./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_init_copy_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_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/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_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_init_copy_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/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_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/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 9248d62da968900adf628e209d21739bec2ffe4f64c1d45016706037787190a6 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 18:13:36,725 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 18:13:36,727 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 18:13:36,749 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 18:13:36,749 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 18:13:36,750 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 18:13:36,752 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 18:13:36,753 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 18:13:36,755 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 18:13:36,756 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 18:13:36,756 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 18:13:36,757 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 18:13:36,758 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 18:13:36,759 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 18:13:36,760 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 18:13:36,761 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 18:13:36,762 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 18:13:36,762 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 18:13:36,764 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 18:13:36,766 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 18:13:36,767 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 18:13:36,768 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 18:13:36,769 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 18:13:36,770 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 18:13:36,773 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 18:13:36,773 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 18:13:36,773 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 18:13:36,774 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 18:13:36,775 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 18:13:36,775 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 18:13:36,776 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 18:13:36,776 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 18:13:36,777 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 18:13:36,778 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 18:13:36,778 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 18:13:36,778 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 18:13:36,779 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 18:13:36,779 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 18:13:36,779 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 18:13:36,780 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 18:13:36,780 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 18:13:36,781 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-06 18:13:36,806 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 18:13:36,806 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 18:13:36,806 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 18:13:36,807 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 18:13:36,807 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 18:13:36,807 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 18:13:36,808 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 18:13:36,808 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 18:13:36,808 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 18:13:36,808 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 18:13:36,808 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 18:13:36,808 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 18:13:36,808 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 18:13:36,808 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 18:13:36,809 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 18:13:36,809 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 18:13:36,809 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 18:13:36,809 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 18:13:36,809 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 18:13:36,809 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 18:13:36,809 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 18:13:36,809 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 18:13:36,809 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 18:13:36,810 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 18:13:36,810 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 18:13:36,810 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 18:13:36,810 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 18:13:36,810 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 18:13:36,810 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 18:13:36,810 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 18:13:36,810 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 18:13:36,810 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_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9248d62da968900adf628e209d21739bec2ffe4f64c1d45016706037787190a6 [2021-12-06 18:13:36,990 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 18:13:37,007 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 18:13:37,009 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 18:13:37,010 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 18:13:37,011 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 18:13:37,012 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/aws-c-common/aws_byte_buf_init_copy_harness.i [2021-12-06 18:13:37,053 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/data/cd3a2cedd/b33c0e6b924a4ea8868c54695a864c84/FLAG4ec6d2240 [2021-12-06 18:13:37,632 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 18:13:37,632 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/sv-benchmarks/c/aws-c-common/aws_byte_buf_init_copy_harness.i [2021-12-06 18:13:37,656 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/data/cd3a2cedd/b33c0e6b924a4ea8868c54695a864c84/FLAG4ec6d2240 [2021-12-06 18:13:38,039 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/data/cd3a2cedd/b33c0e6b924a4ea8868c54695a864c84 [2021-12-06 18:13:38,041 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 18:13:38,042 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 18:13:38,043 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 18:13:38,043 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 18:13:38,046 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 18:13:38,047 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 06:13:38" (1/1) ... [2021-12-06 18:13:38,047 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a01530e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:13:38, skipping insertion in model container [2021-12-06 18:13:38,048 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 06:13:38" (1/1) ... [2021-12-06 18:13:38,053 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 18:13:38,126 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 18:13:38,320 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_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/sv-benchmarks/c/aws-c-common/aws_byte_buf_init_copy_harness.i[4496,4509] [2021-12-06 18:13:38,325 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_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/sv-benchmarks/c/aws-c-common/aws_byte_buf_init_copy_harness.i[4556,4569] [2021-12-06 18:13:39,077 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 18:13:39,078 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 18:13:39,078 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 18:13:39,079 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 18:13:39,080 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 18:13:39,090 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 18:13:39,090 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 18:13:39,092 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 18:13:39,092 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 18:13:39,382 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-06 18:13:39,383 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-06 18:13:39,384 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-06 18:13:39,385 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-06 18:13:39,386 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-06 18:13:39,386 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-06 18:13:39,387 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-06 18:13:39,387 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-06 18:13:39,388 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-06 18:13:39,388 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-06 18:13:39,509 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-06 18:13:39,571 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 18:13:39,571 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 18:13:39,626 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 18:13:39,671 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 18:13:39,681 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_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/sv-benchmarks/c/aws-c-common/aws_byte_buf_init_copy_harness.i[4496,4509] [2021-12-06 18:13:39,682 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_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/sv-benchmarks/c/aws-c-common/aws_byte_buf_init_copy_harness.i[4556,4569] [2021-12-06 18:13:39,708 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 18:13:39,709 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 18:13:39,709 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 18:13:39,709 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 18:13:39,710 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 18:13:39,715 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 18:13:39,715 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 18:13:39,716 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 18:13:39,716 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 18:13:39,740 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-06 18:13:39,741 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-06 18:13:39,742 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-06 18:13:39,742 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-06 18:13:39,743 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-06 18:13:39,743 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-06 18:13:39,744 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-06 18:13:39,744 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-06 18:13:39,744 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-06 18:13:39,745 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-06 18:13:39,759 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-06 18:13:39,799 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 18:13:39,799 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 18:13:39,821 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 18:13:40,014 INFO L208 MainTranslator]: Completed translation [2021-12-06 18:13:40,014 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:13:40 WrapperNode [2021-12-06 18:13:40,014 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 18:13:40,015 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 18:13:40,015 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 18:13:40,015 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 18:13:40,020 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:13:40" (1/1) ... [2021-12-06 18:13:40,088 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:13:40" (1/1) ... [2021-12-06 18:13:40,144 INFO L137 Inliner]: procedures = 691, calls = 2624, calls flagged for inlining = 63, calls inlined = 11, statements flattened = 937 [2021-12-06 18:13:40,145 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 18:13:40,145 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 18:13:40,145 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 18:13:40,145 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 18:13:40,152 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:13:40" (1/1) ... [2021-12-06 18:13:40,153 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:13:40" (1/1) ... [2021-12-06 18:13:40,159 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:13:40" (1/1) ... [2021-12-06 18:13:40,160 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:13:40" (1/1) ... [2021-12-06 18:13:40,189 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:13:40" (1/1) ... [2021-12-06 18:13:40,193 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:13:40" (1/1) ... [2021-12-06 18:13:40,200 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:13:40" (1/1) ... [2021-12-06 18:13:40,209 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 18:13:40,210 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 18:13:40,210 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 18:13:40,210 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 18:13:40,210 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:13:40" (1/1) ... [2021-12-06 18:13:40,216 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 18:13:40,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:13:40,235 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 18:13:40,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 18:13:40,276 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_valid [2021-12-06 18:13:40,276 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_valid [2021-12-06 18:13:40,276 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-06 18:13:40,276 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-12-06 18:13:40,276 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-12-06 18:13:40,276 INFO L130 BoogieDeclarations]: Found specification of procedure aws_allocator_is_valid [2021-12-06 18:13:40,277 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_allocator_is_valid [2021-12-06 18:13:40,277 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-06 18:13:40,277 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2021-12-06 18:13:40,277 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2021-12-06 18:13:40,277 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-06 18:13:40,277 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-06 18:13:40,284 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-06 18:13:40,285 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 18:13:40,285 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-06 18:13:40,285 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy_impl [2021-12-06 18:13:40,285 INFO L138 BoogieDeclarations]: Found implementation of procedure memcpy_impl [2021-12-06 18:13:40,285 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 18:13:40,285 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 18:13:40,285 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-12-06 18:13:40,286 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-12-06 18:13:40,286 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2021-12-06 18:13:40,286 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2021-12-06 18:13:40,286 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_malloc [2021-12-06 18:13:40,286 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_malloc [2021-12-06 18:13:40,286 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-12-06 18:13:40,286 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-12-06 18:13:40,287 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-06 18:13:40,287 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-06 18:13:40,287 INFO L130 BoogieDeclarations]: Found specification of procedure my_memcpy [2021-12-06 18:13:40,287 INFO L138 BoogieDeclarations]: Found implementation of procedure my_memcpy [2021-12-06 18:13:40,287 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mem_acquire [2021-12-06 18:13:40,287 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mem_acquire [2021-12-06 18:13:40,287 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-06 18:13:40,287 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-06 18:13:40,287 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-06 18:13:40,287 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2021-12-06 18:13:40,288 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2021-12-06 18:13:40,288 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-12-06 18:13:40,288 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-12-06 18:13:40,288 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-06 18:13:40,288 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 18:13:40,471 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 18:13:40,473 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 18:13:41,515 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 18:13:41,521 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 18:13:41,522 INFO L301 CfgBuilder]: Removed 7 assume(true) statements. [2021-12-06 18:13:41,523 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 06:13:41 BoogieIcfgContainer [2021-12-06 18:13:41,524 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 18:13:41,525 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 18:13:41,525 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 18:13:41,527 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 18:13:41,527 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 06:13:38" (1/3) ... [2021-12-06 18:13:41,528 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36914bc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 06:13:41, skipping insertion in model container [2021-12-06 18:13:41,528 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:13:40" (2/3) ... [2021-12-06 18:13:41,528 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36914bc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 06:13:41, skipping insertion in model container [2021-12-06 18:13:41,528 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 06:13:41" (3/3) ... [2021-12-06 18:13:41,529 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_byte_buf_init_copy_harness.i [2021-12-06 18:13:41,533 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 18:13:41,534 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 18:13:41,572 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 18:13:41,578 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 18:13:41,578 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 18:13:41,598 INFO L276 IsEmpty]: Start isEmpty. Operand has 185 states, 122 states have (on average 1.221311475409836) internal successors, (149), 121 states have internal predecessors, (149), 49 states have call successors, (49), 15 states have call predecessors, (49), 15 states have return successors, (49), 49 states have call predecessors, (49), 49 states have call successors, (49) [2021-12-06 18:13:41,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-06 18:13:41,606 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:13:41,607 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:13:41,607 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:13:41,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:13:41,611 INFO L85 PathProgramCache]: Analyzing trace with hash -283420546, now seen corresponding path program 1 times [2021-12-06 18:13:41,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:13:41,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344804736] [2021-12-06 18:13:41,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:13:41,620 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:13:41,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:41,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:13:41,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:41,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:13:42,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:42,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 18:13:42,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:42,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:13:42,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:42,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 18:13:42,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:42,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-06 18:13:42,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:42,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 18:13:42,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:42,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:13:42,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:42,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-06 18:13:42,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:42,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-06 18:13:42,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:42,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-06 18:13:42,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:42,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-06 18:13:42,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:42,107 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-06 18:13:42,108 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:13:42,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344804736] [2021-12-06 18:13:42,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344804736] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:13:42,108 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:13:42,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 18:13:42,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495730741] [2021-12-06 18:13:42,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:13:42,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 18:13:42,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:13:42,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 18:13:42,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:13:42,135 INFO L87 Difference]: Start difference. First operand has 185 states, 122 states have (on average 1.221311475409836) internal successors, (149), 121 states have internal predecessors, (149), 49 states have call successors, (49), 15 states have call predecessors, (49), 15 states have return successors, (49), 49 states have call predecessors, (49), 49 states have call successors, (49) Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 2 states have internal predecessors, (35), 2 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-06 18:13:42,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:13:42,363 INFO L93 Difference]: Finished difference Result 376 states and 532 transitions. [2021-12-06 18:13:42,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 18:13:42,365 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 2 states have internal predecessors, (35), 2 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) Word has length 82 [2021-12-06 18:13:42,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:13:42,374 INFO L225 Difference]: With dead ends: 376 [2021-12-06 18:13:42,374 INFO L226 Difference]: Without dead ends: 189 [2021-12-06 18:13:42,379 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 33 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 18:13:42,382 INFO L933 BasicCegarLoop]: 225 mSDtfsCounter, 76 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:13:42,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 294 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 18:13:42,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-12-06 18:13:42,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 179. [2021-12-06 18:13:42,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 114 states have (on average 1.1666666666666667) internal successors, (133), 115 states have internal predecessors, (133), 49 states have call successors, (49), 15 states have call predecessors, (49), 15 states have return successors, (48), 48 states have call predecessors, (48), 48 states have call successors, (48) [2021-12-06 18:13:42,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 230 transitions. [2021-12-06 18:13:42,430 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 230 transitions. Word has length 82 [2021-12-06 18:13:42,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:13:42,430 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 230 transitions. [2021-12-06 18:13:42,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 2 states have internal predecessors, (35), 2 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-06 18:13:42,431 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 230 transitions. [2021-12-06 18:13:42,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-06 18:13:42,434 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:13:42,435 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:13:42,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 18:13:42,435 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:13:42,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:13:42,435 INFO L85 PathProgramCache]: Analyzing trace with hash 426190495, now seen corresponding path program 1 times [2021-12-06 18:13:42,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:13:42,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356348320] [2021-12-06 18:13:42,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:13:42,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:13:42,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:42,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:13:42,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:42,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:13:42,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:42,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 18:13:42,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:42,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:13:42,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:42,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 18:13:42,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:42,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-06 18:13:42,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:42,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 18:13:42,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:42,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:13:42,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:42,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-06 18:13:42,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:42,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-06 18:13:42,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:42,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-06 18:13:42,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:42,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-06 18:13:42,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:42,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-06 18:13:42,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:42,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-06 18:13:42,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:42,743 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-12-06 18:13:42,743 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:13:42,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356348320] [2021-12-06 18:13:42,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356348320] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:13:42,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775141377] [2021-12-06 18:13:42,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:13:42,744 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:13:42,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:13:42,745 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:13:42,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 18:13:43,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:43,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 2598 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-06 18:13:43,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:13:43,247 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-06 18:13:43,247 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:13:43,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775141377] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:13:43,247 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 18:13:43,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2021-12-06 18:13:43,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399896844] [2021-12-06 18:13:43,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:13:43,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 18:13:43,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:13:43,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 18:13:43,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-12-06 18:13:43,250 INFO L87 Difference]: Start difference. First operand 179 states and 230 transitions. Second operand has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-06 18:13:43,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:13:43,294 INFO L93 Difference]: Finished difference Result 248 states and 316 transitions. [2021-12-06 18:13:43,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 18:13:43,295 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) Word has length 92 [2021-12-06 18:13:43,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:13:43,299 INFO L225 Difference]: With dead ends: 248 [2021-12-06 18:13:43,299 INFO L226 Difference]: Without dead ends: 173 [2021-12-06 18:13:43,300 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-12-06 18:13:43,302 INFO L933 BasicCegarLoop]: 228 mSDtfsCounter, 1 mSDsluCounter, 902 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 1130 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:13:43,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 1130 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:13:43,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-12-06 18:13:43,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2021-12-06 18:13:43,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 110 states have (on average 1.1545454545454545) internal successors, (127), 111 states have internal predecessors, (127), 47 states have call successors, (47), 15 states have call predecessors, (47), 15 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2021-12-06 18:13:43,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 220 transitions. [2021-12-06 18:13:43,322 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 220 transitions. Word has length 92 [2021-12-06 18:13:43,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:13:43,323 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 220 transitions. [2021-12-06 18:13:43,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-06 18:13:43,324 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 220 transitions. [2021-12-06 18:13:43,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-06 18:13:43,326 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:13:43,326 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:13:43,350 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 18:13:43,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-12-06 18:13:43,527 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:13:43,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:13:43,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1901749225, now seen corresponding path program 1 times [2021-12-06 18:13:43,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:13:43,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369224069] [2021-12-06 18:13:43,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:13:43,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:13:43,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:43,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:13:43,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:43,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:13:43,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:43,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 18:13:43,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:43,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:13:43,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:43,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 18:13:43,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:43,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-06 18:13:43,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:43,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 18:13:43,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:43,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:13:43,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:43,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-06 18:13:43,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:43,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-06 18:13:43,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:43,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-06 18:13:43,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:43,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-06 18:13:43,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:43,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-06 18:13:43,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:43,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-06 18:13:43,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:43,864 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-12-06 18:13:43,865 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:13:43,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369224069] [2021-12-06 18:13:43,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369224069] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:13:43,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711977826] [2021-12-06 18:13:43,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:13:43,865 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:13:43,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:13:43,866 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:13:43,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 18:13:44,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:44,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 2622 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-06 18:13:44,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:13:44,319 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-06 18:13:44,319 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:13:44,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711977826] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:13:44,320 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 18:13:44,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 11 [2021-12-06 18:13:44,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161577592] [2021-12-06 18:13:44,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:13:44,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 18:13:44,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:13:44,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 18:13:44,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-12-06 18:13:44,321 INFO L87 Difference]: Start difference. First operand 173 states and 220 transitions. Second operand has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 states have internal predecessors, (46), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 3 states have call successors, (13) [2021-12-06 18:13:44,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:13:44,470 INFO L93 Difference]: Finished difference Result 249 states and 320 transitions. [2021-12-06 18:13:44,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 18:13:44,470 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 states have internal predecessors, (46), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 3 states have call successors, (13) Word has length 95 [2021-12-06 18:13:44,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:13:44,472 INFO L225 Difference]: With dead ends: 249 [2021-12-06 18:13:44,473 INFO L226 Difference]: Without dead ends: 176 [2021-12-06 18:13:44,473 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-12-06 18:13:44,474 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 78 mSDsluCounter, 915 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 1119 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:13:44,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 1119 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 18:13:44,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-12-06 18:13:44,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 176. [2021-12-06 18:13:44,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 112 states have (on average 1.1517857142857142) internal successors, (129), 114 states have internal predecessors, (129), 47 states have call successors, (47), 15 states have call predecessors, (47), 16 states have return successors, (49), 46 states have call predecessors, (49), 46 states have call successors, (49) [2021-12-06 18:13:44,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 225 transitions. [2021-12-06 18:13:44,488 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 225 transitions. Word has length 95 [2021-12-06 18:13:44,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:13:44,488 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 225 transitions. [2021-12-06 18:13:44,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 states have internal predecessors, (46), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 3 states have call successors, (13) [2021-12-06 18:13:44,488 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 225 transitions. [2021-12-06 18:13:44,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-06 18:13:44,490 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:13:44,490 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:13:44,513 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 18:13:44,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:13:44,691 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:13:44,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:13:44,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1019605314, now seen corresponding path program 1 times [2021-12-06 18:13:44,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:13:44,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307844515] [2021-12-06 18:13:44,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:13:44,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:13:44,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:44,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:13:44,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:44,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:13:44,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:44,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 18:13:44,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:44,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:13:44,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:44,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 18:13:44,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:44,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-06 18:13:44,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:44,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 18:13:44,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:44,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:13:44,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:44,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-06 18:13:44,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:44,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-06 18:13:44,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:44,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-06 18:13:44,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:44,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-06 18:13:44,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:44,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-06 18:13:44,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:44,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-06 18:13:44,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:44,990 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-12-06 18:13:44,990 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:13:44,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307844515] [2021-12-06 18:13:44,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307844515] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:13:44,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678830724] [2021-12-06 18:13:44,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:13:44,991 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:13:44,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:13:44,992 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:13:44,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 18:13:45,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:45,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 2639 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 18:13:45,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:13:45,455 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-06 18:13:45,455 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:13:45,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678830724] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:13:45,455 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 18:13:45,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2021-12-06 18:13:45,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252508835] [2021-12-06 18:13:45,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:13:45,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 18:13:45,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:13:45,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 18:13:45,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-12-06 18:13:45,457 INFO L87 Difference]: Start difference. First operand 176 states and 225 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-12-06 18:13:45,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:13:45,596 INFO L93 Difference]: Finished difference Result 338 states and 429 transitions. [2021-12-06 18:13:45,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 18:13:45,597 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 101 [2021-12-06 18:13:45,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:13:45,598 INFO L225 Difference]: With dead ends: 338 [2021-12-06 18:13:45,599 INFO L226 Difference]: Without dead ends: 176 [2021-12-06 18:13:45,599 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-12-06 18:13:45,600 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 249 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:13:45,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 481 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 18:13:45,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-12-06 18:13:45,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 176. [2021-12-06 18:13:45,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 112 states have (on average 1.1517857142857142) internal successors, (129), 114 states have internal predecessors, (129), 47 states have call successors, (47), 15 states have call predecessors, (47), 16 states have return successors, (47), 46 states have call predecessors, (47), 46 states have call successors, (47) [2021-12-06 18:13:45,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 223 transitions. [2021-12-06 18:13:45,613 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 223 transitions. Word has length 101 [2021-12-06 18:13:45,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:13:45,613 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 223 transitions. [2021-12-06 18:13:45,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-12-06 18:13:45,613 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 223 transitions. [2021-12-06 18:13:45,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-12-06 18:13:45,615 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:13:45,615 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:13:45,648 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 18:13:45,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:13:45,817 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:13:45,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:13:45,818 INFO L85 PathProgramCache]: Analyzing trace with hash -2090058387, now seen corresponding path program 2 times [2021-12-06 18:13:45,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:13:45,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391015639] [2021-12-06 18:13:45,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:13:45,819 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:13:45,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:46,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:13:46,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:46,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:13:46,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:46,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 18:13:46,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:46,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:13:46,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:46,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 18:13:46,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:46,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 18:13:46,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:46,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 18:13:46,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:46,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:13:46,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:46,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-06 18:13:46,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:46,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-06 18:13:46,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:46,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-06 18:13:46,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:46,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-06 18:13:46,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:46,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-06 18:13:46,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:46,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-06 18:13:46,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:46,174 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-12-06 18:13:46,174 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:13:46,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391015639] [2021-12-06 18:13:46,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391015639] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:13:46,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309360006] [2021-12-06 18:13:46,175 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:13:46,175 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:13:46,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:13:46,176 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:13:46,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 18:13:46,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-06 18:13:46,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:13:46,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 2303 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-06 18:13:46,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:13:46,576 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-12-06 18:13:46,576 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:13:46,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309360006] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:13:46,577 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 18:13:46,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2021-12-06 18:13:46,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919756516] [2021-12-06 18:13:46,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:13:46,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 18:13:46,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:13:46,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 18:13:46,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-12-06 18:13:46,578 INFO L87 Difference]: Start difference. First operand 176 states and 223 transitions. Second operand has 8 states, 7 states have (on average 7.285714285714286) internal successors, (51), 6 states have internal predecessors, (51), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-12-06 18:13:46,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:13:46,627 INFO L93 Difference]: Finished difference Result 188 states and 240 transitions. [2021-12-06 18:13:46,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 18:13:46,627 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.285714285714286) internal successors, (51), 6 states have internal predecessors, (51), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) Word has length 107 [2021-12-06 18:13:46,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:13:46,629 INFO L225 Difference]: With dead ends: 188 [2021-12-06 18:13:46,629 INFO L226 Difference]: Without dead ends: 186 [2021-12-06 18:13:46,630 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-12-06 18:13:46,630 INFO L933 BasicCegarLoop]: 219 mSDtfsCounter, 22 mSDsluCounter, 1274 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 1493 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:13:46,631 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 1493 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:13:46,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-12-06 18:13:46,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 185. [2021-12-06 18:13:46,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 118 states have (on average 1.1440677966101696) internal successors, (135), 121 states have internal predecessors, (135), 48 states have call successors, (48), 16 states have call predecessors, (48), 18 states have return successors, (54), 47 states have call predecessors, (54), 47 states have call successors, (54) [2021-12-06 18:13:46,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 237 transitions. [2021-12-06 18:13:46,643 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 237 transitions. Word has length 107 [2021-12-06 18:13:46,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:13:46,643 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 237 transitions. [2021-12-06 18:13:46,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.285714285714286) internal successors, (51), 6 states have internal predecessors, (51), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-12-06 18:13:46,643 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 237 transitions. [2021-12-06 18:13:46,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-06 18:13:46,645 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:13:46,645 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:13:46,667 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 18:13:46,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:13:46,847 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:13:46,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:13:46,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1813963275, now seen corresponding path program 1 times [2021-12-06 18:13:46,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:13:46,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618003292] [2021-12-06 18:13:46,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:13:46,849 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:13:47,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:47,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:13:47,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:47,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:13:47,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:47,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 18:13:47,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:47,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:13:47,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:47,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 18:13:47,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:47,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 18:13:47,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:47,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 18:13:47,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:47,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:13:47,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:47,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-06 18:13:47,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:47,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-06 18:13:47,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:47,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-06 18:13:47,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:47,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-06 18:13:47,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:47,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-06 18:13:47,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:47,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-06 18:13:47,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:47,190 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-12-06 18:13:47,190 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:13:47,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618003292] [2021-12-06 18:13:47,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618003292] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:13:47,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192146580] [2021-12-06 18:13:47,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:13:47,191 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:13:47,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:13:47,191 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:13:47,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 18:13:47,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:47,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 2668 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 18:13:47,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:13:47,640 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-06 18:13:47,640 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:13:47,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192146580] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:13:47,640 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 18:13:47,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2021-12-06 18:13:47,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120631436] [2021-12-06 18:13:47,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:13:47,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 18:13:47,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:13:47,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 18:13:47,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-12-06 18:13:47,642 INFO L87 Difference]: Start difference. First operand 185 states and 237 transitions. Second operand has 7 states, 6 states have (on average 10.666666666666666) internal successors, (64), 7 states have internal predecessors, (64), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-12-06 18:13:47,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:13:47,818 INFO L93 Difference]: Finished difference Result 342 states and 429 transitions. [2021-12-06 18:13:47,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 18:13:47,819 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 10.666666666666666) internal successors, (64), 7 states have internal predecessors, (64), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 111 [2021-12-06 18:13:47,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:13:47,820 INFO L225 Difference]: With dead ends: 342 [2021-12-06 18:13:47,820 INFO L226 Difference]: Without dead ends: 182 [2021-12-06 18:13:47,821 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-12-06 18:13:47,822 INFO L933 BasicCegarLoop]: 173 mSDtfsCounter, 275 mSDsluCounter, 602 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 775 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:13:47,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [275 Valid, 775 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 18:13:47,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-12-06 18:13:47,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2021-12-06 18:13:47,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 116 states have (on average 1.1379310344827587) internal successors, (132), 118 states have internal predecessors, (132), 48 states have call successors, (48), 16 states have call predecessors, (48), 17 states have return successors, (53), 47 states have call predecessors, (53), 47 states have call successors, (53) [2021-12-06 18:13:47,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 233 transitions. [2021-12-06 18:13:47,837 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 233 transitions. Word has length 111 [2021-12-06 18:13:47,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:13:47,837 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 233 transitions. [2021-12-06 18:13:47,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 10.666666666666666) internal successors, (64), 7 states have internal predecessors, (64), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-12-06 18:13:47,838 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 233 transitions. [2021-12-06 18:13:47,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-12-06 18:13:47,839 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:13:47,839 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:13:47,862 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 18:13:48,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-06 18:13:48,041 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:13:48,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:13:48,043 INFO L85 PathProgramCache]: Analyzing trace with hash 693216864, now seen corresponding path program 1 times [2021-12-06 18:13:48,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:13:48,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977739452] [2021-12-06 18:13:48,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:13:48,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:13:48,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:48,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:13:48,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:48,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:13:48,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:48,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 18:13:48,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:48,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:13:48,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:48,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 18:13:48,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:48,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 18:13:48,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:48,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 18:13:48,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:48,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:13:48,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:48,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-06 18:13:48,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:48,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-06 18:13:48,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:48,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-06 18:13:48,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:48,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-06 18:13:48,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:48,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-06 18:13:48,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:48,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-06 18:13:48,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:48,411 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-12-06 18:13:48,411 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:13:48,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977739452] [2021-12-06 18:13:48,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977739452] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:13:48,411 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:13:48,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 18:13:48,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864451716] [2021-12-06 18:13:48,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:13:48,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 18:13:48,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:13:48,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 18:13:48,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 18:13:48,413 INFO L87 Difference]: Start difference. First operand 182 states and 233 transitions. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-06 18:13:48,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:13:48,861 INFO L93 Difference]: Finished difference Result 286 states and 361 transitions. [2021-12-06 18:13:48,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 18:13:48,861 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 117 [2021-12-06 18:13:48,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:13:48,863 INFO L225 Difference]: With dead ends: 286 [2021-12-06 18:13:48,863 INFO L226 Difference]: Without dead ends: 200 [2021-12-06 18:13:48,864 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-06 18:13:48,865 INFO L933 BasicCegarLoop]: 193 mSDtfsCounter, 166 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 522 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 18:13:48,865 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 522 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 18:13:48,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-12-06 18:13:48,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 183. [2021-12-06 18:13:48,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 117 states have (on average 1.1367521367521367) internal successors, (133), 119 states have internal predecessors, (133), 48 states have call successors, (48), 16 states have call predecessors, (48), 17 states have return successors, (53), 47 states have call predecessors, (53), 47 states have call successors, (53) [2021-12-06 18:13:48,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 234 transitions. [2021-12-06 18:13:48,881 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 234 transitions. Word has length 117 [2021-12-06 18:13:48,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:13:48,881 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 234 transitions. [2021-12-06 18:13:48,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-06 18:13:48,881 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 234 transitions. [2021-12-06 18:13:48,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-12-06 18:13:48,883 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:13:48,883 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:13:48,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-06 18:13:48,883 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:13:48,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:13:48,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1457718631, now seen corresponding path program 1 times [2021-12-06 18:13:48,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:13:48,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573658031] [2021-12-06 18:13:48,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:13:48,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:13:48,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:49,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:13:49,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:49,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:13:49,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:49,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 18:13:49,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:49,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:13:49,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:49,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 18:13:49,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:49,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 18:13:49,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:49,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 18:13:49,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:49,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:13:49,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:49,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-06 18:13:49,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:49,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-06 18:13:49,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:49,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-06 18:13:49,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:49,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-06 18:13:49,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:49,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-06 18:13:49,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:49,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-06 18:13:49,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:49,168 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-12-06 18:13:49,169 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:13:49,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573658031] [2021-12-06 18:13:49,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573658031] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:13:49,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869079405] [2021-12-06 18:13:49,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:13:49,169 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:13:49,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:13:49,170 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:13:49,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 18:13:49,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:49,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 2704 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 18:13:49,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:13:49,663 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-12-06 18:13:49,664 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:13:49,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869079405] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:13:49,664 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 18:13:49,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2021-12-06 18:13:49,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391074860] [2021-12-06 18:13:49,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:13:49,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 18:13:49,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:13:49,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 18:13:49,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-12-06 18:13:49,666 INFO L87 Difference]: Start difference. First operand 183 states and 234 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-12-06 18:13:49,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:13:49,831 INFO L93 Difference]: Finished difference Result 370 states and 486 transitions. [2021-12-06 18:13:49,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 18:13:49,831 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) Word has length 118 [2021-12-06 18:13:49,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:13:49,832 INFO L225 Difference]: With dead ends: 370 [2021-12-06 18:13:49,833 INFO L226 Difference]: Without dead ends: 201 [2021-12-06 18:13:49,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-12-06 18:13:49,834 INFO L933 BasicCegarLoop]: 223 mSDtfsCounter, 40 mSDsluCounter, 559 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 782 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:13:49,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 782 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 85 Invalid, 0 Unknown, 40 Unchecked, 0.1s Time] [2021-12-06 18:13:49,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-12-06 18:13:49,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 188. [2021-12-06 18:13:49,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 122 states have (on average 1.1475409836065573) internal successors, (140), 124 states have internal predecessors, (140), 48 states have call successors, (48), 16 states have call predecessors, (48), 17 states have return successors, (53), 47 states have call predecessors, (53), 47 states have call successors, (53) [2021-12-06 18:13:49,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 241 transitions. [2021-12-06 18:13:49,845 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 241 transitions. Word has length 118 [2021-12-06 18:13:49,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:13:49,845 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 241 transitions. [2021-12-06 18:13:49,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-12-06 18:13:49,845 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 241 transitions. [2021-12-06 18:13:49,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-12-06 18:13:49,846 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:13:49,846 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:13:49,870 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 18:13:50,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:13:50,047 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:13:50,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:13:50,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1199553193, now seen corresponding path program 1 times [2021-12-06 18:13:50,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:13:50,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701650539] [2021-12-06 18:13:50,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:13:50,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:13:50,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:50,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:13:50,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:50,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:13:50,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:50,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 18:13:50,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:50,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:13:50,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:50,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 18:13:50,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:50,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 18:13:50,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:50,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 18:13:50,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:50,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:13:50,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:50,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-06 18:13:50,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:50,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-06 18:13:50,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:50,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-06 18:13:50,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:50,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-06 18:13:50,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:50,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-06 18:13:50,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:50,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-06 18:13:50,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:50,285 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-12-06 18:13:50,285 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:13:50,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701650539] [2021-12-06 18:13:50,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701650539] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:13:50,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174828210] [2021-12-06 18:13:50,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:13:50,286 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:13:50,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:13:50,286 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:13:50,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 18:13:50,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:50,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 2699 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-06 18:13:50,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:13:50,675 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 18:13:51,236 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 67 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-06 18:13:51,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:13:51,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 34 [2021-12-06 18:13:51,506 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-12-06 18:13:51,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174828210] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:13:51,506 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:13:51,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 13, 11] total 26 [2021-12-06 18:13:51,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513487359] [2021-12-06 18:13:51,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:13:51,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-06 18:13:51,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:13:51,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-06 18:13:51,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2021-12-06 18:13:51,508 INFO L87 Difference]: Start difference. First operand 188 states and 241 transitions. Second operand has 26 states, 24 states have (on average 5.875) internal successors, (141), 22 states have internal predecessors, (141), 10 states have call successors, (37), 5 states have call predecessors, (37), 7 states have return successors, (36), 12 states have call predecessors, (36), 10 states have call successors, (36) [2021-12-06 18:13:52,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:13:52,922 INFO L93 Difference]: Finished difference Result 471 states and 618 transitions. [2021-12-06 18:13:52,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-06 18:13:52,922 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 5.875) internal successors, (141), 22 states have internal predecessors, (141), 10 states have call successors, (37), 5 states have call predecessors, (37), 7 states have return successors, (36), 12 states have call predecessors, (36), 10 states have call successors, (36) Word has length 118 [2021-12-06 18:13:52,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:13:52,925 INFO L225 Difference]: With dead ends: 471 [2021-12-06 18:13:52,925 INFO L226 Difference]: Without dead ends: 309 [2021-12-06 18:13:52,926 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 232 SyntacticMatches, 12 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=143, Invalid=1189, Unknown=0, NotChecked=0, Total=1332 [2021-12-06 18:13:52,926 INFO L933 BasicCegarLoop]: 224 mSDtfsCounter, 253 mSDsluCounter, 1368 mSDsCounter, 0 mSdLazyCounter, 1830 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 1592 SdHoareTripleChecker+Invalid, 2345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 1830 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 330 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:13:52,926 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [293 Valid, 1592 Invalid, 2345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 1830 Invalid, 0 Unknown, 330 Unchecked, 1.2s Time] [2021-12-06 18:13:52,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-12-06 18:13:52,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 228. [2021-12-06 18:13:52,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 153 states have (on average 1.1633986928104576) internal successors, (178), 157 states have internal predecessors, (178), 52 states have call successors, (52), 20 states have call predecessors, (52), 22 states have return successors, (59), 50 states have call predecessors, (59), 51 states have call successors, (59) [2021-12-06 18:13:52,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 289 transitions. [2021-12-06 18:13:52,947 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 289 transitions. Word has length 118 [2021-12-06 18:13:52,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:13:52,947 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 289 transitions. [2021-12-06 18:13:52,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 5.875) internal successors, (141), 22 states have internal predecessors, (141), 10 states have call successors, (37), 5 states have call predecessors, (37), 7 states have return successors, (36), 12 states have call predecessors, (36), 10 states have call successors, (36) [2021-12-06 18:13:52,948 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 289 transitions. [2021-12-06 18:13:52,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-12-06 18:13:52,949 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:13:52,950 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:13:52,972 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-06 18:13:53,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:13:53,151 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:13:53,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:13:53,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1264569920, now seen corresponding path program 1 times [2021-12-06 18:13:53,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:13:53,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6809627] [2021-12-06 18:13:53,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:13:53,154 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:13:53,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:53,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:13:53,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:53,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:13:53,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:53,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 18:13:53,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:53,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:13:53,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:53,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 18:13:53,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:53,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 18:13:53,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:53,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 18:13:53,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:53,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:13:53,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:53,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-06 18:13:53,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:53,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-06 18:13:53,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:53,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-06 18:13:53,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:53,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-06 18:13:53,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:53,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-06 18:13:53,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:53,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-06 18:13:53,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:53,376 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2021-12-06 18:13:53,376 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:13:53,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6809627] [2021-12-06 18:13:53,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6809627] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:13:53,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487578006] [2021-12-06 18:13:53,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:13:53,377 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:13:53,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:13:53,378 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:13:53,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 18:13:53,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:53,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 2713 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 18:13:53,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:13:53,759 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-12-06 18:13:53,760 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:13:53,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487578006] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:13:53,760 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 18:13:53,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 6 [2021-12-06 18:13:53,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856826223] [2021-12-06 18:13:53,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:13:53,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 18:13:53,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:13:53,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 18:13:53,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 18:13:53,761 INFO L87 Difference]: Start difference. First operand 228 states and 289 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-06 18:13:53,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:13:53,787 INFO L93 Difference]: Finished difference Result 451 states and 576 transitions. [2021-12-06 18:13:53,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 18:13:53,788 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 119 [2021-12-06 18:13:53,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:13:53,790 INFO L225 Difference]: With dead ends: 451 [2021-12-06 18:13:53,790 INFO L226 Difference]: Without dead ends: 237 [2021-12-06 18:13:53,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-06 18:13:53,792 INFO L933 BasicCegarLoop]: 230 mSDtfsCounter, 20 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 649 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:13:53,792 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 649 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:13:53,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-12-06 18:13:53,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 224. [2021-12-06 18:13:53,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 150 states have (on average 1.1533333333333333) internal successors, (173), 153 states have internal predecessors, (173), 52 states have call successors, (52), 20 states have call predecessors, (52), 21 states have return successors, (57), 50 states have call predecessors, (57), 51 states have call successors, (57) [2021-12-06 18:13:53,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 282 transitions. [2021-12-06 18:13:53,809 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 282 transitions. Word has length 119 [2021-12-06 18:13:53,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:13:53,809 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 282 transitions. [2021-12-06 18:13:53,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-06 18:13:53,809 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 282 transitions. [2021-12-06 18:13:53,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-06 18:13:53,811 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:13:53,811 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:13:53,834 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-06 18:13:54,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-06 18:13:54,013 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:13:54,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:13:54,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1982077188, now seen corresponding path program 2 times [2021-12-06 18:13:54,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:13:54,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034264241] [2021-12-06 18:13:54,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:13:54,015 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:13:54,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:54,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:13:54,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:54,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:13:54,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:54,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 18:13:54,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:54,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:13:54,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:54,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 18:13:54,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:54,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 18:13:54,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:54,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 18:13:54,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:54,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:13:54,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:54,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-06 18:13:54,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:54,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-06 18:13:54,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:54,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-06 18:13:54,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:54,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-06 18:13:54,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:54,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-06 18:13:54,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:54,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-06 18:13:54,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:54,371 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-12-06 18:13:54,371 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:13:54,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034264241] [2021-12-06 18:13:54,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034264241] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:13:54,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526178432] [2021-12-06 18:13:54,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:13:54,372 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:13:54,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:13:54,372 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:13:54,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-06 18:13:54,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:13:54,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:13:54,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 2725 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-06 18:13:54,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:13:54,863 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-12-06 18:13:54,864 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:13:54,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526178432] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:13:54,864 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 18:13:54,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2021-12-06 18:13:54,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287833699] [2021-12-06 18:13:54,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:13:54,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 18:13:54,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:13:54,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 18:13:54,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2021-12-06 18:13:54,865 INFO L87 Difference]: Start difference. First operand 224 states and 282 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 6 states have internal predecessors, (69), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-06 18:13:54,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:13:54,903 INFO L93 Difference]: Finished difference Result 394 states and 495 transitions. [2021-12-06 18:13:54,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 18:13:54,904 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 6 states have internal predecessors, (69), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) Word has length 123 [2021-12-06 18:13:54,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:13:54,906 INFO L225 Difference]: With dead ends: 394 [2021-12-06 18:13:54,906 INFO L226 Difference]: Without dead ends: 229 [2021-12-06 18:13:54,907 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-12-06 18:13:54,908 INFO L933 BasicCegarLoop]: 225 mSDtfsCounter, 10 mSDsluCounter, 1098 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 1323 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:13:54,908 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 1323 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:13:54,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-12-06 18:13:54,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 229. [2021-12-06 18:13:54,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 154 states have (on average 1.1493506493506493) internal successors, (177), 158 states have internal predecessors, (177), 52 states have call successors, (52), 20 states have call predecessors, (52), 22 states have return successors, (62), 50 states have call predecessors, (62), 51 states have call successors, (62) [2021-12-06 18:13:54,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 291 transitions. [2021-12-06 18:13:54,925 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 291 transitions. Word has length 123 [2021-12-06 18:13:54,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:13:54,925 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 291 transitions. [2021-12-06 18:13:54,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 6 states have internal predecessors, (69), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-06 18:13:54,925 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 291 transitions. [2021-12-06 18:13:54,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-12-06 18:13:54,926 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:13:54,926 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:13:54,962 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-06 18:13:55,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:13:55,127 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:13:55,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:13:55,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1351230667, now seen corresponding path program 1 times [2021-12-06 18:13:55,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:13:55,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052992053] [2021-12-06 18:13:55,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:13:55,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:13:55,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:55,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:13:55,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:55,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:13:55,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:55,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 18:13:55,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:55,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:13:55,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:55,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 18:13:55,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:55,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 18:13:55,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:55,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 18:13:55,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:55,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:13:55,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:55,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-06 18:13:55,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:55,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-06 18:13:55,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:55,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-06 18:13:55,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:55,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-06 18:13:55,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:55,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-06 18:13:55,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:55,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-06 18:13:55,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:55,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-12-06 18:13:55,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:55,441 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2021-12-06 18:13:55,441 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:13:55,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052992053] [2021-12-06 18:13:55,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052992053] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:13:55,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527102924] [2021-12-06 18:13:55,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:13:55,442 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:13:55,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:13:55,443 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:13:55,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-06 18:13:55,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:55,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 2763 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-06 18:13:55,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:13:55,791 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 6 treesize of output 5 [2021-12-06 18:13:56,145 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 17 treesize of output 9 [2021-12-06 18:13:56,214 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-06 18:13:56,214 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:13:56,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527102924] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:13:56,214 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 18:13:56,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [8] total 17 [2021-12-06 18:13:56,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952769899] [2021-12-06 18:13:56,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:13:56,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-06 18:13:56,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:13:56,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-06 18:13:56,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-12-06 18:13:56,215 INFO L87 Difference]: Start difference. First operand 229 states and 291 transitions. Second operand has 11 states, 11 states have (on average 6.636363636363637) internal successors, (73), 11 states have internal predecessors, (73), 6 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2021-12-06 18:13:56,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:13:56,903 INFO L93 Difference]: Finished difference Result 524 states and 702 transitions. [2021-12-06 18:13:56,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 18:13:56,903 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.636363636363637) internal successors, (73), 11 states have internal predecessors, (73), 6 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) Word has length 126 [2021-12-06 18:13:56,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:13:56,905 INFO L225 Difference]: With dead ends: 524 [2021-12-06 18:13:56,905 INFO L226 Difference]: Without dead ends: 347 [2021-12-06 18:13:56,906 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 141 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-12-06 18:13:56,907 INFO L933 BasicCegarLoop]: 288 mSDtfsCounter, 212 mSDsluCounter, 2015 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 2303 SdHoareTripleChecker+Invalid, 723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 18:13:56,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 2303 Invalid, 723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 577 Invalid, 0 Unknown, 77 Unchecked, 0.5s Time] [2021-12-06 18:13:56,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-12-06 18:13:56,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 267. [2021-12-06 18:13:56,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 182 states have (on average 1.1373626373626373) internal successors, (207), 188 states have internal predecessors, (207), 56 states have call successors, (56), 23 states have call predecessors, (56), 28 states have return successors, (79), 55 states have call predecessors, (79), 55 states have call successors, (79) [2021-12-06 18:13:56,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 342 transitions. [2021-12-06 18:13:56,923 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 342 transitions. Word has length 126 [2021-12-06 18:13:56,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:13:56,923 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 342 transitions. [2021-12-06 18:13:56,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.636363636363637) internal successors, (73), 11 states have internal predecessors, (73), 6 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2021-12-06 18:13:56,923 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 342 transitions. [2021-12-06 18:13:56,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-12-06 18:13:56,924 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:13:56,924 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:13:56,959 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-06 18:13:57,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-06 18:13:57,125 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:13:57,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:13:57,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1989755287, now seen corresponding path program 1 times [2021-12-06 18:13:57,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:13:57,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433756360] [2021-12-06 18:13:57,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:13:57,126 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:13:57,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:57,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:13:57,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:57,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:13:57,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:57,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 18:13:57,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:57,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:13:57,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:57,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 18:13:57,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:57,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 18:13:57,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:57,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 18:13:57,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:57,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:13:57,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:57,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-06 18:13:57,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:57,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-06 18:13:57,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:57,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-06 18:13:57,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:57,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-06 18:13:57,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:57,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-06 18:13:57,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:57,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-06 18:13:57,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:57,352 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-12-06 18:13:57,352 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:13:57,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433756360] [2021-12-06 18:13:57,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433756360] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:13:57,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630038755] [2021-12-06 18:13:57,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:13:57,353 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:13:57,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:13:57,353 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:13:57,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-06 18:13:57,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:57,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 2730 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 18:13:57,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:13:57,750 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-12-06 18:13:57,751 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:13:57,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630038755] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:13:57,751 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 18:13:57,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 6 [2021-12-06 18:13:57,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042386789] [2021-12-06 18:13:57,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:13:57,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 18:13:57,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:13:57,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 18:13:57,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 18:13:57,752 INFO L87 Difference]: Start difference. First operand 267 states and 342 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-06 18:13:57,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:13:57,775 INFO L93 Difference]: Finished difference Result 518 states and 665 transitions. [2021-12-06 18:13:57,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 18:13:57,776 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 125 [2021-12-06 18:13:57,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:13:57,778 INFO L225 Difference]: With dead ends: 518 [2021-12-06 18:13:57,779 INFO L226 Difference]: Without dead ends: 265 [2021-12-06 18:13:57,780 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-06 18:13:57,781 INFO L933 BasicCegarLoop]: 218 mSDtfsCounter, 9 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 645 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:13:57,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 645 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:13:57,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-12-06 18:13:57,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 262. [2021-12-06 18:13:57,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 178 states have (on average 1.1292134831460674) internal successors, (201), 183 states have internal predecessors, (201), 56 states have call successors, (56), 23 states have call predecessors, (56), 27 states have return successors, (72), 55 states have call predecessors, (72), 55 states have call successors, (72) [2021-12-06 18:13:57,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 329 transitions. [2021-12-06 18:13:57,800 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 329 transitions. Word has length 125 [2021-12-06 18:13:57,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:13:57,800 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 329 transitions. [2021-12-06 18:13:57,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-06 18:13:57,801 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 329 transitions. [2021-12-06 18:13:57,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-12-06 18:13:57,802 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:13:57,802 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:13:57,825 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-06 18:13:58,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-06 18:13:58,003 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:13:58,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:13:58,003 INFO L85 PathProgramCache]: Analyzing trace with hash 44113837, now seen corresponding path program 1 times [2021-12-06 18:13:58,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:13:58,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914258316] [2021-12-06 18:13:58,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:13:58,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:13:58,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:58,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:13:58,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:58,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:13:58,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:58,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 18:13:58,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:58,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:13:58,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:58,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 18:13:58,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:58,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 18:13:58,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:58,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 18:13:58,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:58,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:13:58,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:58,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-06 18:13:58,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:58,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-06 18:13:58,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:58,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-06 18:13:58,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:58,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-06 18:13:58,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:58,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-06 18:13:58,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:58,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-06 18:13:58,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:58,224 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-12-06 18:13:58,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:13:58,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914258316] [2021-12-06 18:13:58,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914258316] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:13:58,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318202461] [2021-12-06 18:13:58,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:13:58,225 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:13:58,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:13:58,226 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:13:58,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-06 18:13:58,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:58,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 2732 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 18:13:58,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:13:58,583 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-12-06 18:13:58,583 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:13:58,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318202461] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:13:58,583 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 18:13:58,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 6 [2021-12-06 18:13:58,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920476510] [2021-12-06 18:13:58,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:13:58,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 18:13:58,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:13:58,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 18:13:58,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 18:13:58,584 INFO L87 Difference]: Start difference. First operand 262 states and 329 transitions. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-06 18:13:58,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:13:58,604 INFO L93 Difference]: Finished difference Result 488 states and 627 transitions. [2021-12-06 18:13:58,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 18:13:58,605 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 125 [2021-12-06 18:13:58,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:13:58,606 INFO L225 Difference]: With dead ends: 488 [2021-12-06 18:13:58,606 INFO L226 Difference]: Without dead ends: 259 [2021-12-06 18:13:58,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-06 18:13:58,608 INFO L933 BasicCegarLoop]: 233 mSDtfsCounter, 26 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 657 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:13:58,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 657 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:13:58,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-12-06 18:13:58,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 252. [2021-12-06 18:13:58,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 169 states have (on average 1.1124260355029585) internal successors, (188), 173 states have internal predecessors, (188), 56 states have call successors, (56), 23 states have call predecessors, (56), 26 states have return successors, (71), 55 states have call predecessors, (71), 55 states have call successors, (71) [2021-12-06 18:13:58,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 315 transitions. [2021-12-06 18:13:58,619 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 315 transitions. Word has length 125 [2021-12-06 18:13:58,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:13:58,620 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 315 transitions. [2021-12-06 18:13:58,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-06 18:13:58,620 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 315 transitions. [2021-12-06 18:13:58,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-12-06 18:13:58,621 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:13:58,621 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:13:58,643 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-06 18:13:58,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-06 18:13:58,822 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:13:58,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:13:58,822 INFO L85 PathProgramCache]: Analyzing trace with hash -308974545, now seen corresponding path program 1 times [2021-12-06 18:13:58,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:13:58,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179243807] [2021-12-06 18:13:58,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:13:58,823 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:13:58,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:58,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:13:58,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:58,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:13:58,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:58,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 18:13:58,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:58,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:13:58,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:58,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 18:13:58,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:58,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 18:13:58,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:58,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 18:13:58,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:58,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:13:58,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:58,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-06 18:13:58,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:58,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-06 18:13:58,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:58,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-06 18:13:58,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:58,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-06 18:13:58,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:59,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-06 18:13:59,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:59,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-06 18:13:59,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:59,100 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-12-06 18:13:59,100 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:13:59,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179243807] [2021-12-06 18:13:59,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179243807] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:13:59,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913757267] [2021-12-06 18:13:59,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:13:59,101 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:13:59,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:13:59,102 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:13:59,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-06 18:13:59,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:59,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 2727 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-06 18:13:59,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:13:59,509 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 18:13:59,737 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-12-06 18:13:59,737 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:13:59,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913757267] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:13:59,737 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 18:13:59,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [8] total 18 [2021-12-06 18:13:59,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181368859] [2021-12-06 18:13:59,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:13:59,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-06 18:13:59,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:13:59,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-06 18:13:59,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-12-06 18:13:59,738 INFO L87 Difference]: Start difference. First operand 252 states and 315 transitions. Second operand has 12 states, 12 states have (on average 6.083333333333333) internal successors, (73), 10 states have internal predecessors, (73), 5 states have call successors, (15), 3 states have call predecessors, (15), 4 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-12-06 18:13:59,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:13:59,967 INFO L93 Difference]: Finished difference Result 490 states and 603 transitions. [2021-12-06 18:13:59,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-06 18:13:59,968 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.083333333333333) internal successors, (73), 10 states have internal predecessors, (73), 5 states have call successors, (15), 3 states have call predecessors, (15), 4 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 125 [2021-12-06 18:13:59,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:13:59,970 INFO L225 Difference]: With dead ends: 490 [2021-12-06 18:13:59,970 INFO L226 Difference]: Without dead ends: 262 [2021-12-06 18:13:59,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-12-06 18:13:59,972 INFO L933 BasicCegarLoop]: 211 mSDtfsCounter, 66 mSDsluCounter, 1547 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 1758 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 238 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:13:59,972 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 1758 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 135 Invalid, 0 Unknown, 238 Unchecked, 0.2s Time] [2021-12-06 18:13:59,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-12-06 18:13:59,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 251. [2021-12-06 18:13:59,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 169 states have (on average 1.106508875739645) internal successors, (187), 171 states have internal predecessors, (187), 56 states have call successors, (56), 24 states have call predecessors, (56), 25 states have return successors, (70), 55 states have call predecessors, (70), 55 states have call successors, (70) [2021-12-06 18:13:59,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 313 transitions. [2021-12-06 18:13:59,990 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 313 transitions. Word has length 125 [2021-12-06 18:13:59,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:13:59,990 INFO L470 AbstractCegarLoop]: Abstraction has 251 states and 313 transitions. [2021-12-06 18:13:59,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.083333333333333) internal successors, (73), 10 states have internal predecessors, (73), 5 states have call successors, (15), 3 states have call predecessors, (15), 4 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-12-06 18:13:59,990 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 313 transitions. [2021-12-06 18:13:59,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-12-06 18:13:59,991 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:13:59,991 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:14:00,028 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-06 18:14:00,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-06 18:14:00,192 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:14:00,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:14:00,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1074387317, now seen corresponding path program 1 times [2021-12-06 18:14:00,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:14:00,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783110335] [2021-12-06 18:14:00,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:14:00,193 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:14:00,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:00,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:14:00,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:00,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:14:00,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:00,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 18:14:00,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:00,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:14:00,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:00,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 18:14:00,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:00,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-06 18:14:00,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:00,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-06 18:14:00,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:00,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:14:00,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:00,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-06 18:14:00,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:00,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-06 18:14:00,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:00,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-06 18:14:00,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:00,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-06 18:14:00,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:00,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-06 18:14:00,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:00,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-06 18:14:00,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:00,531 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-12-06 18:14:00,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:14:00,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783110335] [2021-12-06 18:14:00,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783110335] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:14:00,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598228947] [2021-12-06 18:14:00,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:14:00,532 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:14:00,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:14:00,535 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:14:00,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-06 18:14:00,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:00,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 2734 conjuncts, 50 conjunts are in the unsatisfiable core [2021-12-06 18:14:00,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:14:00,886 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 18:14:01,477 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 69 proven. 13 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-06 18:14:01,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:14:01,846 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-12-06 18:14:01,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598228947] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:14:01,846 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:14:01,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 14, 10] total 27 [2021-12-06 18:14:01,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977532999] [2021-12-06 18:14:01,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:14:01,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-06 18:14:01,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:14:01,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-06 18:14:01,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2021-12-06 18:14:01,848 INFO L87 Difference]: Start difference. First operand 251 states and 313 transitions. Second operand has 27 states, 24 states have (on average 6.833333333333333) internal successors, (164), 25 states have internal predecessors, (164), 10 states have call successors, (35), 5 states have call predecessors, (35), 7 states have return successors, (34), 9 states have call predecessors, (34), 10 states have call successors, (34) [2021-12-06 18:14:04,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:14:04,201 INFO L93 Difference]: Finished difference Result 601 states and 788 transitions. [2021-12-06 18:14:04,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-06 18:14:04,202 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 6.833333333333333) internal successors, (164), 25 states have internal predecessors, (164), 10 states have call successors, (35), 5 states have call predecessors, (35), 7 states have return successors, (34), 9 states have call predecessors, (34), 10 states have call successors, (34) Word has length 129 [2021-12-06 18:14:04,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:14:04,204 INFO L225 Difference]: With dead ends: 601 [2021-12-06 18:14:04,204 INFO L226 Difference]: Without dead ends: 341 [2021-12-06 18:14:04,205 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 259 SyntacticMatches, 11 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=309, Invalid=1947, Unknown=0, NotChecked=0, Total=2256 [2021-12-06 18:14:04,205 INFO L933 BasicCegarLoop]: 259 mSDtfsCounter, 348 mSDsluCounter, 2127 mSDsCounter, 0 mSdLazyCounter, 3338 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 410 SdHoareTripleChecker+Valid, 2386 SdHoareTripleChecker+Invalid, 4598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 3338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1066 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-06 18:14:04,206 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [410 Valid, 2386 Invalid, 4598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 3338 Invalid, 0 Unknown, 1066 Unchecked, 1.8s Time] [2021-12-06 18:14:04,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2021-12-06 18:14:04,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 255. [2021-12-06 18:14:04,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 172 states have (on average 1.0930232558139534) internal successors, (188), 175 states have internal predecessors, (188), 56 states have call successors, (56), 24 states have call predecessors, (56), 26 states have return successors, (74), 55 states have call predecessors, (74), 55 states have call successors, (74) [2021-12-06 18:14:04,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 318 transitions. [2021-12-06 18:14:04,219 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 318 transitions. Word has length 129 [2021-12-06 18:14:04,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:14:04,219 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 318 transitions. [2021-12-06 18:14:04,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 6.833333333333333) internal successors, (164), 25 states have internal predecessors, (164), 10 states have call successors, (35), 5 states have call predecessors, (35), 7 states have return successors, (34), 9 states have call predecessors, (34), 10 states have call successors, (34) [2021-12-06 18:14:04,219 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 318 transitions. [2021-12-06 18:14:04,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-12-06 18:14:04,220 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:14:04,220 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:14:04,243 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-06 18:14:04,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:14:04,421 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:14:04,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:14:04,421 INFO L85 PathProgramCache]: Analyzing trace with hash -564182680, now seen corresponding path program 1 times [2021-12-06 18:14:04,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:14:04,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547212465] [2021-12-06 18:14:04,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:14:04,421 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:14:04,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:04,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:14:04,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:04,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:14:04,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:04,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 18:14:04,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:04,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:14:04,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:04,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 18:14:04,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:04,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-06 18:14:04,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:04,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-06 18:14:04,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:04,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:14:04,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:04,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-06 18:14:04,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:04,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-06 18:14:04,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:04,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-06 18:14:04,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:04,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-06 18:14:04,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:04,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-06 18:14:04,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:04,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-06 18:14:04,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:04,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-06 18:14:04,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:04,676 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-12-06 18:14:04,676 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:14:04,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547212465] [2021-12-06 18:14:04,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547212465] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:14:04,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827327427] [2021-12-06 18:14:04,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:14:04,677 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:14:04,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:14:04,677 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:14:04,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-06 18:14:04,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:04,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 2784 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-06 18:14:04,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:14:05,091 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-12-06 18:14:05,091 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:14:05,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827327427] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:14:05,091 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 18:14:05,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 16 [2021-12-06 18:14:05,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416469629] [2021-12-06 18:14:05,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:14:05,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 18:14:05,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:14:05,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 18:14:05,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-12-06 18:14:05,092 INFO L87 Difference]: Start difference. First operand 255 states and 318 transitions. Second operand has 9 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 3 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-12-06 18:14:05,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:14:05,197 INFO L93 Difference]: Finished difference Result 476 states and 591 transitions. [2021-12-06 18:14:05,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 18:14:05,197 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 3 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 131 [2021-12-06 18:14:05,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:14:05,199 INFO L225 Difference]: With dead ends: 476 [2021-12-06 18:14:05,199 INFO L226 Difference]: Without dead ends: 234 [2021-12-06 18:14:05,200 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-12-06 18:14:05,200 INFO L933 BasicCegarLoop]: 207 mSDtfsCounter, 12 mSDsluCounter, 1403 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1610 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:14:05,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 1610 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 18:14:05,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-12-06 18:14:05,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 218. [2021-12-06 18:14:05,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 144 states have (on average 1.1041666666666667) internal successors, (159), 147 states have internal predecessors, (159), 52 states have call successors, (52), 20 states have call predecessors, (52), 21 states have return successors, (60), 50 states have call predecessors, (60), 51 states have call successors, (60) [2021-12-06 18:14:05,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 271 transitions. [2021-12-06 18:14:05,210 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 271 transitions. Word has length 131 [2021-12-06 18:14:05,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:14:05,210 INFO L470 AbstractCegarLoop]: Abstraction has 218 states and 271 transitions. [2021-12-06 18:14:05,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 3 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-12-06 18:14:05,211 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 271 transitions. [2021-12-06 18:14:05,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-12-06 18:14:05,211 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:14:05,212 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:14:05,234 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-12-06 18:14:05,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-06 18:14:05,413 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:14:05,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:14:05,414 INFO L85 PathProgramCache]: Analyzing trace with hash 418439313, now seen corresponding path program 1 times [2021-12-06 18:14:05,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:14:05,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492424723] [2021-12-06 18:14:05,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:14:05,415 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:14:05,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:05,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:14:05,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:05,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:14:05,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:05,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 18:14:05,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:05,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:14:05,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:05,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 18:14:05,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:05,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 18:14:05,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:05,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 18:14:05,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:05,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:14:05,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:05,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-06 18:14:05,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:05,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 18:14:05,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:05,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-06 18:14:05,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:05,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-06 18:14:05,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:05,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-06 18:14:05,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:05,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-06 18:14:05,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:05,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-12-06 18:14:05,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:05,704 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-12-06 18:14:05,704 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:14:05,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492424723] [2021-12-06 18:14:05,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492424723] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:14:05,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127098503] [2021-12-06 18:14:05,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:14:05,705 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:14:05,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:14:05,706 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:14:05,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-06 18:14:06,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:06,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 2791 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-06 18:14:06,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:14:06,054 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 6 treesize of output 5 [2021-12-06 18:14:06,322 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 17 treesize of output 9 [2021-12-06 18:14:06,372 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-12-06 18:14:06,372 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:14:06,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127098503] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:14:06,372 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 18:14:06,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [9] total 17 [2021-12-06 18:14:06,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373559055] [2021-12-06 18:14:06,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:14:06,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 18:14:06,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:14:06,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 18:14:06,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-12-06 18:14:06,374 INFO L87 Difference]: Start difference. First operand 218 states and 271 transitions. Second operand has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 6 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2021-12-06 18:14:06,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:14:06,741 INFO L93 Difference]: Finished difference Result 475 states and 617 transitions. [2021-12-06 18:14:06,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-06 18:14:06,741 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 6 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) Word has length 133 [2021-12-06 18:14:06,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:14:06,743 INFO L225 Difference]: With dead ends: 475 [2021-12-06 18:14:06,743 INFO L226 Difference]: Without dead ends: 297 [2021-12-06 18:14:06,744 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 148 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-12-06 18:14:06,744 INFO L933 BasicCegarLoop]: 279 mSDtfsCounter, 177 mSDsluCounter, 1410 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1689 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 18:14:06,745 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 1689 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 334 Invalid, 0 Unknown, 63 Unchecked, 0.3s Time] [2021-12-06 18:14:06,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-12-06 18:14:06,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 243. [2021-12-06 18:14:06,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 161 states have (on average 1.093167701863354) internal successors, (176), 164 states have internal predecessors, (176), 56 states have call successors, (56), 23 states have call predecessors, (56), 25 states have return successors, (71), 55 states have call predecessors, (71), 55 states have call successors, (71) [2021-12-06 18:14:06,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 303 transitions. [2021-12-06 18:14:06,756 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 303 transitions. Word has length 133 [2021-12-06 18:14:06,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:14:06,756 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 303 transitions. [2021-12-06 18:14:06,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 6 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2021-12-06 18:14:06,757 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 303 transitions. [2021-12-06 18:14:06,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-12-06 18:14:06,757 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:14:06,758 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:14:06,780 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-12-06 18:14:06,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-06 18:14:06,959 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:14:06,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:14:06,960 INFO L85 PathProgramCache]: Analyzing trace with hash 46159829, now seen corresponding path program 2 times [2021-12-06 18:14:06,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:14:06,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054360115] [2021-12-06 18:14:06,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:14:06,962 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:14:07,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:07,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:14:07,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:07,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:14:07,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:07,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 18:14:07,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:07,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:14:07,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:07,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 18:14:07,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:07,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 18:14:07,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:07,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 18:14:07,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:07,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:14:07,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:07,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-06 18:14:07,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:07,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 18:14:07,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:07,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-06 18:14:07,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:07,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-06 18:14:07,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:07,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-06 18:14:07,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:07,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-12-06 18:14:07,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:07,250 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-12-06 18:14:07,250 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:14:07,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054360115] [2021-12-06 18:14:07,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054360115] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:14:07,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704453560] [2021-12-06 18:14:07,251 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:14:07,251 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:14:07,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:14:07,253 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:14:07,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-06 18:14:07,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:14:07,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:14:07,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 2755 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-06 18:14:07,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:14:07,683 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 18:14:08,104 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 16 treesize of output 8 [2021-12-06 18:14:08,133 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 65 proven. 2 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-12-06 18:14:08,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:14:08,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 34 [2021-12-06 18:14:08,285 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-12-06 18:14:08,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704453560] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:14:08,285 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:14:08,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 8] total 21 [2021-12-06 18:14:08,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142860617] [2021-12-06 18:14:08,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:14:08,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-06 18:14:08,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:14:08,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-06 18:14:08,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-12-06 18:14:08,287 INFO L87 Difference]: Start difference. First operand 243 states and 303 transitions. Second operand has 21 states, 21 states have (on average 6.523809523809524) internal successors, (137), 17 states have internal predecessors, (137), 10 states have call successors, (37), 5 states have call predecessors, (37), 5 states have return successors, (36), 12 states have call predecessors, (36), 10 states have call successors, (36) [2021-12-06 18:14:09,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:14:09,486 INFO L93 Difference]: Finished difference Result 422 states and 519 transitions. [2021-12-06 18:14:09,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-06 18:14:09,487 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 6.523809523809524) internal successors, (137), 17 states have internal predecessors, (137), 10 states have call successors, (37), 5 states have call predecessors, (37), 5 states have return successors, (36), 12 states have call predecessors, (36), 10 states have call successors, (36) Word has length 132 [2021-12-06 18:14:09,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:14:09,488 INFO L225 Difference]: With dead ends: 422 [2021-12-06 18:14:09,488 INFO L226 Difference]: Without dead ends: 303 [2021-12-06 18:14:09,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 266 SyntacticMatches, 13 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=138, Invalid=1122, Unknown=0, NotChecked=0, Total=1260 [2021-12-06 18:14:09,490 INFO L933 BasicCegarLoop]: 208 mSDtfsCounter, 182 mSDsluCounter, 1441 mSDsCounter, 0 mSdLazyCounter, 1476 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 1649 SdHoareTripleChecker+Invalid, 1919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 1476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 286 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:14:09,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 1649 Invalid, 1919 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 1476 Invalid, 0 Unknown, 286 Unchecked, 1.0s Time] [2021-12-06 18:14:09,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-12-06 18:14:09,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 273. [2021-12-06 18:14:09,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 186 states have (on average 1.086021505376344) internal successors, (202), 189 states have internal predecessors, (202), 59 states have call successors, (59), 25 states have call predecessors, (59), 27 states have return successors, (75), 58 states have call predecessors, (75), 58 states have call successors, (75) [2021-12-06 18:14:09,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 336 transitions. [2021-12-06 18:14:09,503 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 336 transitions. Word has length 132 [2021-12-06 18:14:09,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:14:09,503 INFO L470 AbstractCegarLoop]: Abstraction has 273 states and 336 transitions. [2021-12-06 18:14:09,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 6.523809523809524) internal successors, (137), 17 states have internal predecessors, (137), 10 states have call successors, (37), 5 states have call predecessors, (37), 5 states have return successors, (36), 12 states have call predecessors, (36), 10 states have call successors, (36) [2021-12-06 18:14:09,503 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 336 transitions. [2021-12-06 18:14:09,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-06 18:14:09,504 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:14:09,504 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:14:09,527 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-12-06 18:14:09,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:14:09,706 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:14:09,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:14:09,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1597647870, now seen corresponding path program 1 times [2021-12-06 18:14:09,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:14:09,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741748077] [2021-12-06 18:14:09,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:14:09,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:14:09,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:09,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:14:09,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:09,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:14:09,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:09,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 18:14:09,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:09,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:14:09,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:09,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 18:14:09,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:09,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 18:14:09,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:09,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 18:14:09,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:09,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:14:09,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:09,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-06 18:14:09,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:09,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 18:14:09,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:09,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-06 18:14:09,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:09,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-06 18:14:09,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:09,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-06 18:14:09,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:09,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-06 18:14:09,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:10,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-06 18:14:10,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:10,021 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-12-06 18:14:10,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:14:10,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741748077] [2021-12-06 18:14:10,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741748077] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:14:10,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119995357] [2021-12-06 18:14:10,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:14:10,022 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:14:10,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:14:10,023 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:14:10,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-06 18:14:10,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:10,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 2815 conjuncts, 56 conjunts are in the unsatisfiable core [2021-12-06 18:14:10,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:14:10,339 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 18:14:10,498 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-06 18:14:10,498 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 18:14:10,525 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 18:14:10,765 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-06 18:14:10,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 18:14:18,941 INFO L354 Elim1Store]: treesize reduction 46, result has 40.3 percent of original size [2021-12-06 18:14:18,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 42 [2021-12-06 18:14:19,346 INFO L354 Elim1Store]: treesize reduction 8, result has 78.4 percent of original size [2021-12-06 18:14:19,346 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 53 treesize of output 67 [2021-12-06 18:14:19,409 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 18:14:21,486 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 18:14:27,736 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 16 treesize of output 8 [2021-12-06 18:14:27,771 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 53 proven. 49 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-06 18:14:27,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:14:27,845 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2121 (Array Int Int))) (not (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_save_byte_from_array_~storage#1.base| v_ArrVal_2121) |c_ULTIMATE.start_aws_byte_buf_init_copy_harness_~#src~0#1.base|) (+ |c_ULTIMATE.start_aws_byte_buf_init_copy_harness_~#src~0#1.offset| 8)) 0))) is different from false [2021-12-06 18:14:27,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119995357] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:14:27,849 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:14:27,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 19] total 27 [2021-12-06 18:14:27,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851506684] [2021-12-06 18:14:27,849 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:14:27,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-06 18:14:27,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:14:27,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-06 18:14:27,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=717, Unknown=4, NotChecked=54, Total=870 [2021-12-06 18:14:27,851 INFO L87 Difference]: Start difference. First operand 273 states and 336 transitions. Second operand has 27 states, 27 states have (on average 5.333333333333333) internal successors, (144), 24 states have internal predecessors, (144), 10 states have call successors, (30), 10 states have call predecessors, (30), 9 states have return successors, (29), 11 states have call predecessors, (29), 10 states have call successors, (29) [2021-12-06 18:14:33,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:14:33,640 INFO L93 Difference]: Finished difference Result 491 states and 578 transitions. [2021-12-06 18:14:33,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-06 18:14:33,641 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.333333333333333) internal successors, (144), 24 states have internal predecessors, (144), 10 states have call successors, (30), 10 states have call predecessors, (30), 9 states have return successors, (29), 11 states have call predecessors, (29), 10 states have call successors, (29) Word has length 134 [2021-12-06 18:14:33,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:14:33,642 INFO L225 Difference]: With dead ends: 491 [2021-12-06 18:14:33,642 INFO L226 Difference]: Without dead ends: 366 [2021-12-06 18:14:33,643 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 194 SyntacticMatches, 18 SemanticMatches, 43 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 21.8s TimeCoverageRelationStatistics Valid=211, Invalid=1680, Unknown=5, NotChecked=84, Total=1980 [2021-12-06 18:14:33,644 INFO L933 BasicCegarLoop]: 209 mSDtfsCounter, 243 mSDsluCounter, 1474 mSDsCounter, 0 mSdLazyCounter, 1298 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 1683 SdHoareTripleChecker+Invalid, 2107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 1298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 670 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 18:14:33,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 1683 Invalid, 2107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 1298 Invalid, 0 Unknown, 670 Unchecked, 0.8s Time] [2021-12-06 18:14:33,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-12-06 18:14:33,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 341. [2021-12-06 18:14:33,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 245 states have (on average 1.0775510204081633) internal successors, (264), 249 states have internal predecessors, (264), 59 states have call successors, (59), 33 states have call predecessors, (59), 36 states have return successors, (74), 58 states have call predecessors, (74), 58 states have call successors, (74) [2021-12-06 18:14:33,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 397 transitions. [2021-12-06 18:14:33,658 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 397 transitions. Word has length 134 [2021-12-06 18:14:33,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:14:33,658 INFO L470 AbstractCegarLoop]: Abstraction has 341 states and 397 transitions. [2021-12-06 18:14:33,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 5.333333333333333) internal successors, (144), 24 states have internal predecessors, (144), 10 states have call successors, (30), 10 states have call predecessors, (30), 9 states have return successors, (29), 11 states have call predecessors, (29), 10 states have call successors, (29) [2021-12-06 18:14:33,658 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 397 transitions. [2021-12-06 18:14:33,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-12-06 18:14:33,659 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:14:33,659 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:14:33,682 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-12-06 18:14:33,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:14:33,861 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:14:33,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:14:33,862 INFO L85 PathProgramCache]: Analyzing trace with hash -2053572832, now seen corresponding path program 1 times [2021-12-06 18:14:33,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:14:33,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840027688] [2021-12-06 18:14:33,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:14:33,863 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:14:33,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:34,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:14:34,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:34,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:14:34,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:34,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 18:14:34,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:34,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:14:34,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:34,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 18:14:34,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:34,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 18:14:34,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:34,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 18:14:34,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:34,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:14:34,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:34,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-06 18:14:34,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:34,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 18:14:34,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:34,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-06 18:14:34,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:34,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-06 18:14:34,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:34,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-06 18:14:34,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:34,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-12-06 18:14:34,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:34,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-12-06 18:14:34,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:34,170 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-12-06 18:14:34,170 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:14:34,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840027688] [2021-12-06 18:14:34,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840027688] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:14:34,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370306567] [2021-12-06 18:14:34,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:14:34,170 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:14:34,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:14:34,171 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:14:34,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-06 18:14:34,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:34,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 2848 conjuncts, 57 conjunts are in the unsatisfiable core [2021-12-06 18:14:34,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:14:34,917 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 18:14:34,919 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 18:14:34,964 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-12-06 18:14:34,965 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:14:34,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370306567] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:14:34,965 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 18:14:34,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [11] total 22 [2021-12-06 18:14:34,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618940955] [2021-12-06 18:14:34,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:14:34,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-06 18:14:34,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:14:34,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-06 18:14:34,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=415, Unknown=0, NotChecked=0, Total=462 [2021-12-06 18:14:34,966 INFO L87 Difference]: Start difference. First operand 341 states and 397 transitions. Second operand has 13 states, 12 states have (on average 7.083333333333333) internal successors, (85), 12 states have internal predecessors, (85), 4 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2021-12-06 18:14:35,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:14:35,699 INFO L93 Difference]: Finished difference Result 438 states and 512 transitions. [2021-12-06 18:14:35,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-06 18:14:35,700 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 7.083333333333333) internal successors, (85), 12 states have internal predecessors, (85), 4 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) Word has length 141 [2021-12-06 18:14:35,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:14:35,701 INFO L225 Difference]: With dead ends: 438 [2021-12-06 18:14:35,701 INFO L226 Difference]: Without dead ends: 324 [2021-12-06 18:14:35,702 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=103, Invalid=827, Unknown=0, NotChecked=0, Total=930 [2021-12-06 18:14:35,702 INFO L933 BasicCegarLoop]: 183 mSDtfsCounter, 73 mSDsluCounter, 1472 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 1655 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 18:14:35,703 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 1655 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 18:14:35,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2021-12-06 18:14:35,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 312. [2021-12-06 18:14:35,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 223 states have (on average 1.0762331838565022) internal successors, (240), 227 states have internal predecessors, (240), 55 states have call successors, (55), 31 states have call predecessors, (55), 33 states have return successors, (64), 53 states have call predecessors, (64), 54 states have call successors, (64) [2021-12-06 18:14:35,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 359 transitions. [2021-12-06 18:14:35,715 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 359 transitions. Word has length 141 [2021-12-06 18:14:35,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:14:35,715 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 359 transitions. [2021-12-06 18:14:35,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 7.083333333333333) internal successors, (85), 12 states have internal predecessors, (85), 4 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2021-12-06 18:14:35,716 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 359 transitions. [2021-12-06 18:14:35,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-12-06 18:14:35,717 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:14:35,717 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:14:35,740 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-12-06 18:14:35,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-12-06 18:14:35,918 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:14:35,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:14:35,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1894197416, now seen corresponding path program 1 times [2021-12-06 18:14:35,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:14:35,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779858212] [2021-12-06 18:14:35,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:14:35,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:14:35,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:36,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:14:36,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:36,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:14:36,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:36,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 18:14:36,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:36,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:14:36,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:36,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 18:14:36,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:36,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 18:14:36,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:36,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 18:14:36,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:36,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:14:36,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:36,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-06 18:14:36,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:36,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 18:14:36,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:36,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-06 18:14:36,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:36,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-06 18:14:36,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:36,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-06 18:14:36,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:36,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:14:36,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:36,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:14:36,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:36,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 18:14:36,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:36,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 18:14:36,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:36,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-06 18:14:36,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:36,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:14:36,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:36,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-12-06 18:14:36,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:36,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:14:36,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:36,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:14:36,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:36,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 18:14:36,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:36,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-06 18:14:36,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:36,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2021-12-06 18:14:36,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:36,221 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 270 trivial. 0 not checked. [2021-12-06 18:14:36,221 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:14:36,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779858212] [2021-12-06 18:14:36,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779858212] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:14:36,221 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:14:36,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-06 18:14:36,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901207746] [2021-12-06 18:14:36,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:14:36,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 18:14:36,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:14:36,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 18:14:36,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-06 18:14:36,223 INFO L87 Difference]: Start difference. First operand 312 states and 359 transitions. Second operand has 9 states, 9 states have (on average 8.11111111111111) internal successors, (73), 5 states have internal predecessors, (73), 2 states have call successors, (25), 5 states have call predecessors, (25), 3 states have return successors, (24), 3 states have call predecessors, (24), 2 states have call successors, (24) [2021-12-06 18:14:36,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:14:36,692 INFO L93 Difference]: Finished difference Result 446 states and 521 transitions. [2021-12-06 18:14:36,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-06 18:14:36,693 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.11111111111111) internal successors, (73), 5 states have internal predecessors, (73), 2 states have call successors, (25), 5 states have call predecessors, (25), 3 states have return successors, (24), 3 states have call predecessors, (24), 2 states have call successors, (24) Word has length 184 [2021-12-06 18:14:36,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:14:36,694 INFO L225 Difference]: With dead ends: 446 [2021-12-06 18:14:36,694 INFO L226 Difference]: Without dead ends: 332 [2021-12-06 18:14:36,695 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2021-12-06 18:14:36,695 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 156 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 748 SdHoareTripleChecker+Invalid, 658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 18:14:36,695 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 748 Invalid, 658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 18:14:36,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-12-06 18:14:36,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 317. [2021-12-06 18:14:36,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 227 states have (on average 1.0748898678414096) internal successors, (244), 231 states have internal predecessors, (244), 55 states have call successors, (55), 31 states have call predecessors, (55), 34 states have return successors, (65), 54 states have call predecessors, (65), 54 states have call successors, (65) [2021-12-06 18:14:36,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 364 transitions. [2021-12-06 18:14:36,708 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 364 transitions. Word has length 184 [2021-12-06 18:14:36,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:14:36,709 INFO L470 AbstractCegarLoop]: Abstraction has 317 states and 364 transitions. [2021-12-06 18:14:36,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.11111111111111) internal successors, (73), 5 states have internal predecessors, (73), 2 states have call successors, (25), 5 states have call predecessors, (25), 3 states have return successors, (24), 3 states have call predecessors, (24), 2 states have call successors, (24) [2021-12-06 18:14:36,709 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 364 transitions. [2021-12-06 18:14:36,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-06 18:14:36,710 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:14:36,710 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:14:36,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-06 18:14:36,710 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:14:36,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:14:36,711 INFO L85 PathProgramCache]: Analyzing trace with hash 542783001, now seen corresponding path program 1 times [2021-12-06 18:14:36,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:14:36,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112761468] [2021-12-06 18:14:36,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:14:36,711 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:14:36,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:36,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:14:36,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:36,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:14:36,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:36,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 18:14:36,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:36,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:14:36,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:36,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 18:14:36,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:36,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 18:14:36,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:36,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 18:14:36,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:36,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:14:36,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:36,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-06 18:14:36,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:36,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 18:14:36,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:36,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-06 18:14:36,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:36,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-06 18:14:36,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:36,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-06 18:14:36,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:36,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:14:36,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:36,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:14:36,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:36,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 18:14:36,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:36,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 18:14:36,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:36,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-06 18:14:36,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:36,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:14:36,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:36,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-06 18:14:36,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:36,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-12-06 18:14:36,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:36,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:14:36,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:36,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:14:36,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:36,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 18:14:36,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:36,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-06 18:14:36,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:36,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2021-12-06 18:14:36,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:36,976 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 270 trivial. 0 not checked. [2021-12-06 18:14:36,976 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:14:36,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112761468] [2021-12-06 18:14:36,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112761468] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:14:36,976 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:14:36,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-06 18:14:36,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959998162] [2021-12-06 18:14:36,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:14:36,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 18:14:36,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:14:36,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 18:14:36,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-12-06 18:14:36,977 INFO L87 Difference]: Start difference. First operand 317 states and 364 transitions. Second operand has 10 states, 10 states have (on average 7.7) internal successors, (77), 5 states have internal predecessors, (77), 3 states have call successors, (26), 6 states have call predecessors, (26), 2 states have return successors, (25), 4 states have call predecessors, (25), 3 states have call successors, (25) [2021-12-06 18:14:37,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:14:37,438 INFO L93 Difference]: Finished difference Result 443 states and 517 transitions. [2021-12-06 18:14:37,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 18:14:37,438 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.7) internal successors, (77), 5 states have internal predecessors, (77), 3 states have call successors, (26), 6 states have call predecessors, (26), 2 states have return successors, (25), 4 states have call predecessors, (25), 3 states have call successors, (25) Word has length 190 [2021-12-06 18:14:37,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:14:37,440 INFO L225 Difference]: With dead ends: 443 [2021-12-06 18:14:37,440 INFO L226 Difference]: Without dead ends: 313 [2021-12-06 18:14:37,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-12-06 18:14:37,441 INFO L933 BasicCegarLoop]: 181 mSDtfsCounter, 306 mSDsluCounter, 568 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 236 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 749 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 236 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 18:14:37,441 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [306 Valid, 749 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [236 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 18:14:37,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-12-06 18:14:37,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 306. [2021-12-06 18:14:37,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 219 states have (on average 1.0684931506849316) internal successors, (234), 223 states have internal predecessors, (234), 54 states have call successors, (54), 30 states have call predecessors, (54), 32 states have return successors, (63), 52 states have call predecessors, (63), 53 states have call successors, (63) [2021-12-06 18:14:37,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 351 transitions. [2021-12-06 18:14:37,453 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 351 transitions. Word has length 190 [2021-12-06 18:14:37,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:14:37,453 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 351 transitions. [2021-12-06 18:14:37,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.7) internal successors, (77), 5 states have internal predecessors, (77), 3 states have call successors, (26), 6 states have call predecessors, (26), 2 states have return successors, (25), 4 states have call predecessors, (25), 3 states have call successors, (25) [2021-12-06 18:14:37,454 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 351 transitions. [2021-12-06 18:14:37,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-12-06 18:14:37,455 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:14:37,455 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:14:37,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-06 18:14:37,455 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:14:37,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:14:37,455 INFO L85 PathProgramCache]: Analyzing trace with hash 650546100, now seen corresponding path program 1 times [2021-12-06 18:14:37,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:14:37,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838699247] [2021-12-06 18:14:37,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:14:37,455 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:14:37,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:37,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:14:37,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:37,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:14:37,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:37,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 18:14:37,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:37,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:14:37,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:37,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 18:14:37,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:37,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 18:14:37,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:37,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 18:14:37,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:37,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:14:37,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:37,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-06 18:14:37,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:37,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 18:14:37,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:37,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-06 18:14:37,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:37,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-06 18:14:37,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:37,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-06 18:14:37,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:37,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:14:37,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:37,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:14:37,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:37,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 18:14:37,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:37,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 18:14:37,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:37,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-06 18:14:37,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:37,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:14:37,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:37,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 18:14:37,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:37,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:14:37,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:37,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2021-12-06 18:14:37,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:37,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:14:37,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:37,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:14:37,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:37,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 18:14:37,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:37,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-06 18:14:37,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:37,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2021-12-06 18:14:37,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:37,759 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2021-12-06 18:14:37,760 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:14:37,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838699247] [2021-12-06 18:14:37,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838699247] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:14:37,760 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:14:37,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-06 18:14:37,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536283354] [2021-12-06 18:14:37,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:14:37,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-06 18:14:37,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:14:37,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-06 18:14:37,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-12-06 18:14:37,761 INFO L87 Difference]: Start difference. First operand 306 states and 351 transitions. Second operand has 11 states, 10 states have (on average 7.7) internal successors, (77), 6 states have internal predecessors, (77), 2 states have call successors, (26), 5 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 18:14:38,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:14:38,189 INFO L93 Difference]: Finished difference Result 329 states and 377 transitions. [2021-12-06 18:14:38,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 18:14:38,189 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 7.7) internal successors, (77), 6 states have internal predecessors, (77), 2 states have call successors, (26), 5 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 195 [2021-12-06 18:14:38,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:14:38,191 INFO L225 Difference]: With dead ends: 329 [2021-12-06 18:14:38,191 INFO L226 Difference]: Without dead ends: 327 [2021-12-06 18:14:38,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-12-06 18:14:38,191 INFO L933 BasicCegarLoop]: 173 mSDtfsCounter, 224 mSDsluCounter, 752 mSDsCounter, 0 mSdLazyCounter, 625 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 925 SdHoareTripleChecker+Invalid, 792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 18:14:38,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 925 Invalid, 792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 625 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 18:14:38,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-12-06 18:14:38,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 315. [2021-12-06 18:14:38,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 225 states have (on average 1.0666666666666667) internal successors, (240), 230 states have internal predecessors, (240), 55 states have call successors, (55), 31 states have call predecessors, (55), 34 states have return successors, (67), 53 states have call predecessors, (67), 54 states have call successors, (67) [2021-12-06 18:14:38,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 362 transitions. [2021-12-06 18:14:38,204 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 362 transitions. Word has length 195 [2021-12-06 18:14:38,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:14:38,204 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 362 transitions. [2021-12-06 18:14:38,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 7.7) internal successors, (77), 6 states have internal predecessors, (77), 2 states have call successors, (26), 5 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 18:14:38,205 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 362 transitions. [2021-12-06 18:14:38,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2021-12-06 18:14:38,206 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:14:38,206 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:14:38,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-06 18:14:38,206 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:14:38,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:14:38,206 INFO L85 PathProgramCache]: Analyzing trace with hash 2143918970, now seen corresponding path program 1 times [2021-12-06 18:14:38,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:14:38,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958545692] [2021-12-06 18:14:38,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:14:38,207 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:14:38,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:38,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:14:38,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:38,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:14:38,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:39,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 18:14:39,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:39,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:14:39,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:39,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 18:14:39,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:39,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 18:14:39,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:39,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 18:14:39,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:39,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:14:39,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:39,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-06 18:14:39,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:39,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 18:14:39,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:39,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-06 18:14:39,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:39,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-06 18:14:39,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:39,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-06 18:14:39,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:39,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:14:39,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:39,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:14:39,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:39,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 18:14:39,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:39,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 18:14:39,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:39,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-06 18:14:39,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:39,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:14:39,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:39,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 18:14:39,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:39,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:14:39,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:39,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2021-12-06 18:14:39,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:39,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:14:39,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:39,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:14:39,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:39,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 18:14:39,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:39,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-06 18:14:39,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:39,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2021-12-06 18:14:39,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:39,574 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 78 proven. 20 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2021-12-06 18:14:39,575 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:14:39,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958545692] [2021-12-06 18:14:39,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958545692] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:14:39,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166642567] [2021-12-06 18:14:39,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:14:39,575 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:14:39,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:14:39,576 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:14:39,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-06 18:14:39,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:39,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 2997 conjuncts, 84 conjunts are in the unsatisfiable core [2021-12-06 18:14:39,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:14:39,993 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 18:14:40,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:14:40,266 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 22 treesize of output 23 [2021-12-06 18:14:40,268 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 24 treesize of output 16 [2021-12-06 18:14:40,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:14:40,535 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 26 treesize of output 25 [2021-12-06 18:14:40,893 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 122 proven. 50 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2021-12-06 18:14:40,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:14:41,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166642567] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:14:41,156 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:14:41,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 19] total 44 [2021-12-06 18:14:41,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783912244] [2021-12-06 18:14:41,156 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:14:41,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-12-06 18:14:41,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:14:41,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-12-06 18:14:41,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=2114, Unknown=0, NotChecked=0, Total=2256 [2021-12-06 18:14:41,158 INFO L87 Difference]: Start difference. First operand 315 states and 362 transitions. Second operand has 44 states, 39 states have (on average 4.384615384615385) internal successors, (171), 37 states have internal predecessors, (171), 20 states have call successors, (49), 7 states have call predecessors, (49), 12 states have return successors, (47), 23 states have call predecessors, (47), 19 states have call successors, (47) [2021-12-06 18:14:46,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:14:46,272 INFO L93 Difference]: Finished difference Result 734 states and 893 transitions. [2021-12-06 18:14:46,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-12-06 18:14:46,272 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 39 states have (on average 4.384615384615385) internal successors, (171), 37 states have internal predecessors, (171), 20 states have call successors, (49), 7 states have call predecessors, (49), 12 states have return successors, (47), 23 states have call predecessors, (47), 19 states have call successors, (47) Word has length 199 [2021-12-06 18:14:46,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:14:46,275 INFO L225 Difference]: With dead ends: 734 [2021-12-06 18:14:46,275 INFO L226 Difference]: Without dead ends: 598 [2021-12-06 18:14:46,278 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 379 GetRequests, 269 SyntacticMatches, 3 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3212 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=910, Invalid=10862, Unknown=0, NotChecked=0, Total=11772 [2021-12-06 18:14:46,279 INFO L933 BasicCegarLoop]: 294 mSDtfsCounter, 933 mSDsluCounter, 4520 mSDsCounter, 0 mSdLazyCounter, 6919 mSolverCounterSat, 754 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 950 SdHoareTripleChecker+Valid, 4814 SdHoareTripleChecker+Invalid, 9191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 754 IncrementalHoareTripleChecker+Valid, 6919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1518 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:14:46,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [950 Valid, 4814 Invalid, 9191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [754 Valid, 6919 Invalid, 0 Unknown, 1518 Unchecked, 3.1s Time] [2021-12-06 18:14:46,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2021-12-06 18:14:46,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 505. [2021-12-06 18:14:46,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 357 states have (on average 1.0784313725490196) internal successors, (385), 367 states have internal predecessors, (385), 89 states have call successors, (89), 48 states have call predecessors, (89), 58 states have return successors, (116), 89 states have call predecessors, (116), 87 states have call successors, (116) [2021-12-06 18:14:46,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 590 transitions. [2021-12-06 18:14:46,303 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 590 transitions. Word has length 199 [2021-12-06 18:14:46,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:14:46,304 INFO L470 AbstractCegarLoop]: Abstraction has 505 states and 590 transitions. [2021-12-06 18:14:46,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 39 states have (on average 4.384615384615385) internal successors, (171), 37 states have internal predecessors, (171), 20 states have call successors, (49), 7 states have call predecessors, (49), 12 states have return successors, (47), 23 states have call predecessors, (47), 19 states have call successors, (47) [2021-12-06 18:14:46,304 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 590 transitions. [2021-12-06 18:14:46,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-12-06 18:14:46,306 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:14:46,306 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:14:46,330 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-12-06 18:14:46,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-12-06 18:14:46,506 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:14:46,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:14:46,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1307158718, now seen corresponding path program 1 times [2021-12-06 18:14:46,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:14:46,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910628379] [2021-12-06 18:14:46,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:14:46,507 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:14:46,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:46,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:14:46,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:46,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:14:46,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:46,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 18:14:46,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:46,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:14:46,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:46,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 18:14:46,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:46,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 18:14:46,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:46,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 18:14:46,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:46,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:14:46,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:46,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-06 18:14:46,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:46,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 18:14:46,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:46,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-06 18:14:46,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:46,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-06 18:14:46,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:46,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-06 18:14:46,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:46,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-06 18:14:46,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:46,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:14:46,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:46,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:14:46,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:46,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 18:14:46,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:46,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 18:14:46,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:46,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-06 18:14:46,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:46,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:14:46,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:46,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 18:14:46,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:46,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:14:46,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:46,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2021-12-06 18:14:46,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:46,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:14:46,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:46,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:14:46,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:46,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 18:14:46,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:46,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-06 18:14:46,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:46,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 180 [2021-12-06 18:14:46,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:46,983 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 24 proven. 8 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2021-12-06 18:14:46,983 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:14:46,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910628379] [2021-12-06 18:14:46,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910628379] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:14:46,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498303044] [2021-12-06 18:14:46,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:14:46,984 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:14:46,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:14:46,984 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:14:46,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-06 18:14:47,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:47,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 3035 conjuncts, 65 conjunts are in the unsatisfiable core [2021-12-06 18:14:47,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:14:47,335 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 18:14:47,519 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-06 18:14:47,520 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 18:14:47,548 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 18:14:47,822 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-06 18:14:47,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 18:14:57,991 INFO L354 Elim1Store]: treesize reduction 46, result has 40.3 percent of original size [2021-12-06 18:14:57,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 42 [2021-12-06 18:14:58,376 INFO L354 Elim1Store]: treesize reduction 8, result has 78.4 percent of original size [2021-12-06 18:14:58,377 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 53 treesize of output 67 [2021-12-06 18:14:58,437 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 18:15:00,534 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 18:15:07,021 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 237 proven. 49 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-06 18:15:07,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:15:07,299 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2885 (Array Int Int))) (not (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_save_byte_from_array_~storage#1.base| v_ArrVal_2885) |c_ULTIMATE.start_aws_byte_buf_init_copy_harness_~#src~0#1.base|) (+ |c_ULTIMATE.start_aws_byte_buf_init_copy_harness_~#src~0#1.offset| 8)) 0))) is different from false [2021-12-06 18:15:07,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498303044] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:15:07,302 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:15:07,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 22] total 35 [2021-12-06 18:15:07,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694632153] [2021-12-06 18:15:07,303 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:15:07,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-06 18:15:07,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:15:07,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-06 18:15:07,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1496, Unknown=5, NotChecked=78, Total=1722 [2021-12-06 18:15:07,305 INFO L87 Difference]: Start difference. First operand 505 states and 590 transitions. Second operand has 35 states, 34 states have (on average 6.088235294117647) internal successors, (207), 31 states have internal predecessors, (207), 12 states have call successors, (55), 11 states have call predecessors, (55), 12 states have return successors, (54), 14 states have call predecessors, (54), 12 states have call successors, (54) [2021-12-06 18:15:13,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:15:13,693 INFO L93 Difference]: Finished difference Result 609 states and 716 transitions. [2021-12-06 18:15:13,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-12-06 18:15:13,693 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 6.088235294117647) internal successors, (207), 31 states have internal predecessors, (207), 12 states have call successors, (55), 11 states have call predecessors, (55), 12 states have return successors, (54), 14 states have call predecessors, (54), 12 states have call successors, (54) Word has length 200 [2021-12-06 18:15:13,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:15:13,695 INFO L225 Difference]: With dead ends: 609 [2021-12-06 18:15:13,695 INFO L226 Difference]: Without dead ends: 422 [2021-12-06 18:15:13,697 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 355 SyntacticMatches, 16 SemanticMatches, 66 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1309 ImplicationChecksByTransitivity, 24.5s TimeCoverageRelationStatistics Valid=418, Invalid=4002, Unknown=6, NotChecked=130, Total=4556 [2021-12-06 18:15:13,697 INFO L933 BasicCegarLoop]: 179 mSDtfsCounter, 500 mSDsluCounter, 873 mSDsCounter, 0 mSdLazyCounter, 1864 mSolverCounterSat, 373 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 521 SdHoareTripleChecker+Valid, 1052 SdHoareTripleChecker+Invalid, 3283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 373 IncrementalHoareTripleChecker+Valid, 1864 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1046 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:15:13,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [521 Valid, 1052 Invalid, 3283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [373 Valid, 1864 Invalid, 0 Unknown, 1046 Unchecked, 1.0s Time] [2021-12-06 18:15:13,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2021-12-06 18:15:13,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 316. [2021-12-06 18:15:13,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 224 states have (on average 1.0714285714285714) internal successors, (240), 228 states have internal predecessors, (240), 53 states have call successors, (53), 34 states have call predecessors, (53), 38 states have return successors, (58), 53 states have call predecessors, (58), 52 states have call successors, (58) [2021-12-06 18:15:13,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 351 transitions. [2021-12-06 18:15:13,713 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 351 transitions. Word has length 200 [2021-12-06 18:15:13,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:15:13,713 INFO L470 AbstractCegarLoop]: Abstraction has 316 states and 351 transitions. [2021-12-06 18:15:13,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 6.088235294117647) internal successors, (207), 31 states have internal predecessors, (207), 12 states have call successors, (55), 11 states have call predecessors, (55), 12 states have return successors, (54), 14 states have call predecessors, (54), 12 states have call successors, (54) [2021-12-06 18:15:13,714 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 351 transitions. [2021-12-06 18:15:13,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2021-12-06 18:15:13,715 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:15:13,715 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:15:13,739 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-12-06 18:15:13,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-06 18:15:13,915 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:15:13,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:15:13,916 INFO L85 PathProgramCache]: Analyzing trace with hash -982458048, now seen corresponding path program 1 times [2021-12-06 18:15:13,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:15:13,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955187644] [2021-12-06 18:15:13,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:15:13,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:15:14,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:15:14,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:15:14,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:15:14,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:15:14,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:15:14,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 18:15:14,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:15:14,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:15:14,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:15:14,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 18:15:14,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:15:14,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 18:15:14,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:15:14,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 18:15:14,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:15:14,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:15:14,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:15:14,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-06 18:15:14,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:15:14,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 18:15:14,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:15:14,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-06 18:15:14,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:15:14,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-06 18:15:14,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:15:14,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-06 18:15:14,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:15:14,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:15:14,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:15:14,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:15:14,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:15:14,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 18:15:14,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:15:14,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 18:15:14,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:15:14,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-06 18:15:14,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:15:14,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:15:14,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:15:14,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 18:15:14,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:15:14,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:15:14,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:15:14,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2021-12-06 18:15:14,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:15:14,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:15:14,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:15:14,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:15:14,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:15:14,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 18:15:14,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:15:14,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-06 18:15:14,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:15:14,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2021-12-06 18:15:14,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:15:14,427 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 14 proven. 23 refuted. 0 times theorem prover too weak. 295 trivial. 0 not checked. [2021-12-06 18:15:14,427 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:15:14,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955187644] [2021-12-06 18:15:14,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955187644] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:15:14,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762103160] [2021-12-06 18:15:14,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:15:14,427 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:15:14,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:15:14,428 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:15:14,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-06 18:15:14,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:15:14,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 2994 conjuncts, 84 conjunts are in the unsatisfiable core [2021-12-06 18:15:14,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:15:14,904 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 18:15:14,907 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 6 treesize of output 5 [2021-12-06 18:15:15,298 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 20 treesize of output 8 [2021-12-06 18:15:15,701 INFO L354 Elim1Store]: treesize reduction 288, result has 17.5 percent of original size [2021-12-06 18:15:15,702 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 4 case distinctions, treesize of input 40 treesize of output 75 [2021-12-06 18:15:16,987 INFO L354 Elim1Store]: treesize reduction 50, result has 33.3 percent of original size [2021-12-06 18:15:16,988 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 3 case distinctions, treesize of input 50 treesize of output 58 [2021-12-06 18:15:18,077 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 19 proven. 277 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-06 18:15:18,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:15:30,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762103160] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:15:30,500 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:15:30,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22] total 37 [2021-12-06 18:15:30,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335591230] [2021-12-06 18:15:30,500 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:15:30,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-06 18:15:30,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:15:30,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-06 18:15:30,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1809, Unknown=3, NotChecked=0, Total=1980 [2021-12-06 18:15:30,502 INFO L87 Difference]: Start difference. First operand 316 states and 351 transitions. Second operand has 37 states, 37 states have (on average 5.54054054054054) internal successors, (205), 33 states have internal predecessors, (205), 14 states have call successors, (50), 10 states have call predecessors, (50), 10 states have return successors, (48), 15 states have call predecessors, (48), 13 states have call successors, (48) [2021-12-06 18:15:32,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:15:32,818 INFO L93 Difference]: Finished difference Result 545 states and 620 transitions. [2021-12-06 18:15:32,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-12-06 18:15:32,819 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 5.54054054054054) internal successors, (205), 33 states have internal predecessors, (205), 14 states have call successors, (50), 10 states have call predecessors, (50), 10 states have return successors, (48), 15 states have call predecessors, (48), 13 states have call successors, (48) Word has length 199 [2021-12-06 18:15:32,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:15:32,821 INFO L225 Difference]: With dead ends: 545 [2021-12-06 18:15:32,821 INFO L226 Difference]: Without dead ends: 456 [2021-12-06 18:15:32,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 254 SyntacticMatches, 15 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1965 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=502, Invalid=5657, Unknown=3, NotChecked=0, Total=6162 [2021-12-06 18:15:32,823 INFO L933 BasicCegarLoop]: 222 mSDtfsCounter, 340 mSDsluCounter, 1802 mSDsCounter, 0 mSdLazyCounter, 1910 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 2024 SdHoareTripleChecker+Invalid, 2995 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 1910 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 862 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:15:32,823 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [344 Valid, 2024 Invalid, 2995 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 1910 Invalid, 0 Unknown, 862 Unchecked, 1.2s Time] [2021-12-06 18:15:32,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-12-06 18:15:32,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 425. [2021-12-06 18:15:32,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 304 states have (on average 1.055921052631579) internal successors, (321), 310 states have internal predecessors, (321), 70 states have call successors, (70), 45 states have call predecessors, (70), 50 states have return successors, (80), 69 states have call predecessors, (80), 69 states have call successors, (80) [2021-12-06 18:15:32,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 471 transitions. [2021-12-06 18:15:32,843 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 471 transitions. Word has length 199 [2021-12-06 18:15:32,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:15:32,844 INFO L470 AbstractCegarLoop]: Abstraction has 425 states and 471 transitions. [2021-12-06 18:15:32,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 5.54054054054054) internal successors, (205), 33 states have internal predecessors, (205), 14 states have call successors, (50), 10 states have call predecessors, (50), 10 states have return successors, (48), 15 states have call predecessors, (48), 13 states have call successors, (48) [2021-12-06 18:15:32,844 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 471 transitions. [2021-12-06 18:15:32,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2021-12-06 18:15:32,846 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:15:32,846 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:15:32,881 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-12-06 18:15:33,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-12-06 18:15:33,047 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:15:33,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:15:33,047 INFO L85 PathProgramCache]: Analyzing trace with hash -617173436, now seen corresponding path program 1 times [2021-12-06 18:15:33,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:15:33,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898164531] [2021-12-06 18:15:33,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:15:33,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:15:33,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:15:33,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:15:33,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:15:33,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:15:33,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:15:33,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 18:15:33,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:15:33,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:15:33,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:15:33,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 18:15:33,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:15:33,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 18:15:33,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:15:33,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 18:15:33,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:15:33,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:15:33,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:15:33,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-06 18:15:33,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:15:33,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 18:15:33,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:15:33,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-06 18:15:33,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:15:33,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-06 18:15:33,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:15:33,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-06 18:15:33,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:15:33,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:15:33,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:15:33,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:15:33,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:15:33,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 18:15:33,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:15:33,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 18:15:33,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:15:33,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-06 18:15:33,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:15:33,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:15:33,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:15:33,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 18:15:33,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:15:33,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:15:33,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:15:33,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2021-12-06 18:15:33,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:15:33,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:15:33,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:15:33,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:15:33,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:15:33,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 18:15:33,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:15:33,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-06 18:15:33,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:15:33,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2021-12-06 18:15:33,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:15:33,787 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 2 proven. 32 refuted. 0 times theorem prover too weak. 298 trivial. 0 not checked. [2021-12-06 18:15:33,787 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:15:33,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898164531] [2021-12-06 18:15:33,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898164531] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:15:33,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795617743] [2021-12-06 18:15:33,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:15:33,788 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:15:33,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:15:33,789 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:15:33,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-06 18:15:34,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:15:34,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 3004 conjuncts, 49 conjunts are in the unsatisfiable core [2021-12-06 18:15:34,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:15:34,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 18:15:34,320 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 6 treesize of output 5 [2021-12-06 18:15:35,210 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 18:15:35,212 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 16 treesize of output 8 [2021-12-06 18:15:35,340 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 195 proven. 2 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-12-06 18:15:35,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:15:35,822 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 22 [2021-12-06 18:15:35,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-12-06 18:15:35,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 34 [2021-12-06 18:15:35,992 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 298 trivial. 0 not checked. [2021-12-06 18:15:35,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795617743] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:15:35,992 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:15:35,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 14, 12] total 47 [2021-12-06 18:15:35,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204018495] [2021-12-06 18:15:35,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:15:35,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-12-06 18:15:35,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:15:35,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-12-06 18:15:35,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=2002, Unknown=0, NotChecked=0, Total=2162 [2021-12-06 18:15:35,994 INFO L87 Difference]: Start difference. First operand 425 states and 471 transitions. Second operand has 47 states, 45 states have (on average 5.022222222222222) internal successors, (226), 40 states have internal predecessors, (226), 20 states have call successors, (71), 8 states have call predecessors, (71), 11 states have return successors, (68), 20 states have call predecessors, (68), 20 states have call successors, (68) [2021-12-06 18:15:41,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:15:41,010 INFO L93 Difference]: Finished difference Result 717 states and 840 transitions. [2021-12-06 18:15:41,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-12-06 18:15:41,010 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 45 states have (on average 5.022222222222222) internal successors, (226), 40 states have internal predecessors, (226), 20 states have call successors, (71), 8 states have call predecessors, (71), 11 states have return successors, (68), 20 states have call predecessors, (68), 20 states have call successors, (68) Word has length 199 [2021-12-06 18:15:41,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:15:41,013 INFO L225 Difference]: With dead ends: 717 [2021-12-06 18:15:41,013 INFO L226 Difference]: Without dead ends: 492 [2021-12-06 18:15:41,015 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 524 GetRequests, 434 SyntacticMatches, 6 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1694 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=620, Invalid=6690, Unknown=0, NotChecked=0, Total=7310 [2021-12-06 18:15:41,015 INFO L933 BasicCegarLoop]: 202 mSDtfsCounter, 504 mSDsluCounter, 2332 mSDsCounter, 0 mSdLazyCounter, 5179 mSolverCounterSat, 495 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 504 SdHoareTripleChecker+Valid, 2534 SdHoareTripleChecker+Invalid, 6523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 495 IncrementalHoareTripleChecker+Valid, 5179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 849 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2021-12-06 18:15:41,015 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [504 Valid, 2534 Invalid, 6523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [495 Valid, 5179 Invalid, 0 Unknown, 849 Unchecked, 3.8s Time] [2021-12-06 18:15:41,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2021-12-06 18:15:41,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 418. [2021-12-06 18:15:41,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 300 states have (on average 1.0533333333333332) internal successors, (316), 305 states have internal predecessors, (316), 68 states have call successors, (68), 44 states have call predecessors, (68), 49 states have return successors, (78), 68 states have call predecessors, (78), 67 states have call successors, (78) [2021-12-06 18:15:41,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 462 transitions. [2021-12-06 18:15:41,038 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 462 transitions. Word has length 199 [2021-12-06 18:15:41,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:15:41,039 INFO L470 AbstractCegarLoop]: Abstraction has 418 states and 462 transitions. [2021-12-06 18:15:41,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 45 states have (on average 5.022222222222222) internal successors, (226), 40 states have internal predecessors, (226), 20 states have call successors, (71), 8 states have call predecessors, (71), 11 states have return successors, (68), 20 states have call predecessors, (68), 20 states have call successors, (68) [2021-12-06 18:15:41,039 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 462 transitions. [2021-12-06 18:15:41,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2021-12-06 18:15:41,040 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:15:41,040 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:15:41,064 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-12-06 18:15:41,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:15:41,241 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:15:41,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:15:41,242 INFO L85 PathProgramCache]: Analyzing trace with hash -657781579, now seen corresponding path program 1 times [2021-12-06 18:15:41,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:15:41,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988337403] [2021-12-06 18:15:41,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:15:41,242 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:15:41,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:15:41,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:15:41,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:15:41,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:15:41,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:15:41,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 18:15:41,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:15:41,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:15:41,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:15:41,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 18:15:41,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:15:41,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 18:15:41,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:15:41,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 18:15:41,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:15:41,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:15:41,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:15:41,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-06 18:15:41,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:15:41,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 18:15:41,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:15:41,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-06 18:15:41,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:15:41,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-06 18:15:41,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:15:41,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-06 18:15:41,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:15:41,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-12-06 18:15:41,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:15:41,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:15:41,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:15:41,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:15:41,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:15:41,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 18:15:41,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:15:41,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 18:15:41,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:15:41,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-06 18:15:41,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:15:41,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:15:41,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:15:41,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 18:15:41,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:15:41,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:15:41,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:15:41,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2021-12-06 18:15:41,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:15:41,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:15:41,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:15:41,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:15:41,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:15:41,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 18:15:41,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:15:41,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-06 18:15:41,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:15:41,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 186 [2021-12-06 18:15:41,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:15:41,889 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 18 proven. 16 refuted. 0 times theorem prover too weak. 346 trivial. 0 not checked. [2021-12-06 18:15:41,889 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:15:41,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988337403] [2021-12-06 18:15:41,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988337403] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:15:41,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616529504] [2021-12-06 18:15:41,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:15:41,890 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:15:41,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:15:41,890 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:15:41,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-06 18:15:42,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:15:42,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 3049 conjuncts, 117 conjunts are in the unsatisfiable core [2021-12-06 18:15:42,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:15:42,356 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 18:15:43,335 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:15:43,335 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 24 treesize of output 28 [2021-12-06 18:15:43,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:15:43,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-12-06 18:15:43,418 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:15:43,418 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 28 treesize of output 32 [2021-12-06 18:15:43,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:15:43,661 INFO L354 Elim1Store]: treesize reduction 157, result has 14.2 percent of original size [2021-12-06 18:15:43,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 56 [2021-12-06 18:16:13,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:16:13,541 INFO L354 Elim1Store]: treesize reduction 56, result has 23.3 percent of original size [2021-12-06 18:16:13,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 53 [2021-12-06 18:16:15,684 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_byte_buf_init_copy_~dest#1.base_BEFORE_CALL_21| Int) (|v_ULTIMATE.start_aws_byte_buf_init_copy_~dest#1.offset_BEFORE_CALL_16| Int) (|v_ULTIMATE.start_aws_byte_buf_init_copy_~src#1.base_17| Int)) (let ((.cse2 (select |c_#memory_int| |v_ULTIMATE.start_aws_byte_buf_init_copy_~dest#1.base_BEFORE_CALL_21|)) (.cse3 (select |c_#memory_int| |v_ULTIMATE.start_aws_byte_buf_init_copy_~src#1.base_17|))) (let ((.cse0 (select .cse3 0)) (.cse1 (select .cse2 (+ |v_ULTIMATE.start_aws_byte_buf_init_copy_~dest#1.offset_BEFORE_CALL_16| 16)))) (and (<= (mod .cse0 18446744073709551616) (mod .cse1 18446744073709551616)) (= .cse0 (select .cse2 |v_ULTIMATE.start_aws_byte_buf_init_copy_~dest#1.offset_BEFORE_CALL_16|)) (< (+ |v_ULTIMATE.start_aws_byte_buf_init_copy_~dest#1.base_BEFORE_CALL_21| 1) |v_ULTIMATE.start_aws_byte_buf_init_copy_~src#1.base_17|) (= .cse1 (select .cse3 16)))))) is different from true [2021-12-06 18:16:20,334 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 112 proven. 123 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-12-06 18:16:20,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:16:21,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616529504] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:16:21,141 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:16:21,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 28] total 46 [2021-12-06 18:16:21,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112963415] [2021-12-06 18:16:21,142 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:16:21,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-06 18:16:21,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:16:21,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-06 18:16:21,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=2373, Unknown=10, NotChecked=98, Total=2652 [2021-12-06 18:16:21,144 INFO L87 Difference]: Start difference. First operand 418 states and 462 transitions. Second operand has 46 states, 40 states have (on average 4.425) internal successors, (177), 40 states have internal predecessors, (177), 21 states have call successors, (54), 10 states have call predecessors, (54), 12 states have return successors, (53), 21 states have call predecessors, (53), 21 states have call successors, (53) [2021-12-06 18:16:40,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:16:40,065 INFO L93 Difference]: Finished difference Result 565 states and 639 transitions. [2021-12-06 18:16:40,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-12-06 18:16:40,066 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 40 states have (on average 4.425) internal successors, (177), 40 states have internal predecessors, (177), 21 states have call successors, (54), 10 states have call predecessors, (54), 12 states have return successors, (53), 21 states have call predecessors, (53), 21 states have call successors, (53) Word has length 206 [2021-12-06 18:16:40,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:16:40,068 INFO L225 Difference]: With dead ends: 565 [2021-12-06 18:16:40,068 INFO L226 Difference]: Without dead ends: 447 [2021-12-06 18:16:40,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 265 SyntacticMatches, 3 SemanticMatches, 96 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2506 ImplicationChecksByTransitivity, 53.8s TimeCoverageRelationStatistics Valid=735, Invalid=8566, Unknown=15, NotChecked=190, Total=9506 [2021-12-06 18:16:40,071 INFO L933 BasicCegarLoop]: 195 mSDtfsCounter, 394 mSDsluCounter, 2500 mSDsCounter, 0 mSdLazyCounter, 2557 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 397 SdHoareTripleChecker+Valid, 2695 SdHoareTripleChecker+Invalid, 3949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 249 IncrementalHoareTripleChecker+Valid, 2557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1143 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:16:40,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [397 Valid, 2695 Invalid, 3949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [249 Valid, 2557 Invalid, 0 Unknown, 1143 Unchecked, 2.1s Time] [2021-12-06 18:16:40,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-12-06 18:16:40,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 398. [2021-12-06 18:16:40,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 283 states have (on average 1.0530035335689045) internal successors, (298), 288 states have internal predecessors, (298), 66 states have call successors, (66), 44 states have call predecessors, (66), 48 states have return successors, (73), 65 states have call predecessors, (73), 65 states have call successors, (73) [2021-12-06 18:16:40,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 437 transitions. [2021-12-06 18:16:40,101 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 437 transitions. Word has length 206 [2021-12-06 18:16:40,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:16:40,101 INFO L470 AbstractCegarLoop]: Abstraction has 398 states and 437 transitions. [2021-12-06 18:16:40,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 40 states have (on average 4.425) internal successors, (177), 40 states have internal predecessors, (177), 21 states have call successors, (54), 10 states have call predecessors, (54), 12 states have return successors, (53), 21 states have call predecessors, (53), 21 states have call successors, (53) [2021-12-06 18:16:40,101 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 437 transitions. [2021-12-06 18:16:40,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-12-06 18:16:40,102 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:16:40,102 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:16:40,125 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-12-06 18:16:40,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-12-06 18:16:40,303 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:16:40,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:16:40,303 INFO L85 PathProgramCache]: Analyzing trace with hash 1464724382, now seen corresponding path program 1 times [2021-12-06 18:16:40,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:16:40,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786145502] [2021-12-06 18:16:40,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:16:40,304 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:16:40,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:16:40,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:16:40,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:16:40,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:16:40,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:16:40,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 18:16:40,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:16:40,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:16:40,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:16:40,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 18:16:40,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:16:40,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 18:16:40,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:16:40,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 18:16:40,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:16:40,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:16:40,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:16:40,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-06 18:16:40,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:16:40,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 18:16:40,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:16:40,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-06 18:16:40,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:16:40,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-06 18:16:40,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:16:40,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-06 18:16:40,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:16:41,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:16:41,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:16:41,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:16:41,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:16:41,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 18:16:41,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:16:41,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 18:16:41,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:16:41,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-06 18:16:41,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:16:41,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:16:41,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:16:41,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 18:16:41,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:16:41,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:16:41,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:16:41,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2021-12-06 18:16:41,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:16:41,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:16:41,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:16:41,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:16:41,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:16:41,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 18:16:41,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:16:41,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-06 18:16:41,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:16:41,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2021-12-06 18:16:41,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:16:41,445 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 8 proven. 33 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2021-12-06 18:16:41,445 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:16:41,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786145502] [2021-12-06 18:16:41,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786145502] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:16:41,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226904060] [2021-12-06 18:16:41,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:16:41,446 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:16:41,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:16:41,446 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:16:41,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-06 18:16:41,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:16:41,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 3021 conjuncts, 49 conjunts are in the unsatisfiable core [2021-12-06 18:16:41,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:16:43,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:16:43,446 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 26 treesize of output 26 [2021-12-06 18:16:43,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:16:43,747 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 26 treesize of output 26 [2021-12-06 18:16:43,802 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 18:16:43,952 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 100 proven. 146 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-12-06 18:16:43,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:16:44,326 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3551 (Array Int Int))) (<= 0 (let ((.cse0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_aws_byte_buf_init_copy_~dest#1.base| v_ArrVal_3551) |c_ULTIMATE.start_aws_byte_buf_init_copy_~src#1.base|) |c_ULTIMATE.start_aws_byte_buf_init_copy_~src#1.offset|))) (+ (* 18446744073709551616 (div (* .cse0 (- 1)) 18446744073709551616)) .cse0)))) is different from false [2021-12-06 18:16:44,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226904060] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:16:44,340 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:16:44,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 19] total 47 [2021-12-06 18:16:44,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394828358] [2021-12-06 18:16:44,341 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:16:44,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-12-06 18:16:44,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:16:44,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-12-06 18:16:44,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=2305, Unknown=1, NotChecked=96, Total=2550 [2021-12-06 18:16:44,342 INFO L87 Difference]: Start difference. First operand 398 states and 437 transitions. Second operand has 47 states, 44 states have (on average 4.25) internal successors, (187), 39 states have internal predecessors, (187), 18 states have call successors, (50), 7 states have call predecessors, (50), 12 states have return successors, (48), 21 states have call predecessors, (48), 18 states have call successors, (48) [2021-12-06 18:16:48,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:16:48,956 INFO L93 Difference]: Finished difference Result 592 states and 677 transitions. [2021-12-06 18:16:48,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-12-06 18:16:48,957 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 44 states have (on average 4.25) internal successors, (187), 39 states have internal predecessors, (187), 18 states have call successors, (50), 7 states have call predecessors, (50), 12 states have return successors, (48), 21 states have call predecessors, (48), 18 states have call successors, (48) Word has length 201 [2021-12-06 18:16:48,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:16:48,959 INFO L225 Difference]: With dead ends: 592 [2021-12-06 18:16:48,959 INFO L226 Difference]: Without dead ends: 448 [2021-12-06 18:16:48,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 288 SyntacticMatches, 18 SemanticMatches, 95 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2391 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=534, Invalid=8589, Unknown=1, NotChecked=188, Total=9312 [2021-12-06 18:16:48,960 INFO L933 BasicCegarLoop]: 223 mSDtfsCounter, 342 mSDsluCounter, 3269 mSDsCounter, 0 mSdLazyCounter, 5296 mSolverCounterSat, 244 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 3492 SdHoareTripleChecker+Invalid, 6721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 244 IncrementalHoareTripleChecker+Valid, 5296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1181 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-06 18:16:48,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [358 Valid, 3492 Invalid, 6721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [244 Valid, 5296 Invalid, 0 Unknown, 1181 Unchecked, 2.9s Time] [2021-12-06 18:16:48,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2021-12-06 18:16:48,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 401. [2021-12-06 18:16:48,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 285 states have (on average 1.0491228070175438) internal successors, (299), 290 states have internal predecessors, (299), 67 states have call successors, (67), 44 states have call predecessors, (67), 48 states have return successors, (73), 66 states have call predecessors, (73), 66 states have call successors, (73) [2021-12-06 18:16:48,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 439 transitions. [2021-12-06 18:16:48,983 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 439 transitions. Word has length 201 [2021-12-06 18:16:48,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:16:48,983 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 439 transitions. [2021-12-06 18:16:48,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 44 states have (on average 4.25) internal successors, (187), 39 states have internal predecessors, (187), 18 states have call successors, (50), 7 states have call predecessors, (50), 12 states have return successors, (48), 21 states have call predecessors, (48), 18 states have call successors, (48) [2021-12-06 18:16:48,983 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 439 transitions. [2021-12-06 18:16:48,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2021-12-06 18:16:48,984 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:16:48,984 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:16:49,007 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-12-06 18:16:49,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:16:49,186 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:16:49,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:16:49,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1674772008, now seen corresponding path program 1 times [2021-12-06 18:16:49,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:16:49,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167881907] [2021-12-06 18:16:49,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:16:49,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:16:49,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:16:49,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:16:49,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:16:49,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:16:49,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:16:49,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 18:16:49,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:16:49,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:16:49,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:16:49,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 18:16:49,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:16:49,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 18:16:49,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:16:49,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 18:16:49,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:16:49,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:16:49,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:16:49,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-06 18:16:49,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:16:49,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 18:16:49,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:16:49,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-06 18:16:49,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:16:49,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-06 18:16:49,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:16:49,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-06 18:16:49,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:16:49,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-12-06 18:16:49,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:16:49,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:16:49,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:16:49,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:16:49,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:16:49,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 18:16:49,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:16:49,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 18:16:49,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:16:49,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-06 18:16:49,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:16:49,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:16:49,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:16:49,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 18:16:49,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:16:49,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:16:49,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:16:49,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2021-12-06 18:16:49,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:16:49,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:16:49,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:16:49,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:16:49,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:16:49,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 18:16:49,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:16:49,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-06 18:16:49,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:16:49,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 186 [2021-12-06 18:16:49,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:16:49,515 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 372 trivial. 0 not checked. [2021-12-06 18:16:49,515 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:16:49,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167881907] [2021-12-06 18:16:49,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167881907] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:16:49,515 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:16:49,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-06 18:16:49,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560502660] [2021-12-06 18:16:49,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:16:49,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-06 18:16:49,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:16:49,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-06 18:16:49,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2021-12-06 18:16:49,517 INFO L87 Difference]: Start difference. First operand 401 states and 439 transitions. Second operand has 13 states, 12 states have (on average 6.666666666666667) internal successors, (80), 8 states have internal predecessors, (80), 2 states have call successors, (27), 5 states have call predecessors, (27), 2 states have return successors, (26), 2 states have call predecessors, (26), 1 states have call successors, (26) [2021-12-06 18:16:50,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:16:50,062 INFO L93 Difference]: Finished difference Result 421 states and 461 transitions. [2021-12-06 18:16:50,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 18:16:50,063 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 6.666666666666667) internal successors, (80), 8 states have internal predecessors, (80), 2 states have call successors, (27), 5 states have call predecessors, (27), 2 states have return successors, (26), 2 states have call predecessors, (26), 1 states have call successors, (26) Word has length 208 [2021-12-06 18:16:50,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:16:50,064 INFO L225 Difference]: With dead ends: 421 [2021-12-06 18:16:50,064 INFO L226 Difference]: Without dead ends: 419 [2021-12-06 18:16:50,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2021-12-06 18:16:50,065 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 235 mSDsluCounter, 976 mSDsCounter, 0 mSdLazyCounter, 773 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 1143 SdHoareTripleChecker+Invalid, 956 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 18:16:50,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 1143 Invalid, 956 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 773 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 18:16:50,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2021-12-06 18:16:50,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 409. [2021-12-06 18:16:50,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 292 states have (on average 1.047945205479452) internal successors, (306), 298 states have internal predecessors, (306), 67 states have call successors, (67), 44 states have call predecessors, (67), 49 states have return successors, (74), 66 states have call predecessors, (74), 66 states have call successors, (74) [2021-12-06 18:16:50,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 447 transitions. [2021-12-06 18:16:50,087 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 447 transitions. Word has length 208 [2021-12-06 18:16:50,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:16:50,087 INFO L470 AbstractCegarLoop]: Abstraction has 409 states and 447 transitions. [2021-12-06 18:16:50,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 6.666666666666667) internal successors, (80), 8 states have internal predecessors, (80), 2 states have call successors, (27), 5 states have call predecessors, (27), 2 states have return successors, (26), 2 states have call predecessors, (26), 1 states have call successors, (26) [2021-12-06 18:16:50,087 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 447 transitions. [2021-12-06 18:16:50,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2021-12-06 18:16:50,088 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:16:50,088 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:16:50,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-12-06 18:16:50,089 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:16:50,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:16:50,089 INFO L85 PathProgramCache]: Analyzing trace with hash 1593561425, now seen corresponding path program 1 times [2021-12-06 18:16:50,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:16:50,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172489865] [2021-12-06 18:16:50,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:16:50,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:16:50,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:16:50,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:16:50,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:16:50,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:16:50,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:16:50,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 18:16:50,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:16:50,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:16:50,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:16:50,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 18:16:50,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:16:50,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 18:16:50,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:16:50,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 18:16:50,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:16:50,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:16:50,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:16:50,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-06 18:16:50,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:16:50,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 18:16:50,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:16:50,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-06 18:16:50,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:16:50,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-06 18:16:50,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:16:50,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-06 18:16:50,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:16:50,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-12-06 18:16:50,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:16:50,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:16:50,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:16:50,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:16:50,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:16:50,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 18:16:50,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:16:50,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 18:16:50,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:16:50,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-06 18:16:50,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:16:50,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:16:50,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:16:50,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 18:16:50,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:16:50,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:16:50,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:16:50,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2021-12-06 18:16:50,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:16:50,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:16:50,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:16:50,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:16:50,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:16:50,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 18:16:50,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:16:50,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-06 18:16:50,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:16:50,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2021-12-06 18:16:50,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:16:51,094 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 36 proven. 3 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2021-12-06 18:16:51,095 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:16:51,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172489865] [2021-12-06 18:16:51,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172489865] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:16:51,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78921205] [2021-12-06 18:16:51,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:16:51,095 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:16:51,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:16:51,096 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:16:51,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-12-06 18:16:51,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:16:51,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 3071 conjuncts, 104 conjunts are in the unsatisfiable core [2021-12-06 18:16:51,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:16:51,530 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 18:16:51,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:16:51,738 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 12 treesize of output 14 [2021-12-06 18:16:52,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:16:52,236 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 22 treesize of output 25 [2021-12-06 18:16:52,244 INFO L354 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2021-12-06 18:16:52,244 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 1 case distinctions, treesize of input 21 treesize of output 25 [2021-12-06 18:16:52,327 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 5 treesize of output 3 [2021-12-06 18:17:00,921 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_byte_buf_init_copy_~dest#1.base_BEFORE_CALL_31| Int) (|ULTIMATE.start_aws_byte_buf_init_copy_~src#1.offset| Int) (|v_ULTIMATE.start_aws_byte_buf_init_copy_~dest#1.offset_BEFORE_CALL_19| Int) (|ULTIMATE.start_aws_byte_buf_init_copy_~src#1.base| Int)) (and (<= (+ |v_ULTIMATE.start_aws_byte_buf_init_copy_~dest#1.base_BEFORE_CALL_31| 2) |ULTIMATE.start_aws_byte_buf_init_copy_~src#1.base|) (= (select (select |c_#memory_int| |v_ULTIMATE.start_aws_byte_buf_init_copy_~dest#1.base_BEFORE_CALL_31|) (+ |v_ULTIMATE.start_aws_byte_buf_init_copy_~dest#1.offset_BEFORE_CALL_19| 16)) (select (select |c_#memory_int| |ULTIMATE.start_aws_byte_buf_init_copy_~src#1.base|) (+ 16 |ULTIMATE.start_aws_byte_buf_init_copy_~src#1.offset|))))) is different from true [2021-12-06 18:17:23,016 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 18:17:23,016 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 18:17:23,221 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 18:17:23,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:17:23,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:17:23,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 37 [2021-12-06 18:17:23,387 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 20 treesize of output 8 [2021-12-06 18:17:23,663 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_3862 (Array Int Int))) (= |c_#memory_int| (store |c_old(#memory_int)| |c_memcpy_impl_#in~dst.base| v_ArrVal_3862))) is different from true [2021-12-06 18:17:23,672 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_3862 (Array Int Int))) (= |c_#memory_int| (store |c_old(#memory_int)| |c_my_memcpy_#in~dst.base| v_ArrVal_3862))) is different from true [2021-12-06 18:17:23,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:17:23,689 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:17:23,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 41 [2021-12-06 18:17:23,699 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 13 treesize of output 9 [2021-12-06 18:17:42,879 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 141 proven. 71 refuted. 27 times theorem prover too weak. 105 trivial. 37 not checked. [2021-12-06 18:17:42,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:17:43,810 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3868 (Array Int Int))) (not (= (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_aws_byte_buf_init_copy_#t~mem670#1.base| v_ArrVal_3868) |c_ULTIMATE.start_aws_byte_buf_init_copy_~dest#1.base|) (+ 16 |c_ULTIMATE.start_aws_byte_buf_init_copy_~dest#1.offset|)) 18446744073709551616) 0))) is different from false [2021-12-06 18:17:43,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78921205] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:17:43,811 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:17:43,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 41] total 71 [2021-12-06 18:17:43,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640243652] [2021-12-06 18:17:43,812 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:17:43,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2021-12-06 18:17:43,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:17:43,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-12-06 18:17:43,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=5722, Unknown=20, NotChecked=620, Total=6642 [2021-12-06 18:17:43,813 INFO L87 Difference]: Start difference. First operand 409 states and 447 transitions. Second operand has 71 states, 64 states have (on average 2.8125) internal successors, (180), 57 states have internal predecessors, (180), 23 states have call successors, (50), 11 states have call predecessors, (50), 18 states have return successors, (48), 27 states have call predecessors, (48), 22 states have call successors, (48) [2021-12-06 18:18:08,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:18:08,170 INFO L93 Difference]: Finished difference Result 564 states and 646 transitions. [2021-12-06 18:18:08,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-12-06 18:18:08,170 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 64 states have (on average 2.8125) internal successors, (180), 57 states have internal predecessors, (180), 23 states have call successors, (50), 11 states have call predecessors, (50), 18 states have return successors, (48), 27 states have call predecessors, (48), 22 states have call successors, (48) Word has length 208 [2021-12-06 18:18:08,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:18:08,172 INFO L225 Difference]: With dead ends: 564 [2021-12-06 18:18:08,172 INFO L226 Difference]: Without dead ends: 459 [2021-12-06 18:18:08,174 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 240 SyntacticMatches, 11 SemanticMatches, 116 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 2914 ImplicationChecksByTransitivity, 74.6s TimeCoverageRelationStatistics Valid=706, Invalid=12162, Unknown=30, NotChecked=908, Total=13806 [2021-12-06 18:18:08,174 INFO L933 BasicCegarLoop]: 217 mSDtfsCounter, 164 mSDsluCounter, 2586 mSDsCounter, 0 mSdLazyCounter, 2663 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 2803 SdHoareTripleChecker+Invalid, 6575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 2663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3859 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-06 18:18:08,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 2803 Invalid, 6575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 2663 Invalid, 0 Unknown, 3859 Unchecked, 1.6s Time] [2021-12-06 18:18:08,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2021-12-06 18:18:08,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 422. [2021-12-06 18:18:08,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 304 states have (on average 1.049342105263158) internal successors, (319), 310 states have internal predecessors, (319), 67 states have call successors, (67), 45 states have call predecessors, (67), 50 states have return successors, (76), 66 states have call predecessors, (76), 66 states have call successors, (76) [2021-12-06 18:18:08,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 462 transitions. [2021-12-06 18:18:08,204 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 462 transitions. Word has length 208 [2021-12-06 18:18:08,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:18:08,205 INFO L470 AbstractCegarLoop]: Abstraction has 422 states and 462 transitions. [2021-12-06 18:18:08,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 64 states have (on average 2.8125) internal successors, (180), 57 states have internal predecessors, (180), 23 states have call successors, (50), 11 states have call predecessors, (50), 18 states have return successors, (48), 27 states have call predecessors, (48), 22 states have call successors, (48) [2021-12-06 18:18:08,205 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 462 transitions. [2021-12-06 18:18:08,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-12-06 18:18:08,206 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:18:08,206 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:18:08,229 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-12-06 18:18:08,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:18:08,407 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:18:08,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:18:08,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1102544473, now seen corresponding path program 1 times [2021-12-06 18:18:08,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:18:08,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687539719] [2021-12-06 18:18:08,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:18:08,413 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:18:08,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:08,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:18:08,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:08,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:18:08,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:08,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 18:18:08,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:08,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:18:08,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:08,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 18:18:08,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:08,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 18:18:08,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:08,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 18:18:08,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:08,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:18:08,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:08,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-06 18:18:08,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:08,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 18:18:08,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:08,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-06 18:18:08,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:08,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-06 18:18:08,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:08,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-06 18:18:08,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:08,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:18:08,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:08,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:18:08,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:08,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 18:18:08,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:08,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 18:18:08,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:08,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-06 18:18:08,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:08,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:18:08,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:08,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 18:18:08,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:08,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:18:08,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:08,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2021-12-06 18:18:08,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:08,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:18:08,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:08,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:18:08,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:08,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 18:18:08,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:08,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-06 18:18:08,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:08,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2021-12-06 18:18:08,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:08,997 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 295 trivial. 0 not checked. [2021-12-06 18:18:08,997 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:18:08,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687539719] [2021-12-06 18:18:08,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687539719] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:18:08,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307756597] [2021-12-06 18:18:08,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:18:08,998 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:18:08,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:18:08,998 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:18:08,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-12-06 18:18:09,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:09,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 3004 conjuncts, 65 conjunts are in the unsatisfiable core [2021-12-06 18:18:09,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:18:09,696 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 18:18:10,379 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 38 proven. 39 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2021-12-06 18:18:10,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:18:11,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307756597] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:18:11,036 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:18:11,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 30] total 45 [2021-12-06 18:18:11,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133269113] [2021-12-06 18:18:11,036 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:18:11,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-12-06 18:18:11,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:18:11,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-12-06 18:18:11,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=2825, Unknown=0, NotChecked=0, Total=2970 [2021-12-06 18:18:11,037 INFO L87 Difference]: Start difference. First operand 422 states and 462 transitions. Second operand has 45 states, 43 states have (on average 3.604651162790698) internal successors, (155), 35 states have internal predecessors, (155), 10 states have call successors, (43), 8 states have call predecessors, (43), 11 states have return successors, (41), 13 states have call predecessors, (41), 8 states have call successors, (41) [2021-12-06 18:18:15,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:18:15,502 INFO L93 Difference]: Finished difference Result 568 states and 655 transitions. [2021-12-06 18:18:15,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-12-06 18:18:15,502 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 43 states have (on average 3.604651162790698) internal successors, (155), 35 states have internal predecessors, (155), 10 states have call successors, (43), 8 states have call predecessors, (43), 11 states have return successors, (41), 13 states have call predecessors, (41), 8 states have call successors, (41) Word has length 201 [2021-12-06 18:18:15,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:18:15,504 INFO L225 Difference]: With dead ends: 568 [2021-12-06 18:18:15,504 INFO L226 Difference]: Without dead ends: 468 [2021-12-06 18:18:15,505 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1545 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=791, Invalid=8521, Unknown=0, NotChecked=0, Total=9312 [2021-12-06 18:18:15,506 INFO L933 BasicCegarLoop]: 157 mSDtfsCounter, 467 mSDsluCounter, 2427 mSDsCounter, 0 mSdLazyCounter, 5354 mSolverCounterSat, 467 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 484 SdHoareTripleChecker+Valid, 2584 SdHoareTripleChecker+Invalid, 6305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 467 IncrementalHoareTripleChecker+Valid, 5354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 484 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-06 18:18:15,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [484 Valid, 2584 Invalid, 6305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [467 Valid, 5354 Invalid, 0 Unknown, 484 Unchecked, 2.8s Time] [2021-12-06 18:18:15,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-12-06 18:18:15,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 416. [2021-12-06 18:18:15,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 299 states have (on average 1.0468227424749164) internal successors, (313), 304 states have internal predecessors, (313), 67 states have call successors, (67), 45 states have call predecessors, (67), 49 states have return successors, (75), 66 states have call predecessors, (75), 66 states have call successors, (75) [2021-12-06 18:18:15,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 455 transitions. [2021-12-06 18:18:15,531 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 455 transitions. Word has length 201 [2021-12-06 18:18:15,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:18:15,531 INFO L470 AbstractCegarLoop]: Abstraction has 416 states and 455 transitions. [2021-12-06 18:18:15,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 43 states have (on average 3.604651162790698) internal successors, (155), 35 states have internal predecessors, (155), 10 states have call successors, (43), 8 states have call predecessors, (43), 11 states have return successors, (41), 13 states have call predecessors, (41), 8 states have call successors, (41) [2021-12-06 18:18:15,531 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 455 transitions. [2021-12-06 18:18:15,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2021-12-06 18:18:15,532 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:18:15,532 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:18:15,555 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-12-06 18:18:15,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-12-06 18:18:15,733 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:18:15,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:18:15,734 INFO L85 PathProgramCache]: Analyzing trace with hash 313697747, now seen corresponding path program 1 times [2021-12-06 18:18:15,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:18:15,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636278514] [2021-12-06 18:18:15,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:18:15,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:18:16,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:16,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:18:16,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:16,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:18:16,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:16,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 18:18:16,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:16,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:18:16,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:16,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 18:18:16,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:16,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 18:18:16,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:16,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 18:18:16,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:16,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:18:16,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:16,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-06 18:18:16,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:16,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 18:18:16,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:16,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-06 18:18:16,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:16,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-06 18:18:16,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:16,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-06 18:18:16,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:16,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-12-06 18:18:16,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:16,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:18:16,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:16,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:18:16,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:16,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 18:18:16,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:16,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 18:18:16,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:16,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-06 18:18:16,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:17,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:18:17,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:17,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 18:18:17,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:17,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:18:17,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:17,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2021-12-06 18:18:17,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:17,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:18:17,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:17,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:18:17,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:17,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 18:18:17,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:17,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-06 18:18:17,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:17,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2021-12-06 18:18:17,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:17,567 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 84 proven. 21 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-12-06 18:18:17,567 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:18:17,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636278514] [2021-12-06 18:18:17,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636278514] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:18:17,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936902204] [2021-12-06 18:18:17,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:18:17,567 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:18:17,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:18:17,568 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:18:17,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-12-06 18:18:17,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:17,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 3066 conjuncts, 111 conjunts are in the unsatisfiable core [2021-12-06 18:18:17,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:18:18,031 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 18:18:18,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:18:18,304 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 12 treesize of output 14 [2021-12-06 18:18:19,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:18:19,296 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 31 treesize of output 31 [2021-12-06 18:18:19,306 INFO L354 Elim1Store]: treesize reduction 27, result has 32.5 percent of original size [2021-12-06 18:18:19,306 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 1 case distinctions, treesize of input 19 treesize of output 23 [2021-12-06 18:18:19,426 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 5 treesize of output 3 [2021-12-06 18:18:33,516 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_byte_buf_init_copy_~dest#1.base_BEFORE_CALL_42| Int) (|ULTIMATE.start_aws_byte_buf_init_copy_~src#1.base| Int) (|v_ULTIMATE.start_aws_byte_buf_init_copy_~dest#1.offset_BEFORE_CALL_27| Int)) (let ((.cse0 (select (select |c_#memory_int| |ULTIMATE.start_aws_byte_buf_init_copy_~src#1.base|) 16))) (and (< (+ |v_ULTIMATE.start_aws_byte_buf_init_copy_~dest#1.base_BEFORE_CALL_42| 1) |ULTIMATE.start_aws_byte_buf_init_copy_~src#1.base|) (= (select (select |c_#memory_int| |v_ULTIMATE.start_aws_byte_buf_init_copy_~dest#1.base_BEFORE_CALL_42|) (+ |v_ULTIMATE.start_aws_byte_buf_init_copy_~dest#1.offset_BEFORE_CALL_27| 16)) .cse0) (not (= (mod .cse0 18446744073709551616) 0))))) is different from true [2021-12-06 18:18:34,766 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 18:18:34,766 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 18:18:34,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:18:35,002 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-06 18:18:35,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 35 [2021-12-06 18:18:35,009 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 18:18:35,148 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 20 treesize of output 8 [2021-12-06 18:18:35,376 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_4231 (Array Int Int))) (= |c_#memory_int| (store |c_old(#memory_int)| |c_memcpy_impl_#in~dst.base| v_ArrVal_4231))) is different from true [2021-12-06 18:18:35,386 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_4231 (Array Int Int))) (= |c_#memory_int| (store |c_old(#memory_int)| |c_my_memcpy_#in~dst.base| v_ArrVal_4231))) is different from true [2021-12-06 18:18:35,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:18:35,404 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:18:35,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 39 [2021-12-06 18:18:35,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-12-06 18:18:36,283 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 141 proven. 53 refuted. 36 times theorem prover too weak. 111 trivial. 40 not checked. [2021-12-06 18:18:36,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:18:36,594 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4237 (Array Int Int))) (not (= (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_aws_byte_buf_init_copy_#t~mem670#1.base| v_ArrVal_4237) |c_ULTIMATE.start_aws_byte_buf_init_copy_~dest#1.base|) (+ 16 |c_ULTIMATE.start_aws_byte_buf_init_copy_~dest#1.offset|)) 18446744073709551616) 0))) is different from false [2021-12-06 18:18:36,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936902204] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:18:36,595 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:18:36,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 37] total 72 [2021-12-06 18:18:36,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586801726] [2021-12-06 18:18:36,595 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:18:36,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2021-12-06 18:18:36,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:18:36,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-12-06 18:18:36,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=4729, Unknown=11, NotChecked=564, Total=5550 [2021-12-06 18:18:36,596 INFO L87 Difference]: Start difference. First operand 416 states and 455 transitions. Second operand has 72 states, 64 states have (on average 2.96875) internal successors, (190), 57 states have internal predecessors, (190), 23 states have call successors, (51), 11 states have call predecessors, (51), 20 states have return successors, (50), 29 states have call predecessors, (50), 22 states have call successors, (50) [2021-12-06 18:21:15,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:21:15,447 INFO L93 Difference]: Finished difference Result 702 states and 782 transitions. [2021-12-06 18:21:15,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-12-06 18:21:15,447 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 64 states have (on average 2.96875) internal successors, (190), 57 states have internal predecessors, (190), 23 states have call successors, (51), 11 states have call predecessors, (51), 20 states have return successors, (50), 29 states have call predecessors, (50), 22 states have call successors, (50) Word has length 208 [2021-12-06 18:21:15,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:21:15,449 INFO L225 Difference]: With dead ends: 702 [2021-12-06 18:21:15,449 INFO L226 Difference]: Without dead ends: 593 [2021-12-06 18:21:15,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 264 SyntacticMatches, 10 SemanticMatches, 154 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 5852 ImplicationChecksByTransitivity, 173.4s TimeCoverageRelationStatistics Valid=1167, Invalid=21682, Unknown=119, NotChecked=1212, Total=24180 [2021-12-06 18:21:15,451 INFO L933 BasicCegarLoop]: 187 mSDtfsCounter, 890 mSDsluCounter, 2015 mSDsCounter, 0 mSdLazyCounter, 5620 mSolverCounterSat, 579 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 907 SdHoareTripleChecker+Valid, 2202 SdHoareTripleChecker+Invalid, 11642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 579 IncrementalHoareTripleChecker+Valid, 5620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5443 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-12-06 18:21:15,451 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [907 Valid, 2202 Invalid, 11642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [579 Valid, 5620 Invalid, 0 Unknown, 5443 Unchecked, 3.4s Time] [2021-12-06 18:21:15,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2021-12-06 18:21:15,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 552. [2021-12-06 18:21:15,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 393 states have (on average 1.0610687022900764) internal successors, (417), 398 states have internal predecessors, (417), 94 states have call successors, (94), 60 states have call predecessors, (94), 64 states have return successors, (97), 93 states have call predecessors, (97), 92 states have call successors, (97) [2021-12-06 18:21:15,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 608 transitions. [2021-12-06 18:21:15,485 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 608 transitions. Word has length 208 [2021-12-06 18:21:15,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:21:15,485 INFO L470 AbstractCegarLoop]: Abstraction has 552 states and 608 transitions. [2021-12-06 18:21:15,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 64 states have (on average 2.96875) internal successors, (190), 57 states have internal predecessors, (190), 23 states have call successors, (51), 11 states have call predecessors, (51), 20 states have return successors, (50), 29 states have call predecessors, (50), 22 states have call successors, (50) [2021-12-06 18:21:15,485 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 608 transitions. [2021-12-06 18:21:15,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2021-12-06 18:21:15,486 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:21:15,486 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:21:15,509 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-12-06 18:21:15,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-12-06 18:21:15,688 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:21:15,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:21:15,689 INFO L85 PathProgramCache]: Analyzing trace with hash 114547349, now seen corresponding path program 1 times [2021-12-06 18:21:15,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:21:15,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364506030] [2021-12-06 18:21:15,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:21:15,690 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:21:15,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:16,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:21:16,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:16,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:21:16,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:16,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 18:21:16,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:16,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:21:16,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:16,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 18:21:16,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:16,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 18:21:16,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:16,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 18:21:16,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:16,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:21:16,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:16,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-06 18:21:16,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:16,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 18:21:16,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:16,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-06 18:21:16,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:16,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-06 18:21:16,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:16,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-06 18:21:16,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:16,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-12-06 18:21:16,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:16,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:21:16,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:16,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:21:16,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:16,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 18:21:16,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:16,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 18:21:16,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:16,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-06 18:21:16,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:16,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:21:16,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:16,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 18:21:16,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:16,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:21:16,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:16,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2021-12-06 18:21:16,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:16,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:21:16,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:16,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:21:16,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:16,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 18:21:16,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:16,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-06 18:21:16,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:16,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2021-12-06 18:21:16,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:16,959 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 36 proven. 3 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2021-12-06 18:21:16,959 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:21:16,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364506030] [2021-12-06 18:21:16,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364506030] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:21:16,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338464056] [2021-12-06 18:21:16,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:21:16,960 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:21:16,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:21:16,960 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:21:16,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-12-06 18:21:17,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:17,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 3063 conjuncts, 174 conjunts are in the unsatisfiable core [2021-12-06 18:21:17,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:21:17,363 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 18:21:17,854 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 5 treesize of output 3 [2021-12-06 18:21:17,970 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-06 18:21:17,970 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 18:21:17,978 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 18:21:19,018 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 5 treesize of output 3 [2021-12-06 18:21:33,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:21:33,541 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 12 treesize of output 14 [2021-12-06 18:21:34,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:21:34,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:21:34,160 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-06 18:21:34,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 29 [2021-12-06 18:21:34,288 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 24 treesize of output 24 [2021-12-06 18:21:35,116 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 24 treesize of output 24 [2021-12-06 18:21:39,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:21:39,319 INFO L354 Elim1Store]: treesize reduction 157, result has 14.2 percent of original size [2021-12-06 18:21:39,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 56 [2021-12-06 18:21:39,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:21:39,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 18:22:03,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:22:03,525 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-12-06 18:22:03,526 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 2 case distinctions, treesize of input 16 treesize of output 18 [2021-12-06 18:22:03,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:22:03,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:22:03,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:22:03,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:22:03,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 53 [2021-12-06 18:22:03,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 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 18:22:04,107 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 30 treesize of output 12 [2021-12-06 18:22:04,993 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_4464 (Array Int Int))) (= |c_#memory_int| (store |c_old(#memory_int)| |c_memcpy_impl_#in~dst.base| v_ArrVal_4464))) is different from true [2021-12-06 18:22:05,002 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_4464 (Array Int Int))) (= (store |c_old(#memory_int)| |c_my_memcpy_#in~dst.base| v_ArrVal_4464) |c_#memory_int|)) is different from true [2021-12-06 18:22:05,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:22:05,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 43 [2021-12-06 18:22:29,842 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 45 proven. 293 refuted. 0 times theorem prover too weak. 42 trivial. 1 not checked. [2021-12-06 18:22:29,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:22:31,511 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4470 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_aws_byte_buf_init_copy_#t~mem670#1.base| v_ArrVal_4470) |c_ULTIMATE.start_aws_byte_buf_init_copy_~dest#1.base|))) (<= (mod (select .cse0 |c_ULTIMATE.start_aws_byte_buf_init_copy_~dest#1.offset|) 18446744073709551616) (mod (select .cse0 (+ 16 |c_ULTIMATE.start_aws_byte_buf_init_copy_~dest#1.offset|)) 18446744073709551616)))) is different from false [2021-12-06 18:22:31,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338464056] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:22:31,513 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:22:31,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 55] total 90 [2021-12-06 18:22:31,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439155023] [2021-12-06 18:22:31,513 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:22:31,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2021-12-06 18:22:31,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:22:31,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2021-12-06 18:22:31,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=357, Invalid=9144, Unknown=17, NotChecked=582, Total=10100 [2021-12-06 18:22:31,515 INFO L87 Difference]: Start difference. First operand 552 states and 608 transitions. Second operand has 90 states, 83 states have (on average 2.6626506024096384) internal successors, (221), 78 states have internal predecessors, (221), 27 states have call successors, (55), 15 states have call predecessors, (55), 24 states have return successors, (54), 30 states have call predecessors, (54), 26 states have call successors, (54) [2021-12-06 18:24:07,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:24:07,567 INFO L93 Difference]: Finished difference Result 681 states and 763 transitions. [2021-12-06 18:24:07,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-12-06 18:24:07,568 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 83 states have (on average 2.6626506024096384) internal successors, (221), 78 states have internal predecessors, (221), 27 states have call successors, (55), 15 states have call predecessors, (55), 24 states have return successors, (54), 30 states have call predecessors, (54), 26 states have call successors, (54) Word has length 208 [2021-12-06 18:24:07,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:24:07,570 INFO L225 Difference]: With dead ends: 681 [2021-12-06 18:24:07,570 INFO L226 Difference]: Without dead ends: 596 [2021-12-06 18:24:07,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 218 SyntacticMatches, 16 SemanticMatches, 148 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 5890 ImplicationChecksByTransitivity, 164.9s TimeCoverageRelationStatistics Valid=860, Invalid=20558, Unknown=56, NotChecked=876, Total=22350 [2021-12-06 18:24:07,571 INFO L933 BasicCegarLoop]: 188 mSDtfsCounter, 314 mSDsluCounter, 3202 mSDsCounter, 0 mSdLazyCounter, 3404 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 3390 SdHoareTripleChecker+Invalid, 7773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 3404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4151 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:24:07,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [316 Valid, 3390 Invalid, 7773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 3404 Invalid, 0 Unknown, 4151 Unchecked, 2.2s Time] [2021-12-06 18:24:07,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2021-12-06 18:24:07,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 582. [2021-12-06 18:24:07,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 582 states, 418 states have (on average 1.062200956937799) internal successors, (444), 425 states have internal predecessors, (444), 95 states have call successors, (95), 61 states have call predecessors, (95), 68 states have return successors, (104), 95 states have call predecessors, (104), 93 states have call successors, (104) [2021-12-06 18:24:07,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 643 transitions. [2021-12-06 18:24:07,608 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 643 transitions. Word has length 208 [2021-12-06 18:24:07,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:24:07,609 INFO L470 AbstractCegarLoop]: Abstraction has 582 states and 643 transitions. [2021-12-06 18:24:07,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 83 states have (on average 2.6626506024096384) internal successors, (221), 78 states have internal predecessors, (221), 27 states have call successors, (55), 15 states have call predecessors, (55), 24 states have return successors, (54), 30 states have call predecessors, (54), 26 states have call successors, (54) [2021-12-06 18:24:07,609 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 643 transitions. [2021-12-06 18:24:07,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2021-12-06 18:24:07,610 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:24:07,610 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:24:07,633 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-12-06 18:24:07,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-12-06 18:24:07,811 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:24:07,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:24:07,812 INFO L85 PathProgramCache]: Analyzing trace with hash 852654524, now seen corresponding path program 1 times [2021-12-06 18:24:07,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:24:07,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323404589] [2021-12-06 18:24:07,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:24:07,814 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:24:08,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:08,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:24:08,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:08,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:24:08,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:08,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 18:24:08,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:08,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:24:08,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:08,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 18:24:08,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:08,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 18:24:08,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:08,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 18:24:08,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:08,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:24:08,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:08,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-06 18:24:08,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:08,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 18:24:08,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:08,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-06 18:24:08,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:08,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-06 18:24:08,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:08,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-06 18:24:08,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:08,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-12-06 18:24:08,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:08,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:24:08,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:08,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:24:08,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:08,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 18:24:08,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:08,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 18:24:08,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:08,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-06 18:24:08,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:08,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:24:08,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:08,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 18:24:08,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:08,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:24:08,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:08,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2021-12-06 18:24:08,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:08,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:24:08,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:08,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:24:08,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:08,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 18:24:08,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:08,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-06 18:24:08,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:08,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2021-12-06 18:24:08,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:08,512 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 19 proven. 18 refuted. 0 times theorem prover too weak. 348 trivial. 0 not checked. [2021-12-06 18:24:08,512 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:24:08,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323404589] [2021-12-06 18:24:08,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323404589] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:24:08,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106919675] [2021-12-06 18:24:08,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:24:08,513 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:24:08,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:24:08,513 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:24:08,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-12-06 18:24:08,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:08,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 3073 conjuncts, 100 conjunts are in the unsatisfiable core [2021-12-06 18:24:08,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:24:08,942 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 18:24:09,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:24:09,119 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 12 treesize of output 14 [2021-12-06 18:24:09,994 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 18:24:09,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-06 18:24:10,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 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 18:24:10,267 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_4681 (Array Int Int))) (= (store |c_old(#memory_$Pointer$.base)| |c_memcpy_impl_#in~dst.base| v_ArrVal_4681) |c_#memory_$Pointer$.base|)) is different from true [2021-12-06 18:24:10,278 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_4681 (Array Int Int))) (= (store |c_old(#memory_$Pointer$.base)| |c_my_memcpy_#in~dst.base| v_ArrVal_4681) |c_#memory_$Pointer$.base|)) is different from true [2021-12-06 18:24:10,292 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-06 18:24:10,292 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 34 [2021-12-06 18:24:25,819 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 92 proven. 94 refuted. 0 times theorem prover too weak. 198 trivial. 1 not checked. [2021-12-06 18:24:25,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:24:28,576 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4687 (Array Int Int))) (not (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_aws_byte_buf_init_copy_#t~mem670#1.base| v_ArrVal_4687) |c_ULTIMATE.start_aws_byte_buf_init_copy_~dest#1.base|) (+ 8 |c_ULTIMATE.start_aws_byte_buf_init_copy_~dest#1.offset|)) 0))) is different from false [2021-12-06 18:24:28,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106919675] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:24:28,577 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:24:28,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 41] total 62 [2021-12-06 18:24:28,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104302124] [2021-12-06 18:24:28,578 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:24:28,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-12-06 18:24:28,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:24:28,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-12-06 18:24:28,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=4632, Unknown=7, NotChecked=414, Total=5256 [2021-12-06 18:24:28,579 INFO L87 Difference]: Start difference. First operand 582 states and 643 transitions. Second operand has 62 states, 56 states have (on average 3.2142857142857144) internal successors, (180), 49 states have internal predecessors, (180), 18 states have call successors, (53), 11 states have call predecessors, (53), 15 states have return successors, (51), 22 states have call predecessors, (51), 17 states have call successors, (51) [2021-12-06 18:25:02,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:25:02,352 INFO L93 Difference]: Finished difference Result 721 states and 804 transitions. [2021-12-06 18:25:02,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-12-06 18:25:02,352 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 56 states have (on average 3.2142857142857144) internal successors, (180), 49 states have internal predecessors, (180), 18 states have call successors, (53), 11 states have call predecessors, (53), 15 states have return successors, (51), 22 states have call predecessors, (51), 17 states have call successors, (51) Word has length 210 [2021-12-06 18:25:02,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:25:02,356 INFO L225 Difference]: With dead ends: 721 [2021-12-06 18:25:02,356 INFO L226 Difference]: Without dead ends: 584 [2021-12-06 18:25:02,357 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 238 SyntacticMatches, 7 SemanticMatches, 111 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 2467 ImplicationChecksByTransitivity, 50.1s TimeCoverageRelationStatistics Valid=638, Invalid=11342, Unknown=22, NotChecked=654, Total=12656 [2021-12-06 18:25:02,357 INFO L933 BasicCegarLoop]: 158 mSDtfsCounter, 338 mSDsluCounter, 2637 mSDsCounter, 0 mSdLazyCounter, 5331 mSolverCounterSat, 278 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 2795 SdHoareTripleChecker+Invalid, 8696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 278 IncrementalHoareTripleChecker+Valid, 5331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3087 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-06 18:25:02,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [340 Valid, 2795 Invalid, 8696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [278 Valid, 5331 Invalid, 0 Unknown, 3087 Unchecked, 2.6s Time] [2021-12-06 18:25:02,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2021-12-06 18:25:02,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 525. [2021-12-06 18:25:02,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 380 states have (on average 1.0605263157894738) internal successors, (403), 385 states have internal predecessors, (403), 85 states have call successors, (85), 54 states have call predecessors, (85), 59 states have return successors, (90), 85 states have call predecessors, (90), 83 states have call successors, (90) [2021-12-06 18:25:02,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 578 transitions. [2021-12-06 18:25:02,392 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 578 transitions. Word has length 210 [2021-12-06 18:25:02,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:25:02,392 INFO L470 AbstractCegarLoop]: Abstraction has 525 states and 578 transitions. [2021-12-06 18:25:02,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 56 states have (on average 3.2142857142857144) internal successors, (180), 49 states have internal predecessors, (180), 18 states have call successors, (53), 11 states have call predecessors, (53), 15 states have return successors, (51), 22 states have call predecessors, (51), 17 states have call successors, (51) [2021-12-06 18:25:02,393 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 578 transitions. [2021-12-06 18:25:02,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2021-12-06 18:25:02,394 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:25:02,394 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:25:02,418 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2021-12-06 18:25:02,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:25:02,595 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:25:02,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:25:02,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1715167810, now seen corresponding path program 1 times [2021-12-06 18:25:02,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:25:02,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167061366] [2021-12-06 18:25:02,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:25:02,597 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:25:03,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:25:03,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:25:03,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:25:03,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:25:03,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:25:03,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 18:25:03,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:25:03,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:25:03,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:25:03,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 18:25:03,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:25:03,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 18:25:03,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:25:03,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 18:25:03,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:25:03,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:25:03,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:25:03,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-06 18:25:03,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:25:03,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 18:25:03,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:25:03,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-06 18:25:03,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:25:03,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-06 18:25:03,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:25:03,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-06 18:25:03,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:25:03,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-12-06 18:25:03,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:25:03,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:25:03,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:25:03,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:25:03,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:25:03,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 18:25:03,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:25:03,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 18:25:03,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:25:03,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-06 18:25:03,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:25:03,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:25:03,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:25:03,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 18:25:03,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:25:03,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:25:03,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:25:03,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2021-12-06 18:25:03,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:25:03,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:25:03,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:25:03,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:25:03,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:25:03,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 18:25:03,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:25:03,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-06 18:25:03,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:25:03,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2021-12-06 18:25:03,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:25:04,006 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 40 proven. 3 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2021-12-06 18:25:04,007 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:25:04,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167061366] [2021-12-06 18:25:04,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167061366] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:25:04,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338054152] [2021-12-06 18:25:04,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:25:04,007 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:25:04,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:25:04,008 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:25:04,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-12-06 18:25:04,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:25:04,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 3078 conjuncts, 96 conjunts are in the unsatisfiable core [2021-12-06 18:25:04,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:25:04,441 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 18:25:04,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:25:04,548 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 12 treesize of output 14 [2021-12-06 18:25:04,861 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 18:25:04,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-06 18:25:04,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 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 18:25:05,047 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_4898 (Array Int Int))) (= (store |c_old(#memory_$Pointer$.base)| |c_memcpy_impl_#in~dst.base| v_ArrVal_4898) |c_#memory_$Pointer$.base|)) is different from true [2021-12-06 18:25:05,057 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_4898 (Array Int Int))) (= (store |c_old(#memory_$Pointer$.base)| |c_my_memcpy_#in~dst.base| v_ArrVal_4898) |c_#memory_$Pointer$.base|)) is different from true [2021-12-06 18:25:05,070 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-06 18:25:05,070 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 34 [2021-12-06 18:25:07,426 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 119 proven. 94 refuted. 0 times theorem prover too weak. 171 trivial. 1 not checked. [2021-12-06 18:25:07,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:25:08,044 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4904 (Array Int Int))) (not (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_aws_byte_buf_init_copy_#t~mem670#1.base| v_ArrVal_4904) |c_ULTIMATE.start_aws_byte_buf_init_copy_~dest#1.base|) (+ 8 |c_ULTIMATE.start_aws_byte_buf_init_copy_~dest#1.offset|)) 0))) is different from false [2021-12-06 18:25:08,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338054152] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:25:08,044 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:25:08,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 37] total 52 [2021-12-06 18:25:08,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763728675] [2021-12-06 18:25:08,045 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:25:08,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-12-06 18:25:08,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:25:08,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-12-06 18:25:08,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=2916, Unknown=3, NotChecked=330, Total=3422 [2021-12-06 18:25:08,046 INFO L87 Difference]: Start difference. First operand 525 states and 578 transitions. Second operand has 52 states, 48 states have (on average 3.1875) internal successors, (153), 41 states have internal predecessors, (153), 12 states have call successors, (41), 10 states have call predecessors, (41), 14 states have return successors, (36), 15 states have call predecessors, (36), 11 states have call successors, (36) [2021-12-06 18:25:57,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:25:57,545 INFO L93 Difference]: Finished difference Result 553 states and 608 transitions. [2021-12-06 18:25:57,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-12-06 18:25:57,546 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 48 states have (on average 3.1875) internal successors, (153), 41 states have internal predecessors, (153), 12 states have call successors, (41), 10 states have call predecessors, (41), 14 states have return successors, (36), 15 states have call predecessors, (36), 11 states have call successors, (36) Word has length 210 [2021-12-06 18:25:57,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:25:57,548 INFO L225 Difference]: With dead ends: 553 [2021-12-06 18:25:57,548 INFO L226 Difference]: Without dead ends: 551 [2021-12-06 18:25:57,549 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 261 SyntacticMatches, 11 SemanticMatches, 101 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 1681 ImplicationChecksByTransitivity, 50.6s TimeCoverageRelationStatistics Valid=799, Invalid=9063, Unknown=50, NotChecked=594, Total=10506 [2021-12-06 18:25:57,549 INFO L933 BasicCegarLoop]: 164 mSDtfsCounter, 388 mSDsluCounter, 1600 mSDsCounter, 0 mSdLazyCounter, 4188 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 404 SdHoareTripleChecker+Valid, 1764 SdHoareTripleChecker+Invalid, 6418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 4188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1982 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:25:57,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [404 Valid, 1764 Invalid, 6418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 4188 Invalid, 0 Unknown, 1982 Unchecked, 2.1s Time] [2021-12-06 18:25:57,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2021-12-06 18:25:57,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 519. [2021-12-06 18:25:57,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 375 states have (on average 1.0613333333333332) internal successors, (398), 379 states have internal predecessors, (398), 85 states have call successors, (85), 54 states have call predecessors, (85), 58 states have return successors, (88), 85 states have call predecessors, (88), 83 states have call successors, (88) [2021-12-06 18:25:57,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 571 transitions. [2021-12-06 18:25:57,582 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 571 transitions. Word has length 210 [2021-12-06 18:25:57,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:25:57,582 INFO L470 AbstractCegarLoop]: Abstraction has 519 states and 571 transitions. [2021-12-06 18:25:57,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 48 states have (on average 3.1875) internal successors, (153), 41 states have internal predecessors, (153), 12 states have call successors, (41), 10 states have call predecessors, (41), 14 states have return successors, (36), 15 states have call predecessors, (36), 11 states have call successors, (36) [2021-12-06 18:25:57,583 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 571 transitions. [2021-12-06 18:25:57,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2021-12-06 18:25:57,584 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:25:57,584 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:25:57,608 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-12-06 18:25:57,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:25:57,785 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:25:57,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:25:57,786 INFO L85 PathProgramCache]: Analyzing trace with hash -626913031, now seen corresponding path program 1 times [2021-12-06 18:25:57,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:25:57,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96535655] [2021-12-06 18:25:57,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:25:57,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:25:58,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:25:59,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:25:59,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:25:59,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:25:59,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:25:59,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 18:25:59,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:25:59,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:25:59,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:25:59,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 18:25:59,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:25:59,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 18:25:59,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:25:59,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 18:25:59,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:25:59,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:25:59,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:25:59,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-06 18:25:59,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:25:59,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 18:25:59,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:25:59,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-06 18:25:59,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:25:59,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-06 18:25:59,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:25:59,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-06 18:25:59,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:25:59,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-12-06 18:25:59,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:25:59,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:25:59,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:25:59,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:25:59,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:25:59,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 18:25:59,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:25:59,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 18:25:59,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:25:59,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-06 18:25:59,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:00,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:26:00,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:00,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 18:26:00,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:00,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:26:00,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:00,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2021-12-06 18:26:00,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:00,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:26:00,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:00,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:26:00,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:00,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 18:26:00,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:00,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-06 18:26:00,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:00,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 190 [2021-12-06 18:26:00,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:01,199 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 35 proven. 55 refuted. 0 times theorem prover too weak. 294 trivial. 0 not checked. [2021-12-06 18:26:01,199 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:26:01,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96535655] [2021-12-06 18:26:01,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96535655] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:26:01,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314034259] [2021-12-06 18:26:01,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:26:01,200 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:26:01,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:26:01,200 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:26:01,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c31be19-c9c4-4a7b-a036-c477f85d8f7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-12-06 18:26:01,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:01,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 3087 conjuncts, 172 conjunts are in the unsatisfiable core [2021-12-06 18:26:01,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:26:01,851 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 18:26:35,062 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 18:26:40,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:26:40,034 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 12 treesize of output 14 [2021-12-06 18:26:40,167 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:26:40,167 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 24 treesize of output 28 [2021-12-06 18:26:40,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:26:40,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-12-06 18:26:40,552 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:26:40,552 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 28 treesize of output 32 [2021-12-06 18:26:42,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:26:42,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:26:42,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:26:42,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:26:42,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:26:42,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:26:42,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:26:42,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 56 [2021-12-06 18:26:42,352 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 5 treesize of output 3 [2021-12-06 18:26:50,459 WARN L860 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_aws_byte_buf_init_copy_~src#1.base| Int) (|v_ULTIMATE.start_aws_byte_buf_init_copy_~dest#1.base_BEFORE_CALL_70| Int)) (let ((.cse0 (select |c_#memory_int| |ULTIMATE.start_aws_byte_buf_init_copy_~src#1.base|)) (.cse3 (select |c_#memory_int| |v_ULTIMATE.start_aws_byte_buf_init_copy_~dest#1.base_BEFORE_CALL_70|))) (let ((.cse1 (select .cse3 0)) (.cse2 (select .cse0 16))) (and (= (select .cse0 0) .cse1) (<= (mod .cse1 18446744073709551616) (mod .cse2 18446744073709551616)) (= (select .cse3 16) .cse2) (< (+ |v_ULTIMATE.start_aws_byte_buf_init_copy_~dest#1.base_BEFORE_CALL_70| 1) |ULTIMATE.start_aws_byte_buf_init_copy_~src#1.base|))))) is different from true [2021-12-06 18:27:13,109 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 18:27:13,109 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 18:27:13,379 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 18:27:13,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:27:13,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:27:13,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:27:13,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:27:13,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 53 [2021-12-06 18:27:13,614 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 20 treesize of output 8 [2021-12-06 18:27:16,301 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_5162 (Array Int Int))) (= |c_#memory_int| (store |c_old(#memory_int)| |c_memcpy_impl_#in~dst.base| v_ArrVal_5162))) is different from true [2021-12-06 18:27:16,312 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_5162 (Array Int Int))) (= |c_#memory_int| (store |c_old(#memory_int)| |c_my_memcpy_#in~dst.base| v_ArrVal_5162))) is different from true [2021-12-06 18:27:16,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:27:16,335 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:27:16,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 49 [2021-12-06 18:27:16,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-12-06 18:27:34,005 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 104 proven. 110 refuted. 36 times theorem prover too weak. 68 trivial. 66 not checked. [2021-12-06 18:27:34,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:27:34,644 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_5169 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_aws_byte_buf_init_copy_#t~mem670#1.base| v_ArrVal_5169) |c_ULTIMATE.start_aws_byte_buf_init_copy_~dest#1.base|))) (<= (mod (select .cse0 |c_ULTIMATE.start_aws_byte_buf_init_copy_~dest#1.offset|) 18446744073709551616) (mod (select .cse0 (+ 16 |c_ULTIMATE.start_aws_byte_buf_init_copy_~dest#1.offset|)) 18446744073709551616)))) is different from false [2021-12-06 18:27:34,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314034259] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:27:34,646 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:27:34,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50] total 98 [2021-12-06 18:27:34,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763686049] [2021-12-06 18:27:34,646 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:27:34,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2021-12-06 18:27:34,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:27:34,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2021-12-06 18:27:34,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=375, Invalid=8918, Unknown=35, NotChecked=772, Total=10100 [2021-12-06 18:27:34,647 INFO L87 Difference]: Start difference. First operand 519 states and 571 transitions. Second operand has 98 states, 90 states have (on average 2.5) internal successors, (225), 84 states have internal predecessors, (225), 29 states have call successors, (55), 12 states have call predecessors, (55), 24 states have return successors, (54), 33 states have call predecessors, (54), 28 states have call successors, (54)