./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_array_list_clean_up_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_array_list_clean_up_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF --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 5ba879a31f48d1f1f7d1dc7f928910bfb7ed0629fadb04ed483f94e60bfd5ef0 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 06:06:48,868 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 06:06:48,871 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 06:06:48,910 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 06:06:48,911 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 06:06:48,913 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 06:06:48,915 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 06:06:48,918 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 06:06:48,921 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 06:06:48,923 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 06:06:48,925 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 06:06:48,927 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 06:06:48,930 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 06:06:48,934 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 06:06:48,937 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 06:06:48,940 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 06:06:48,944 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 06:06:48,951 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 06:06:48,954 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 06:06:48,958 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 06:06:48,965 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 06:06:48,967 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 06:06:48,972 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 06:06:48,973 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 06:06:48,988 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 06:06:48,989 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 06:06:48,990 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 06:06:48,992 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 06:06:48,993 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 06:06:48,995 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 06:06:48,997 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 06:06:48,998 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 06:06:49,000 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 06:06:49,003 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 06:06:49,005 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 06:06:49,005 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 06:06:49,006 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 06:06:49,007 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 06:06:49,007 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 06:06:49,008 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 06:06:49,009 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 06:06:49,011 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-20 06:06:49,068 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 06:06:49,068 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 06:06:49,069 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 06:06:49,069 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 06:06:49,078 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 06:06:49,079 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 06:06:49,080 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 06:06:49,081 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 06:06:49,081 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 06:06:49,081 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 06:06:49,083 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 06:06:49,083 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 06:06:49,083 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 06:06:49,084 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 06:06:49,084 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 06:06:49,084 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 06:06:49,084 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 06:06:49,085 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 06:06:49,085 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 06:06:49,085 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 06:06:49,086 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 06:06:49,086 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:06:49,086 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 06:06:49,087 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 06:06:49,087 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 06:06:49,087 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 06:06:49,088 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 06:06:49,088 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 06:06:49,088 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 06:06:49,090 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 06:06:49,091 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 06:06:49,091 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_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5ba879a31f48d1f1f7d1dc7f928910bfb7ed0629fadb04ed483f94e60bfd5ef0 [2021-11-20 06:06:49,413 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 06:06:49,454 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 06:06:49,458 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 06:06:49,460 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 06:06:49,461 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 06:06:49,463 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/aws-c-common/aws_array_list_clean_up_harness.i [2021-11-20 06:06:49,559 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/data/217442b90/e822635685764e2c8eb924b896abe0c2/FLAG9af52fa49 [2021-11-20 06:06:50,405 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 06:06:50,406 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/sv-benchmarks/c/aws-c-common/aws_array_list_clean_up_harness.i [2021-11-20 06:06:50,468 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/data/217442b90/e822635685764e2c8eb924b896abe0c2/FLAG9af52fa49 [2021-11-20 06:06:50,951 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/data/217442b90/e822635685764e2c8eb924b896abe0c2 [2021-11-20 06:06:50,954 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 06:06:50,956 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 06:06:50,958 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 06:06:50,959 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 06:06:50,963 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 06:06:50,965 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:06:50" (1/1) ... [2021-11-20 06:06:50,967 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35800602 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:06:50, skipping insertion in model container [2021-11-20 06:06:50,967 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:06:50" (1/1) ... [2021-11-20 06:06:50,980 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 06:06:51,137 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 06:06:51,548 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_6a7069e7-bf2b-40cd-a985-b703942c57e7/sv-benchmarks/c/aws-c-common/aws_array_list_clean_up_harness.i[4497,4510] [2021-11-20 06:06:51,558 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_6a7069e7-bf2b-40cd-a985-b703942c57e7/sv-benchmarks/c/aws-c-common/aws_array_list_clean_up_harness.i[4557,4570] [2021-11-20 06:06:52,487 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-20 06:06:52,564 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:06:52,565 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:06:52,566 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:06:52,567 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:06:52,569 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:06:52,586 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:06:52,586 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:06:52,589 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:06:52,590 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:06:52,592 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:06:52,593 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:06:52,594 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:06:52,595 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:06:52,993 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-20 06:06:52,995 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-20 06:06:52,997 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-20 06:06:52,999 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-20 06:06:53,001 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-20 06:06:53,002 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-20 06:06:53,004 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-20 06:06:53,005 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-20 06:06:53,006 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-20 06:06:53,007 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-20 06:06:53,179 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:06:53,190 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:06:53,258 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:06:53,296 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 06:06:53,327 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_6a7069e7-bf2b-40cd-a985-b703942c57e7/sv-benchmarks/c/aws-c-common/aws_array_list_clean_up_harness.i[4497,4510] [2021-11-20 06:06:53,336 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_6a7069e7-bf2b-40cd-a985-b703942c57e7/sv-benchmarks/c/aws-c-common/aws_array_list_clean_up_harness.i[4557,4570] [2021-11-20 06:06:53,477 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-20 06:06:53,555 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:06:53,555 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:06:53,556 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:06:53,563 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:06:53,564 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:06:53,572 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:06:53,587 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:06:53,589 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:06:53,590 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:06:53,595 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:06:53,595 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:06:53,596 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:06:53,597 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:06:53,673 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-20 06:06:53,675 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-20 06:06:53,678 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-20 06:06:53,687 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-20 06:06:53,689 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-20 06:06:53,691 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-20 06:06:53,692 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-20 06:06:53,692 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-20 06:06:53,693 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-20 06:06:53,694 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-20 06:06:53,723 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:06:53,729 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:06:53,760 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:06:54,126 INFO L208 MainTranslator]: Completed translation [2021-11-20 06:06:54,126 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:06:54 WrapperNode [2021-11-20 06:06:54,127 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 06:06:54,128 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 06:06:54,128 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 06:06:54,128 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 06:06:54,138 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:06:54" (1/1) ... [2021-11-20 06:06:54,298 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:06:54" (1/1) ... [2021-11-20 06:06:54,418 INFO L137 Inliner]: procedures = 690, calls = 1553, calls flagged for inlining = 48, calls inlined = 7, statements flattened = 577 [2021-11-20 06:06:54,418 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 06:06:54,419 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 06:06:54,420 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 06:06:54,420 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 06:06:54,430 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:06:54" (1/1) ... [2021-11-20 06:06:54,431 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:06:54" (1/1) ... [2021-11-20 06:06:54,443 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:06:54" (1/1) ... [2021-11-20 06:06:54,443 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:06:54" (1/1) ... [2021-11-20 06:06:54,482 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:06:54" (1/1) ... [2021-11-20 06:06:54,489 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:06:54" (1/1) ... [2021-11-20 06:06:54,497 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:06:54" (1/1) ... [2021-11-20 06:06:54,508 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 06:06:54,509 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 06:06:54,509 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 06:06:54,510 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 06:06:54,511 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:06:54" (1/1) ... [2021-11-20 06:06:54,520 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:06:54,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:06:54,573 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 06:06:54,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 06:06:54,642 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_mem_zeroed [2021-11-20 06:06:54,643 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_mem_zeroed [2021-11-20 06:06:54,643 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 06:06:54,645 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_bounded [2021-11-20 06:06:54,646 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_bounded [2021-11-20 06:06:54,646 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_valid [2021-11-20 06:06:54,647 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_valid [2021-11-20 06:06:54,648 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-11-20 06:06:54,648 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-11-20 06:06:54,648 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 06:06:54,649 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2021-11-20 06:06:54,649 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2021-11-20 06:06:54,649 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-20 06:06:54,649 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-20 06:06:54,650 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 06:06:54,650 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 06:06:54,650 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-20 06:06:54,650 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 06:06:54,650 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 06:06:54,651 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-11-20 06:06:54,651 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-11-20 06:06:54,651 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2021-11-20 06:06:54,651 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2021-11-20 06:06:54,653 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mem_release [2021-11-20 06:06:54,653 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mem_release [2021-11-20 06:06:54,654 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-20 06:06:54,654 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-20 06:06:54,654 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-20 06:06:54,654 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-20 06:06:54,655 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 06:06:54,655 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-20 06:06:54,655 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-20 06:06:54,655 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2021-11-20 06:06:54,656 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2021-11-20 06:06:54,656 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2021-11-20 06:06:54,656 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2021-11-20 06:06:54,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 06:06:54,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 06:06:55,049 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 06:06:55,060 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 06:06:56,460 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 06:06:56,472 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 06:06:56,473 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-20 06:06:56,476 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:06:56 BoogieIcfgContainer [2021-11-20 06:06:56,476 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 06:06:56,482 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 06:06:56,483 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 06:06:56,487 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 06:06:56,487 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 06:06:50" (1/3) ... [2021-11-20 06:06:56,488 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78a7e0ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:06:56, skipping insertion in model container [2021-11-20 06:06:56,488 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:06:54" (2/3) ... [2021-11-20 06:06:56,489 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78a7e0ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:06:56, skipping insertion in model container [2021-11-20 06:06:56,489 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:06:56" (3/3) ... [2021-11-20 06:06:56,491 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_array_list_clean_up_harness.i [2021-11-20 06:06:56,502 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 06:06:56,502 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 06:06:56,573 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 06:06:56,593 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 06:06:56,593 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 06:06:56,627 INFO L276 IsEmpty]: Start isEmpty. Operand has 114 states, 78 states have (on average 1.2564102564102564) internal successors, (98), 78 states have internal predecessors, (98), 22 states have call successors, (22), 13 states have call predecessors, (22), 13 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-11-20 06:06:56,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-20 06:06:56,640 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:06:56,641 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:06:56,641 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:06:56,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:06:56,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1460968734, now seen corresponding path program 1 times [2021-11-20 06:06:56,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:06:56,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067814370] [2021-11-20 06:06:56,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:06:56,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:06:56,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:57,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:06:57,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:57,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:06:57,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:57,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-20 06:06:57,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:57,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-20 06:06:57,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:57,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-20 06:06:57,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:57,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-20 06:06:57,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:57,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-20 06:06:57,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:57,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-20 06:06:57,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:57,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-11-20 06:06:57,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:57,411 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-20 06:06:57,411 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:06:57,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067814370] [2021-11-20 06:06:57,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067814370] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:06:57,413 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:06:57,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:06:57,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250561661] [2021-11-20 06:06:57,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:06:57,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:06:57,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:06:57,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:06:57,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:06:57,458 INFO L87 Difference]: Start difference. First operand has 114 states, 78 states have (on average 1.2564102564102564) internal successors, (98), 78 states have internal predecessors, (98), 22 states have call successors, (22), 13 states have call predecessors, (22), 13 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 2 states have internal predecessors, (33), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-20 06:06:57,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:06:57,781 INFO L93 Difference]: Finished difference Result 228 states and 297 transitions. [2021-11-20 06:06:57,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:06:57,784 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 2 states have internal predecessors, (33), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 65 [2021-11-20 06:06:57,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:06:57,796 INFO L225 Difference]: With dead ends: 228 [2021-11-20 06:06:57,796 INFO L226 Difference]: Without dead ends: 114 [2021-11-20 06:06:57,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:06:57,809 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 35 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:06:57,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 162 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 06:06:57,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-11-20 06:06:57,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 107. [2021-11-20 06:06:57,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 72 states have (on average 1.2083333333333333) internal successors, (87), 72 states have internal predecessors, (87), 22 states have call successors, (22), 13 states have call predecessors, (22), 12 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-11-20 06:06:57,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 130 transitions. [2021-11-20 06:06:57,887 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 130 transitions. Word has length 65 [2021-11-20 06:06:57,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:06:57,888 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 130 transitions. [2021-11-20 06:06:57,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 2 states have internal predecessors, (33), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-20 06:06:57,888 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 130 transitions. [2021-11-20 06:06:57,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-20 06:06:57,894 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:06:57,894 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:06:57,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 06:06:57,897 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:06:57,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:06:57,898 INFO L85 PathProgramCache]: Analyzing trace with hash -1894775411, now seen corresponding path program 1 times [2021-11-20 06:06:57,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:06:57,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353085003] [2021-11-20 06:06:57,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:06:57,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:06:57,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:58,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:06:58,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:58,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:06:58,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:58,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-20 06:06:58,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:58,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-20 06:06:58,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:58,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-20 06:06:58,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:58,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-20 06:06:58,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:58,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-20 06:06:58,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:58,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-20 06:06:58,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:58,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-20 06:06:58,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:58,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-11-20 06:06:58,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:58,446 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-20 06:06:58,446 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:06:58,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353085003] [2021-11-20 06:06:58,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353085003] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:06:58,447 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:06:58,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 06:06:58,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240589929] [2021-11-20 06:06:58,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:06:58,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:06:58,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:06:58,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:06:58,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:06:58,451 INFO L87 Difference]: Start difference. First operand 107 states and 130 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 5 states have internal predecessors, (37), 2 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-20 06:06:59,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:06:59,129 INFO L93 Difference]: Finished difference Result 199 states and 243 transitions. [2021-11-20 06:06:59,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 06:06:59,130 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 5 states have internal predecessors, (37), 2 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 71 [2021-11-20 06:06:59,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:06:59,134 INFO L225 Difference]: With dead ends: 199 [2021-11-20 06:06:59,134 INFO L226 Difference]: Without dead ends: 126 [2021-11-20 06:06:59,135 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:06:59,137 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 88 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:06:59,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 366 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-20 06:06:59,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-11-20 06:06:59,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 109. [2021-11-20 06:06:59,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 73 states have (on average 1.2054794520547945) internal successors, (88), 74 states have internal predecessors, (88), 22 states have call successors, (22), 13 states have call predecessors, (22), 13 states have return successors, (22), 21 states have call predecessors, (22), 21 states have call successors, (22) [2021-11-20 06:06:59,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 132 transitions. [2021-11-20 06:06:59,161 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 132 transitions. Word has length 71 [2021-11-20 06:06:59,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:06:59,162 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 132 transitions. [2021-11-20 06:06:59,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 5 states have internal predecessors, (37), 2 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-20 06:06:59,163 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 132 transitions. [2021-11-20 06:06:59,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-20 06:06:59,173 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:06:59,174 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:06:59,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 06:06:59,175 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:06:59,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:06:59,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1692678563, now seen corresponding path program 1 times [2021-11-20 06:06:59,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:06:59,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363886445] [2021-11-20 06:06:59,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:06:59,182 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:06:59,315 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:06:59,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1748617951] [2021-11-20 06:06:59,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:06:59,316 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:06:59,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:06:59,320 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:06:59,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 06:06:59,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:59,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 2085 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-20 06:06:59,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:07:00,190 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-20 06:07:00,191 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:07:00,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:07:00,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363886445] [2021-11-20 06:07:00,192 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:07:00,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748617951] [2021-11-20 06:07:00,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748617951] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:07:00,193 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:07:00,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-20 06:07:00,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547913567] [2021-11-20 06:07:00,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:07:00,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 06:07:00,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:07:00,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 06:07:00,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:07:00,196 INFO L87 Difference]: Start difference. First operand 109 states and 132 transitions. Second operand has 8 states, 7 states have (on average 6.857142857142857) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 1 states have call successors, (12) [2021-11-20 06:07:00,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:07:00,267 INFO L93 Difference]: Finished difference Result 190 states and 229 transitions. [2021-11-20 06:07:00,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 06:07:00,268 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.857142857142857) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 1 states have call successors, (12) Word has length 86 [2021-11-20 06:07:00,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:07:00,271 INFO L225 Difference]: With dead ends: 190 [2021-11-20 06:07:00,272 INFO L226 Difference]: Without dead ends: 117 [2021-11-20 06:07:00,273 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:07:00,274 INFO L933 BasicCegarLoop]: 129 mSDtfsCounter, 4 mSDsluCounter, 761 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 890 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:07:00,275 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 890 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:07:00,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-11-20 06:07:00,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 113. [2021-11-20 06:07:00,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 76 states have (on average 1.1973684210526316) internal successors, (91), 77 states have internal predecessors, (91), 22 states have call successors, (22), 13 states have call predecessors, (22), 14 states have return successors, (23), 22 states have call predecessors, (23), 21 states have call successors, (23) [2021-11-20 06:07:00,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 136 transitions. [2021-11-20 06:07:00,293 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 136 transitions. Word has length 86 [2021-11-20 06:07:00,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:07:00,302 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 136 transitions. [2021-11-20 06:07:00,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.857142857142857) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 1 states have call successors, (12) [2021-11-20 06:07:00,303 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 136 transitions. [2021-11-20 06:07:00,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-20 06:07:00,306 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:07:00,307 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:07:00,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 06:07:00,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:07:00,527 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:07:00,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:07:00,528 INFO L85 PathProgramCache]: Analyzing trace with hash -124616364, now seen corresponding path program 1 times [2021-11-20 06:07:00,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:07:00,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101135642] [2021-11-20 06:07:00,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:07:00,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:07:00,636 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:07:00,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2045671027] [2021-11-20 06:07:00,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:07:00,637 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:07:00,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:07:00,647 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:07:00,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 06:07:01,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:01,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 2088 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-20 06:07:01,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:07:01,425 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-20 06:07:01,425 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:07:01,426 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:07:01,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101135642] [2021-11-20 06:07:01,426 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:07:01,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045671027] [2021-11-20 06:07:01,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045671027] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:07:01,426 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:07:01,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:07:01,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522163423] [2021-11-20 06:07:01,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:07:01,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:07:01,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:07:01,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:07:01,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:07:01,429 INFO L87 Difference]: Start difference. First operand 113 states and 136 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-20 06:07:01,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:07:01,460 INFO L93 Difference]: Finished difference Result 134 states and 158 transitions. [2021-11-20 06:07:01,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:07:01,461 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 86 [2021-11-20 06:07:01,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:07:01,464 INFO L225 Difference]: With dead ends: 134 [2021-11-20 06:07:01,464 INFO L226 Difference]: Without dead ends: 114 [2021-11-20 06:07:01,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:07:01,466 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 2 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:07:01,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 382 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:07:01,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-11-20 06:07:01,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2021-11-20 06:07:01,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 77 states have (on average 1.1948051948051948) internal successors, (92), 78 states have internal predecessors, (92), 22 states have call successors, (22), 13 states have call predecessors, (22), 14 states have return successors, (23), 22 states have call predecessors, (23), 21 states have call successors, (23) [2021-11-20 06:07:01,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 137 transitions. [2021-11-20 06:07:01,482 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 137 transitions. Word has length 86 [2021-11-20 06:07:01,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:07:01,483 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 137 transitions. [2021-11-20 06:07:01,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-20 06:07:01,483 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 137 transitions. [2021-11-20 06:07:01,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-20 06:07:01,485 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:07:01,486 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:07:01,536 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 06:07:01,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:07:01,711 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:07:01,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:07:01,712 INFO L85 PathProgramCache]: Analyzing trace with hash -117447722, now seen corresponding path program 1 times [2021-11-20 06:07:01,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:07:01,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971996315] [2021-11-20 06:07:01,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:07:01,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:07:01,780 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:07:01,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1226227899] [2021-11-20 06:07:01,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:07:01,781 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:07:01,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:07:01,782 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:07:01,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 06:07:02,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:02,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 2095 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-20 06:07:02,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:07:02,524 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-20 06:07:02,524 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:07:02,524 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:07:02,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971996315] [2021-11-20 06:07:02,525 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:07:02,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226227899] [2021-11-20 06:07:02,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226227899] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:07:02,525 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:07:02,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:07:02,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458063075] [2021-11-20 06:07:02,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:07:02,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:07:02,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:07:02,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:07:02,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:07:02,528 INFO L87 Difference]: Start difference. First operand 114 states and 137 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-20 06:07:02,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:07:02,575 INFO L93 Difference]: Finished difference Result 166 states and 198 transitions. [2021-11-20 06:07:02,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:07:02,576 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 87 [2021-11-20 06:07:02,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:07:02,579 INFO L225 Difference]: With dead ends: 166 [2021-11-20 06:07:02,579 INFO L226 Difference]: Without dead ends: 119 [2021-11-20 06:07:02,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:07:02,584 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 7 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:07:02,584 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 370 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:07:02,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-11-20 06:07:02,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 115. [2021-11-20 06:07:02,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 78 states have (on average 1.1923076923076923) internal successors, (93), 79 states have internal predecessors, (93), 22 states have call successors, (22), 13 states have call predecessors, (22), 14 states have return successors, (23), 22 states have call predecessors, (23), 21 states have call successors, (23) [2021-11-20 06:07:02,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 138 transitions. [2021-11-20 06:07:02,623 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 138 transitions. Word has length 87 [2021-11-20 06:07:02,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:07:02,624 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 138 transitions. [2021-11-20 06:07:02,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-20 06:07:02,624 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 138 transitions. [2021-11-20 06:07:02,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-20 06:07:02,626 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:07:02,626 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:07:02,678 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 06:07:02,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:07:02,847 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:07:02,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:07:02,848 INFO L85 PathProgramCache]: Analyzing trace with hash 995990719, now seen corresponding path program 1 times [2021-11-20 06:07:02,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:07:02,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476898194] [2021-11-20 06:07:02,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:07:02,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:07:02,942 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:07:02,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [85328251] [2021-11-20 06:07:02,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:07:02,943 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:07:02,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:07:02,944 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:07:02,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 06:07:03,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:03,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 2098 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 06:07:03,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:07:03,699 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-20 06:07:03,700 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:07:03,700 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:07:03,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476898194] [2021-11-20 06:07:03,700 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:07:03,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85328251] [2021-11-20 06:07:03,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85328251] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:07:03,701 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:07:03,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 06:07:03,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673878677] [2021-11-20 06:07:03,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:07:03,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:07:03,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:07:03,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:07:03,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:07:03,708 INFO L87 Difference]: Start difference. First operand 115 states and 138 transitions. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-20 06:07:03,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:07:03,755 INFO L93 Difference]: Finished difference Result 160 states and 190 transitions. [2021-11-20 06:07:03,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:07:03,756 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) Word has length 87 [2021-11-20 06:07:03,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:07:03,758 INFO L225 Difference]: With dead ends: 160 [2021-11-20 06:07:03,758 INFO L226 Difference]: Without dead ends: 117 [2021-11-20 06:07:03,760 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:07:03,763 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 4 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:07:03,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 510 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:07:03,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-11-20 06:07:03,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 115. [2021-11-20 06:07:03,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 78 states have (on average 1.1794871794871795) internal successors, (92), 79 states have internal predecessors, (92), 22 states have call successors, (22), 13 states have call predecessors, (22), 14 states have return successors, (23), 22 states have call predecessors, (23), 21 states have call successors, (23) [2021-11-20 06:07:03,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 137 transitions. [2021-11-20 06:07:03,783 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 137 transitions. Word has length 87 [2021-11-20 06:07:03,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:07:03,784 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 137 transitions. [2021-11-20 06:07:03,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-20 06:07:03,784 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 137 transitions. [2021-11-20 06:07:03,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-20 06:07:03,789 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:07:03,789 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:07:03,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 06:07:04,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-20 06:07:04,003 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:07:04,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:07:04,004 INFO L85 PathProgramCache]: Analyzing trace with hash -462422751, now seen corresponding path program 1 times [2021-11-20 06:07:04,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:07:04,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53122180] [2021-11-20 06:07:04,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:07:04,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:07:04,063 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:07:04,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [136726693] [2021-11-20 06:07:04,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:07:04,064 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:07:04,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:07:04,065 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:07:04,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 06:07:04,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:04,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 2102 conjuncts, 69 conjunts are in the unsatisfiable core [2021-11-20 06:07:04,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:07:06,785 WARN L860 $PredicateComparison]: unable to prove that (exists ((|#Ultimate.C_memset_#ptr.offset| Int)) (= |c_#memory_int| (store |c_old(#memory_int)| |c_#Ultimate.C_memset_#ptr.base| (store (select |c_old(#memory_int)| |c_#Ultimate.C_memset_#ptr.base|) |#Ultimate.C_memset_#ptr.offset| |c_#Ultimate.C_memset_#value|)))) is different from true [2021-11-20 06:07:06,880 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-20 06:07:06,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 24 [2021-11-20 06:07:07,592 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 1 not checked. [2021-11-20 06:07:07,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:07:19,801 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-11-20 06:07:19,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2021-11-20 06:07:20,097 INFO L354 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2021-11-20 06:07:20,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 73 [2021-11-20 06:07:20,674 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-20 06:07:20,675 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:07:20,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53122180] [2021-11-20 06:07:20,675 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:07:20,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136726693] [2021-11-20 06:07:20,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136726693] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:07:20,676 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:07:20,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 14] total 31 [2021-11-20 06:07:20,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356361539] [2021-11-20 06:07:20,677 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:07:20,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-20 06:07:20,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:07:20,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-20 06:07:20,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=756, Unknown=1, NotChecked=56, Total=930 [2021-11-20 06:07:20,681 INFO L87 Difference]: Start difference. First operand 115 states and 137 transitions. Second operand has 31 states, 29 states have (on average 3.0344827586206895) internal successors, (88), 27 states have internal predecessors, (88), 8 states have call successors, (23), 6 states have call predecessors, (23), 8 states have return successors, (22), 8 states have call predecessors, (22), 7 states have call successors, (22) [2021-11-20 06:07:34,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:07:34,926 INFO L93 Difference]: Finished difference Result 173 states and 215 transitions. [2021-11-20 06:07:34,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-20 06:07:34,927 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 3.0344827586206895) internal successors, (88), 27 states have internal predecessors, (88), 8 states have call successors, (23), 6 states have call predecessors, (23), 8 states have return successors, (22), 8 states have call predecessors, (22), 7 states have call successors, (22) Word has length 90 [2021-11-20 06:07:34,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:07:34,929 INFO L225 Difference]: With dead ends: 173 [2021-11-20 06:07:34,930 INFO L226 Difference]: Without dead ends: 166 [2021-11-20 06:07:34,931 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 146 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 26.4s TimeCoverageRelationStatistics Valid=219, Invalid=1497, Unknown=10, NotChecked=80, Total=1806 [2021-11-20 06:07:34,932 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 134 mSDsluCounter, 1104 mSDsCounter, 0 mSdLazyCounter, 953 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 1235 SdHoareTripleChecker+Invalid, 1501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 953 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 502 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:07:34,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 1235 Invalid, 1501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 953 Invalid, 0 Unknown, 502 Unchecked, 1.3s Time] [2021-11-20 06:07:34,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-11-20 06:07:34,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 159. [2021-11-20 06:07:34,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 111 states have (on average 1.1891891891891893) internal successors, (132), 114 states have internal predecessors, (132), 28 states have call successors, (28), 15 states have call predecessors, (28), 19 states have return successors, (38), 29 states have call predecessors, (38), 27 states have call successors, (38) [2021-11-20 06:07:34,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 198 transitions. [2021-11-20 06:07:34,984 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 198 transitions. Word has length 90 [2021-11-20 06:07:34,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:07:34,985 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 198 transitions. [2021-11-20 06:07:34,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 3.0344827586206895) internal successors, (88), 27 states have internal predecessors, (88), 8 states have call successors, (23), 6 states have call predecessors, (23), 8 states have return successors, (22), 8 states have call predecessors, (22), 7 states have call successors, (22) [2021-11-20 06:07:34,986 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 198 transitions. [2021-11-20 06:07:34,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-20 06:07:34,988 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:07:34,988 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:07:35,039 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 06:07:35,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:07:35,206 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:07:35,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:07:35,207 INFO L85 PathProgramCache]: Analyzing trace with hash 134736496, now seen corresponding path program 1 times [2021-11-20 06:07:35,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:07:35,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833333135] [2021-11-20 06:07:35,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:07:35,207 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:07:35,272 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:07:35,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [130661405] [2021-11-20 06:07:35,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:07:35,273 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:07:35,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:07:35,274 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:07:35,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 06:07:35,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:35,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 2132 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 06:07:35,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:07:35,970 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-20 06:07:35,970 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:07:35,970 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:07:35,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833333135] [2021-11-20 06:07:35,971 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:07:35,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130661405] [2021-11-20 06:07:35,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130661405] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:07:35,971 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:07:35,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 06:07:35,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202245251] [2021-11-20 06:07:35,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:07:35,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:07:35,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:07:35,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:07:35,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:07:35,973 INFO L87 Difference]: Start difference. First operand 159 states and 198 transitions. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 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) [2021-11-20 06:07:36,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:07:36,226 INFO L93 Difference]: Finished difference Result 232 states and 286 transitions. [2021-11-20 06:07:36,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 06:07:36,227 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 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 93 [2021-11-20 06:07:36,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:07:36,232 INFO L225 Difference]: With dead ends: 232 [2021-11-20 06:07:36,232 INFO L226 Difference]: Without dead ends: 157 [2021-11-20 06:07:36,233 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:07:36,234 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 157 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:07:36,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 451 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 06:07:36,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-11-20 06:07:36,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2021-11-20 06:07:36,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 110 states have (on average 1.1818181818181819) internal successors, (130), 112 states have internal predecessors, (130), 28 states have call successors, (28), 15 states have call predecessors, (28), 18 states have return successors, (36), 29 states have call predecessors, (36), 27 states have call successors, (36) [2021-11-20 06:07:36,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 194 transitions. [2021-11-20 06:07:36,258 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 194 transitions. Word has length 93 [2021-11-20 06:07:36,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:07:36,261 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 194 transitions. [2021-11-20 06:07:36,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 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) [2021-11-20 06:07:36,262 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 194 transitions. [2021-11-20 06:07:36,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-20 06:07:36,266 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:07:36,266 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:07:36,315 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-20 06:07:36,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:07:36,479 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:07:36,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:07:36,479 INFO L85 PathProgramCache]: Analyzing trace with hash -910834864, now seen corresponding path program 2 times [2021-11-20 06:07:36,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:07:36,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729830546] [2021-11-20 06:07:36,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:07:36,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:07:36,538 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:07:36,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1400738973] [2021-11-20 06:07:36,538 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:07:36,539 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:07:36,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:07:36,540 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:07:36,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 06:07:37,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:07:37,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:07:37,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 2109 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-20 06:07:37,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:07:37,465 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-20 06:07:37,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:07:37,840 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-20 06:07:37,840 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:07:37,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729830546] [2021-11-20 06:07:37,841 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:07:37,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400738973] [2021-11-20 06:07:37,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400738973] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:07:37,841 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:07:37,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-11-20 06:07:37,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517065690] [2021-11-20 06:07:37,842 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:07:37,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 06:07:37,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:07:37,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 06:07:37,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:07:37,845 INFO L87 Difference]: Start difference. First operand 157 states and 194 transitions. Second operand has 8 states, 8 states have (on average 7.875) internal successors, (63), 8 states have internal predecessors, (63), 2 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-20 06:07:37,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:07:37,949 INFO L93 Difference]: Finished difference Result 187 states and 229 transitions. [2021-11-20 06:07:37,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 06:07:37,955 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 8 states have internal predecessors, (63), 2 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 93 [2021-11-20 06:07:37,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:07:37,957 INFO L225 Difference]: With dead ends: 187 [2021-11-20 06:07:37,957 INFO L226 Difference]: Without dead ends: 150 [2021-11-20 06:07:37,958 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:07:37,959 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 7 mSDsluCounter, 754 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 881 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:07:37,959 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 881 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:07:37,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-11-20 06:07:37,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2021-11-20 06:07:37,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 105 states have (on average 1.180952380952381) internal successors, (124), 107 states have internal predecessors, (124), 27 states have call successors, (27), 14 states have call predecessors, (27), 17 states have return successors, (33), 28 states have call predecessors, (33), 26 states have call successors, (33) [2021-11-20 06:07:37,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 184 transitions. [2021-11-20 06:07:37,982 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 184 transitions. Word has length 93 [2021-11-20 06:07:37,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:07:37,982 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 184 transitions. [2021-11-20 06:07:37,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 8 states have internal predecessors, (63), 2 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-20 06:07:37,983 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 184 transitions. [2021-11-20 06:07:37,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-20 06:07:37,985 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:07:37,985 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:07:38,034 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-20 06:07:38,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-20 06:07:38,203 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:07:38,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:07:38,203 INFO L85 PathProgramCache]: Analyzing trace with hash 790840008, now seen corresponding path program 3 times [2021-11-20 06:07:38,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:07:38,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648856970] [2021-11-20 06:07:38,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:07:38,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:07:38,292 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:07:38,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [235298564] [2021-11-20 06:07:38,293 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 06:07:38,293 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:07:38,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:07:38,294 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:07:38,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-20 06:07:39,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-20 06:07:39,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:07:39,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 2101 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-20 06:07:39,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:07:39,367 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-20 06:07:39,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:07:39,759 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-20 06:07:39,760 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:07:39,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648856970] [2021-11-20 06:07:39,760 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:07:39,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235298564] [2021-11-20 06:07:39,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235298564] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:07:39,761 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:07:39,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-11-20 06:07:39,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826393082] [2021-11-20 06:07:39,765 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:07:39,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 06:07:39,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:07:39,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 06:07:39,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:07:39,770 INFO L87 Difference]: Start difference. First operand 150 states and 184 transitions. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-20 06:07:39,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:07:39,905 INFO L93 Difference]: Finished difference Result 223 states and 271 transitions. [2021-11-20 06:07:39,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 06:07:39,906 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 96 [2021-11-20 06:07:39,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:07:39,908 INFO L225 Difference]: With dead ends: 223 [2021-11-20 06:07:39,908 INFO L226 Difference]: Without dead ends: 162 [2021-11-20 06:07:39,909 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:07:39,910 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 28 mSDsluCounter, 497 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 624 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:07:39,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 624 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:07:39,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-11-20 06:07:39,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 158. [2021-11-20 06:07:39,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 113 states have (on average 1.1858407079646018) internal successors, (134), 115 states have internal predecessors, (134), 27 states have call successors, (27), 14 states have call predecessors, (27), 17 states have return successors, (33), 28 states have call predecessors, (33), 26 states have call successors, (33) [2021-11-20 06:07:39,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 194 transitions. [2021-11-20 06:07:39,927 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 194 transitions. Word has length 96 [2021-11-20 06:07:39,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:07:39,928 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 194 transitions. [2021-11-20 06:07:39,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-20 06:07:39,928 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 194 transitions. [2021-11-20 06:07:39,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-20 06:07:39,931 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:07:39,931 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:07:39,981 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-20 06:07:40,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-20 06:07:40,155 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:07:40,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:07:40,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1343320806, now seen corresponding path program 1 times [2021-11-20 06:07:40,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:07:40,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970996860] [2021-11-20 06:07:40,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:07:40,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:07:40,235 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:07:40,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1208032359] [2021-11-20 06:07:40,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:07:40,236 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:07:40,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:07:40,238 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:07:40,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-20 06:07:40,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:40,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 2288 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-20 06:07:40,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:07:41,219 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-20 06:07:41,219 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:07:41,219 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:07:41,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970996860] [2021-11-20 06:07:41,220 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:07:41,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208032359] [2021-11-20 06:07:41,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208032359] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:07:41,220 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:07:41,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-11-20 06:07:41,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410352819] [2021-11-20 06:07:41,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:07:41,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-20 06:07:41,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:07:41,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-20 06:07:41,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2021-11-20 06:07:41,222 INFO L87 Difference]: Start difference. First operand 158 states and 194 transitions. Second operand has 15 states, 15 states have (on average 4.666666666666667) internal successors, (70), 11 states have internal predecessors, (70), 3 states have call successors, (15), 2 states have call predecessors, (15), 7 states have return successors, (15), 6 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-20 06:07:41,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:07:41,506 INFO L93 Difference]: Finished difference Result 227 states and 278 transitions. [2021-11-20 06:07:41,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-20 06:07:41,509 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.666666666666667) internal successors, (70), 11 states have internal predecessors, (70), 3 states have call successors, (15), 2 states have call predecessors, (15), 7 states have return successors, (15), 6 states have call predecessors, (15), 3 states have call successors, (15) Word has length 117 [2021-11-20 06:07:41,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:07:41,510 INFO L225 Difference]: With dead ends: 227 [2021-11-20 06:07:41,510 INFO L226 Difference]: Without dead ends: 157 [2021-11-20 06:07:41,511 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-11-20 06:07:41,512 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 15 mSDsluCounter, 1644 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 1775 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:07:41,512 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 1775 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 06:07:41,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-11-20 06:07:41,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 154. [2021-11-20 06:07:41,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 110 states have (on average 1.190909090909091) internal successors, (131), 113 states have internal predecessors, (131), 26 states have call successors, (26), 14 states have call predecessors, (26), 17 states have return successors, (30), 26 states have call predecessors, (30), 25 states have call successors, (30) [2021-11-20 06:07:41,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 187 transitions. [2021-11-20 06:07:41,533 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 187 transitions. Word has length 117 [2021-11-20 06:07:41,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:07:41,534 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 187 transitions. [2021-11-20 06:07:41,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.666666666666667) internal successors, (70), 11 states have internal predecessors, (70), 3 states have call successors, (15), 2 states have call predecessors, (15), 7 states have return successors, (15), 6 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-20 06:07:41,534 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 187 transitions. [2021-11-20 06:07:41,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-20 06:07:41,538 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:07:41,538 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:07:41,585 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-20 06:07:41,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-20 06:07:41,751 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:07:41,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:07:41,751 INFO L85 PathProgramCache]: Analyzing trace with hash 632703886, now seen corresponding path program 1 times [2021-11-20 06:07:41,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:07:41,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655017410] [2021-11-20 06:07:41,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:07:41,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:07:41,812 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:07:41,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1094719730] [2021-11-20 06:07:41,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:07:41,813 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:07:41,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:07:41,815 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:07:41,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-20 06:07:42,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:42,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 2272 conjuncts, 74 conjunts are in the unsatisfiable core [2021-11-20 06:07:42,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:07:42,837 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 14 treesize of output 10 [2021-11-20 06:07:42,884 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-20 06:07:42,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-11-20 06:07:42,944 INFO L354 Elim1Store]: treesize reduction 60, result has 22.1 percent of original size [2021-11-20 06:07:42,944 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 31 treesize of output 33 [2021-11-20 06:07:43,023 INFO L354 Elim1Store]: treesize reduction 104, result has 20.0 percent of original size [2021-11-20 06:07:43,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 44 [2021-11-20 06:07:43,635 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-20 06:07:43,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:07:44,188 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 93 treesize of output 89 [2021-11-20 06:07:44,908 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 34 treesize of output 32 [2021-11-20 06:07:44,913 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 382 treesize of output 378 [2021-11-20 06:07:45,018 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 34 treesize of output 32 [2021-11-20 06:07:45,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:07:45,026 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 184 treesize of output 180 [2021-11-20 06:07:45,068 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 34 treesize of output 32 [2021-11-20 06:07:45,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:07:45,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:07:45,077 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 84 treesize of output 80 [2021-11-20 06:07:45,104 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 32 treesize of output 30 [2021-11-20 06:07:45,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:07:45,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:07:45,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:07:45,112 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 26 treesize of output 24 [2021-11-20 06:07:46,017 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-20 06:07:46,017 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:07:46,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655017410] [2021-11-20 06:07:46,017 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:07:46,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094719730] [2021-11-20 06:07:46,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094719730] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:07:46,018 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:07:46,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14] total 31 [2021-11-20 06:07:46,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366315585] [2021-11-20 06:07:46,018 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:07:46,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-20 06:07:46,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:07:46,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-20 06:07:46,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=824, Unknown=0, NotChecked=0, Total=930 [2021-11-20 06:07:46,021 INFO L87 Difference]: Start difference. First operand 154 states and 187 transitions. Second operand has 31 states, 31 states have (on average 2.870967741935484) internal successors, (89), 28 states have internal predecessors, (89), 7 states have call successors, (25), 3 states have call predecessors, (25), 6 states have return successors, (24), 9 states have call predecessors, (24), 6 states have call successors, (24) [2021-11-20 06:07:47,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:07:47,216 INFO L93 Difference]: Finished difference Result 164 states and 196 transitions. [2021-11-20 06:07:47,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-20 06:07:47,217 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.870967741935484) internal successors, (89), 28 states have internal predecessors, (89), 7 states have call successors, (25), 3 states have call predecessors, (25), 6 states have return successors, (24), 9 states have call predecessors, (24), 6 states have call successors, (24) Word has length 111 [2021-11-20 06:07:47,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:07:47,219 INFO L225 Difference]: With dead ends: 164 [2021-11-20 06:07:47,219 INFO L226 Difference]: Without dead ends: 157 [2021-11-20 06:07:47,220 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=193, Invalid=1447, Unknown=0, NotChecked=0, Total=1640 [2021-11-20 06:07:47,221 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 57 mSDsluCounter, 1898 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 2013 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 06:07:47,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 2013 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 491 Invalid, 0 Unknown, 74 Unchecked, 0.7s Time] [2021-11-20 06:07:47,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-11-20 06:07:47,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 147. [2021-11-20 06:07:47,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 106 states have (on average 1.179245283018868) internal successors, (125), 108 states have internal predecessors, (125), 23 states have call successors, (23), 15 states have call predecessors, (23), 17 states have return successors, (26), 23 states have call predecessors, (26), 22 states have call successors, (26) [2021-11-20 06:07:47,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 174 transitions. [2021-11-20 06:07:47,237 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 174 transitions. Word has length 111 [2021-11-20 06:07:47,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:07:47,238 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 174 transitions. [2021-11-20 06:07:47,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.870967741935484) internal successors, (89), 28 states have internal predecessors, (89), 7 states have call successors, (25), 3 states have call predecessors, (25), 6 states have return successors, (24), 9 states have call predecessors, (24), 6 states have call successors, (24) [2021-11-20 06:07:47,238 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 174 transitions. [2021-11-20 06:07:47,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-20 06:07:47,240 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:07:47,241 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:07:47,290 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-20 06:07:47,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-20 06:07:47,455 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:07:47,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:07:47,456 INFO L85 PathProgramCache]: Analyzing trace with hash -564772413, now seen corresponding path program 1 times [2021-11-20 06:07:47,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:07:47,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328494401] [2021-11-20 06:07:47,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:07:47,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:07:47,537 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:07:47,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2120646408] [2021-11-20 06:07:47,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:07:47,538 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:07:47,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:07:47,543 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:07:47,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-20 06:07:48,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:48,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 2279 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-20 06:07:48,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:07:48,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 06:07:48,754 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-20 06:07:48,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-11-20 06:07:48,810 INFO L354 Elim1Store]: treesize reduction 56, result has 23.3 percent of original size [2021-11-20 06:07:48,811 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 30 treesize of output 32 [2021-11-20 06:07:48,878 INFO L354 Elim1Store]: treesize reduction 56, result has 23.3 percent of original size [2021-11-20 06:07:48,879 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 30 treesize of output 32 [2021-11-20 06:07:49,345 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-20 06:07:49,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:07:50,058 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 111 treesize of output 105 [2021-11-20 06:07:50,500 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 22 treesize of output 20 [2021-11-20 06:07:50,505 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 82 treesize of output 78 [2021-11-20 06:07:50,523 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 18 [2021-11-20 06:07:50,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:07:50,528 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 26 treesize of output 24 [2021-11-20 06:07:51,036 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-20 06:07:51,037 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:07:51,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328494401] [2021-11-20 06:07:51,037 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:07:51,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120646408] [2021-11-20 06:07:51,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120646408] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:07:51,038 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:07:51,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-11-20 06:07:51,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347124119] [2021-11-20 06:07:51,038 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:07:51,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-20 06:07:51,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:07:51,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-20 06:07:51,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2021-11-20 06:07:51,043 INFO L87 Difference]: Start difference. First operand 147 states and 174 transitions. Second operand has 27 states, 27 states have (on average 3.3703703703703702) internal successors, (91), 24 states have internal predecessors, (91), 7 states have call successors, (25), 3 states have call predecessors, (25), 6 states have return successors, (24), 9 states have call predecessors, (24), 6 states have call successors, (24) [2021-11-20 06:07:52,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:07:52,163 INFO L93 Difference]: Finished difference Result 160 states and 187 transitions. [2021-11-20 06:07:52,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-20 06:07:52,163 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.3703703703703702) internal successors, (91), 24 states have internal predecessors, (91), 7 states have call successors, (25), 3 states have call predecessors, (25), 6 states have return successors, (24), 9 states have call predecessors, (24), 6 states have call successors, (24) Word has length 114 [2021-11-20 06:07:52,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:07:52,165 INFO L225 Difference]: With dead ends: 160 [2021-11-20 06:07:52,165 INFO L226 Difference]: Without dead ends: 153 [2021-11-20 06:07:52,165 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 199 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=146, Invalid=976, Unknown=0, NotChecked=0, Total=1122 [2021-11-20 06:07:52,166 INFO L933 BasicCegarLoop]: 122 mSDtfsCounter, 77 mSDsluCounter, 1664 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 1786 SdHoareTripleChecker+Invalid, 652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-20 06:07:52,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 1786 Invalid, 652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 511 Invalid, 0 Unknown, 101 Unchecked, 0.8s Time] [2021-11-20 06:07:52,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-11-20 06:07:52,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 150. [2021-11-20 06:07:52,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 109 states have (on average 1.1743119266055047) internal successors, (128), 111 states have internal predecessors, (128), 23 states have call successors, (23), 15 states have call predecessors, (23), 17 states have return successors, (26), 23 states have call predecessors, (26), 22 states have call successors, (26) [2021-11-20 06:07:52,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 177 transitions. [2021-11-20 06:07:52,180 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 177 transitions. Word has length 114 [2021-11-20 06:07:52,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:07:52,181 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 177 transitions. [2021-11-20 06:07:52,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.3703703703703702) internal successors, (91), 24 states have internal predecessors, (91), 7 states have call successors, (25), 3 states have call predecessors, (25), 6 states have return successors, (24), 9 states have call predecessors, (24), 6 states have call successors, (24) [2021-11-20 06:07:52,181 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 177 transitions. [2021-11-20 06:07:52,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-20 06:07:52,183 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:07:52,184 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:07:52,230 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-20 06:07:52,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:07:52,407 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:07:52,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:07:52,407 INFO L85 PathProgramCache]: Analyzing trace with hash -582835346, now seen corresponding path program 2 times [2021-11-20 06:07:52,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:07:52,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710473918] [2021-11-20 06:07:52,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:07:52,408 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:07:52,481 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:07:52,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [624952481] [2021-11-20 06:07:52,482 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:07:52,482 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:07:52,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:07:52,500 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:07:52,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-20 06:07:52,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:07:52,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:07:52,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 2286 conjuncts, 74 conjunts are in the unsatisfiable core [2021-11-20 06:07:52,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:07:53,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 06:07:53,666 INFO L354 Elim1Store]: treesize reduction 23, result has 23.3 percent of original size [2021-11-20 06:07:53,666 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 22 treesize of output 21 [2021-11-20 06:07:53,736 INFO L354 Elim1Store]: treesize reduction 56, result has 23.3 percent of original size [2021-11-20 06:07:53,737 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 30 treesize of output 32 [2021-11-20 06:07:53,810 INFO L354 Elim1Store]: treesize reduction 104, result has 20.0 percent of original size [2021-11-20 06:07:53,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 44 [2021-11-20 06:07:54,780 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 7 proven. 28 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-20 06:07:54,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:07:55,751 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 111 treesize of output 105 [2021-11-20 06:07:56,652 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 34 treesize of output 32 [2021-11-20 06:07:56,655 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 380 treesize of output 376 [2021-11-20 06:07:56,707 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 34 treesize of output 32 [2021-11-20 06:07:56,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:07:56,715 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 184 treesize of output 180 [2021-11-20 06:07:56,737 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 34 treesize of output 32 [2021-11-20 06:07:56,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:07:56,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:07:56,746 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 84 treesize of output 80 [2021-11-20 06:07:56,765 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 32 treesize of output 30 [2021-11-20 06:07:56,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:07:56,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:07:56,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:07:56,772 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 26 treesize of output 24 [2021-11-20 06:07:57,686 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-20 06:07:57,686 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:07:57,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710473918] [2021-11-20 06:07:57,687 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:07:57,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624952481] [2021-11-20 06:07:57,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624952481] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:07:57,687 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:07:57,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 16] total 37 [2021-11-20 06:07:57,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644939932] [2021-11-20 06:07:57,688 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:07:57,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-20 06:07:57,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:07:57,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-20 06:07:57,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1206, Unknown=0, NotChecked=0, Total=1332 [2021-11-20 06:07:57,690 INFO L87 Difference]: Start difference. First operand 150 states and 177 transitions. Second operand has 37 states, 36 states have (on average 2.888888888888889) internal successors, (104), 33 states have internal predecessors, (104), 8 states have call successors, (25), 3 states have call predecessors, (25), 8 states have return successors, (24), 10 states have call predecessors, (24), 7 states have call successors, (24) [2021-11-20 06:07:59,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:07:59,579 INFO L93 Difference]: Finished difference Result 165 states and 192 transitions. [2021-11-20 06:07:59,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-20 06:07:59,591 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.888888888888889) internal successors, (104), 33 states have internal predecessors, (104), 8 states have call successors, (25), 3 states have call predecessors, (25), 8 states have return successors, (24), 10 states have call predecessors, (24), 7 states have call successors, (24) Word has length 117 [2021-11-20 06:07:59,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:07:59,593 INFO L225 Difference]: With dead ends: 165 [2021-11-20 06:07:59,594 INFO L226 Difference]: Without dead ends: 158 [2021-11-20 06:07:59,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=195, Invalid=1875, Unknown=0, NotChecked=0, Total=2070 [2021-11-20 06:07:59,596 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 82 mSDsluCounter, 1634 mSDsCounter, 0 mSdLazyCounter, 656 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 1750 SdHoareTripleChecker+Invalid, 900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 203 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:07:59,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 1750 Invalid, 900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 656 Invalid, 0 Unknown, 203 Unchecked, 1.2s Time] [2021-11-20 06:07:59,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-11-20 06:07:59,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 153. [2021-11-20 06:07:59,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 112 states have (on average 1.1696428571428572) internal successors, (131), 114 states have internal predecessors, (131), 23 states have call successors, (23), 15 states have call predecessors, (23), 17 states have return successors, (26), 23 states have call predecessors, (26), 22 states have call successors, (26) [2021-11-20 06:07:59,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 180 transitions. [2021-11-20 06:07:59,613 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 180 transitions. Word has length 117 [2021-11-20 06:07:59,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:07:59,614 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 180 transitions. [2021-11-20 06:07:59,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.888888888888889) internal successors, (104), 33 states have internal predecessors, (104), 8 states have call successors, (25), 3 states have call predecessors, (25), 8 states have return successors, (24), 10 states have call predecessors, (24), 7 states have call successors, (24) [2021-11-20 06:07:59,615 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 180 transitions. [2021-11-20 06:07:59,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-20 06:07:59,617 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:07:59,617 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:07:59,653 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-11-20 06:07:59,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:07:59,831 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:07:59,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:07:59,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1824760349, now seen corresponding path program 3 times [2021-11-20 06:07:59,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:07:59,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854067413] [2021-11-20 06:07:59,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:07:59,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:07:59,936 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:07:59,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1150890264] [2021-11-20 06:07:59,936 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 06:07:59,937 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:07:59,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:07:59,943 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:07:59,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-20 06:08:01,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-20 06:08:01,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:08:01,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 2257 conjuncts, 67 conjunts are in the unsatisfiable core [2021-11-20 06:08:01,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:08:01,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 06:08:01,755 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-20 06:08:01,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-11-20 06:08:01,800 INFO L354 Elim1Store]: treesize reduction 60, result has 22.1 percent of original size [2021-11-20 06:08:01,801 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 31 treesize of output 33 [2021-11-20 06:08:01,881 INFO L354 Elim1Store]: treesize reduction 104, result has 20.0 percent of original size [2021-11-20 06:08:01,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 44 [2021-11-20 06:08:02,015 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-11-20 06:08:02,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:08:02,248 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:08:02,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854067413] [2021-11-20 06:08:02,249 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:08:02,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150890264] [2021-11-20 06:08:02,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150890264] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:08:02,249 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:08:02,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-11-20 06:08:02,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111489752] [2021-11-20 06:08:02,249 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 06:08:02,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-20 06:08:02,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:08:02,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-20 06:08:02,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-11-20 06:08:02,251 INFO L87 Difference]: Start difference. First operand 153 states and 180 transitions. Second operand has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 4 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-20 06:08:02,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:08:02,677 INFO L93 Difference]: Finished difference Result 185 states and 213 transitions. [2021-11-20 06:08:02,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 06:08:02,678 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 4 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 120 [2021-11-20 06:08:02,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:08:02,680 INFO L225 Difference]: With dead ends: 185 [2021-11-20 06:08:02,680 INFO L226 Difference]: Without dead ends: 155 [2021-11-20 06:08:02,681 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-11-20 06:08:02,682 INFO L933 BasicCegarLoop]: 121 mSDtfsCounter, 26 mSDsluCounter, 963 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 1084 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:08:02,682 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 1084 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 06:08:02,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-11-20 06:08:02,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 154. [2021-11-20 06:08:02,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 113 states have (on average 1.168141592920354) internal successors, (132), 115 states have internal predecessors, (132), 23 states have call successors, (23), 15 states have call predecessors, (23), 17 states have return successors, (26), 23 states have call predecessors, (26), 22 states have call successors, (26) [2021-11-20 06:08:02,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 181 transitions. [2021-11-20 06:08:02,699 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 181 transitions. Word has length 120 [2021-11-20 06:08:02,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:08:02,700 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 181 transitions. [2021-11-20 06:08:02,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 4 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-20 06:08:02,700 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 181 transitions. [2021-11-20 06:08:02,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-20 06:08:02,702 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:08:02,703 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:08:02,751 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-11-20 06:08:02,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:08:02,919 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:08:02,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:08:02,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1076191317, now seen corresponding path program 4 times [2021-11-20 06:08:02,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:08:02,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318745190] [2021-11-20 06:08:02,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:08:02,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:08:03,004 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:08:03,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1518322] [2021-11-20 06:08:03,005 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 06:08:03,005 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:08:03,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:08:03,006 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:08:03,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-20 06:08:03,912 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 06:08:03,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:08:03,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 2300 conjuncts, 62 conjunts are in the unsatisfiable core [2021-11-20 06:08:03,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:08:04,300 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 [2021-11-20 06:08:04,343 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-20 06:08:04,343 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 23 treesize of output 22 [2021-11-20 06:08:04,870 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 9 proven. 31 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-20 06:08:04,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:08:05,920 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 63 treesize of output 57 [2021-11-20 06:08:06,112 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 14 [2021-11-20 06:08:06,115 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 32 treesize of output 28 [2021-11-20 06:08:06,706 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 10 proven. 29 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-20 06:08:06,706 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:08:06,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318745190] [2021-11-20 06:08:06,707 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:08:06,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518322] [2021-11-20 06:08:06,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518322] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:08:06,707 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:08:06,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 35 [2021-11-20 06:08:06,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322790438] [2021-11-20 06:08:06,708 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:08:06,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-20 06:08:06,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:08:06,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-20 06:08:06,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1077, Unknown=0, NotChecked=0, Total=1190 [2021-11-20 06:08:06,710 INFO L87 Difference]: Start difference. First operand 154 states and 181 transitions. Second operand has 35 states, 35 states have (on average 3.057142857142857) internal successors, (107), 32 states have internal predecessors, (107), 7 states have call successors, (25), 3 states have call predecessors, (25), 6 states have return successors, (24), 9 states have call predecessors, (24), 6 states have call successors, (24) [2021-11-20 06:08:08,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:08:08,353 INFO L93 Difference]: Finished difference Result 173 states and 201 transitions. [2021-11-20 06:08:08,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-20 06:08:08,354 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.057142857142857) internal successors, (107), 32 states have internal predecessors, (107), 7 states have call successors, (25), 3 states have call predecessors, (25), 6 states have return successors, (24), 9 states have call predecessors, (24), 6 states have call successors, (24) Word has length 121 [2021-11-20 06:08:08,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:08:08,355 INFO L225 Difference]: With dead ends: 173 [2021-11-20 06:08:08,356 INFO L226 Difference]: Without dead ends: 166 [2021-11-20 06:08:08,357 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 208 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=192, Invalid=1788, Unknown=0, NotChecked=0, Total=1980 [2021-11-20 06:08:08,358 INFO L933 BasicCegarLoop]: 129 mSDtfsCounter, 75 mSDsluCounter, 2393 mSDsCounter, 0 mSdLazyCounter, 718 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 2522 SdHoareTripleChecker+Invalid, 1040 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 286 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:08:08,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 2522 Invalid, 1040 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 718 Invalid, 0 Unknown, 286 Unchecked, 1.0s Time] [2021-11-20 06:08:08,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-11-20 06:08:08,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 158. [2021-11-20 06:08:08,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 117 states have (on average 1.170940170940171) internal successors, (137), 119 states have internal predecessors, (137), 23 states have call successors, (23), 15 states have call predecessors, (23), 17 states have return successors, (26), 23 states have call predecessors, (26), 22 states have call successors, (26) [2021-11-20 06:08:08,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 186 transitions. [2021-11-20 06:08:08,377 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 186 transitions. Word has length 121 [2021-11-20 06:08:08,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:08:08,377 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 186 transitions. [2021-11-20 06:08:08,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.057142857142857) internal successors, (107), 32 states have internal predecessors, (107), 7 states have call successors, (25), 3 states have call predecessors, (25), 6 states have return successors, (24), 9 states have call predecessors, (24), 6 states have call successors, (24) [2021-11-20 06:08:08,378 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 186 transitions. [2021-11-20 06:08:08,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-20 06:08:08,380 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:08:08,381 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:08:08,433 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-20 06:08:08,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-20 06:08:08,595 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:08:08,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:08:08,596 INFO L85 PathProgramCache]: Analyzing trace with hash 49882012, now seen corresponding path program 5 times [2021-11-20 06:08:08,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:08:08,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918056838] [2021-11-20 06:08:08,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:08:08,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:08:08,652 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:08:08,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [436550123] [2021-11-20 06:08:08,652 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 06:08:08,653 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:08:08,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:08:08,654 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:08:08,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-20 06:08:12,553 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-11-20 06:08:12,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:08:12,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 2307 conjuncts, 71 conjunts are in the unsatisfiable core [2021-11-20 06:08:12,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:08:12,792 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 14 treesize of output 10 [2021-11-20 06:08:12,813 INFO L354 Elim1Store]: treesize reduction 32, result has 23.8 percent of original size [2021-11-20 06:08:12,813 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 25 treesize of output 24 [2021-11-20 06:08:12,854 INFO L354 Elim1Store]: treesize reduction 56, result has 23.3 percent of original size [2021-11-20 06:08:12,855 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 30 treesize of output 32 [2021-11-20 06:08:12,920 INFO L354 Elim1Store]: treesize reduction 110, result has 19.1 percent of original size [2021-11-20 06:08:12,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 45 [2021-11-20 06:08:13,058 INFO L354 Elim1Store]: treesize reduction 164, result has 17.6 percent of original size [2021-11-20 06:08:13,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 48 treesize of output 56 [2021-11-20 06:08:14,800 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 43 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-20 06:08:14,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:08:16,466 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 137 treesize of output 131 [2021-11-20 06:08:18,296 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 38 [2021-11-20 06:08:18,301 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 768 treesize of output 764 [2021-11-20 06:08:18,389 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 38 treesize of output 36 [2021-11-20 06:08:18,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:08:18,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:08:18,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:08:18,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:08:18,397 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 26 treesize of output 24 [2021-11-20 06:08:18,413 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 38 [2021-11-20 06:08:18,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:08:18,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:08:18,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:08:18,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:08:18,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:08:18,427 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 38 [2021-11-20 06:08:18,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:08:18,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:08:18,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:08:18,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:08:18,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:08:18,440 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 38 [2021-11-20 06:08:18,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:08:18,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:08:18,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:08:18,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:08:18,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:08:19,422 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 16 proven. 37 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-20 06:08:19,422 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:08:19,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918056838] [2021-11-20 06:08:19,422 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:08:19,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436550123] [2021-11-20 06:08:19,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436550123] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:08:19,423 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:08:19,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 38 [2021-11-20 06:08:19,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862211580] [2021-11-20 06:08:19,423 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:08:19,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-20 06:08:19,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:08:19,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-20 06:08:19,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1272, Unknown=0, NotChecked=0, Total=1406 [2021-11-20 06:08:19,426 INFO L87 Difference]: Start difference. First operand 158 states and 186 transitions. Second operand has 38 states, 38 states have (on average 2.789473684210526) internal successors, (106), 35 states have internal predecessors, (106), 6 states have call successors, (19), 3 states have call predecessors, (19), 6 states have return successors, (18), 8 states have call predecessors, (18), 5 states have call successors, (18) [2021-11-20 06:08:22,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:08:22,711 INFO L93 Difference]: Finished difference Result 184 states and 215 transitions. [2021-11-20 06:08:22,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-20 06:08:22,712 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.789473684210526) internal successors, (106), 35 states have internal predecessors, (106), 6 states have call successors, (19), 3 states have call predecessors, (19), 6 states have return successors, (18), 8 states have call predecessors, (18), 5 states have call successors, (18) Word has length 124 [2021-11-20 06:08:22,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:08:22,714 INFO L225 Difference]: With dead ends: 184 [2021-11-20 06:08:22,714 INFO L226 Difference]: Without dead ends: 177 [2021-11-20 06:08:22,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=213, Invalid=2043, Unknown=0, NotChecked=0, Total=2256 [2021-11-20 06:08:22,716 INFO L933 BasicCegarLoop]: 135 mSDtfsCounter, 58 mSDsluCounter, 2693 mSDsCounter, 0 mSdLazyCounter, 925 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 2828 SdHoareTripleChecker+Invalid, 1178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 925 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 221 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:08:22,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 2828 Invalid, 1178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 925 Invalid, 0 Unknown, 221 Unchecked, 2.1s Time] [2021-11-20 06:08:22,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-11-20 06:08:22,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 164. [2021-11-20 06:08:22,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 123 states have (on average 1.1869918699186992) internal successors, (146), 125 states have internal predecessors, (146), 23 states have call successors, (23), 15 states have call predecessors, (23), 17 states have return successors, (26), 23 states have call predecessors, (26), 22 states have call successors, (26) [2021-11-20 06:08:22,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 195 transitions. [2021-11-20 06:08:22,738 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 195 transitions. Word has length 124 [2021-11-20 06:08:22,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:08:22,739 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 195 transitions. [2021-11-20 06:08:22,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.789473684210526) internal successors, (106), 35 states have internal predecessors, (106), 6 states have call successors, (19), 3 states have call predecessors, (19), 6 states have return successors, (18), 8 states have call predecessors, (18), 5 states have call successors, (18) [2021-11-20 06:08:22,739 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 195 transitions. [2021-11-20 06:08:22,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-20 06:08:22,741 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:08:22,742 INFO L514 BasicCegarLoop]: trace histogram [7, 5, 5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:08:22,760 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-20 06:08:22,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-20 06:08:22,956 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:08:22,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:08:22,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1141556981, now seen corresponding path program 6 times [2021-11-20 06:08:22,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:08:22,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596439514] [2021-11-20 06:08:22,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:08:22,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:08:23,014 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:08:23,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1227230393] [2021-11-20 06:08:23,015 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 06:08:23,015 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:08:23,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:08:23,017 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:08:23,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-20 06:08:36,239 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-11-20 06:08:36,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:08:36,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 2314 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-20 06:08:36,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:08:36,580 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-20 06:08:36,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:08:37,157 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-11-20 06:08:37,157 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:08:37,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596439514] [2021-11-20 06:08:37,158 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:08:37,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227230393] [2021-11-20 06:08:37,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227230393] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:08:37,158 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:08:37,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-11-20 06:08:37,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274444732] [2021-11-20 06:08:37,159 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:08:37,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-20 06:08:37,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:08:37,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-20 06:08:37,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-11-20 06:08:37,161 INFO L87 Difference]: Start difference. First operand 164 states and 195 transitions. Second operand has 16 states, 16 states have (on average 4.375) internal successors, (70), 16 states have internal predecessors, (70), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-20 06:08:38,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:08:38,334 INFO L93 Difference]: Finished difference Result 207 states and 246 transitions. [2021-11-20 06:08:38,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-20 06:08:38,335 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.375) internal successors, (70), 16 states have internal predecessors, (70), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 127 [2021-11-20 06:08:38,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:08:38,338 INFO L225 Difference]: With dead ends: 207 [2021-11-20 06:08:38,338 INFO L226 Difference]: Without dead ends: 171 [2021-11-20 06:08:38,339 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2021-11-20 06:08:38,340 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 29 mSDsluCounter, 1008 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 1135 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:08:38,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 1135 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:08:38,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-11-20 06:08:38,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2021-11-20 06:08:38,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 130 states have (on average 1.176923076923077) internal successors, (153), 132 states have internal predecessors, (153), 23 states have call successors, (23), 15 states have call predecessors, (23), 17 states have return successors, (26), 23 states have call predecessors, (26), 22 states have call successors, (26) [2021-11-20 06:08:38,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 202 transitions. [2021-11-20 06:08:38,361 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 202 transitions. Word has length 127 [2021-11-20 06:08:38,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:08:38,361 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 202 transitions. [2021-11-20 06:08:38,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.375) internal successors, (70), 16 states have internal predecessors, (70), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-20 06:08:38,362 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 202 transitions. [2021-11-20 06:08:38,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-20 06:08:38,363 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:08:38,364 INFO L514 BasicCegarLoop]: trace histogram [12, 7, 5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:08:38,394 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-20 06:08:38,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-20 06:08:38,579 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:08:38,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:08:38,579 INFO L85 PathProgramCache]: Analyzing trace with hash 1917844227, now seen corresponding path program 7 times [2021-11-20 06:08:38,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:08:38,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819860049] [2021-11-20 06:08:38,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:08:38,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:08:38,634 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:08:38,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1823983086] [2021-11-20 06:08:38,635 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 06:08:38,635 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:08:38,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:08:38,643 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:08:38,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-20 06:08:39,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:39,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 2363 conjuncts, 87 conjunts are in the unsatisfiable core [2021-11-20 06:08:39,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:08:40,142 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 14 treesize of output 10 [2021-11-20 06:08:40,223 INFO L354 Elim1Store]: treesize reduction 32, result has 23.8 percent of original size [2021-11-20 06:08:40,224 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 25 treesize of output 24 [2021-11-20 06:08:40,292 INFO L354 Elim1Store]: treesize reduction 56, result has 23.3 percent of original size [2021-11-20 06:08:40,292 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 30 treesize of output 32 [2021-11-20 06:08:40,424 INFO L354 Elim1Store]: treesize reduction 104, result has 20.0 percent of original size [2021-11-20 06:08:40,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 44 [2021-11-20 06:08:40,614 INFO L354 Elim1Store]: treesize reduction 172, result has 16.9 percent of original size [2021-11-20 06:08:40,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 49 treesize of output 57 [2021-11-20 06:08:40,801 INFO L354 Elim1Store]: treesize reduction 236, result has 15.7 percent of original size [2021-11-20 06:08:40,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 57 treesize of output 68 [2021-11-20 06:08:41,010 INFO L354 Elim1Store]: treesize reduction 320, result has 14.2 percent of original size [2021-11-20 06:08:41,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 74 treesize of output 88 [2021-11-20 06:08:41,356 INFO L354 Elim1Store]: treesize reduction 416, result has 13.0 percent of original size [2021-11-20 06:08:41,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 28 case distinctions, treesize of input 88 treesize of output 105 [2021-11-20 06:08:41,755 INFO L354 Elim1Store]: treesize reduction 524, result has 11.9 percent of original size [2021-11-20 06:08:41,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 102 treesize of output 122 [2021-11-20 06:08:42,239 INFO L354 Elim1Store]: treesize reduction 644, result has 11.0 percent of original size [2021-11-20 06:08:42,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 45 case distinctions, treesize of input 116 treesize of output 139 [2021-11-20 06:08:43,183 INFO L354 Elim1Store]: treesize reduction 776, result has 10.3 percent of original size [2021-11-20 06:08:43,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 55 case distinctions, treesize of input 130 treesize of output 156 [2021-11-20 06:08:47,393 INFO L354 Elim1Store]: treesize reduction 920, result has 9.6 percent of original size [2021-11-20 06:08:47,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 66 case distinctions, treesize of input 139 treesize of output 168 [2021-11-20 06:09:09,366 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 28 proven. 105 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-20 06:09:09,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:09:16,823 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 347 treesize of output 341 [2021-11-20 06:14:57,289 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 486 treesize of output 474 [2021-11-20 06:14:57,367 INFO L354 Elim1Store]: treesize reduction 170, result has 0.6 percent of original size [2021-11-20 06:14:57,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 570954 treesize of output 570932 [2021-11-20 06:14:59,401 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:14:59,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819860049] [2021-11-20 06:14:59,401 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:14:59,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823983086] [2021-11-20 06:14:59,402 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-20 06:14:59,402 INFO L186 FreeRefinementEngine]: Found 0 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:14:59,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-11-20 06:14:59,402 ERROR L172 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2021-11-20 06:14:59,403 INFO L628 BasicCegarLoop]: Counterexample might be feasible [2021-11-20 06:14:59,412 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-20 06:14:59,453 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-20 06:14:59,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:14:59,631 INFO L732 BasicCegarLoop]: Path program histogram: [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:14:59,634 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-20 06:14:59,645 WARN L418 cessorBacktranslator]: Generated EnsuresSpecification free ensures #res.base == #ptr.base && #res.offset == #ptr.offset; is not ensure(true) [2021-11-20 06:14:59,687 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 06:14:59 BoogieIcfgContainer [2021-11-20 06:14:59,687 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-20 06:14:59,688 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-20 06:14:59,688 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-20 06:14:59,688 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-20 06:14:59,689 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:06:56" (3/4) ... [2021-11-20 06:14:59,691 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-20 06:14:59,692 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-20 06:14:59,692 INFO L158 Benchmark]: Toolchain (without parser) took 488735.98ms. Allocated memory was 96.5MB in the beginning and 260.0MB in the end (delta: 163.6MB). Free memory was 55.2MB in the beginning and 142.7MB in the end (delta: -87.4MB). Peak memory consumption was 74.2MB. Max. memory is 16.1GB. [2021-11-20 06:14:59,693 INFO L158 Benchmark]: CDTParser took 0.36ms. Allocated memory is still 96.5MB. Free memory is still 51.6MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 06:14:59,693 INFO L158 Benchmark]: CACSL2BoogieTranslator took 3168.67ms. Allocated memory was 96.5MB in the beginning and 127.9MB in the end (delta: 31.5MB). Free memory was 55.0MB in the beginning and 77.8MB in the end (delta: -22.7MB). Peak memory consumption was 47.6MB. Max. memory is 16.1GB. [2021-11-20 06:14:59,693 INFO L158 Benchmark]: Boogie Procedure Inliner took 290.60ms. Allocated memory is still 127.9MB. Free memory was 77.8MB in the beginning and 69.4MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-20 06:14:59,694 INFO L158 Benchmark]: Boogie Preprocessor took 89.10ms. Allocated memory is still 127.9MB. Free memory was 69.4MB in the beginning and 64.6MB in the end (delta: 4.9MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-20 06:14:59,694 INFO L158 Benchmark]: RCFGBuilder took 1968.67ms. Allocated memory was 127.9MB in the beginning and 169.9MB in the end (delta: 41.9MB). Free memory was 64.6MB in the beginning and 104.4MB in the end (delta: -39.9MB). Peak memory consumption was 40.7MB. Max. memory is 16.1GB. [2021-11-20 06:14:59,695 INFO L158 Benchmark]: TraceAbstraction took 483204.65ms. Allocated memory was 169.9MB in the beginning and 260.0MB in the end (delta: 90.2MB). Free memory was 103.4MB in the beginning and 142.7MB in the end (delta: -39.3MB). Peak memory consumption was 150.6MB. Max. memory is 16.1GB. [2021-11-20 06:14:59,695 INFO L158 Benchmark]: Witness Printer took 4.13ms. Allocated memory is still 260.0MB. Free memory is still 142.7MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 06:14:59,697 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36ms. Allocated memory is still 96.5MB. Free memory is still 51.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 3168.67ms. Allocated memory was 96.5MB in the beginning and 127.9MB in the end (delta: 31.5MB). Free memory was 55.0MB in the beginning and 77.8MB in the end (delta: -22.7MB). Peak memory consumption was 47.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 290.60ms. Allocated memory is still 127.9MB. Free memory was 77.8MB in the beginning and 69.4MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Preprocessor took 89.10ms. Allocated memory is still 127.9MB. Free memory was 69.4MB in the beginning and 64.6MB in the end (delta: 4.9MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 1968.67ms. Allocated memory was 127.9MB in the beginning and 169.9MB in the end (delta: 41.9MB). Free memory was 64.6MB in the beginning and 104.4MB in the end (delta: -39.9MB). Peak memory consumption was 40.7MB. Max. memory is 16.1GB. * TraceAbstraction took 483204.65ms. Allocated memory was 169.9MB in the beginning and 260.0MB in the end (delta: 90.2MB). Free memory was 103.4MB in the beginning and 142.7MB in the end (delta: -39.3MB). Peak memory consumption was 150.6MB. Max. memory is 16.1GB. * Witness Printer took 4.13ms. Allocated memory is still 260.0MB. Free memory is still 142.7MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification free ensures #res.base == #ptr.base && #res.offset == #ptr.offset; is not ensure(true) * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 223]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint, overapproximation of large string literal at line 7546, overapproximation of __builtin_umull_overflow at line 255, overapproximation of to_real at line -1. Possible FailurePath: [L2762-L2767] static struct aws_allocator s_can_fail_allocator_static = { .mem_acquire = s_can_fail_malloc_allocator, .mem_release = s_can_fail_free_allocator, .mem_realloc = s_can_fail_realloc_allocator, .mem_calloc = s_can_fail_calloc_allocator, }; [L7141] static __thread int tl_last_error = 0; [L7545-L7693] static struct aws_error_info errors[] = { [(AWS_ERROR_SUCCESS)-0x0000] = { .literal_name = "AWS_ERROR_SUCCESS", .error_code = (AWS_ERROR_SUCCESS), .error_str = ("Success."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_SUCCESS" ", " "Success.", } , [(AWS_ERROR_OOM)-0x0000] = { .literal_name = "AWS_ERROR_OOM", .error_code = (AWS_ERROR_OOM), .error_str = ("Out of memory."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_OOM" ", " "Out of memory.", } , [(AWS_ERROR_UNKNOWN)-0x0000] = { .literal_name = "AWS_ERROR_UNKNOWN", .error_code = (AWS_ERROR_UNKNOWN), .error_str = ("Unknown error."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_UNKNOWN" ", " "Unknown error.", } , [(AWS_ERROR_SHORT_BUFFER)-0x0000] = { .literal_name = "AWS_ERROR_SHORT_BUFFER", .error_code = (AWS_ERROR_SHORT_BUFFER), .error_str = ("Buffer is not large enough to hold result."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_SHORT_BUFFER" ", " "Buffer is not large enough to hold result.", } , [(AWS_ERROR_OVERFLOW_DETECTED)-0x0000] = { .literal_name = "AWS_ERROR_OVERFLOW_DETECTED", .error_code = (AWS_ERROR_OVERFLOW_DETECTED), .error_str = ("Fixed size value overflow was detected."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_OVERFLOW_DETECTED" ", " "Fixed size value overflow was detected.", } , [(AWS_ERROR_UNSUPPORTED_OPERATION)-0x0000] = { .literal_name = "AWS_ERROR_UNSUPPORTED_OPERATION", .error_code = (AWS_ERROR_UNSUPPORTED_OPERATION), .error_str = ("Unsupported operation."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_UNSUPPORTED_OPERATION" ", " "Unsupported operation.", } , [(AWS_ERROR_INVALID_BUFFER_SIZE)-0x0000] = { .literal_name = "AWS_ERROR_INVALID_BUFFER_SIZE", .error_code = (AWS_ERROR_INVALID_BUFFER_SIZE), .error_str = ("Invalid buffer size."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_INVALID_BUFFER_SIZE" ", " "Invalid buffer size.", } , [(AWS_ERROR_INVALID_HEX_STR)-0x0000] = { .literal_name = "AWS_ERROR_INVALID_HEX_STR", .error_code = (AWS_ERROR_INVALID_HEX_STR), .error_str = ("Invalid hex string."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_INVALID_HEX_STR" ", " "Invalid hex string.", } , [(AWS_ERROR_INVALID_BASE64_STR)-0x0000] = { .literal_name = "AWS_ERROR_INVALID_BASE64_STR", .error_code = (AWS_ERROR_INVALID_BASE64_STR), .error_str = ("Invalid base64 string."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_INVALID_BASE64_STR" ", " "Invalid base64 string.", } , [(AWS_ERROR_INVALID_INDEX)-0x0000] = { .literal_name = "AWS_ERROR_INVALID_INDEX", .error_code = (AWS_ERROR_INVALID_INDEX), .error_str = ("Invalid index for list access."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_INVALID_INDEX" ", " "Invalid index for list access.", } , [(AWS_ERROR_THREAD_INVALID_SETTINGS)-0x0000] = { .literal_name = "AWS_ERROR_THREAD_INVALID_SETTINGS", .error_code = (AWS_ERROR_THREAD_INVALID_SETTINGS), .error_str = ("Invalid thread settings."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_THREAD_INVALID_SETTINGS" ", " "Invalid thread settings.", } , [(AWS_ERROR_THREAD_INSUFFICIENT_RESOURCE)-0x0000] = { .literal_name = "AWS_ERROR_THREAD_INSUFFICIENT_RESOURCE", .error_code = (AWS_ERROR_THREAD_INSUFFICIENT_RESOURCE), .error_str = ("Insufficent resources for thread."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_THREAD_INSUFFICIENT_RESOURCE" ", " "Insufficent resources for thread.", } , [(AWS_ERROR_THREAD_NO_PERMISSIONS)-0x0000] = { .literal_name = "AWS_ERROR_THREAD_NO_PERMISSIONS", .error_code = (AWS_ERROR_THREAD_NO_PERMISSIONS), .error_str = ("Insufficient permissions for thread operation."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_THREAD_NO_PERMISSIONS" ", " "Insufficient permissions for thread operation.", } , [(AWS_ERROR_THREAD_NOT_JOINABLE)-0x0000] = { .literal_name = "AWS_ERROR_THREAD_NOT_JOINABLE", .error_code = (AWS_ERROR_THREAD_NOT_JOINABLE), .error_str = ("Thread not joinable."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_THREAD_NOT_JOINABLE" ", " "Thread not joinable.", } , [(AWS_ERROR_THREAD_NO_SUCH_THREAD_ID)-0x0000] = { .literal_name = "AWS_ERROR_THREAD_NO_SUCH_THREAD_ID", .error_code = (AWS_ERROR_THREAD_NO_SUCH_THREAD_ID), .error_str = ("No such thread ID."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_THREAD_NO_SUCH_THREAD_ID" ", " "No such thread ID.", } , [(AWS_ERROR_THREAD_DEADLOCK_DETECTED)-0x0000] = { .literal_name = "AWS_ERROR_THREAD_DEADLOCK_DETECTED", .error_code = (AWS_ERROR_THREAD_DEADLOCK_DETECTED), .error_str = ("Deadlock detected in thread."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_THREAD_DEADLOCK_DETECTED" ", " "Deadlock detected in thread.", } , [(AWS_ERROR_MUTEX_NOT_INIT)-0x0000] = { .literal_name = "AWS_ERROR_MUTEX_NOT_INIT", .error_code = (AWS_ERROR_MUTEX_NOT_INIT), .error_str = ("Mutex not initialized."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_MUTEX_NOT_INIT" ", " "Mutex not initialized.", } , [(AWS_ERROR_MUTEX_TIMEOUT)-0x0000] = { .literal_name = "AWS_ERROR_MUTEX_TIMEOUT", .error_code = (AWS_ERROR_MUTEX_TIMEOUT), .error_str = ("Mutex operation timed out."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_MUTEX_TIMEOUT" ", " "Mutex operation timed out.", } , [(AWS_ERROR_MUTEX_CALLER_NOT_OWNER)-0x0000] = { .literal_name = "AWS_ERROR_MUTEX_CALLER_NOT_OWNER", .error_code = (AWS_ERROR_MUTEX_CALLER_NOT_OWNER), .error_str = ("The caller of a mutex operation was not the owner."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_MUTEX_CALLER_NOT_OWNER" ", " "The caller of a mutex operation was not the owner.", } , [(AWS_ERROR_MUTEX_FAILED)-0x0000] = { .literal_name = "AWS_ERROR_MUTEX_FAILED", .error_code = (AWS_ERROR_MUTEX_FAILED), .error_str = ("Mutex operation failed."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_MUTEX_FAILED" ", " "Mutex operation failed.", } , [(AWS_ERROR_COND_VARIABLE_INIT_FAILED)-0x0000] = { .literal_name = "AWS_ERROR_COND_VARIABLE_INIT_FAILED", .error_code = (AWS_ERROR_COND_VARIABLE_INIT_FAILED), .error_str = ("Condition variable initialization failed."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_COND_VARIABLE_INIT_FAILED" ", " "Condition variable initialization failed.", } , [(AWS_ERROR_COND_VARIABLE_TIMED_OUT)-0x0000] = { .literal_name = "AWS_ERROR_COND_VARIABLE_TIMED_OUT", .error_code = (AWS_ERROR_COND_VARIABLE_TIMED_OUT), .error_str = ("Condition variable wait timed out."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_COND_VARIABLE_TIMED_OUT" ", " "Condition variable wait timed out.", } , [(AWS_ERROR_COND_VARIABLE_ERROR_UNKNOWN)-0x0000] = { .literal_name = "AWS_ERROR_COND_VARIABLE_ERROR_UNKNOWN", .error_code = (AWS_ERROR_COND_VARIABLE_ERROR_UNKNOWN), .error_str = ("Condition variable unknown error."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_COND_VARIABLE_ERROR_UNKNOWN" ", " "Condition variable unknown error.", } , [(AWS_ERROR_CLOCK_FAILURE)-0x0000] = { .literal_name = "AWS_ERROR_CLOCK_FAILURE", .error_code = (AWS_ERROR_CLOCK_FAILURE), .error_str = ("Clock operation failed."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_CLOCK_FAILURE" ", " "Clock operation failed.", } , [(AWS_ERROR_LIST_EMPTY)-0x0000] = { .literal_name = "AWS_ERROR_LIST_EMPTY", .error_code = (AWS_ERROR_LIST_EMPTY), .error_str = ("Empty list."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_LIST_EMPTY" ", " "Empty list.", } , [(AWS_ERROR_DEST_COPY_TOO_SMALL)-0x0000] = { .literal_name = "AWS_ERROR_DEST_COPY_TOO_SMALL", .error_code = (AWS_ERROR_DEST_COPY_TOO_SMALL), .error_str = ("Destination of copy is too small."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_DEST_COPY_TOO_SMALL" ", " "Destination of copy is too small.", } , [(AWS_ERROR_LIST_EXCEEDS_MAX_SIZE)-0x0000] = { .literal_name = "AWS_ERROR_LIST_EXCEEDS_MAX_SIZE", .error_code = (AWS_ERROR_LIST_EXCEEDS_MAX_SIZE), .error_str = ("A requested operation on a list would exceed it's max size."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_LIST_EXCEEDS_MAX_SIZE" ", " "A requested operation on a list would exceed it's max size.", } , [(AWS_ERROR_LIST_STATIC_MODE_CANT_SHRINK)-0x0000] = { .literal_name = "AWS_ERROR_LIST_STATIC_MODE_CANT_SHRINK", .error_code = (AWS_ERROR_LIST_STATIC_MODE_CANT_SHRINK), .error_str = ("Attempt to shrink a list in static mode."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_LIST_STATIC_MODE_CANT_SHRINK" ", " "Attempt to shrink a list in static mode.", } , [(AWS_ERROR_PRIORITY_QUEUE_FULL)-0x0000] = { .literal_name = "AWS_ERROR_PRIORITY_QUEUE_FULL", .error_code = (AWS_ERROR_PRIORITY_QUEUE_FULL), .error_str = ("Attempt to add items to a full preallocated queue in static mode."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_PRIORITY_QUEUE_FULL" ", " "Attempt to add items to a full preallocated queue in static mode.", } , [(AWS_ERROR_PRIORITY_QUEUE_EMPTY)-0x0000] = { .literal_name = "AWS_ERROR_PRIORITY_QUEUE_EMPTY", .error_code = (AWS_ERROR_PRIORITY_QUEUE_EMPTY), .error_str = ("Attempt to pop an item from an empty queue."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_PRIORITY_QUEUE_EMPTY" ", " "Attempt to pop an item from an empty queue.", } , [(AWS_ERROR_PRIORITY_QUEUE_BAD_NODE)-0x0000] = { .literal_name = "AWS_ERROR_PRIORITY_QUEUE_BAD_NODE", .error_code = (AWS_ERROR_PRIORITY_QUEUE_BAD_NODE), .error_str = ("Bad node handle passed to remove."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_PRIORITY_QUEUE_BAD_NODE" ", " "Bad node handle passed to remove.", } , [(AWS_ERROR_HASHTBL_ITEM_NOT_FOUND)-0x0000] = { .literal_name = "AWS_ERROR_HASHTBL_ITEM_NOT_FOUND", .error_code = (AWS_ERROR_HASHTBL_ITEM_NOT_FOUND), .error_str = ("Item not found in hash table."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_HASHTBL_ITEM_NOT_FOUND" ", " "Item not found in hash table.", } , [(AWS_ERROR_INVALID_DATE_STR)-0x0000] = { .literal_name = "AWS_ERROR_INVALID_DATE_STR", .error_code = (AWS_ERROR_INVALID_DATE_STR), .error_str = ("Date string is invalid and cannot be parsed."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_INVALID_DATE_STR" ", " "Date string is invalid and cannot be parsed.", } , [(AWS_ERROR_INVALID_ARGUMENT)-0x0000] = { .literal_name = "AWS_ERROR_INVALID_ARGUMENT", .error_code = (AWS_ERROR_INVALID_ARGUMENT), .error_str = ("An invalid argument was passed to a function."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_INVALID_ARGUMENT" ", " "An invalid argument was passed to a function.", } , [(AWS_ERROR_RANDOM_GEN_FAILED)-0x0000] = { .literal_name = "AWS_ERROR_RANDOM_GEN_FAILED", .error_code = (AWS_ERROR_RANDOM_GEN_FAILED), .error_str = ("A call to the random number generator failed. Retry later."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_RANDOM_GEN_FAILED" ", " "A call to the random number generator failed. Retry later.", } , [(AWS_ERROR_MALFORMED_INPUT_STRING)-0x0000] = { .literal_name = "AWS_ERROR_MALFORMED_INPUT_STRING", .error_code = (AWS_ERROR_MALFORMED_INPUT_STRING), .error_str = ("An input string was passed to a parser and the string was incorrectly formatted."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_MALFORMED_INPUT_STRING" ", " "An input string was passed to a parser and the string was incorrectly formatted.", } , [(AWS_ERROR_UNIMPLEMENTED)-0x0000] = { .literal_name = "AWS_ERROR_UNIMPLEMENTED", .error_code = (AWS_ERROR_UNIMPLEMENTED), .error_str = ("A function was called, but is not implemented."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_UNIMPLEMENTED" ", " "A function was called, but is not implemented.", } , [(AWS_ERROR_INVALID_STATE)-0x0000] = { .literal_name = "AWS_ERROR_INVALID_STATE", .error_code = (AWS_ERROR_INVALID_STATE), .error_str = ("An invalid state was encountered."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_INVALID_STATE" ", " "An invalid state was encountered.", } , [(AWS_ERROR_ENVIRONMENT_GET)-0x0000] = { .literal_name = "AWS_ERROR_ENVIRONMENT_GET", .error_code = (AWS_ERROR_ENVIRONMENT_GET), .error_str = ("System call failure when getting an environment variable."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_ENVIRONMENT_GET" ", " "System call failure when getting an environment variable.", } , [(AWS_ERROR_ENVIRONMENT_SET)-0x0000] = { .literal_name = "AWS_ERROR_ENVIRONMENT_SET", .error_code = (AWS_ERROR_ENVIRONMENT_SET), .error_str = ("System call failure when setting an environment variable."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_ENVIRONMENT_SET" ", " "System call failure when setting an environment variable.", } , [(AWS_ERROR_ENVIRONMENT_UNSET)-0x0000] = { .literal_name = "AWS_ERROR_ENVIRONMENT_UNSET", .error_code = (AWS_ERROR_ENVIRONMENT_UNSET), .error_str = ("System call failure when unsetting an environment variable."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_ENVIRONMENT_UNSET" ", " "System call failure when unsetting an environment variable.", } , [(AWS_ERROR_SYS_CALL_FAILURE)-0x0000] = { .literal_name = "AWS_ERROR_SYS_CALL_FAILURE", .error_code = (AWS_ERROR_SYS_CALL_FAILURE), .error_str = ("System call failure"), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_SYS_CALL_FAILURE" ", " "System call failure", } , [(AWS_ERROR_FILE_INVALID_PATH)-0x0000] = { .literal_name = "AWS_ERROR_FILE_INVALID_PATH", .error_code = (AWS_ERROR_FILE_INVALID_PATH), .error_str = ("Invalid file path."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_FILE_INVALID_PATH" ", " "Invalid file path.", } , [(AWS_ERROR_MAX_FDS_EXCEEDED)-0x0000] = { .literal_name = "AWS_ERROR_MAX_FDS_EXCEEDED", .error_code = (AWS_ERROR_MAX_FDS_EXCEEDED), .error_str = ("The maximum number of fds has been exceeded."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_MAX_FDS_EXCEEDED" ", " "The maximum number of fds has been exceeded.", } , [(AWS_ERROR_NO_PERMISSION)-0x0000] = { .literal_name = "AWS_ERROR_NO_PERMISSION", .error_code = (AWS_ERROR_NO_PERMISSION), .error_str = ("User does not have permission to perform the requested action."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_NO_PERMISSION" ", " "User does not have permission to perform the requested action.", } , [(AWS_ERROR_STREAM_UNSEEKABLE)-0x0000] = { .literal_name = "AWS_ERROR_STREAM_UNSEEKABLE", .error_code = (AWS_ERROR_STREAM_UNSEEKABLE), .error_str = ("Stream does not support seek operations"), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_STREAM_UNSEEKABLE" ", " "Stream does not support seek operations", } , }; [L7696-L7699] static struct aws_error_info_list s_list = { .error_list = errors, .count = (sizeof(errors) / sizeof((errors)[0])), }; [L7701-L7710] static struct aws_log_subject_info s_common_log_subject_infos[] = { { .subject_id = (AWS_LS_COMMON_GENERAL), .subject_name = ("aws-c-common"), .subject_description = ("Subject for aws-c-common logging that doesn't belong to any particular category") } , { .subject_id = (AWS_LS_COMMON_TASK_SCHEDULER), .subject_name = ("task-scheduler"), .subject_description = ("Subject for task scheduler or task specific logging.") } , }; [L7712-L7715] static struct aws_log_subject_info_list s_common_log_subject_list = { .subject_list = s_common_log_subject_infos, .count = (sizeof(s_common_log_subject_infos) / sizeof((s_common_log_subject_infos)[0])), }; [L7717-L7721] static _Bool s_common_library_initialized = 0 ; [L7748] CALL aws_array_list_clean_up_harness() [L7735] struct aws_array_list list = {0, __VERIFIER_nondet_ulong(), __VERIFIER_nondet_ulong(), __VERIFIER_nondet_ulong(), 0}; [L7738] CALL, EXPR aws_array_list_is_bounded(&list, 9223372036854775808U, 2) [L7005] EXPR list->item_size [L7004-L7005] _Bool item_size_is_bounded = list->item_size <= max_item_size; [L7008] EXPR list->length [L7007-L7008] _Bool length_is_bounded = list->length <= max_initial_item_allocation; [L7009] return item_size_is_bounded && length_is_bounded; [L7738] RET, EXPR aws_array_list_is_bounded(&list, 9223372036854775808U, 2) [L7738] CALL assume_abort_if_not(aws_array_list_is_bounded(&list, 9223372036854775808U, 2)) [L211] COND FALSE !(!cond) [L7738] RET assume_abort_if_not(aws_array_list_is_bounded(&list, 9223372036854775808U, 2)) [L7739] CALL ensure_array_list_has_allocated_data_member(&list) [L7013] EXPR list->current_size [L7013] list->current_size == 0 && list->length == 0 [L7013] EXPR list->length [L7013] list->current_size == 0 && list->length == 0 [L7013] COND TRUE list->current_size == 0 && list->length == 0 [L7014] EXPR list->data [L7014-L7016] CALL assume_abort_if_not(list->data == ((void *)0) ) [L211] COND FALSE !(!cond) [L7014-L7016] RET assume_abort_if_not(list->data == ((void *)0) ) [L7017] CALL, EXPR can_fail_allocator() [L2786] return &s_can_fail_allocator_static; [L7017] RET, EXPR can_fail_allocator() [L7017] list->alloc = can_fail_allocator() [L7739] RET ensure_array_list_has_allocated_data_member(&list) [L7740] CALL, EXPR aws_array_list_is_valid(&list) [L3263] COND FALSE !(!list) [L3268] size_t required_size = 0; [L3272] EXPR list->length [L3272] EXPR list->item_size [L3272] CALL, EXPR aws_mul_size_checked(list->length, list->item_size, &required_size) [L2588] CALL, EXPR aws_mul_u64_checked(a, b, (uint64_t *)r) [L2496] CALL __CPROVER_overflow_mult(a, b) [L254] unsigned long c; [L255] return __builtin_umull_overflow(a, b, &c); [L255] return __builtin_umull_overflow(a, b, &c); [L2496] RET __CPROVER_overflow_mult(a, b) [L2496] COND FALSE !(__CPROVER_overflow_mult(a, b)) [L2498] *r = a * b [L2499] return (0); [L2588] RET, EXPR aws_mul_u64_checked(a, b, (uint64_t *)r) [L2588] return aws_mul_u64_checked(a, b, (uint64_t *)r); [L3272] RET, EXPR aws_mul_size_checked(list->length, list->item_size, &required_size) [L3270-L3272] _Bool required_size_is_valid = (aws_mul_size_checked(list->length, list->item_size, &required_size) == (0)); [L3275] EXPR list->current_size [L3275] EXPR \read(required_size) [L3274-L3275] _Bool current_size_is_valid = (list->current_size >= required_size); [L3279] EXPR list->current_size [L3279-L3280] EXPR list->current_size == 0 && list->data == ((void *)0) [L3279] EXPR list->data [L3279-L3280] EXPR list->current_size == 0 && list->data == ((void *)0) [L3279-L3281] EXPR (list->current_size == 0 && list->data == ((void *)0) ) || ((((list->current_size)) == 0) || ((list->data))) [L3277-L3281] _Bool data_is_valid = ((list->current_size == 0 && list->data == ((void *)0) ) || ((((list->current_size)) == 0) || ((list->data)))); [L3284] EXPR list->item_size [L3283-L3284] _Bool item_size_is_valid = (list->item_size != 0); [L3285] return required_size_is_valid && current_size_is_valid && data_is_valid && item_size_is_valid; [L3268] size_t required_size = 0; [L3285] return required_size_is_valid && current_size_is_valid && data_is_valid && item_size_is_valid; [L7740] RET, EXPR aws_array_list_is_valid(&list) [L7740] CALL assume_abort_if_not(aws_array_list_is_valid(&list)) [L211] COND FALSE !(!cond) [L7740] RET assume_abort_if_not(aws_array_list_is_valid(&list)) [L7743] CALL aws_array_list_clean_up(&list) [L3302] CALL, EXPR aws_is_mem_zeroed(&(*list), sizeof(*list)) [L2335] size_t i; [L2336] const uint8_t *buf_u8 = (const uint8_t *)buf; [L2337] i = 0 [L2337] COND TRUE i < bufsize [L2338] buf_u8[i] [L2338] COND TRUE buf_u8[i] [L2339-L2341] return 0 ; [L3302] RET, EXPR aws_is_mem_zeroed(&(*list), sizeof(*list)) [L3302] EXPR aws_is_mem_zeroed(&(*list), sizeof(*list)) || aws_array_list_is_valid(list) [L3302] CALL, EXPR aws_array_list_is_valid(list) [L3263] COND FALSE !(!list) [L3268] size_t required_size = 0; [L3272] EXPR list->length [L3272] EXPR list->item_size [L3272] CALL, EXPR aws_mul_size_checked(list->length, list->item_size, &required_size) [L2588] CALL, EXPR aws_mul_u64_checked(a, b, (uint64_t *)r) [L2496] CALL __CPROVER_overflow_mult(a, b) [L254] unsigned long c; [L255] return __builtin_umull_overflow(a, b, &c); [L255] return __builtin_umull_overflow(a, b, &c); [L2496] RET __CPROVER_overflow_mult(a, b) [L2496] COND FALSE !(__CPROVER_overflow_mult(a, b)) [L2498] *r = a * b [L2499] return (0); [L2588] RET, EXPR aws_mul_u64_checked(a, b, (uint64_t *)r) [L2588] return aws_mul_u64_checked(a, b, (uint64_t *)r); [L3272] RET, EXPR aws_mul_size_checked(list->length, list->item_size, &required_size) [L3270-L3272] _Bool required_size_is_valid = (aws_mul_size_checked(list->length, list->item_size, &required_size) == (0)); [L3275] EXPR list->current_size [L3275] EXPR \read(required_size) [L3274-L3275] _Bool current_size_is_valid = (list->current_size >= required_size); [L3279] EXPR list->current_size [L3279-L3280] EXPR list->current_size == 0 && list->data == ((void *)0) [L3279] EXPR list->data [L3279-L3280] EXPR list->current_size == 0 && list->data == ((void *)0) [L3279-L3281] EXPR (list->current_size == 0 && list->data == ((void *)0) ) || ((((list->current_size)) == 0) || ((list->data))) [L3277-L3281] _Bool data_is_valid = ((list->current_size == 0 && list->data == ((void *)0) ) || ((((list->current_size)) == 0) || ((list->data)))); [L3284] EXPR list->item_size [L3283-L3284] _Bool item_size_is_valid = (list->item_size != 0); [L3285] return required_size_is_valid && current_size_is_valid && data_is_valid && item_size_is_valid; [L3268] size_t required_size = 0; [L3285] return required_size_is_valid && current_size_is_valid && data_is_valid && item_size_is_valid; [L3302] RET, EXPR aws_array_list_is_valid(list) [L3302] EXPR aws_is_mem_zeroed(&(*list), sizeof(*list)) || aws_array_list_is_valid(list) [L3302] CALL assume_abort_if_not((aws_is_mem_zeroed(&(*list), sizeof(*list)) || aws_array_list_is_valid(list))) [L211] COND FALSE !(!cond) [L3302] RET assume_abort_if_not((aws_is_mem_zeroed(&(*list), sizeof(*list)) || aws_array_list_is_valid(list))) [L3303] EXPR list->alloc [L3303] list->alloc && list->data [L3303] EXPR list->data [L3303] list->alloc && list->data [L3303] COND FALSE !(list->alloc && list->data) [L3307] FCALL memset(&(*list), 0, sizeof(*list)) [L7743] RET aws_array_list_clean_up(&list) [L7746] CALL, EXPR aws_is_mem_zeroed(&(list), sizeof(list)) [L2335] size_t i; [L2336] const uint8_t *buf_u8 = (const uint8_t *)buf; [L2337] i = 0 [L2337] COND TRUE i < bufsize [L2338] buf_u8[i] [L2338] COND FALSE !(buf_u8[i]) [L2337] ++i [L2337] COND TRUE i < bufsize [L2338] buf_u8[i] [L2338] COND FALSE !(buf_u8[i]) [L2337] ++i [L2337] COND TRUE i < bufsize [L2338] buf_u8[i] [L2338] COND FALSE !(buf_u8[i]) [L2337] ++i [L2337] COND TRUE i < bufsize [L2338] buf_u8[i] [L2338] COND FALSE !(buf_u8[i]) [L2337] ++i [L2337] COND TRUE i < bufsize [L2338] buf_u8[i] [L2338] COND FALSE !(buf_u8[i]) [L2337] ++i [L2337] COND TRUE i < bufsize [L2338] buf_u8[i] [L2338] COND TRUE buf_u8[i] [L2339-L2341] return 0 ; [L7746] RET, EXPR aws_is_mem_zeroed(&(list), sizeof(list)) [L7746] CALL __VERIFIER_assert(aws_is_mem_zeroed(&(list), sizeof(list))) [L223] COND TRUE !cond [L223] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 14 procedures, 114 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 483.1s, OverallIterations: 19, TraceHistogramMax: 12, PathProgramHistogramMax: 7, EmptinessCheckTime: 0.1s, AutomataDifference: 27.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 981 SdHoareTripleChecker+Valid, 9.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 885 mSDsluCounter, 20764 SdHoareTripleChecker+Invalid, 7.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 1387 IncrementalHoareTripleChecker+Unchecked, 18528 mSDsCounter, 358 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5450 IncrementalHoareTripleChecker+Invalid, 7195 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 358 mSolverCounterUnsat, 2236 mSDtfsCounter, 5450 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2798 GetRequests, 2439 SyntacticMatches, 10 SemanticMatches, 349 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2388 ImplicationChecksByTransitivity, 40.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=171occurred in iteration=18, InterpolantAutomatonStates: 263, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 18 MinimizatonAttempts, 88 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.0s SsaConstructionTime, 26.4s SatisfiabilityAnalysisTime, 422.1s InterpolantComputationTime, 1939 NumberOfCodeBlocks, 1920 NumberOfCodeBlocksAsserted, 35 NumberOfCheckSat, 2904 ConstructedInterpolants, 110 QuantifiedInterpolants, 21728 SizeOfPredicates, 178 NumberOfNonLiveVariables, 37476 ConjunctsInSsa, 706 ConjunctsInUnsatCore, 28 InterpolantComputations, 8 PerfectInterpolantSequences, 1338/1721 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-11-20 06:14:59,914 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2021-11-20 06:14:59,980 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 137 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_array_list_clean_up_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-64bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF --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 5ba879a31f48d1f1f7d1dc7f928910bfb7ed0629fadb04ed483f94e60bfd5ef0 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 06:15:02,586 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 06:15:02,591 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 06:15:02,663 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 06:15:02,664 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 06:15:02,669 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 06:15:02,672 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 06:15:02,681 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 06:15:02,684 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 06:15:02,694 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 06:15:02,695 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 06:15:02,698 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 06:15:02,699 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 06:15:02,702 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 06:15:02,706 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 06:15:02,713 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 06:15:02,714 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 06:15:02,715 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 06:15:02,718 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 06:15:02,726 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 06:15:02,729 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 06:15:02,731 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 06:15:02,734 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 06:15:02,735 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 06:15:02,739 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 06:15:02,740 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 06:15:02,740 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 06:15:02,742 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 06:15:02,742 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 06:15:02,744 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 06:15:02,744 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 06:15:02,745 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 06:15:02,747 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 06:15:02,748 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 06:15:02,749 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 06:15:02,750 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 06:15:02,751 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 06:15:02,751 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 06:15:02,752 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 06:15:02,753 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 06:15:02,754 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 06:15:02,755 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-64bit-Automizer_Bitvector.epf [2021-11-20 06:15:02,787 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 06:15:02,787 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 06:15:02,788 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 06:15:02,788 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 06:15:02,789 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 06:15:02,789 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 06:15:02,790 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 06:15:02,790 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 06:15:02,791 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 06:15:02,791 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 06:15:02,791 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 06:15:02,792 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 06:15:02,792 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 06:15:02,792 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 06:15:02,792 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-20 06:15:02,793 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-20 06:15:02,793 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-20 06:15:02,793 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 06:15:02,794 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 06:15:02,794 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 06:15:02,794 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 06:15:02,795 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 06:15:02,795 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 06:15:02,795 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:15:02,796 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 06:15:02,796 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 06:15:02,796 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 06:15:02,796 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-20 06:15:02,797 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-20 06:15:02,797 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 06:15:02,797 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 06:15:02,798 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 06:15:02,798 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 06:15:02,798 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 06:15:02,798 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5ba879a31f48d1f1f7d1dc7f928910bfb7ed0629fadb04ed483f94e60bfd5ef0 [2021-11-20 06:15:03,234 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 06:15:03,261 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 06:15:03,265 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 06:15:03,267 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 06:15:03,268 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 06:15:03,270 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/aws-c-common/aws_array_list_clean_up_harness.i [2021-11-20 06:15:03,363 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/data/f7122b36e/b0566b1c98054017adc2fc473aa0b54f/FLAGed8dcc082 [2021-11-20 06:15:04,457 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 06:15:04,458 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/sv-benchmarks/c/aws-c-common/aws_array_list_clean_up_harness.i [2021-11-20 06:15:04,541 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/data/f7122b36e/b0566b1c98054017adc2fc473aa0b54f/FLAGed8dcc082 [2021-11-20 06:15:04,858 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/data/f7122b36e/b0566b1c98054017adc2fc473aa0b54f [2021-11-20 06:15:04,861 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 06:15:04,862 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 06:15:04,864 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 06:15:04,864 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 06:15:04,868 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 06:15:04,869 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:15:04" (1/1) ... [2021-11-20 06:15:04,870 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e3aca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:15:04, skipping insertion in model container [2021-11-20 06:15:04,871 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:15:04" (1/1) ... [2021-11-20 06:15:04,880 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 06:15:05,005 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 06:15:05,290 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_6a7069e7-bf2b-40cd-a985-b703942c57e7/sv-benchmarks/c/aws-c-common/aws_array_list_clean_up_harness.i[4497,4510] [2021-11-20 06:15:05,298 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_6a7069e7-bf2b-40cd-a985-b703942c57e7/sv-benchmarks/c/aws-c-common/aws_array_list_clean_up_harness.i[4557,4570] [2021-11-20 06:15:06,476 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-20 06:15:06,573 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:15:06,574 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:15:06,575 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:15:06,576 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:15:06,578 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:15:06,616 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:15:06,619 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:15:06,622 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:15:06,624 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:15:06,641 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:15:06,642 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:15:06,643 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:15:06,644 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:15:07,174 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-20 06:15:07,175 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-20 06:15:07,177 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-20 06:15:07,178 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-20 06:15:07,180 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-20 06:15:07,181 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-20 06:15:07,182 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-20 06:15:07,183 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-20 06:15:07,184 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-20 06:15:07,185 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-20 06:15:07,338 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:15:07,352 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:15:07,465 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:15:07,521 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-20 06:15:07,558 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 06:15:07,563 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_6a7069e7-bf2b-40cd-a985-b703942c57e7/sv-benchmarks/c/aws-c-common/aws_array_list_clean_up_harness.i[4497,4510] [2021-11-20 06:15:07,564 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/sv-benchmarks/c/aws-c-common/aws_array_list_clean_up_harness.i[4557,4570] [2021-11-20 06:15:07,603 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-20 06:15:07,625 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:15:07,626 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:15:07,627 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:15:07,627 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:15:07,628 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:15:07,638 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:15:07,639 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:15:07,641 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:15:07,641 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:15:07,643 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:15:07,644 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:15:07,645 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:15:07,645 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:15:07,692 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-20 06:15:07,693 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-20 06:15:07,694 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-20 06:15:07,696 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-20 06:15:07,697 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-20 06:15:07,698 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-20 06:15:07,699 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-20 06:15:07,699 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-20 06:15:07,700 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-20 06:15:07,701 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-20 06:15:07,725 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:15:07,732 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:15:07,798 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:15:07,821 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 06:15:07,838 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_6a7069e7-bf2b-40cd-a985-b703942c57e7/sv-benchmarks/c/aws-c-common/aws_array_list_clean_up_harness.i[4497,4510] [2021-11-20 06:15:07,839 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_6a7069e7-bf2b-40cd-a985-b703942c57e7/sv-benchmarks/c/aws-c-common/aws_array_list_clean_up_harness.i[4557,4570] [2021-11-20 06:15:07,889 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-20 06:15:07,906 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:15:07,906 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:15:07,907 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:15:07,908 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:15:07,908 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:15:07,916 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:15:07,917 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:15:07,918 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:15:07,918 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:15:07,920 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:15:07,920 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:15:07,921 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:15:07,921 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:15:07,979 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-20 06:15:07,980 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-20 06:15:07,981 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-20 06:15:07,983 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-20 06:15:07,984 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-20 06:15:07,984 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-20 06:15:07,986 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-20 06:15:07,987 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-20 06:15:07,988 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-20 06:15:07,988 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-20 06:15:08,022 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:15:08,033 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:15:08,103 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:15:08,473 INFO L208 MainTranslator]: Completed translation [2021-11-20 06:15:08,474 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:15:08 WrapperNode [2021-11-20 06:15:08,474 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 06:15:08,475 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 06:15:08,476 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 06:15:08,476 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 06:15:08,485 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:15:08" (1/1) ... [2021-11-20 06:15:08,609 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:15:08" (1/1) ... [2021-11-20 06:15:08,713 INFO L137 Inliner]: procedures = 710, calls = 1553, calls flagged for inlining = 48, calls inlined = 7, statements flattened = 576 [2021-11-20 06:15:08,714 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 06:15:08,723 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 06:15:08,723 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 06:15:08,723 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 06:15:08,734 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:15:08" (1/1) ... [2021-11-20 06:15:08,734 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:15:08" (1/1) ... [2021-11-20 06:15:08,746 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:15:08" (1/1) ... [2021-11-20 06:15:08,746 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:15:08" (1/1) ... [2021-11-20 06:15:08,794 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:15:08" (1/1) ... [2021-11-20 06:15:08,801 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:15:08" (1/1) ... [2021-11-20 06:15:08,826 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:15:08" (1/1) ... [2021-11-20 06:15:08,849 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 06:15:08,862 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 06:15:08,862 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 06:15:08,892 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 06:15:08,893 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:15:08" (1/1) ... [2021-11-20 06:15:08,903 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:15:08,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:15:08,941 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 06:15:08,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 06:15:09,005 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_mem_zeroed [2021-11-20 06:15:09,006 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_mem_zeroed [2021-11-20 06:15:09,006 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 06:15:09,006 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_bounded [2021-11-20 06:15:09,007 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_bounded [2021-11-20 06:15:09,007 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_valid [2021-11-20 06:15:09,007 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_valid [2021-11-20 06:15:09,008 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-11-20 06:15:09,008 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-11-20 06:15:09,008 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-20 06:15:09,008 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-20 06:15:09,008 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-20 06:15:09,009 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2021-11-20 06:15:09,009 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2021-11-20 06:15:09,009 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-20 06:15:09,009 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-20 06:15:09,009 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 06:15:09,010 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 06:15:09,010 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-20 06:15:09,010 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 06:15:09,010 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 06:15:09,010 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-11-20 06:15:09,011 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-11-20 06:15:09,011 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-20 06:15:09,011 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-20 06:15:09,012 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2021-11-20 06:15:09,012 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2021-11-20 06:15:09,012 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mem_release [2021-11-20 06:15:09,012 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mem_release [2021-11-20 06:15:09,013 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-20 06:15:09,014 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-20 06:15:09,018 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-20 06:15:09,019 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-20 06:15:09,019 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 06:15:09,019 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-20 06:15:09,019 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-20 06:15:09,020 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-20 06:15:09,020 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2021-11-20 06:15:09,021 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2021-11-20 06:15:09,021 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2021-11-20 06:15:09,027 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2021-11-20 06:15:09,433 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 06:15:09,435 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 06:15:11,656 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 06:15:11,675 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 06:15:11,676 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-20 06:15:11,680 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:15:11 BoogieIcfgContainer [2021-11-20 06:15:11,680 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 06:15:11,685 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 06:15:11,685 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 06:15:11,688 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 06:15:11,689 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 06:15:04" (1/3) ... [2021-11-20 06:15:11,690 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@691cd515 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:15:11, skipping insertion in model container [2021-11-20 06:15:11,690 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:15:08" (2/3) ... [2021-11-20 06:15:11,691 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@691cd515 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:15:11, skipping insertion in model container [2021-11-20 06:15:11,691 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:15:11" (3/3) ... [2021-11-20 06:15:11,692 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_array_list_clean_up_harness.i [2021-11-20 06:15:11,700 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 06:15:11,700 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 06:15:11,790 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 06:15:11,805 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 06:15:11,806 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 06:15:11,836 INFO L276 IsEmpty]: Start isEmpty. Operand has 114 states, 78 states have (on average 1.2564102564102564) internal successors, (98), 78 states have internal predecessors, (98), 22 states have call successors, (22), 13 states have call predecessors, (22), 13 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-11-20 06:15:11,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-20 06:15:11,854 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:15:11,855 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:15:11,856 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:15:11,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:15:11,863 INFO L85 PathProgramCache]: Analyzing trace with hash 213945854, now seen corresponding path program 1 times [2021-11-20 06:15:11,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:15:11,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1057065025] [2021-11-20 06:15:11,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:15:11,886 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:15:11,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:15:11,891 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:15:11,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-20 06:15:12,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:15:12,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 1173 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-20 06:15:12,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:15:13,273 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-20 06:15:13,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:15:13,569 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-20 06:15:13,570 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:15:13,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1057065025] [2021-11-20 06:15:13,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1057065025] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 06:15:13,572 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:15:13,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2021-11-20 06:15:13,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387662237] [2021-11-20 06:15:13,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:15:13,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 06:15:13,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:15:13,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 06:15:13,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 06:15:13,635 INFO L87 Difference]: Start difference. First operand has 114 states, 78 states have (on average 1.2564102564102564) internal successors, (98), 78 states have internal predecessors, (98), 22 states have call successors, (22), 13 states have call predecessors, (22), 13 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Second operand has 2 states, 2 states have (on average 17.5) internal successors, (35), 2 states have internal predecessors, (35), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-20 06:15:13,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:15:13,711 INFO L93 Difference]: Finished difference Result 221 states and 288 transitions. [2021-11-20 06:15:13,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 06:15:13,715 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 17.5) internal successors, (35), 2 states have internal predecessors, (35), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 65 [2021-11-20 06:15:13,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:15:13,736 INFO L225 Difference]: With dead ends: 221 [2021-11-20 06:15:13,737 INFO L226 Difference]: Without dead ends: 107 [2021-11-20 06:15:13,743 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 06:15:13,749 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:15:13,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:15:13,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-11-20 06:15:13,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2021-11-20 06:15:13,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 72 states have (on average 1.2083333333333333) internal successors, (87), 72 states have internal predecessors, (87), 22 states have call successors, (22), 13 states have call predecessors, (22), 12 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-11-20 06:15:13,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 130 transitions. [2021-11-20 06:15:13,838 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 130 transitions. Word has length 65 [2021-11-20 06:15:13,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:15:13,839 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 130 transitions. [2021-11-20 06:15:13,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 17.5) internal successors, (35), 2 states have internal predecessors, (35), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-20 06:15:13,840 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 130 transitions. [2021-11-20 06:15:13,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-20 06:15:13,857 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:15:13,858 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:15:13,897 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-20 06:15:14,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:15:14,083 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:15:14,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:15:14,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1475951998, now seen corresponding path program 1 times [2021-11-20 06:15:14,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:15:14,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [185001523] [2021-11-20 06:15:14,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:15:14,087 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:15:14,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:15:14,089 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:15:14,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-20 06:15:14,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:15:14,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 1190 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 06:15:14,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:15:15,194 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-20 06:15:15,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:15:15,570 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-20 06:15:15,571 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:15:15,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [185001523] [2021-11-20 06:15:15,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [185001523] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:15:15,571 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:15:15,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 6 [2021-11-20 06:15:15,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716817663] [2021-11-20 06:15:15,572 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:15:15,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 06:15:15,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:15:15,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 06:15:15,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:15:15,574 INFO L87 Difference]: Start difference. First operand 107 states and 130 transitions. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-20 06:15:15,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:15:15,842 INFO L93 Difference]: Finished difference Result 182 states and 221 transitions. [2021-11-20 06:15:15,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:15:15,851 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 71 [2021-11-20 06:15:15,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:15:15,856 INFO L225 Difference]: With dead ends: 182 [2021-11-20 06:15:15,858 INFO L226 Difference]: Without dead ends: 109 [2021-11-20 06:15:15,859 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:15:15,862 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 49 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:15:15,863 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 314 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 06:15:15,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-11-20 06:15:15,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2021-11-20 06:15:15,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 73 states have (on average 1.2054794520547945) internal successors, (88), 74 states have internal predecessors, (88), 22 states have call successors, (22), 13 states have call predecessors, (22), 13 states have return successors, (22), 21 states have call predecessors, (22), 21 states have call successors, (22) [2021-11-20 06:15:15,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 132 transitions. [2021-11-20 06:15:15,897 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 132 transitions. Word has length 71 [2021-11-20 06:15:15,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:15:15,898 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 132 transitions. [2021-11-20 06:15:15,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-20 06:15:15,898 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 132 transitions. [2021-11-20 06:15:15,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-20 06:15:15,903 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:15:15,904 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:15:15,939 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-20 06:15:16,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:15:16,133 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:15:16,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:15:16,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1492369144, now seen corresponding path program 1 times [2021-11-20 06:15:16,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:15:16,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1076555935] [2021-11-20 06:15:16,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:15:16,138 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:15:16,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:15:16,140 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:15:16,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-20 06:15:17,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:15:17,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 1267 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:15:17,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:15:17,342 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-20 06:15:17,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:15:17,642 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-20 06:15:17,643 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:15:17,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1076555935] [2021-11-20 06:15:17,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1076555935] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:15:17,644 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:15:17,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-20 06:15:17,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738689797] [2021-11-20 06:15:17,644 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:15:17,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:15:17,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:15:17,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:15:17,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:15:17,647 INFO L87 Difference]: Start difference. First operand 109 states and 132 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-20 06:15:17,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:15:17,774 INFO L93 Difference]: Finished difference Result 189 states and 231 transitions. [2021-11-20 06:15:17,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:15:17,778 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 86 [2021-11-20 06:15:17,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:15:17,781 INFO L225 Difference]: With dead ends: 189 [2021-11-20 06:15:17,781 INFO L226 Difference]: Without dead ends: 114 [2021-11-20 06:15:17,782 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:15:17,783 INFO L933 BasicCegarLoop]: 129 mSDtfsCounter, 10 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:15:17,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 377 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:15:17,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-11-20 06:15:17,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 111. [2021-11-20 06:15:17,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 75 states have (on average 1.2) internal successors, (90), 76 states have internal predecessors, (90), 22 states have call successors, (22), 13 states have call predecessors, (22), 13 states have return successors, (22), 21 states have call predecessors, (22), 21 states have call successors, (22) [2021-11-20 06:15:17,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 134 transitions. [2021-11-20 06:15:17,801 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 134 transitions. Word has length 86 [2021-11-20 06:15:17,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:15:17,802 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 134 transitions. [2021-11-20 06:15:17,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-20 06:15:17,803 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 134 transitions. [2021-11-20 06:15:17,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-20 06:15:17,805 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:15:17,805 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:15:17,847 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-20 06:15:18,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:15:18,025 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:15:18,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:15:18,026 INFO L85 PathProgramCache]: Analyzing trace with hash 874325450, now seen corresponding path program 1 times [2021-11-20 06:15:18,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:15:18,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [978702926] [2021-11-20 06:15:18,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:15:18,030 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:15:18,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:15:18,031 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:15:18,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-20 06:15:19,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:15:19,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 1270 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 06:15:19,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:15:19,345 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 06:15:19,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:15:19,746 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-20 06:15:19,746 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:15:19,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [978702926] [2021-11-20 06:15:19,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [978702926] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 06:15:19,747 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:15:19,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-20 06:15:19,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080055747] [2021-11-20 06:15:19,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:15:19,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:15:19,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:15:19,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:15:19,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:15:19,750 INFO L87 Difference]: Start difference. First operand 111 states and 134 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-20 06:15:19,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:15:19,844 INFO L93 Difference]: Finished difference Result 193 states and 233 transitions. [2021-11-20 06:15:19,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:15:19,845 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 86 [2021-11-20 06:15:19,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:15:19,847 INFO L225 Difference]: With dead ends: 193 [2021-11-20 06:15:19,847 INFO L226 Difference]: Without dead ends: 116 [2021-11-20 06:15:19,848 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:15:19,849 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 7 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:15:19,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 370 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:15:19,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-11-20 06:15:19,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 112. [2021-11-20 06:15:19,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 76 states have (on average 1.1973684210526316) internal successors, (91), 77 states have internal predecessors, (91), 22 states have call successors, (22), 13 states have call predecessors, (22), 13 states have return successors, (22), 21 states have call predecessors, (22), 21 states have call successors, (22) [2021-11-20 06:15:19,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 135 transitions. [2021-11-20 06:15:19,866 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 135 transitions. Word has length 86 [2021-11-20 06:15:19,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:15:19,867 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 135 transitions. [2021-11-20 06:15:19,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-20 06:15:19,868 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 135 transitions. [2021-11-20 06:15:19,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-20 06:15:19,869 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:15:19,870 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:15:19,918 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-20 06:15:20,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:15:20,095 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:15:20,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:15:20,096 INFO L85 PathProgramCache]: Analyzing trace with hash 261547704, now seen corresponding path program 1 times [2021-11-20 06:15:20,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:15:20,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1707915293] [2021-11-20 06:15:20,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:15:20,099 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:15:20,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:15:20,101 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:15:20,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-20 06:15:21,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:15:21,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 1274 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 06:15:21,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:15:21,354 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 06:15:21,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:15:21,619 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-20 06:15:21,620 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:15:21,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1707915293] [2021-11-20 06:15:21,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1707915293] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 06:15:21,620 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:15:21,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 5 [2021-11-20 06:15:21,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937197623] [2021-11-20 06:15:21,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:15:21,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:15:21,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:15:21,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:15:21,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:15:21,622 INFO L87 Difference]: Start difference. First operand 112 states and 135 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-20 06:15:21,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:15:21,685 INFO L93 Difference]: Finished difference Result 160 states and 195 transitions. [2021-11-20 06:15:21,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 06:15:21,687 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) Word has length 86 [2021-11-20 06:15:21,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:15:21,689 INFO L225 Difference]: With dead ends: 160 [2021-11-20 06:15:21,689 INFO L226 Difference]: Without dead ends: 120 [2021-11-20 06:15:21,689 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:15:21,690 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 4 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:15:21,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 517 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:15:21,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-11-20 06:15:21,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 116. [2021-11-20 06:15:21,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 79 states have (on average 1.1898734177215189) internal successors, (94), 80 states have internal predecessors, (94), 22 states have call successors, (22), 13 states have call predecessors, (22), 14 states have return successors, (24), 22 states have call predecessors, (24), 21 states have call successors, (24) [2021-11-20 06:15:21,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 140 transitions. [2021-11-20 06:15:21,726 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 140 transitions. Word has length 86 [2021-11-20 06:15:21,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:15:21,731 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 140 transitions. [2021-11-20 06:15:21,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-20 06:15:21,731 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 140 transitions. [2021-11-20 06:15:21,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-20 06:15:21,736 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:15:21,737 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-11-20 06:15:21,779 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-20 06:15:21,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:15:21,951 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:15:21,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:15:21,952 INFO L85 PathProgramCache]: Analyzing trace with hash -2061885074, now seen corresponding path program 1 times [2021-11-20 06:15:21,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:15:21,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1403051299] [2021-11-20 06:15:21,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:15:21,954 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:15:21,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:15:21,955 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:15:21,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-20 06:15:22,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:15:22,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 1276 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 06:15:22,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:15:23,221 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 06:15:23,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:15:23,695 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-20 06:15:23,695 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:15:23,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1403051299] [2021-11-20 06:15:23,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1403051299] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:15:23,696 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:15:23,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-11-20 06:15:23,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793677110] [2021-11-20 06:15:23,696 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:15:23,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 06:15:23,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:15:23,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 06:15:23,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:15:23,698 INFO L87 Difference]: Start difference. First operand 116 states and 140 transitions. Second operand has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-20 06:15:24,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:15:24,014 INFO L93 Difference]: Finished difference Result 214 states and 262 transitions. [2021-11-20 06:15:24,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 06:15:24,015 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 89 [2021-11-20 06:15:24,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:15:24,017 INFO L225 Difference]: With dead ends: 214 [2021-11-20 06:15:24,017 INFO L226 Difference]: Without dead ends: 131 [2021-11-20 06:15:24,018 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:15:24,019 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 30 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:15:24,019 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 511 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 06:15:24,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-11-20 06:15:24,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 125. [2021-11-20 06:15:24,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 88 states have (on average 1.2045454545454546) internal successors, (106), 89 states have internal predecessors, (106), 22 states have call successors, (22), 13 states have call predecessors, (22), 14 states have return successors, (24), 22 states have call predecessors, (24), 21 states have call successors, (24) [2021-11-20 06:15:24,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 152 transitions. [2021-11-20 06:15:24,035 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 152 transitions. Word has length 89 [2021-11-20 06:15:24,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:15:24,036 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 152 transitions. [2021-11-20 06:15:24,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-20 06:15:24,036 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 152 transitions. [2021-11-20 06:15:24,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-20 06:15:24,038 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:15:24,039 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:15:24,072 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-20 06:15:24,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:15:24,255 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:15:24,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:15:24,255 INFO L85 PathProgramCache]: Analyzing trace with hash -932359201, now seen corresponding path program 1 times [2021-11-20 06:15:24,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:15:24,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [615442853] [2021-11-20 06:15:24,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:15:24,259 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:15:24,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:15:24,260 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:15:24,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-20 06:15:25,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:15:25,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 1296 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 06:15:25,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:15:25,546 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-20 06:15:25,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:15:25,918 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-20 06:15:25,918 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:15:25,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [615442853] [2021-11-20 06:15:25,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [615442853] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:15:25,919 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:15:25,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-11-20 06:15:25,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117419867] [2021-11-20 06:15:25,919 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:15:25,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:15:25,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:15:25,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:15:25,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:15:25,921 INFO L87 Difference]: Start difference. First operand 125 states and 152 transitions. Second operand has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 4 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-20 06:15:26,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:15:26,309 INFO L93 Difference]: Finished difference Result 177 states and 214 transitions. [2021-11-20 06:15:26,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 06:15:26,311 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 4 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 92 [2021-11-20 06:15:26,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:15:26,313 INFO L225 Difference]: With dead ends: 177 [2021-11-20 06:15:26,313 INFO L226 Difference]: Without dead ends: 123 [2021-11-20 06:15:26,314 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:15:26,315 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 46 mSDsluCounter, 505 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 621 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:15:26,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 621 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 06:15:26,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-11-20 06:15:26,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2021-11-20 06:15:26,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 87 states have (on average 1.1954022988505748) internal successors, (104), 87 states have internal predecessors, (104), 22 states have call successors, (22), 13 states have call predecessors, (22), 13 states have return successors, (23), 22 states have call predecessors, (23), 21 states have call successors, (23) [2021-11-20 06:15:26,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 149 transitions. [2021-11-20 06:15:26,329 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 149 transitions. Word has length 92 [2021-11-20 06:15:26,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:15:26,330 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 149 transitions. [2021-11-20 06:15:26,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 4 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-20 06:15:26,330 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 149 transitions. [2021-11-20 06:15:26,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-20 06:15:26,332 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:15:26,332 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:15:26,373 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-20 06:15:26,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:15:26,547 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:15:26,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:15:26,548 INFO L85 PathProgramCache]: Analyzing trace with hash -778390853, now seen corresponding path program 1 times [2021-11-20 06:15:26,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:15:26,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2059027719] [2021-11-20 06:15:26,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:15:26,550 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:15:26,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:15:26,551 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:15:26,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-20 06:15:27,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:15:27,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 1376 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:15:27,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:15:27,934 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-20 06:15:27,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:15:28,315 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-20 06:15:28,315 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:15:28,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2059027719] [2021-11-20 06:15:28,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2059027719] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:15:28,316 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:15:28,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-20 06:15:28,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624943197] [2021-11-20 06:15:28,316 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:15:28,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 06:15:28,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:15:28,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 06:15:28,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:15:28,318 INFO L87 Difference]: Start difference. First operand 123 states and 149 transitions. Second operand has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-20 06:15:28,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:15:28,399 INFO L93 Difference]: Finished difference Result 157 states and 189 transitions. [2021-11-20 06:15:28,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 06:15:28,400 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 107 [2021-11-20 06:15:28,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:15:28,403 INFO L225 Difference]: With dead ends: 157 [2021-11-20 06:15:28,403 INFO L226 Difference]: Without dead ends: 125 [2021-11-20 06:15:28,403 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:15:28,404 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 4 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:15:28,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 505 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:15:28,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-11-20 06:15:28,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2021-11-20 06:15:28,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 89 states have (on average 1.1910112359550562) internal successors, (106), 89 states have internal predecessors, (106), 22 states have call successors, (22), 13 states have call predecessors, (22), 13 states have return successors, (23), 22 states have call predecessors, (23), 21 states have call successors, (23) [2021-11-20 06:15:28,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 151 transitions. [2021-11-20 06:15:28,422 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 151 transitions. Word has length 107 [2021-11-20 06:15:28,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:15:28,424 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 151 transitions. [2021-11-20 06:15:28,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-20 06:15:28,425 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 151 transitions. [2021-11-20 06:15:28,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-20 06:15:28,432 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:15:28,432 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:15:28,476 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-20 06:15:28,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:15:28,655 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:15:28,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:15:28,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1537767131, now seen corresponding path program 1 times [2021-11-20 06:15:28,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:15:28,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1596954965] [2021-11-20 06:15:28,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:15:28,658 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:15:28,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:15:28,659 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:15:28,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-20 06:15:29,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:15:29,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 1386 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 06:15:29,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:15:30,131 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-20 06:15:30,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:15:30,660 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-20 06:15:30,660 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:15:30,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1596954965] [2021-11-20 06:15:30,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1596954965] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:15:30,661 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:15:30,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-11-20 06:15:30,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745915053] [2021-11-20 06:15:30,661 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:15:30,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 06:15:30,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:15:30,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 06:15:30,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:15:30,663 INFO L87 Difference]: Start difference. First operand 125 states and 151 transitions. Second operand has 10 states, 10 states have (on average 6.0) internal successors, (60), 10 states have internal predecessors, (60), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-20 06:15:31,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:15:31,069 INFO L93 Difference]: Finished difference Result 161 states and 195 transitions. [2021-11-20 06:15:31,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 06:15:31,071 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.0) internal successors, (60), 10 states have internal predecessors, (60), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 109 [2021-11-20 06:15:31,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:15:31,073 INFO L225 Difference]: With dead ends: 161 [2021-11-20 06:15:31,073 INFO L226 Difference]: Without dead ends: 129 [2021-11-20 06:15:31,073 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-11-20 06:15:31,074 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 17 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:15:31,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 507 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 06:15:31,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-11-20 06:15:31,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2021-11-20 06:15:31,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 93 states have (on average 1.1827956989247312) internal successors, (110), 93 states have internal predecessors, (110), 22 states have call successors, (22), 13 states have call predecessors, (22), 13 states have return successors, (23), 22 states have call predecessors, (23), 21 states have call successors, (23) [2021-11-20 06:15:31,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 155 transitions. [2021-11-20 06:15:31,086 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 155 transitions. Word has length 109 [2021-11-20 06:15:31,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:15:31,087 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 155 transitions. [2021-11-20 06:15:31,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.0) internal successors, (60), 10 states have internal predecessors, (60), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-20 06:15:31,087 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 155 transitions. [2021-11-20 06:15:31,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-20 06:15:31,089 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:15:31,090 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:15:31,130 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-20 06:15:31,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:15:31,303 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:15:31,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:15:31,303 INFO L85 PathProgramCache]: Analyzing trace with hash 547645211, now seen corresponding path program 2 times [2021-11-20 06:15:31,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:15:31,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [664517386] [2021-11-20 06:15:31,305 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:15:31,305 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:15:31,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:15:31,306 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:15:31,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-20 06:15:35,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:15:35,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:15:35,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 1406 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 06:15:35,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:15:36,257 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 5 proven. 21 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-20 06:15:36,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:15:37,136 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-20 06:15:37,136 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:15:37,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [664517386] [2021-11-20 06:15:37,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [664517386] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:15:37,137 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:15:37,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-11-20 06:15:37,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231544834] [2021-11-20 06:15:37,138 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:15:37,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 06:15:37,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:15:37,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 06:15:37,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2021-11-20 06:15:37,140 INFO L87 Difference]: Start difference. First operand 129 states and 155 transitions. Second operand has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 18 states have internal predecessors, (68), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-20 06:15:38,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:15:38,715 INFO L93 Difference]: Finished difference Result 169 states and 207 transitions. [2021-11-20 06:15:38,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-20 06:15:38,725 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 18 states have internal predecessors, (68), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 113 [2021-11-20 06:15:38,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:15:38,727 INFO L225 Difference]: With dead ends: 169 [2021-11-20 06:15:38,727 INFO L226 Difference]: Without dead ends: 137 [2021-11-20 06:15:38,728 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=223, Invalid=377, Unknown=0, NotChecked=0, Total=600 [2021-11-20 06:15:38,729 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 45 mSDsluCounter, 1010 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 1137 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:15:38,730 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 1137 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 06:15:38,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-11-20 06:15:38,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2021-11-20 06:15:38,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 101 states have (on average 1.1683168316831682) internal successors, (118), 101 states have internal predecessors, (118), 22 states have call successors, (22), 13 states have call predecessors, (22), 13 states have return successors, (23), 22 states have call predecessors, (23), 21 states have call successors, (23) [2021-11-20 06:15:38,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 163 transitions. [2021-11-20 06:15:38,742 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 163 transitions. Word has length 113 [2021-11-20 06:15:38,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:15:38,742 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 163 transitions. [2021-11-20 06:15:38,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 18 states have internal predecessors, (68), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-20 06:15:38,743 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 163 transitions. [2021-11-20 06:15:38,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-20 06:15:38,745 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:15:38,745 INFO L514 BasicCegarLoop]: trace histogram [14, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:15:38,778 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-20 06:15:38,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:15:38,955 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:15:38,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:15:38,956 INFO L85 PathProgramCache]: Analyzing trace with hash -53090405, now seen corresponding path program 3 times [2021-11-20 06:15:38,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:15:38,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1008605919] [2021-11-20 06:15:38,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 06:15:38,958 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:15:38,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:15:38,959 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:15:38,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-20 06:17:20,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-20 06:17:20,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:17:20,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 1446 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-20 06:17:20,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:17:21,380 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 5 proven. 105 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-20 06:17:21,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:17:24,598 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-20 06:17:24,599 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:17:24,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1008605919] [2021-11-20 06:17:24,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1008605919] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:17:24,599 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:17:24,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-11-20 06:17:24,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648174775] [2021-11-20 06:17:24,600 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:17:24,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-20 06:17:24,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:17:24,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-20 06:17:24,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=801, Unknown=0, NotChecked=0, Total=1122 [2021-11-20 06:17:24,603 INFO L87 Difference]: Start difference. First operand 137 states and 163 transitions. Second operand has 34 states, 34 states have (on average 2.4705882352941178) internal successors, (84), 34 states have internal predecessors, (84), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-20 06:17:36,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:17:36,105 INFO L93 Difference]: Finished difference Result 185 states and 231 transitions. [2021-11-20 06:17:36,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-20 06:17:36,107 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.4705882352941178) internal successors, (84), 34 states have internal predecessors, (84), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 121 [2021-11-20 06:17:36,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:17:36,109 INFO L225 Difference]: With dead ends: 185 [2021-11-20 06:17:36,109 INFO L226 Difference]: Without dead ends: 153 [2021-11-20 06:17:36,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=866, Invalid=1584, Unknown=0, NotChecked=0, Total=2450 [2021-11-20 06:17:36,112 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 151 mSDsluCounter, 2234 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 2360 SdHoareTripleChecker+Invalid, 471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:17:36,113 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 2360 Invalid, 471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-20 06:17:36,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-11-20 06:17:36,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2021-11-20 06:17:36,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 117 states have (on average 1.1452991452991452) internal successors, (134), 117 states have internal predecessors, (134), 22 states have call successors, (22), 13 states have call predecessors, (22), 13 states have return successors, (23), 22 states have call predecessors, (23), 21 states have call successors, (23) [2021-11-20 06:17:36,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 179 transitions. [2021-11-20 06:17:36,126 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 179 transitions. Word has length 121 [2021-11-20 06:17:36,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:17:36,127 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 179 transitions. [2021-11-20 06:17:36,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.4705882352941178) internal successors, (84), 34 states have internal predecessors, (84), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-20 06:17:36,127 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 179 transitions. [2021-11-20 06:17:36,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-20 06:17:36,130 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:17:36,130 INFO L514 BasicCegarLoop]: trace histogram [30, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:17:36,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-20 06:17:36,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:17:36,348 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:17:36,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:17:36,348 INFO L85 PathProgramCache]: Analyzing trace with hash 266299547, now seen corresponding path program 4 times [2021-11-20 06:17:36,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:17:36,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [249280750] [2021-11-20 06:17:36,350 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 06:17:36,350 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:17:36,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:17:36,351 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:17:36,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-20 06:17:37,584 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 06:17:37,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:17:37,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 1526 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-20 06:17:37,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:17:39,144 INFO L134 CoverageAnalysis]: Checked inductivity of 513 backedges. 5 proven. 465 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-20 06:17:39,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:17:45,859 INFO L134 CoverageAnalysis]: Checked inductivity of 513 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-20 06:17:45,860 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:17:45,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [249280750] [2021-11-20 06:17:45,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [249280750] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:17:45,860 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:17:45,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 66 [2021-11-20 06:17:45,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953140310] [2021-11-20 06:17:45,861 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:17:45,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-11-20 06:17:45,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:17:45,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-11-20 06:17:45,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=922, Invalid=3368, Unknown=0, NotChecked=0, Total=4290 [2021-11-20 06:17:45,865 INFO L87 Difference]: Start difference. First operand 153 states and 179 transitions. Second operand has 66 states, 66 states have (on average 1.7575757575757576) internal successors, (116), 66 states have internal predecessors, (116), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-20 06:17:54,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:17:54,470 INFO L93 Difference]: Finished difference Result 195 states and 235 transitions. [2021-11-20 06:17:54,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-20 06:17:54,471 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.7575757575757576) internal successors, (116), 66 states have internal predecessors, (116), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 137 [2021-11-20 06:17:54,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:17:54,473 INFO L225 Difference]: With dead ends: 195 [2021-11-20 06:17:54,473 INFO L226 Difference]: Without dead ends: 163 [2021-11-20 06:17:54,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=1318, Invalid=4232, Unknown=0, NotChecked=0, Total=5550 [2021-11-20 06:17:54,476 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 109 mSDsluCounter, 4033 mSDsCounter, 0 mSdLazyCounter, 1024 mSolverCounterSat, 294 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 4160 SdHoareTripleChecker+Invalid, 1318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 294 IncrementalHoareTripleChecker+Valid, 1024 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:17:54,476 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 4160 Invalid, 1318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [294 Valid, 1024 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2021-11-20 06:17:54,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-11-20 06:17:54,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2021-11-20 06:17:54,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 127 states have (on average 1.1338582677165354) internal successors, (144), 127 states have internal predecessors, (144), 22 states have call successors, (22), 13 states have call predecessors, (22), 13 states have return successors, (23), 22 states have call predecessors, (23), 21 states have call successors, (23) [2021-11-20 06:17:54,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 189 transitions. [2021-11-20 06:17:54,490 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 189 transitions. Word has length 137 [2021-11-20 06:17:54,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:17:54,491 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 189 transitions. [2021-11-20 06:17:54,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.7575757575757576) internal successors, (116), 66 states have internal predecessors, (116), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-20 06:17:54,492 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 189 transitions. [2021-11-20 06:17:54,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-20 06:17:54,494 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:17:54,495 INFO L514 BasicCegarLoop]: trace histogram [40, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:17:54,534 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-20 06:17:54,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:17:54,719 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:17:54,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:17:54,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1567692091, now seen corresponding path program 5 times [2021-11-20 06:17:54,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:17:54,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1516965122] [2021-11-20 06:17:54,722 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 06:17:54,722 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:17:54,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:17:54,723 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:17:54,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7069e7-bf2b-40cd-a985-b703942c57e7/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process