23:08:59,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:59,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2021-12-06 23:08:59,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:59,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2021-12-06 23:08:59,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:59,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 180 [2021-12-06 23:08:59,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:59,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2021-12-06 23:08:59,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:59,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2021-12-06 23:08:59,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:59,831 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 53 proven. 8 refuted. 0 times theorem prover too weak. 382 trivial. 0 not checked. [2021-12-06 23:08:59,832 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:08:59,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001641963] [2021-12-06 23:08:59,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001641963] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:08:59,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026239494] [2021-12-06 23:08:59,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:08:59,832 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:08:59,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0adc387-e7df-4069-9c09-29814be0ed52/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:08:59,833 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0adc387-e7df-4069-9c09-29814be0ed52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:08:59,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0adc387-e7df-4069-9c09-29814be0ed52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-06 23:09:00,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:09:00,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 3023 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-06 23:09:00,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:09:00,274 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 159 proven. 0 refuted. 0 times theorem prover too weak. 284 trivial. 0 not checked. [2021-12-06 23:09:00,275 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 23:09:00,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026239494] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:09:00,275 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 23:09:00,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11] total 12 [2021-12-06 23:09:00,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782321887] [2021-12-06 23:09:00,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:09:00,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 23:09:00,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:09:00,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 23:09:00,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-12-06 23:09:00,276 INFO L87 Difference]: Start difference. First operand 412 states and 505 transitions. Second operand has 9 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 3 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) [2021-12-06 23:09:00,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:09:00,381 INFO L93 Difference]: Finished difference Result 528 states and 661 transitions. [2021-12-06 23:09:00,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 23:09:00,382 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 3 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) Word has length 211 [2021-12-06 23:09:00,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:09:00,384 INFO L225 Difference]: With dead ends: 528 [2021-12-06 23:09:00,384 INFO L226 Difference]: Without dead ends: 412 [2021-12-06 23:09:00,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 256 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-12-06 23:09:00,386 INFO L933 BasicCegarLoop]: 150 mSDtfsCounter, 11 mSDsluCounter, 996 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 1146 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:09:00,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 1146 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 23:09:00,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2021-12-06 23:09:00,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 412. [2021-12-06 23:09:00,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 272 states have (on average 1.0661764705882353) internal successors, (290), 280 states have internal predecessors, (290), 97 states have call successors, (97), 39 states have call predecessors, (97), 42 states have return successors, (117), 92 states have call predecessors, (117), 95 states have call successors, (117) [2021-12-06 23:09:00,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 504 transitions. [2021-12-06 23:09:00,417 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 504 transitions. Word has length 211 [2021-12-06 23:09:00,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:09:00,417 INFO L470 AbstractCegarLoop]: Abstraction has 412 states and 504 transitions. [2021-12-06 23:09:00,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 3 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) [2021-12-06 23:09:00,418 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 504 transitions. [2021-12-06 23:09:00,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2021-12-06 23:09:00,419 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:09:00,419 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:09:00,455 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0adc387-e7df-4069-9c09-29814be0ed52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-12-06 23:09:00,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0adc387-e7df-4069-9c09-29814be0ed52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:09:00,620 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:09:00,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:09:00,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1343146903, now seen corresponding path program 2 times [2021-12-06 23:09:00,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:09:00,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127884902] [2021-12-06 23:09:00,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:09:00,620 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:09:01,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:09:01,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 23:09:01,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:09:01,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 23:09:01,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:09:01,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 23:09:01,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:09:01,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:09:01,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:09:01,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 23:09:01,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:09:01,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-06 23:09:01,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:09:01,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-06 23:09:01,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:09:01,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-06 23:09:01,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:09:01,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-06 23:09:01,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:09:01,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-06 23:09:01,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:09:01,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-06 23:09:01,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:09:01,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:09:01,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:09:01,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 23:09:01,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:09:01,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-06 23:09:01,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:09:01,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-06 23:09:01,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:09:01,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-06 23:09:01,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:09:01,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-06 23:09:01,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:09:01,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-06 23:09:01,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:09:01,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-06 23:09:01,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:09:01,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2021-12-06 23:09:01,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:09:01,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2021-12-06 23:09:01,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:09:01,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2021-12-06 23:09:01,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:09:01,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 190 [2021-12-06 23:09:01,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:09:01,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2021-12-06 23:09:01,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:09:01,692 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 117 proven. 7 refuted. 0 times theorem prover too weak. 329 trivial. 0 not checked. [2021-12-06 23:09:01,692 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:09:01,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127884902] [2021-12-06 23:09:01,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127884902] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:09:01,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404125174] [2021-12-06 23:09:01,693 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 23:09:01,693 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:09:01,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0adc387-e7df-4069-9c09-29814be0ed52/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:09:01,693 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0adc387-e7df-4069-9c09-29814be0ed52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:09:01,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0adc387-e7df-4069-9c09-29814be0ed52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-06 23:09:08,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 23:09:08,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:09:08,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 3033 conjuncts, 110 conjunts are in the unsatisfiable core [2021-12-06 23:09:08,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:09:08,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 23:09:08,361 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-06 23:09:08,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-12-06 23:09:08,409 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 13 treesize of output 9 [2021-12-06 23:09:08,669 INFO L354 Elim1Store]: treesize reduction 22, result has 40.5 percent of original size [2021-12-06 23:09:08,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 24 [2021-12-06 23:09:08,699 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 27 treesize of output 27 [2021-12-06 23:09:10,794 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 27 treesize of output 27 [2021-12-06 23:09:21,224 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_aws_byte_cursor_left_trim_pred_~#trimmed~1.base_23| Int) (|v_ULTIMATE.start_aws_byte_cursor_right_trim_pred_~source#1.base_BEFORE_CALL_5| Int) (|v_aws_byte_cursor_left_trim_pred_~#trimmed~1.offset_21| Int) (|ULTIMATE.start_aws_byte_cursor_trim_pred_~source#1.base| Int)) (let ((.cse1 (select (select |c_#memory_$Pointer$.base| |ULTIMATE.start_aws_byte_cursor_trim_pred_~source#1.base|) 8)) (.cse0 (select (select |c_#memory_$Pointer$.base| |v_aws_byte_cursor_left_trim_pred_~#trimmed~1.base_23|) (+ 8 |v_aws_byte_cursor_left_trim_pred_~#trimmed~1.offset_21|)))) (and (= .cse0 .cse1) (not (= .cse1 0)) (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_cursor_right_trim_pred_~source#1.base_BEFORE_CALL_5|) 8) .cse0)))) is different from true [2021-12-06 23:09:25,698 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_aws_byte_cursor_left_trim_pred_~#trimmed~1.base_23| Int) (|v_aws_byte_cursor_left_trim_pred_~#trimmed~1.offset_21| Int) (|v_ULTIMATE.start_aws_byte_cursor_right_trim_pred_~source#1.base_BEFORE_CALL_6| Int) (|ULTIMATE.start_aws_byte_cursor_trim_pred_~source#1.base| Int)) (let ((.cse1 (select (select |c_#memory_$Pointer$.base| |ULTIMATE.start_aws_byte_cursor_trim_pred_~source#1.base|) 8)) (.cse0 (select (select |c_#memory_$Pointer$.base| |v_aws_byte_cursor_left_trim_pred_~#trimmed~1.base_23|) (+ 8 |v_aws_byte_cursor_left_trim_pred_~#trimmed~1.offset_21|)))) (and (= .cse0 .cse1) (not (= .cse1 0)) (= .cse0 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_cursor_right_trim_pred_~source#1.base_BEFORE_CALL_6|) 8))))) is different from true [2021-12-06 23:09:30,263 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_byte_cursor_right_trim_pred_~source#1.base_BEFORE_CALL_7| Int) (|v_aws_byte_cursor_left_trim_pred_~#trimmed~1.base_23| Int) (|v_aws_byte_cursor_left_trim_pred_~#trimmed~1.offset_21| Int) (|ULTIMATE.start_aws_byte_cursor_trim_pred_~source#1.base| Int)) (let ((.cse1 (select (select |c_#memory_$Pointer$.base| |ULTIMATE.start_aws_byte_cursor_trim_pred_~source#1.base|) 8)) (.cse0 (select (select |c_#memory_$Pointer$.base| |v_aws_byte_cursor_left_trim_pred_~#trimmed~1.base_23|) (+ 8 |v_aws_byte_cursor_left_trim_pred_~#trimmed~1.offset_21|)))) (and (= .cse0 .cse1) (not (= .cse1 0)) (= .cse0 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_cursor_right_trim_pred_~source#1.base_BEFORE_CALL_7|) 8))))) is different from true [2021-12-06 23:09:33,360 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_byte_cursor_right_trim_pred_~source#1.base_BEFORE_CALL_8| Int) (|v_aws_byte_cursor_left_trim_pred_~#trimmed~1.base_23| Int) (|v_aws_byte_cursor_left_trim_pred_~#trimmed~1.offset_21| Int) (|ULTIMATE.start_aws_byte_cursor_trim_pred_~source#1.base| Int)) (let ((.cse1 (select (select |c_#memory_$Pointer$.base| |ULTIMATE.start_aws_byte_cursor_trim_pred_~source#1.base|) 8)) (.cse0 (select (select |c_#memory_$Pointer$.base| |v_aws_byte_cursor_left_trim_pred_~#trimmed~1.base_23|) (+ 8 |v_aws_byte_cursor_left_trim_pred_~#trimmed~1.offset_21|)))) (and (= .cse0 .cse1) (not (= .cse1 0)) (= .cse0 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_cursor_right_trim_pred_~source#1.base_BEFORE_CALL_8|) 8))))) is different from true [2021-12-06 23:09:36,428 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_byte_cursor_right_trim_pred_~source#1.base_BEFORE_CALL_9| Int) (|v_aws_byte_cursor_left_trim_pred_~#trimmed~1.base_23| Int) (|v_aws_byte_cursor_left_trim_pred_~#trimmed~1.offset_21| Int) (|ULTIMATE.start_aws_byte_cursor_trim_pred_~source#1.base| Int)) (let ((.cse1 (select (select |c_#memory_$Pointer$.base| |ULTIMATE.start_aws_byte_cursor_trim_pred_~source#1.base|) 8)) (.cse0 (select (select |c_#memory_$Pointer$.base| |v_aws_byte_cursor_left_trim_pred_~#trimmed~1.base_23|) (+ 8 |v_aws_byte_cursor_left_trim_pred_~#trimmed~1.offset_21|)))) (and (= .cse0 .cse1) (not (= .cse1 0)) (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_cursor_right_trim_pred_~source#1.base_BEFORE_CALL_9|) 8) .cse0)))) is different from true [2021-12-06 23:09:39,976 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 134 proven. 169 refuted. 0 times theorem prover too weak. 67 trivial. 83 not checked. [2021-12-06 23:09:39,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:09:40,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404125174] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:09:40,306 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 23:09:40,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 32] total 46 [2021-12-06 23:09:40,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085425924] [2021-12-06 23:09:40,306 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 23:09:40,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-06 23:09:40,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:09:40,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-06 23:09:40,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=2097, Unknown=7, NotChecked=480, Total=2756 [2021-12-06 23:09:40,308 INFO L87 Difference]: Start difference. First operand 412 states and 504 transitions. Second operand has 46 states, 44 states have (on average 4.159090909090909) internal successors, (183), 40 states have internal predecessors, (183), 16 states have call successors, (49), 14 states have call predecessors, (49), 13 states have return successors, (48), 16 states have call predecessors, (48), 15 states have call successors, (48) [2021-12-06 23:10:14,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:10:14,110 INFO L93 Difference]: Finished difference Result 686 states and 933 transitions. [2021-12-06 23:10:14,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-12-06 23:10:14,111 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 44 states have (on average 4.159090909090909) internal successors, (183), 40 states have internal predecessors, (183), 16 states have call successors, (49), 14 states have call predecessors, (49), 13 states have return successors, (48), 16 states have call predecessors, (48), 15 states have call successors, (48) Word has length 213 [2021-12-06 23:10:14,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:10:14,114 INFO L225 Difference]: With dead ends: 686 [2021-12-06 23:10:14,114 INFO L226 Difference]: Without dead ends: 593 [2021-12-06 23:10:14,117 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 262 SyntacticMatches, 23 SemanticMatches, 91 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 2514 ImplicationChecksByTransitivity, 63.0s TimeCoverageRelationStatistics Valid=517, Invalid=7138, Unknown=21, NotChecked=880, Total=8556 [2021-12-06 23:10:14,117 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 228 mSDsluCounter, 1568 mSDsCounter, 0 mSdLazyCounter, 3321 mSolverCounterSat, 261 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 1764 SdHoareTripleChecker+Invalid, 7200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 261 IncrementalHoareTripleChecker+Valid, 3321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3618 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-06 23:10:14,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 1764 Invalid, 7200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [261 Valid, 3321 Invalid, 0 Unknown, 3618 Unchecked, 1.7s Time] [2021-12-06 23:10:14,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2021-12-06 23:10:14,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 449. [2021-12-06 23:10:14,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 297 states have (on average 1.0673400673400673) internal successors, (317), 305 states have internal predecessors, (317), 105 states have call successors, (105), 42 states have call predecessors, (105), 46 states have return successors, (125), 101 states have call predecessors, (125), 103 states have call successors, (125) [2021-12-06 23:10:14,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 547 transitions. [2021-12-06 23:10:14,153 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 547 transitions. Word has length 213 [2021-12-06 23:10:14,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:10:14,153 INFO L470 AbstractCegarLoop]: Abstraction has 449 states and 547 transitions. [2021-12-06 23:10:14,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 44 states have (on average 4.159090909090909) internal successors, (183), 40 states have internal predecessors, (183), 16 states have call successors, (49), 14 states have call predecessors, (49), 13 states have return successors, (48), 16 states have call predecessors, (48), 15 states have call successors, (48) [2021-12-06 23:10:14,153 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 547 transitions. [2021-12-06 23:10:14,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2021-12-06 23:10:14,155 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:10:14,155 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 11, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:10:14,192 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0adc387-e7df-4069-9c09-29814be0ed52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-12-06 23:10:14,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0adc387-e7df-4069-9c09-29814be0ed52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-12-06 23:10:14,356 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:10:14,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:10:14,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1166965989, now seen corresponding path program 1 times [2021-12-06 23:10:14,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:10:14,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738108288] [2021-12-06 23:10:14,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:10:14,359 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:10:14,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:14,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 23:10:14,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:14,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 23:10:14,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:14,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 23:10:14,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:14,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 23:10:14,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:14,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 23:10:14,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:14,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-06 23:10:14,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:14,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-06 23:10:14,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:14,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-06 23:10:14,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:14,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:10:14,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:14,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 23:10:14,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:14,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 23:10:14,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:14,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 23:10:14,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:14,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 23:10:14,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:14,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-06 23:10:14,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:14,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-06 23:10:14,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:14,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-12-06 23:10:14,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:14,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-06 23:10:14,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:14,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-06 23:10:14,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:14,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-06 23:10:14,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:14,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-12-06 23:10:14,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:14,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-12-06 23:10:14,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:14,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-06 23:10:14,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:14,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2021-12-06 23:10:14,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:14,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2021-12-06 23:10:14,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:14,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2021-12-06 23:10:14,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:14,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2021-12-06 23:10:14,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:14,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 189 [2021-12-06 23:10:14,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:14,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2021-12-06 23:10:14,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:14,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 203 [2021-12-06 23:10:14,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:14,873 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 592 trivial. 0 not checked. [2021-12-06 23:10:14,873 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:10:14,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738108288] [2021-12-06 23:10:14,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738108288] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:10:14,874 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:10:14,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-12-06 23:10:14,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732231716] [2021-12-06 23:10:14,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:10:14,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-06 23:10:14,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:10:14,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-06 23:10:14,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-12-06 23:10:14,875 INFO L87 Difference]: Start difference. First operand 449 states and 547 transitions. Second operand has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 16 states have internal predecessors, (61), 8 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (29), 8 states have call predecessors, (29), 7 states have call successors, (29) [2021-12-06 23:10:16,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:10:16,005 INFO L93 Difference]: Finished difference Result 474 states and 582 transitions. [2021-12-06 23:10:16,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-06 23:10:16,006 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 16 states have internal predecessors, (61), 8 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (29), 8 states have call predecessors, (29), 7 states have call successors, (29) Word has length 219 [2021-12-06 23:10:16,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:10:16,008 INFO L225 Difference]: With dead ends: 474 [2021-12-06 23:10:16,008 INFO L226 Difference]: Without dead ends: 461 [2021-12-06 23:10:16,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2021-12-06 23:10:16,009 INFO L933 BasicCegarLoop]: 120 mSDtfsCounter, 81 mSDsluCounter, 786 mSDsCounter, 0 mSdLazyCounter, 1753 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 906 SdHoareTripleChecker+Invalid, 1842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:10:16,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 906 Invalid, 1842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1753 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-06 23:10:16,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2021-12-06 23:10:16,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 457. [2021-12-06 23:10:16,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 300 states have (on average 1.0666666666666667) internal successors, (320), 308 states have internal predecessors, (320), 110 states have call successors, (110), 42 states have call predecessors, (110), 46 states have return successors, (132), 106 states have call predecessors, (132), 108 states have call successors, (132) [2021-12-06 23:10:16,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 562 transitions. [2021-12-06 23:10:16,042 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 562 transitions. Word has length 219 [2021-12-06 23:10:16,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:10:16,042 INFO L470 AbstractCegarLoop]: Abstraction has 457 states and 562 transitions. [2021-12-06 23:10:16,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 16 states have internal predecessors, (61), 8 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (29), 8 states have call predecessors, (29), 7 states have call successors, (29) [2021-12-06 23:10:16,042 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 562 transitions. [2021-12-06 23:10:16,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2021-12-06 23:10:16,044 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:10:16,044 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:10:16,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-12-06 23:10:16,044 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:10:16,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:10:16,045 INFO L85 PathProgramCache]: Analyzing trace with hash -295336162, now seen corresponding path program 1 times [2021-12-06 23:10:16,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:10:16,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428392801] [2021-12-06 23:10:16,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:10:16,045 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:10:16,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:16,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 23:10:16,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:16,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 23:10:16,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:16,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 23:10:16,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:16,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:10:16,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:16,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 23:10:16,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:16,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-06 23:10:16,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:16,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-06 23:10:16,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:16,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-06 23:10:16,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:16,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-06 23:10:16,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:16,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-06 23:10:16,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:16,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-06 23:10:16,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:16,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:10:16,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:16,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 23:10:16,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:16,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-06 23:10:16,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:16,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-06 23:10:16,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:16,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-06 23:10:16,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:16,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-06 23:10:16,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:16,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-06 23:10:16,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:16,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-06 23:10:16,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:16,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2021-12-06 23:10:16,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:16,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2021-12-06 23:10:16,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:16,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2021-12-06 23:10:16,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:16,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 190 [2021-12-06 23:10:16,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:16,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2021-12-06 23:10:16,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:16,357 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 407 trivial. 0 not checked. [2021-12-06 23:10:16,357 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:10:16,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428392801] [2021-12-06 23:10:16,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428392801] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:10:16,358 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:10:16,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-12-06 23:10:16,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417749681] [2021-12-06 23:10:16,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:10:16,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-06 23:10:16,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:10:16,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-06 23:10:16,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2021-12-06 23:10:16,359 INFO L87 Difference]: Start difference. First operand 457 states and 562 transitions. Second operand has 15 states, 14 states have (on average 5.0) internal successors, (70), 11 states have internal predecessors, (70), 2 states have call successors, (25), 4 states have call predecessors, (25), 2 states have return successors, (24), 2 states have call predecessors, (24), 1 states have call successors, (24) [2021-12-06 23:10:16,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:10:16,934 INFO L93 Difference]: Finished difference Result 465 states and 570 transitions. [2021-12-06 23:10:16,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-06 23:10:16,934 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 5.0) internal successors, (70), 11 states have internal predecessors, (70), 2 states have call successors, (25), 4 states have call predecessors, (25), 2 states have return successors, (24), 2 states have call predecessors, (24), 1 states have call successors, (24) Word has length 215 [2021-12-06 23:10:16,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:10:16,936 INFO L225 Difference]: With dead ends: 465 [2021-12-06 23:10:16,936 INFO L226 Difference]: Without dead ends: 463 [2021-12-06 23:10:16,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=564, Unknown=0, NotChecked=0, Total=702 [2021-12-06 23:10:16,938 INFO L933 BasicCegarLoop]: 147 mSDtfsCounter, 100 mSDsluCounter, 1225 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 1372 SdHoareTripleChecker+Invalid, 811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 23:10:16,938 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 1372 Invalid, 811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 715 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 23:10:16,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2021-12-06 23:10:16,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 462. [2021-12-06 23:10:16,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 303 states have (on average 1.066006600660066) internal successors, (323), 311 states have internal predecessors, (323), 111 states have call successors, (111), 43 states have call predecessors, (111), 47 states have return successors, (133), 107 states have call predecessors, (133), 109 states have call successors, (133) [2021-12-06 23:10:16,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 567 transitions. [2021-12-06 23:10:16,982 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 567 transitions. Word has length 215 [2021-12-06 23:10:16,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:10:16,982 INFO L470 AbstractCegarLoop]: Abstraction has 462 states and 567 transitions. [2021-12-06 23:10:16,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 5.0) internal successors, (70), 11 states have internal predecessors, (70), 2 states have call successors, (25), 4 states have call predecessors, (25), 2 states have return successors, (24), 2 states have call predecessors, (24), 1 states have call successors, (24) [2021-12-06 23:10:16,982 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 567 transitions. [2021-12-06 23:10:16,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2021-12-06 23:10:16,984 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:10:16,984 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:10:16,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-12-06 23:10:16,984 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:10:16,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:10:16,984 INFO L85 PathProgramCache]: Analyzing trace with hash -100494655, now seen corresponding path program 1 times [2021-12-06 23:10:16,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:10:16,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360139122] [2021-12-06 23:10:16,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:10:16,985 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:10:17,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:17,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 23:10:17,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:17,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 23:10:17,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:17,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 23:10:17,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:17,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:10:17,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:17,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 23:10:17,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:17,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-06 23:10:17,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:17,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-06 23:10:17,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:17,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-06 23:10:17,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:17,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-06 23:10:17,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:17,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-06 23:10:17,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:17,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-06 23:10:18,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:18,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:10:18,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:18,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 23:10:18,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:18,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-06 23:10:18,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:18,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-06 23:10:18,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:18,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-06 23:10:18,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:18,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-06 23:10:18,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:18,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-06 23:10:18,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:18,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-06 23:10:18,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:18,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2021-12-06 23:10:18,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:18,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2021-12-06 23:10:18,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:18,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2021-12-06 23:10:18,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:18,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 190 [2021-12-06 23:10:18,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:18,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 200 [2021-12-06 23:10:18,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:18,384 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 64 proven. 3 refuted. 0 times theorem prover too weak. 389 trivial. 0 not checked. [2021-12-06 23:10:18,384 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:10:18,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360139122] [2021-12-06 23:10:18,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360139122] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:10:18,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019351123] [2021-12-06 23:10:18,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:10:18,385 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:10:18,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0adc387-e7df-4069-9c09-29814be0ed52/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:10:18,385 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0adc387-e7df-4069-9c09-29814be0ed52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:10:18,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0adc387-e7df-4069-9c09-29814be0ed52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-06 23:10:19,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:19,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 3054 conjuncts, 233 conjunts are in the unsatisfiable core [2021-12-06 23:10:19,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:10:19,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 23:10:20,158 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-06 23:10:20,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-12-06 23:10:20,276 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 21 treesize of output 20 [2021-12-06 23:10:20,280 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 11 treesize of output 7 [2021-12-06 23:10:20,754 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 23:10:20,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-06 23:10:20,805 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 14 treesize of output 16 [2021-12-06 23:10:20,808 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 23 treesize of output 23 [2021-12-06 23:10:21,103 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 14 treesize of output 16 [2021-12-06 23:10:21,106 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 25 treesize of output 25 [2021-12-06 23:10:24,673 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_aws_byte_cursor_left_trim_pred_~#trimmed~1.offset_BEFORE_CALL_12| Int) (|v_aws_byte_cursor_left_trim_pred_#in~source.base_BEFORE_CALL_21| Int) (|v_aws_byte_cursor_left_trim_pred_~#trimmed~1.base_BEFORE_CALL_12| Int) (|v_aws_byte_cursor_left_trim_pred_#in~source.offset_BEFORE_CALL_21| Int)) (let ((.cse1 (+ |v_aws_byte_cursor_left_trim_pred_~#trimmed~1.offset_BEFORE_CALL_12| 8))) (let ((.cse0 (select (select |c_#memory_$Pointer$.offset| |v_aws_byte_cursor_left_trim_pred_~#trimmed~1.base_BEFORE_CALL_12|) .cse1))) (and (= (select (select |c_#memory_$Pointer$.offset| |v_aws_byte_cursor_left_trim_pred_#in~source.base_BEFORE_CALL_21|) (+ 8 |v_aws_byte_cursor_left_trim_pred_#in~source.offset_BEFORE_CALL_21|)) .cse0) (not (= (mod (select (select |c_#memory_int| (select (select |c_#memory_$Pointer$.base| |v_aws_byte_cursor_left_trim_pred_~#trimmed~1.base_BEFORE_CALL_12|) .cse1)) .cse0) 256) 0)) (= (select (select |c_#memory_int| |v_aws_byte_cursor_left_trim_pred_~#trimmed~1.base_BEFORE_CALL_12|) |v_aws_byte_cursor_left_trim_pred_~#trimmed~1.offset_BEFORE_CALL_12|) (select (select |c_#memory_int| |v_aws_byte_cursor_left_trim_pred_#in~source.base_BEFORE_CALL_21|) |v_aws_byte_cursor_left_trim_pred_#in~source.offset_BEFORE_CALL_21|)))))) is different from true [2021-12-06 23:10:27,038 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_aws_byte_cursor_left_trim_pred_~#trimmed~1.offset_BEFORE_CALL_13| Int) (|v_aws_byte_cursor_left_trim_pred_#in~source.base_BEFORE_CALL_22| Int) (|v_aws_byte_cursor_left_trim_pred_~#trimmed~1.base_BEFORE_CALL_13| Int) (|v_aws_byte_cursor_left_trim_pred_#in~source.offset_BEFORE_CALL_22| Int)) (let ((.cse0 (+ |v_aws_byte_cursor_left_trim_pred_~#trimmed~1.offset_BEFORE_CALL_13| 8))) (let ((.cse1 (select (select |c_#memory_$Pointer$.offset| |v_aws_byte_cursor_left_trim_pred_~#trimmed~1.base_BEFORE_CALL_13|) .cse0))) (and (= (select (select |c_#memory_int| |v_aws_byte_cursor_left_trim_pred_~#trimmed~1.base_BEFORE_CALL_13|) |v_aws_byte_cursor_left_trim_pred_~#trimmed~1.offset_BEFORE_CALL_13|) (select (select |c_#memory_int| |v_aws_byte_cursor_left_trim_pred_#in~source.base_BEFORE_CALL_22|) |v_aws_byte_cursor_left_trim_pred_#in~source.offset_BEFORE_CALL_22|)) (not (= (mod (select (select |c_#memory_int| (select (select |c_#memory_$Pointer$.base| |v_aws_byte_cursor_left_trim_pred_~#trimmed~1.base_BEFORE_CALL_13|) .cse0)) .cse1) 256) 0)) (= (select (select |c_#memory_$Pointer$.offset| |v_aws_byte_cursor_left_trim_pred_#in~source.base_BEFORE_CALL_22|) (+ 8 |v_aws_byte_cursor_left_trim_pred_#in~source.offset_BEFORE_CALL_22|)) .cse1))))) is different from true [2021-12-06 23:10:29,274 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_aws_byte_cursor_left_trim_pred_~#trimmed~1.offset_BEFORE_CALL_14| Int) (|v_aws_byte_cursor_left_trim_pred_#in~source.base_BEFORE_CALL_23| Int) (|v_aws_byte_cursor_left_trim_pred_~#trimmed~1.base_BEFORE_CALL_14| Int) (|v_aws_byte_cursor_left_trim_pred_#in~source.offset_BEFORE_CALL_23| Int)) (let ((.cse0 (+ |v_aws_byte_cursor_left_trim_pred_~#trimmed~1.offset_BEFORE_CALL_14| 8))) (let ((.cse1 (select (select |c_#memory_$Pointer$.offset| |v_aws_byte_cursor_left_trim_pred_~#trimmed~1.base_BEFORE_CALL_14|) .cse0))) (and (= (select (select |c_#memory_int| |v_aws_byte_cursor_left_trim_pred_#in~source.base_BEFORE_CALL_23|) |v_aws_byte_cursor_left_trim_pred_#in~source.offset_BEFORE_CALL_23|) (select (select |c_#memory_int| |v_aws_byte_cursor_left_trim_pred_~#trimmed~1.base_BEFORE_CALL_14|) |v_aws_byte_cursor_left_trim_pred_~#trimmed~1.offset_BEFORE_CALL_14|)) (not (= (mod (select (select |c_#memory_int| (select (select |c_#memory_$Pointer$.base| |v_aws_byte_cursor_left_trim_pred_~#trimmed~1.base_BEFORE_CALL_14|) .cse0)) .cse1) 256) 0)) (= .cse1 (select (select |c_#memory_$Pointer$.offset| |v_aws_byte_cursor_left_trim_pred_#in~source.base_BEFORE_CALL_23|) (+ 8 |v_aws_byte_cursor_left_trim_pred_#in~source.offset_BEFORE_CALL_23|))))))) is different from true [2021-12-06 23:10:31,624 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_aws_byte_cursor_left_trim_pred_~#trimmed~1.offset_BEFORE_CALL_15| Int) (|v_aws_byte_cursor_left_trim_pred_~#trimmed~1.base_BEFORE_CALL_15| Int) (|v_aws_byte_cursor_left_trim_pred_#in~source.offset_BEFORE_CALL_24| Int) (|v_aws_byte_cursor_left_trim_pred_#in~source.base_BEFORE_CALL_24| Int)) (let ((.cse0 (+ |v_aws_byte_cursor_left_trim_pred_~#trimmed~1.offset_BEFORE_CALL_15| 8))) (let ((.cse1 (select (select |c_#memory_$Pointer$.offset| |v_aws_byte_cursor_left_trim_pred_~#trimmed~1.base_BEFORE_CALL_15|) .cse0))) (and (not (= (mod (select (select |c_#memory_int| (select (select |c_#memory_$Pointer$.base| |v_aws_byte_cursor_left_trim_pred_~#trimmed~1.base_BEFORE_CALL_15|) .cse0)) .cse1) 256) 0)) (= (select (select |c_#memory_$Pointer$.offset| |v_aws_byte_cursor_left_trim_pred_#in~source.base_BEFORE_CALL_24|) (+ 8 |v_aws_byte_cursor_left_trim_pred_#in~source.offset_BEFORE_CALL_24|)) .cse1) (= (select (select |c_#memory_int| |v_aws_byte_cursor_left_trim_pred_#in~source.base_BEFORE_CALL_24|) |v_aws_byte_cursor_left_trim_pred_#in~source.offset_BEFORE_CALL_24|) (select (select |c_#memory_int| |v_aws_byte_cursor_left_trim_pred_~#trimmed~1.base_BEFORE_CALL_15|) |v_aws_byte_cursor_left_trim_pred_~#trimmed~1.offset_BEFORE_CALL_15|)))))) is different from true [2021-12-06 23:10:36,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:10:36,259 INFO L354 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2021-12-06 23:10:36,260 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 3 new quantified variables, introduced 5 case distinctions, treesize of input 128 treesize of output 88 [2021-12-06 23:10:36,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:10:36,276 INFO L354 Elim1Store]: treesize reduction 84, result has 1.2 percent of original size [2021-12-06 23:10:36,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 130 treesize of output 76 [2021-12-06 23:10:50,569 INFO L354 Elim1Store]: treesize reduction 397, result has 24.7 percent of original size [2021-12-06 23:10:50,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 35 case distinctions, treesize of input 134 treesize of output 201