./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_write_be64_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_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/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_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_write_be64_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/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_38ba6000-20af-4f71-9640-2a828681920f/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 e695a989d07c92d21e9a41b59ca742c73a2098242f3cafca723523a39a7793cb --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 06:05:03,704 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 06:05:03,707 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 06:05:03,753 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 06:05:03,753 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 06:05:03,755 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 06:05:03,757 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 06:05:03,760 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 06:05:03,763 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 06:05:03,764 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 06:05:03,765 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 06:05:03,767 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 06:05:03,768 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 06:05:03,769 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 06:05:03,771 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 06:05:03,773 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 06:05:03,774 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 06:05:03,775 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 06:05:03,778 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 06:05:03,781 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 06:05:03,783 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 06:05:03,788 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 06:05:03,794 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 06:05:03,795 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 06:05:03,799 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 06:05:03,803 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 06:05:03,804 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 06:05:03,805 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 06:05:03,807 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 06:05:03,808 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 06:05:03,809 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 06:05:03,810 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 06:05:03,812 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 06:05:03,813 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 06:05:03,814 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 06:05:03,815 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 06:05:03,817 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 06:05:03,817 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 06:05:03,817 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 06:05:03,818 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 06:05:03,819 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 06:05:03,820 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-20 06:05:03,870 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 06:05:03,872 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 06:05:03,873 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 06:05:03,873 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 06:05:03,881 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 06:05:03,882 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 06:05:03,883 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 06:05:03,883 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 06:05:03,883 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 06:05:03,883 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 06:05:03,885 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 06:05:03,885 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 06:05:03,885 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 06:05:03,886 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 06:05:03,886 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 06:05:03,886 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 06:05:03,886 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 06:05:03,886 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 06:05:03,887 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 06:05:03,887 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 06:05:03,887 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 06:05:03,887 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:05:03,888 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 06:05:03,888 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 06:05:03,888 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 06:05:03,888 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 06:05:03,889 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 06:05:03,889 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 06:05:03,889 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 06:05:03,891 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 06:05:03,892 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 06:05:03,892 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_38ba6000-20af-4f71-9640-2a828681920f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e695a989d07c92d21e9a41b59ca742c73a2098242f3cafca723523a39a7793cb [2021-11-20 06:05:04,192 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 06:05:04,228 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 06:05:04,231 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 06:05:04,232 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 06:05:04,233 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 06:05:04,234 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/aws-c-common/aws_byte_buf_write_be64_harness.i [2021-11-20 06:05:04,302 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/data/9e18f4807/9af01cef939045e0bfcb508d1aad83c5/FLAGbdde4a24f [2021-11-20 06:05:05,082 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 06:05:05,083 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_be64_harness.i [2021-11-20 06:05:05,129 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/data/9e18f4807/9af01cef939045e0bfcb508d1aad83c5/FLAGbdde4a24f [2021-11-20 06:05:05,615 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/data/9e18f4807/9af01cef939045e0bfcb508d1aad83c5 [2021-11-20 06:05:05,618 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 06:05:05,620 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 06:05:05,621 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 06:05:05,621 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 06:05:05,637 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 06:05:05,637 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:05:05" (1/1) ... [2021-11-20 06:05:05,638 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7385589e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:05:05, skipping insertion in model container [2021-11-20 06:05:05,639 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:05:05" (1/1) ... [2021-11-20 06:05:05,647 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 06:05:05,750 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 06:05:06,052 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_38ba6000-20af-4f71-9640-2a828681920f/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_be64_harness.i[4497,4510] [2021-11-20 06:05:06,059 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_38ba6000-20af-4f71-9640-2a828681920f/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_be64_harness.i[4557,4570] [2021-11-20 06:05:07,073 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:05:07,074 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:05:07,075 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:05:07,076 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:05:07,077 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:05:07,099 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:05:07,100 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:05:07,103 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:05:07,104 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:05:07,613 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-20 06:05:07,614 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-20 06:05:07,615 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-20 06:05:07,617 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-20 06:05:07,619 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-20 06:05:07,620 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-20 06:05:07,620 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-20 06:05:07,621 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-20 06:05:07,622 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-20 06:05:07,623 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-20 06:05:07,842 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-20 06:05:07,989 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:05:07,989 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:05:08,060 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:05:08,112 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 06:05:08,127 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_38ba6000-20af-4f71-9640-2a828681920f/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_be64_harness.i[4497,4510] [2021-11-20 06:05:08,127 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_38ba6000-20af-4f71-9640-2a828681920f/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_be64_harness.i[4557,4570] [2021-11-20 06:05:08,168 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:05:08,169 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:05:08,169 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:05:08,170 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:05:08,186 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:05:08,194 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:05:08,194 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:05:08,195 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:05:08,196 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:05:08,283 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-20 06:05:08,284 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-20 06:05:08,285 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-20 06:05:08,286 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-20 06:05:08,287 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-20 06:05:08,287 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-20 06:05:08,288 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-20 06:05:08,288 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-20 06:05:08,288 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-20 06:05:08,289 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-20 06:05:08,332 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-20 06:05:08,439 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:05:08,442 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:05:08,510 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:05:08,814 INFO L208 MainTranslator]: Completed translation [2021-11-20 06:05:08,814 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:05:08 WrapperNode [2021-11-20 06:05:08,815 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 06:05:08,816 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 06:05:08,816 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 06:05:08,816 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 06:05:08,824 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:05:08" (1/1) ... [2021-11-20 06:05:08,998 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:05:08" (1/1) ... [2021-11-20 06:05:09,115 INFO L137 Inliner]: procedures = 691, calls = 2619, calls flagged for inlining = 62, calls inlined = 9, statements flattened = 861 [2021-11-20 06:05:09,115 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 06:05:09,128 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 06:05:09,128 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 06:05:09,129 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 06:05:09,138 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:05:08" (1/1) ... [2021-11-20 06:05:09,138 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:05:08" (1/1) ... [2021-11-20 06:05:09,148 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:05:08" (1/1) ... [2021-11-20 06:05:09,148 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:05:08" (1/1) ... [2021-11-20 06:05:09,190 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:05:08" (1/1) ... [2021-11-20 06:05:09,195 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:05:08" (1/1) ... [2021-11-20 06:05:09,205 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:05:08" (1/1) ... [2021-11-20 06:05:09,219 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 06:05:09,220 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 06:05:09,220 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 06:05:09,220 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 06:05:09,221 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:05:08" (1/1) ... [2021-11-20 06:05:09,229 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:05:09,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:05:09,253 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 06:05:09,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 06:05:09,305 INFO L130 BoogieDeclarations]: Found specification of procedure htonl [2021-11-20 06:05:09,305 INFO L130 BoogieDeclarations]: Found specification of procedure aws_hton64 [2021-11-20 06:05:09,305 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_hton64 [2021-11-20 06:05:09,306 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_valid [2021-11-20 06:05:09,306 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_valid [2021-11-20 06:05:09,306 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 06:05:09,306 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-11-20 06:05:09,306 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-11-20 06:05:09,306 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 06:05:09,307 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-20 06:05:09,307 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-20 06:05:09,307 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 06:05:09,307 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 06:05:09,307 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-20 06:05:09,307 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy_impl [2021-11-20 06:05:09,308 INFO L138 BoogieDeclarations]: Found implementation of procedure memcpy_impl [2021-11-20 06:05:09,308 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 06:05:09,308 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 06:05:09,308 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-11-20 06:05:09,308 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-11-20 06:05:09,309 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2021-11-20 06:05:09,309 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2021-11-20 06:05:09,309 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-20 06:05:09,309 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-20 06:05:09,309 INFO L130 BoogieDeclarations]: Found specification of procedure my_memcpy [2021-11-20 06:05:09,309 INFO L138 BoogieDeclarations]: Found implementation of procedure my_memcpy [2021-11-20 06:05:09,310 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 06:05:09,310 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-20 06:05:09,310 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_write [2021-11-20 06:05:09,310 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_write [2021-11-20 06:05:09,310 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-20 06:05:09,310 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2021-11-20 06:05:09,311 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2021-11-20 06:05:09,311 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 06:05:09,311 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_big_endian [2021-11-20 06:05:09,311 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_big_endian [2021-11-20 06:05:09,311 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 06:05:09,600 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 06:05:09,606 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 06:05:11,168 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 06:05:11,182 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 06:05:11,183 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-20 06:05:11,185 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:05:11 BoogieIcfgContainer [2021-11-20 06:05:11,185 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 06:05:11,187 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 06:05:11,187 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 06:05:11,190 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 06:05:11,191 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 06:05:05" (1/3) ... [2021-11-20 06:05:11,191 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1448c881 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:05:11, skipping insertion in model container [2021-11-20 06:05:11,192 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:05:08" (2/3) ... [2021-11-20 06:05:11,192 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1448c881 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:05:11, skipping insertion in model container [2021-11-20 06:05:11,192 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:05:11" (3/3) ... [2021-11-20 06:05:11,194 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_byte_buf_write_be64_harness.i [2021-11-20 06:05:11,199 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 06:05:11,200 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 06:05:11,262 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 06:05:11,280 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 06:05:11,282 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 06:05:11,305 INFO L276 IsEmpty]: Start isEmpty. Operand has 142 states, 92 states have (on average 1.2282608695652173) internal successors, (113), 93 states have internal predecessors, (113), 36 states have call successors, (36), 12 states have call predecessors, (36), 12 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2021-11-20 06:05:11,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-20 06:05:11,323 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:05:11,324 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:05:11,325 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:05:11,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:05:11,331 INFO L85 PathProgramCache]: Analyzing trace with hash -598164550, now seen corresponding path program 1 times [2021-11-20 06:05:11,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:05:11,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483993836] [2021-11-20 06:05:11,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:05:11,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:05:11,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:11,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 06:05:11,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:12,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:05:12,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:12,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-20 06:05:12,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:12,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:05:12,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:12,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-20 06:05:12,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:12,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 06:05:12,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:12,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-20 06:05:12,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:12,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-20 06:05:12,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:12,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-20 06:05:12,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:12,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:05:12,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:12,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-11-20 06:05:12,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:12,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-11-20 06:05:12,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:12,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-20 06:05:12,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:12,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-11-20 06:05:12,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:12,273 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-20 06:05:12,273 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:05:12,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483993836] [2021-11-20 06:05:12,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483993836] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:05:12,275 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:05:12,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:05:12,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729938638] [2021-11-20 06:05:12,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:05:12,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:05:12,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:05:12,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:05:12,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:05:12,334 INFO L87 Difference]: Start difference. First operand has 142 states, 92 states have (on average 1.2282608695652173) internal successors, (113), 93 states have internal predecessors, (113), 36 states have call successors, (36), 12 states have call predecessors, (36), 12 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 2 states have internal predecessors, (39), 2 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-20 06:05:12,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:05:12,676 INFO L93 Difference]: Finished difference Result 280 states and 391 transitions. [2021-11-20 06:05:12,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:05:12,678 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 2 states have internal predecessors, (39), 2 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 96 [2021-11-20 06:05:12,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:05:12,691 INFO L225 Difference]: With dead ends: 280 [2021-11-20 06:05:12,691 INFO L226 Difference]: Without dead ends: 137 [2021-11-20 06:05:12,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 36 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 06:05:12,709 INFO L933 BasicCegarLoop]: 166 mSDtfsCounter, 63 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:05:12,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 207 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 06:05:12,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-11-20 06:05:12,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2021-11-20 06:05:12,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 88 states have (on average 1.2045454545454546) internal successors, (106), 89 states have internal predecessors, (106), 36 states have call successors, (36), 12 states have call predecessors, (36), 12 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2021-11-20 06:05:12,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 177 transitions. [2021-11-20 06:05:12,793 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 177 transitions. Word has length 96 [2021-11-20 06:05:12,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:05:12,793 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 177 transitions. [2021-11-20 06:05:12,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 2 states have internal predecessors, (39), 2 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-20 06:05:12,794 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 177 transitions. [2021-11-20 06:05:12,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-20 06:05:12,806 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:05:12,806 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:05:12,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 06:05:12,807 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:05:12,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:05:12,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1705408322, now seen corresponding path program 1 times [2021-11-20 06:05:12,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:05:12,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673172465] [2021-11-20 06:05:12,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:05:12,810 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:05:12,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:13,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 06:05:13,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:13,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:05:13,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:13,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-20 06:05:13,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:13,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:05:13,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:13,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-20 06:05:13,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:13,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 06:05:13,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:13,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-20 06:05:13,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:13,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-20 06:05:13,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:13,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-20 06:05:13,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:13,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:05:13,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:13,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-11-20 06:05:13,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:13,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-11-20 06:05:13,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:13,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-20 06:05:13,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:13,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-11-20 06:05:13,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:13,344 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-11-20 06:05:13,345 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:05:13,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673172465] [2021-11-20 06:05:13,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673172465] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:05:13,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555037150] [2021-11-20 06:05:13,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:05:13,346 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:05:13,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:05:13,351 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:05:13,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 06:05:13,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:13,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 2580 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 06:05:13,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:05:14,249 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-20 06:05:14,249 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:05:14,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555037150] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:05:14,250 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:05:14,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2021-11-20 06:05:14,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896289615] [2021-11-20 06:05:14,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:05:14,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 06:05:14,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:05:14,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 06:05:14,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:05:14,253 INFO L87 Difference]: Start difference. First operand 137 states and 177 transitions. Second operand has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-20 06:05:14,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:05:14,455 INFO L93 Difference]: Finished difference Result 252 states and 333 transitions. [2021-11-20 06:05:14,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 06:05:14,456 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 96 [2021-11-20 06:05:14,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:05:14,467 INFO L225 Difference]: With dead ends: 252 [2021-11-20 06:05:14,467 INFO L226 Difference]: Without dead ends: 140 [2021-11-20 06:05:14,469 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-11-20 06:05:14,471 INFO L933 BasicCegarLoop]: 142 mSDtfsCounter, 205 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:05:14,472 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 391 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:05:14,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-11-20 06:05:14,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2021-11-20 06:05:14,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 90 states have (on average 1.2) internal successors, (108), 92 states have internal predecessors, (108), 36 states have call successors, (36), 12 states have call predecessors, (36), 13 states have return successors, (39), 35 states have call predecessors, (39), 35 states have call successors, (39) [2021-11-20 06:05:14,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 183 transitions. [2021-11-20 06:05:14,515 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 183 transitions. Word has length 96 [2021-11-20 06:05:14,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:05:14,516 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 183 transitions. [2021-11-20 06:05:14,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-20 06:05:14,517 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 183 transitions. [2021-11-20 06:05:14,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-20 06:05:14,520 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:05:14,520 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:05:14,558 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 06:05:14,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-11-20 06:05:14,746 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:05:14,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:05:14,747 INFO L85 PathProgramCache]: Analyzing trace with hash 870874419, now seen corresponding path program 1 times [2021-11-20 06:05:14,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:05:14,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233885684] [2021-11-20 06:05:14,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:05:14,747 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:05:14,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:14,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 06:05:14,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:14,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:05:14,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:14,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-20 06:05:14,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:14,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:05:14,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:14,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-20 06:05:14,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:14,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-20 06:05:14,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:15,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-20 06:05:15,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:15,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-20 06:05:15,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:15,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-11-20 06:05:15,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:15,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:05:15,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:15,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-11-20 06:05:15,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:15,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-20 06:05:15,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:15,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-20 06:05:15,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:15,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-11-20 06:05:15,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:15,167 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-11-20 06:05:15,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:05:15,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233885684] [2021-11-20 06:05:15,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233885684] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:05:15,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302805407] [2021-11-20 06:05:15,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:05:15,171 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:05:15,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:05:15,174 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:05:15,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 06:05:15,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:15,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 2597 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 06:05:15,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:05:15,935 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-20 06:05:15,936 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:05:15,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302805407] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:05:15,936 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:05:15,936 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-20 06:05:15,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231768899] [2021-11-20 06:05:15,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:05:15,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:05:15,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:05:15,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:05:15,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-11-20 06:05:15,940 INFO L87 Difference]: Start difference. First operand 140 states and 183 transitions. Second operand has 7 states, 6 states have (on average 9.333333333333334) internal successors, (56), 7 states have internal predecessors, (56), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-20 06:05:16,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:05:16,132 INFO L93 Difference]: Finished difference Result 247 states and 324 transitions. [2021-11-20 06:05:16,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 06:05:16,133 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 9.333333333333334) internal successors, (56), 7 states have internal predecessors, (56), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 4 states have call successors, (14) Word has length 102 [2021-11-20 06:05:16,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:05:16,138 INFO L225 Difference]: With dead ends: 247 [2021-11-20 06:05:16,138 INFO L226 Difference]: Without dead ends: 140 [2021-11-20 06:05:16,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-20 06:05:16,142 INFO L933 BasicCegarLoop]: 142 mSDtfsCounter, 222 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 518 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:05:16,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 518 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:05:16,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-11-20 06:05:16,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2021-11-20 06:05:16,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 90 states have (on average 1.2) internal successors, (108), 92 states have internal predecessors, (108), 36 states have call successors, (36), 12 states have call predecessors, (36), 13 states have return successors, (38), 35 states have call predecessors, (38), 35 states have call successors, (38) [2021-11-20 06:05:16,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 182 transitions. [2021-11-20 06:05:16,169 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 182 transitions. Word has length 102 [2021-11-20 06:05:16,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:05:16,170 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 182 transitions. [2021-11-20 06:05:16,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 9.333333333333334) internal successors, (56), 7 states have internal predecessors, (56), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-20 06:05:16,171 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 182 transitions. [2021-11-20 06:05:16,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-20 06:05:16,178 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:05:16,178 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:05:16,218 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 06:05:16,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:05:16,390 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:05:16,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:05:16,391 INFO L85 PathProgramCache]: Analyzing trace with hash 1336541160, now seen corresponding path program 2 times [2021-11-20 06:05:16,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:05:16,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690672448] [2021-11-20 06:05:16,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:05:16,391 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:05:16,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:16,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 06:05:16,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:16,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:05:16,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:16,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-20 06:05:16,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:16,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:05:16,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:16,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-20 06:05:16,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:16,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-20 06:05:16,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:16,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-20 06:05:16,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:16,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-11-20 06:05:16,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:16,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-20 06:05:16,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:16,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:05:16,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:16,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-20 06:05:16,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:16,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-20 06:05:16,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:16,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-11-20 06:05:16,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:16,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-11-20 06:05:16,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:16,827 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-20 06:05:16,829 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:05:16,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690672448] [2021-11-20 06:05:16,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690672448] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:05:16,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255946708] [2021-11-20 06:05:16,830 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:05:16,830 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:05:16,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:05:16,831 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:05:16,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 06:05:17,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:05:17,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:05:17,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 2614 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 06:05:17,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:05:17,869 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-20 06:05:17,869 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:05:17,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255946708] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:05:17,869 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:05:17,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 16 [2021-11-20 06:05:17,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87890365] [2021-11-20 06:05:17,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:05:17,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 06:05:17,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:05:17,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 06:05:17,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-11-20 06:05:17,872 INFO L87 Difference]: Start difference. First operand 140 states and 182 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 8 states have internal predecessors, (50), 5 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-20 06:05:18,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:05:18,167 INFO L93 Difference]: Finished difference Result 231 states and 303 transitions. [2021-11-20 06:05:18,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 06:05:18,168 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 8 states have internal predecessors, (50), 5 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) Word has length 108 [2021-11-20 06:05:18,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:05:18,170 INFO L225 Difference]: With dead ends: 231 [2021-11-20 06:05:18,170 INFO L226 Difference]: Without dead ends: 137 [2021-11-20 06:05:18,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-11-20 06:05:18,172 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 228 mSDsluCounter, 597 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 729 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:05:18,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 729 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 06:05:18,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-11-20 06:05:18,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2021-11-20 06:05:18,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 88 states have (on average 1.1931818181818181) internal successors, (105), 89 states have internal predecessors, (105), 36 states have call successors, (36), 12 states have call predecessors, (36), 12 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2021-11-20 06:05:18,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 176 transitions. [2021-11-20 06:05:18,183 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 176 transitions. Word has length 108 [2021-11-20 06:05:18,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:05:18,184 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 176 transitions. [2021-11-20 06:05:18,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 8 states have internal predecessors, (50), 5 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-20 06:05:18,185 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 176 transitions. [2021-11-20 06:05:18,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-20 06:05:18,186 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:05:18,187 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:05:18,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 06:05:18,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:05:18,401 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:05:18,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:05:18,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1211043646, now seen corresponding path program 1 times [2021-11-20 06:05:18,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:05:18,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159517293] [2021-11-20 06:05:18,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:05:18,402 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:05:18,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:18,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 06:05:18,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:18,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:05:18,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:18,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-20 06:05:18,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:18,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:05:18,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:18,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-20 06:05:18,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:18,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-20 06:05:18,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:18,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-20 06:05:18,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:18,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-11-20 06:05:18,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:18,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-20 06:05:18,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:18,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:05:18,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:18,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-20 06:05:18,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:18,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-11-20 06:05:18,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:18,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-20 06:05:18,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:18,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-11-20 06:05:18,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:18,863 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-11-20 06:05:18,864 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:05:18,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159517293] [2021-11-20 06:05:18,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159517293] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:05:18,864 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:05:18,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-20 06:05:18,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863657877] [2021-11-20 06:05:18,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:05:18,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 06:05:18,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:05:18,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 06:05:18,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:05:18,866 INFO L87 Difference]: Start difference. First operand 137 states and 176 transitions. Second operand has 9 states, 8 states have (on average 6.125) internal successors, (49), 6 states have internal predecessors, (49), 2 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) [2021-11-20 06:05:19,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:05:19,422 INFO L93 Difference]: Finished difference Result 149 states and 193 transitions. [2021-11-20 06:05:19,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 06:05:19,423 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.125) internal successors, (49), 6 states have internal predecessors, (49), 2 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) Word has length 120 [2021-11-20 06:05:19,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:05:19,425 INFO L225 Difference]: With dead ends: 149 [2021-11-20 06:05:19,425 INFO L226 Difference]: Without dead ends: 147 [2021-11-20 06:05:19,425 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-11-20 06:05:19,426 INFO L933 BasicCegarLoop]: 156 mSDtfsCounter, 89 mSDsluCounter, 627 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 783 SdHoareTripleChecker+Invalid, 540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:05:19,426 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 783 Invalid, 540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 500 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-20 06:05:19,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-11-20 06:05:19,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 146. [2021-11-20 06:05:19,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 94 states have (on average 1.1808510638297873) internal successors, (111), 96 states have internal predecessors, (111), 37 states have call successors, (37), 13 states have call predecessors, (37), 14 states have return successors, (42), 36 states have call predecessors, (42), 36 states have call successors, (42) [2021-11-20 06:05:19,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 190 transitions. [2021-11-20 06:05:19,437 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 190 transitions. Word has length 120 [2021-11-20 06:05:19,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:05:19,439 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 190 transitions. [2021-11-20 06:05:19,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.125) internal successors, (49), 6 states have internal predecessors, (49), 2 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) [2021-11-20 06:05:19,439 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 190 transitions. [2021-11-20 06:05:19,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-20 06:05:19,441 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:05:19,441 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:05:19,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 06:05:19,442 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:05:19,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:05:19,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1628651524, now seen corresponding path program 1 times [2021-11-20 06:05:19,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:05:19,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708704185] [2021-11-20 06:05:19,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:05:19,443 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:05:19,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:19,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 06:05:19,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:19,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:05:19,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:19,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-20 06:05:19,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:19,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:05:19,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:19,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-20 06:05:19,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:19,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-20 06:05:19,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:19,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-20 06:05:19,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:19,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-11-20 06:05:19,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:19,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-20 06:05:19,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:19,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:05:19,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:19,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-20 06:05:20,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:20,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-11-20 06:05:20,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:20,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-20 06:05:20,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:20,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-11-20 06:05:20,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:20,198 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-11-20 06:05:20,198 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:05:20,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708704185] [2021-11-20 06:05:20,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708704185] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:05:20,199 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:05:20,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-20 06:05:20,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923463395] [2021-11-20 06:05:20,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:05:20,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 06:05:20,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:05:20,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 06:05:20,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-11-20 06:05:20,201 INFO L87 Difference]: Start difference. First operand 146 states and 190 transitions. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 10 states have internal predecessors, (59), 4 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-20 06:05:20,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:05:20,898 INFO L93 Difference]: Finished difference Result 236 states and 320 transitions. [2021-11-20 06:05:20,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 06:05:20,899 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 10 states have internal predecessors, (59), 4 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 124 [2021-11-20 06:05:20,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:05:20,901 INFO L225 Difference]: With dead ends: 236 [2021-11-20 06:05:20,901 INFO L226 Difference]: Without dead ends: 170 [2021-11-20 06:05:20,902 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2021-11-20 06:05:20,903 INFO L933 BasicCegarLoop]: 144 mSDtfsCounter, 193 mSDsluCounter, 475 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 619 SdHoareTripleChecker+Invalid, 563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:05:20,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 619 Invalid, 563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-20 06:05:20,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-11-20 06:05:20,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 164. [2021-11-20 06:05:20,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 109 states have (on average 1.201834862385321) internal successors, (131), 114 states have internal predecessors, (131), 38 states have call successors, (38), 13 states have call predecessors, (38), 16 states have return successors, (56), 36 states have call predecessors, (56), 37 states have call successors, (56) [2021-11-20 06:05:20,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 225 transitions. [2021-11-20 06:05:20,922 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 225 transitions. Word has length 124 [2021-11-20 06:05:20,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:05:20,923 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 225 transitions. [2021-11-20 06:05:20,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 10 states have internal predecessors, (59), 4 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-20 06:05:20,924 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 225 transitions. [2021-11-20 06:05:20,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-20 06:05:20,926 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:05:20,926 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:05:20,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-20 06:05:20,926 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:05:20,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:05:20,927 INFO L85 PathProgramCache]: Analyzing trace with hash 348787846, now seen corresponding path program 1 times [2021-11-20 06:05:20,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:05:20,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128930219] [2021-11-20 06:05:20,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:05:20,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:05:21,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:21,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 06:05:21,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:21,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:05:21,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:21,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-20 06:05:21,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:21,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:05:21,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:21,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-20 06:05:21,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:21,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-20 06:05:21,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:21,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-20 06:05:21,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:21,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-11-20 06:05:21,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:21,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-20 06:05:21,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:21,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:05:21,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:21,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-20 06:05:21,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:21,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-11-20 06:05:21,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:21,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-20 06:05:21,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:21,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-11-20 06:05:21,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:21,491 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-11-20 06:05:21,491 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:05:21,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128930219] [2021-11-20 06:05:21,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128930219] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:05:21,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270180673] [2021-11-20 06:05:21,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:05:21,492 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:05:21,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:05:21,493 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:05:21,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 06:05:21,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:21,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 2650 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-20 06:05:21,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:05:22,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-20 06:05:22,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:05:22,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2021-11-20 06:05:23,115 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-11-20 06:05:23,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-11-20 06:05:23,615 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-20 06:05:23,615 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:05:23,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270180673] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:05:23,616 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:05:23,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [11] total 25 [2021-11-20 06:05:23,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277328430] [2021-11-20 06:05:23,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:05:23,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-20 06:05:23,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:05:23,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-20 06:05:23,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-11-20 06:05:23,619 INFO L87 Difference]: Start difference. First operand 164 states and 225 transitions. Second operand has 16 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 9 states have call successors, (16), 4 states have call predecessors, (16), 5 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2021-11-20 06:05:23,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:05:23,861 INFO L93 Difference]: Finished difference Result 355 states and 494 transitions. [2021-11-20 06:05:23,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-20 06:05:23,861 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 9 states have call successors, (16), 4 states have call predecessors, (16), 5 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) Word has length 124 [2021-11-20 06:05:23,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:05:23,868 INFO L225 Difference]: With dead ends: 355 [2021-11-20 06:05:23,868 INFO L226 Difference]: Without dead ends: 240 [2021-11-20 06:05:23,869 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 129 SyntacticMatches, 10 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2021-11-20 06:05:23,870 INFO L933 BasicCegarLoop]: 218 mSDtfsCounter, 58 mSDsluCounter, 797 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 1015 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:05:23,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 1015 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 130 Invalid, 0 Unknown, 88 Unchecked, 0.2s Time] [2021-11-20 06:05:23,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-11-20 06:05:23,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 206. [2021-11-20 06:05:23,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 139 states have (on average 1.2014388489208634) internal successors, (167), 145 states have internal predecessors, (167), 45 states have call successors, (45), 18 states have call predecessors, (45), 21 states have return successors, (68), 42 states have call predecessors, (68), 44 states have call successors, (68) [2021-11-20 06:05:23,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 280 transitions. [2021-11-20 06:05:23,901 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 280 transitions. Word has length 124 [2021-11-20 06:05:23,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:05:23,902 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 280 transitions. [2021-11-20 06:05:23,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 9 states have call successors, (16), 4 states have call predecessors, (16), 5 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2021-11-20 06:05:23,903 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 280 transitions. [2021-11-20 06:05:23,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-20 06:05:23,905 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:05:23,905 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:05:23,947 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 06:05:24,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:05:24,121 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:05:24,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:05:24,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1249944960, now seen corresponding path program 2 times [2021-11-20 06:05:24,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:05:24,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211897782] [2021-11-20 06:05:24,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:05:24,122 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:05:24,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:24,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 06:05:24,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:24,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:05:24,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:24,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-20 06:05:24,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:24,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:05:24,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:24,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-20 06:05:24,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:24,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-20 06:05:24,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:24,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-20 06:05:24,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:24,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-20 06:05:24,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:24,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-20 06:05:24,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:24,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:05:24,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:24,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-11-20 06:05:24,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:24,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-11-20 06:05:24,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:24,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-11-20 06:05:24,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:24,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-11-20 06:05:24,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:24,535 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 13 proven. 15 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-11-20 06:05:24,536 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:05:24,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211897782] [2021-11-20 06:05:24,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211897782] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:05:24,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228219206] [2021-11-20 06:05:24,536 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:05:24,537 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:05:24,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:05:24,538 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:05:24,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 06:05:25,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:05:25,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:05:25,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 2657 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-20 06:05:25,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:05:26,033 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-20 06:05:26,033 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:05:26,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228219206] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:05:26,033 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:05:26,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 11 [2021-11-20 06:05:26,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101769949] [2021-11-20 06:05:26,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:05:26,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 06:05:26,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:05:26,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 06:05:26,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:05:26,035 INFO L87 Difference]: Start difference. First operand 206 states and 280 transitions. Second operand has 9 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 3 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-20 06:05:26,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:05:26,200 INFO L93 Difference]: Finished difference Result 347 states and 483 transitions. [2021-11-20 06:05:26,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 06:05:26,200 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 3 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 128 [2021-11-20 06:05:26,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:05:26,203 INFO L225 Difference]: With dead ends: 347 [2021-11-20 06:05:26,203 INFO L226 Difference]: Without dead ends: 216 [2021-11-20 06:05:26,204 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 153 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-11-20 06:05:26,205 INFO L933 BasicCegarLoop]: 172 mSDtfsCounter, 12 mSDsluCounter, 1151 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1323 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:05:26,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 1323 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:05:26,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-11-20 06:05:26,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 216. [2021-11-20 06:05:26,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 147 states have (on average 1.1904761904761905) internal successors, (175), 155 states have internal predecessors, (175), 45 states have call successors, (45), 18 states have call predecessors, (45), 23 states have return successors, (81), 42 states have call predecessors, (81), 44 states have call successors, (81) [2021-11-20 06:05:26,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 301 transitions. [2021-11-20 06:05:26,233 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 301 transitions. Word has length 128 [2021-11-20 06:05:26,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:05:26,234 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 301 transitions. [2021-11-20 06:05:26,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 3 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-20 06:05:26,234 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 301 transitions. [2021-11-20 06:05:26,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-20 06:05:26,237 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:05:26,238 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:05:26,282 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 06:05:26,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-20 06:05:26,454 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:05:26,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:05:26,455 INFO L85 PathProgramCache]: Analyzing trace with hash 772434568, now seen corresponding path program 3 times [2021-11-20 06:05:26,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:05:26,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490041945] [2021-11-20 06:05:26,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:05:26,455 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:05:26,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:26,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 06:05:26,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:26,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:05:26,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:26,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-20 06:05:26,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:26,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:05:26,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:26,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-20 06:05:26,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:26,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-20 06:05:26,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:26,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-20 06:05:26,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:26,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-11-20 06:05:26,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:26,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-20 06:05:26,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:26,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:05:26,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:26,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-20 06:05:26,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:26,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-11-20 06:05:26,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:26,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-20 06:05:26,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:26,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-11-20 06:05:26,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:26,739 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-11-20 06:05:26,739 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:05:26,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490041945] [2021-11-20 06:05:26,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490041945] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:05:26,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867153727] [2021-11-20 06:05:26,740 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 06:05:26,740 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:05:26,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:05:26,742 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:05:26,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 06:05:27,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-20 06:05:27,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:05:27,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 2422 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:05:27,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:05:28,223 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-11-20 06:05:28,223 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:05:28,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867153727] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:05:28,223 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:05:28,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2021-11-20 06:05:28,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830066302] [2021-11-20 06:05:28,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:05:28,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:05:28,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:05:28,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:05:28,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:05:28,226 INFO L87 Difference]: Start difference. First operand 216 states and 301 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-20 06:05:28,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:05:28,260 INFO L93 Difference]: Finished difference Result 396 states and 559 transitions. [2021-11-20 06:05:28,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:05:28,260 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 124 [2021-11-20 06:05:28,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:05:28,263 INFO L225 Difference]: With dead ends: 396 [2021-11-20 06:05:28,263 INFO L226 Difference]: Without dead ends: 208 [2021-11-20 06:05:28,264 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 154 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 06:05:28,265 INFO L933 BasicCegarLoop]: 187 mSDtfsCounter, 20 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:05:28,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 520 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:05:28,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-11-20 06:05:28,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 206. [2021-11-20 06:05:28,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 139 states have (on average 1.1870503597122302) internal successors, (165), 145 states have internal predecessors, (165), 45 states have call successors, (45), 18 states have call predecessors, (45), 21 states have return successors, (72), 42 states have call predecessors, (72), 44 states have call successors, (72) [2021-11-20 06:05:28,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 282 transitions. [2021-11-20 06:05:28,285 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 282 transitions. Word has length 124 [2021-11-20 06:05:28,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:05:28,286 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 282 transitions. [2021-11-20 06:05:28,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-20 06:05:28,286 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 282 transitions. [2021-11-20 06:05:28,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-20 06:05:28,288 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:05:28,289 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:05:28,326 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-20 06:05:28,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:05:28,505 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:05:28,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:05:28,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1892680832, now seen corresponding path program 4 times [2021-11-20 06:05:28,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:05:28,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546548585] [2021-11-20 06:05:28,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:05:28,506 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:05:28,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:28,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 06:05:28,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:28,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:05:28,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:28,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-20 06:05:28,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:28,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:05:28,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:28,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-20 06:05:28,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:28,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-20 06:05:28,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:28,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-20 06:05:28,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:28,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-20 06:05:28,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:28,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-20 06:05:28,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:28,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:05:28,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:28,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-11-20 06:05:28,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:28,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-11-20 06:05:28,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:28,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-11-20 06:05:28,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:28,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-11-20 06:05:28,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:28,903 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 6 proven. 22 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-11-20 06:05:28,903 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:05:28,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546548585] [2021-11-20 06:05:28,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546548585] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:05:28,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742414492] [2021-11-20 06:05:28,904 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 06:05:28,904 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:05:28,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:05:28,906 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:05:28,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 06:05:29,377 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 06:05:29,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:05:29,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 2657 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-20 06:05:29,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:05:29,692 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-20 06:05:29,692 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:05:29,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742414492] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:05:29,693 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:05:29,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 11 [2021-11-20 06:05:29,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49439735] [2021-11-20 06:05:29,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:05:29,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 06:05:29,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:05:29,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 06:05:29,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:05:29,695 INFO L87 Difference]: Start difference. First operand 206 states and 282 transitions. Second operand has 9 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 3 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-20 06:05:29,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:05:29,839 INFO L93 Difference]: Finished difference Result 351 states and 482 transitions. [2021-11-20 06:05:29,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 06:05:29,840 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 3 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 128 [2021-11-20 06:05:29,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:05:29,842 INFO L225 Difference]: With dead ends: 351 [2021-11-20 06:05:29,842 INFO L226 Difference]: Without dead ends: 206 [2021-11-20 06:05:29,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 153 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-11-20 06:05:29,844 INFO L933 BasicCegarLoop]: 171 mSDtfsCounter, 12 mSDsluCounter, 1144 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1315 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:05:29,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 1315 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:05:29,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-11-20 06:05:29,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2021-11-20 06:05:29,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 139 states have (on average 1.1870503597122302) internal successors, (165), 145 states have internal predecessors, (165), 45 states have call successors, (45), 18 states have call predecessors, (45), 21 states have return successors, (70), 42 states have call predecessors, (70), 44 states have call successors, (70) [2021-11-20 06:05:29,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 280 transitions. [2021-11-20 06:05:29,861 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 280 transitions. Word has length 128 [2021-11-20 06:05:29,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:05:29,861 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 280 transitions. [2021-11-20 06:05:29,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 3 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-20 06:05:29,862 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 280 transitions. [2021-11-20 06:05:29,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-20 06:05:29,864 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:05:29,864 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:05:29,904 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-20 06:05:30,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:05:30,081 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:05:30,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:05:30,082 INFO L85 PathProgramCache]: Analyzing trace with hash 1869197772, now seen corresponding path program 5 times [2021-11-20 06:05:30,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:05:30,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403820770] [2021-11-20 06:05:30,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:05:30,082 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:05:30,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:30,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 06:05:30,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:30,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:05:30,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:30,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-20 06:05:30,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:30,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:05:30,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:30,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-20 06:05:30,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:30,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-20 06:05:30,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:30,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-20 06:05:30,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:30,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-11-20 06:05:30,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:30,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-20 06:05:30,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:30,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:05:30,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:30,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-20 06:05:30,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:30,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-11-20 06:05:30,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:30,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-11-20 06:05:30,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:30,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-11-20 06:05:30,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:30,464 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 20 proven. 8 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-11-20 06:05:30,464 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:05:30,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403820770] [2021-11-20 06:05:30,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403820770] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:05:30,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692657696] [2021-11-20 06:05:30,465 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 06:05:30,465 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:05:30,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:05:30,466 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:05:30,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-20 06:05:30,587 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:05:30,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:05:30,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-20 06:05:30,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:05:30,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-20 06:05:31,173 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-11-20 06:05:31,173 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:05:31,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692657696] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:05:31,173 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:05:31,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [10] total 19 [2021-11-20 06:05:31,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460456157] [2021-11-20 06:05:31,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:05:31,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 06:05:31,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:05:31,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 06:05:31,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-11-20 06:05:31,176 INFO L87 Difference]: Start difference. First operand 206 states and 280 transitions. Second operand has 11 states, 11 states have (on average 5.818181818181818) internal successors, (64), 9 states have internal predecessors, (64), 4 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-20 06:05:31,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:05:31,296 INFO L93 Difference]: Finished difference Result 361 states and 490 transitions. [2021-11-20 06:05:31,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 06:05:31,297 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.818181818181818) internal successors, (64), 9 states have internal predecessors, (64), 4 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 128 [2021-11-20 06:05:31,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:05:31,299 INFO L225 Difference]: With dead ends: 361 [2021-11-20 06:05:31,299 INFO L226 Difference]: Without dead ends: 179 [2021-11-20 06:05:31,300 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-11-20 06:05:31,301 INFO L933 BasicCegarLoop]: 163 mSDtfsCounter, 46 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 639 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:05:31,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 639 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 33 Unchecked, 0.1s Time] [2021-11-20 06:05:31,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-11-20 06:05:31,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 177. [2021-11-20 06:05:31,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 121 states have (on average 1.1900826446280992) internal successors, (144), 126 states have internal predecessors, (144), 38 states have call successors, (38), 14 states have call predecessors, (38), 17 states have return successors, (57), 36 states have call predecessors, (57), 37 states have call successors, (57) [2021-11-20 06:05:31,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 239 transitions. [2021-11-20 06:05:31,326 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 239 transitions. Word has length 128 [2021-11-20 06:05:31,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:05:31,327 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 239 transitions. [2021-11-20 06:05:31,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.818181818181818) internal successors, (64), 9 states have internal predecessors, (64), 4 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-20 06:05:31,327 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 239 transitions. [2021-11-20 06:05:31,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-20 06:05:31,329 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:05:31,330 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:05:31,388 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-20 06:05:31,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-20 06:05:31,530 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:05:31,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:05:31,531 INFO L85 PathProgramCache]: Analyzing trace with hash 795272891, now seen corresponding path program 1 times [2021-11-20 06:05:31,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:05:31,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354269614] [2021-11-20 06:05:31,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:05:31,531 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:05:31,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:31,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 06:05:31,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:31,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:05:31,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:31,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-20 06:05:31,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:31,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:05:31,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:31,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-20 06:05:31,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:31,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-20 06:05:31,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:31,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-20 06:05:31,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:31,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-20 06:05:31,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:31,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-20 06:05:31,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:31,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:05:31,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:31,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-20 06:05:31,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:31,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-20 06:05:31,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:31,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-11-20 06:05:31,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:31,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-11-20 06:05:31,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:31,815 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2021-11-20 06:05:31,815 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:05:31,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354269614] [2021-11-20 06:05:31,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354269614] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:05:31,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916340922] [2021-11-20 06:05:31,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:05:31,816 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:05:31,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:05:31,817 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:05:31,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-20 06:05:32,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:32,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 2662 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:05:32,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:05:32,496 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-11-20 06:05:32,496 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:05:32,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916340922] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:05:32,497 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:05:32,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2021-11-20 06:05:32,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111595649] [2021-11-20 06:05:32,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:05:32,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:05:32,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:05:32,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:05:32,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:05:32,498 INFO L87 Difference]: Start difference. First operand 177 states and 239 transitions. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-20 06:05:32,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:05:32,530 INFO L93 Difference]: Finished difference Result 332 states and 465 transitions. [2021-11-20 06:05:32,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:05:32,530 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 130 [2021-11-20 06:05:32,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:05:32,532 INFO L225 Difference]: With dead ends: 332 [2021-11-20 06:05:32,532 INFO L226 Difference]: Without dead ends: 187 [2021-11-20 06:05:32,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 159 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 06:05:32,534 INFO L933 BasicCegarLoop]: 173 mSDtfsCounter, 9 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:05:32,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 513 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:05:32,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-11-20 06:05:32,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 181. [2021-11-20 06:05:32,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 125 states have (on average 1.184) internal successors, (148), 130 states have internal predecessors, (148), 38 states have call successors, (38), 14 states have call predecessors, (38), 17 states have return successors, (57), 36 states have call predecessors, (57), 37 states have call successors, (57) [2021-11-20 06:05:32,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 243 transitions. [2021-11-20 06:05:32,548 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 243 transitions. Word has length 130 [2021-11-20 06:05:32,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:05:32,548 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 243 transitions. [2021-11-20 06:05:32,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-20 06:05:32,549 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 243 transitions. [2021-11-20 06:05:32,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-20 06:05:32,551 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:05:32,551 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 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 06:05:32,592 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-20 06:05:32,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:05:32,778 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:05:32,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:05:32,779 INFO L85 PathProgramCache]: Analyzing trace with hash -556112327, now seen corresponding path program 1 times [2021-11-20 06:05:32,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:05:32,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788814393] [2021-11-20 06:05:32,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:05:32,779 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:05:32,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:32,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 06:05:32,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:32,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:05:32,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:33,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-20 06:05:33,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:33,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:05:33,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:33,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-20 06:05:33,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:33,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-20 06:05:33,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:33,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-20 06:05:33,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:33,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-20 06:05:33,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:33,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-20 06:05:33,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:33,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:05:33,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:33,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-20 06:05:33,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:33,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-20 06:05:33,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:33,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-11-20 06:05:33,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:33,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-11-20 06:05:33,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:33,150 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-20 06:05:33,151 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:05:33,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788814393] [2021-11-20 06:05:33,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788814393] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:05:33,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020195853] [2021-11-20 06:05:33,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:05:33,151 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:05:33,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:05:33,158 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:05:33,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-20 06:05:33,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:33,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 2667 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 06:05:33,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:05:33,939 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-11-20 06:05:33,939 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:05:33,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020195853] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:05:33,939 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:05:33,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 8 [2021-11-20 06:05:33,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193298376] [2021-11-20 06:05:33,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:05:33,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:05:33,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:05:33,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:05:33,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:05:33,945 INFO L87 Difference]: Start difference. First operand 181 states and 243 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-20 06:05:34,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:05:34,132 INFO L93 Difference]: Finished difference Result 360 states and 516 transitions. [2021-11-20 06:05:34,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:05:34,133 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 130 [2021-11-20 06:05:34,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:05:34,135 INFO L225 Difference]: With dead ends: 360 [2021-11-20 06:05:34,135 INFO L226 Difference]: Without dead ends: 207 [2021-11-20 06:05:34,136 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 156 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:05:34,137 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 34 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:05:34,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 596 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 84 Invalid, 0 Unknown, 42 Unchecked, 0.2s Time] [2021-11-20 06:05:34,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-11-20 06:05:34,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 189. [2021-11-20 06:05:34,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 133 states have (on average 1.1804511278195489) internal successors, (157), 138 states have internal predecessors, (157), 38 states have call successors, (38), 14 states have call predecessors, (38), 17 states have return successors, (57), 36 states have call predecessors, (57), 37 states have call successors, (57) [2021-11-20 06:05:34,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 252 transitions. [2021-11-20 06:05:34,151 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 252 transitions. Word has length 130 [2021-11-20 06:05:34,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:05:34,152 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 252 transitions. [2021-11-20 06:05:34,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-20 06:05:34,152 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 252 transitions. [2021-11-20 06:05:34,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-20 06:05:34,154 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:05:34,155 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:05:34,196 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-20 06:05:34,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-20 06:05:34,382 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:05:34,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:05:34,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1341384439, now seen corresponding path program 1 times [2021-11-20 06:05:34,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:05:34,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413322533] [2021-11-20 06:05:34,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:05:34,383 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:05:34,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:34,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 06:05:34,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:34,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:05:34,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:34,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-20 06:05:34,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:34,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:05:34,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:34,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-20 06:05:34,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:34,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-20 06:05:34,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:34,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-20 06:05:34,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:34,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-20 06:05:34,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:34,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-20 06:05:34,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:34,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:05:34,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:34,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-20 06:05:34,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:34,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-20 06:05:34,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:34,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-11-20 06:05:34,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:34,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-11-20 06:05:34,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:34,610 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-11-20 06:05:34,610 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:05:34,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413322533] [2021-11-20 06:05:34,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413322533] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:05:34,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259882095] [2021-11-20 06:05:34,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:05:34,611 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:05:34,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:05:34,614 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:05:34,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-20 06:05:35,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:35,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 2664 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:05:35,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:05:35,261 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-20 06:05:35,261 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:05:35,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259882095] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:05:35,262 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:05:35,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2021-11-20 06:05:35,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390696039] [2021-11-20 06:05:35,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:05:35,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:05:35,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:05:35,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:05:35,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:05:35,265 INFO L87 Difference]: Start difference. First operand 189 states and 252 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-20 06:05:35,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:05:35,294 INFO L93 Difference]: Finished difference Result 339 states and 466 transitions. [2021-11-20 06:05:35,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:05:35,294 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 130 [2021-11-20 06:05:35,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:05:35,296 INFO L225 Difference]: With dead ends: 339 [2021-11-20 06:05:35,296 INFO L226 Difference]: Without dead ends: 180 [2021-11-20 06:05:35,298 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 159 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 06:05:35,298 INFO L933 BasicCegarLoop]: 173 mSDtfsCounter, 34 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:05:35,299 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 511 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:05:35,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-11-20 06:05:35,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 173. [2021-11-20 06:05:35,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 118 states have (on average 1.152542372881356) internal successors, (136), 122 states have internal predecessors, (136), 38 states have call successors, (38), 14 states have call predecessors, (38), 16 states have return successors, (51), 36 states have call predecessors, (51), 37 states have call successors, (51) [2021-11-20 06:05:35,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 225 transitions. [2021-11-20 06:05:35,311 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 225 transitions. Word has length 130 [2021-11-20 06:05:35,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:05:35,311 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 225 transitions. [2021-11-20 06:05:35,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-20 06:05:35,312 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 225 transitions. [2021-11-20 06:05:35,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-20 06:05:35,314 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:05:35,314 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:05:35,355 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-20 06:05:35,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-20 06:05:35,537 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:05:35,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:05:35,538 INFO L85 PathProgramCache]: Analyzing trace with hash -565018827, now seen corresponding path program 2 times [2021-11-20 06:05:35,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:05:35,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390824610] [2021-11-20 06:05:35,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:05:35,538 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:05:35,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:35,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 06:05:35,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:35,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:05:35,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:35,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-20 06:05:35,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:35,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:05:35,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:35,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-20 06:05:35,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:35,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-20 06:05:35,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:35,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-20 06:05:35,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:35,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-20 06:05:35,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:35,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-20 06:05:35,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:35,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:05:35,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:35,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-20 06:05:35,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:35,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-20 06:05:35,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:35,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-11-20 06:05:35,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:35,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-11-20 06:05:35,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:35,990 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-20 06:05:35,991 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:05:35,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390824610] [2021-11-20 06:05:35,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390824610] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:05:35,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369040916] [2021-11-20 06:05:35,991 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:05:35,992 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:05:35,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:05:35,993 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:05:36,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-20 06:05:37,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:05:37,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:05:37,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 2659 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-20 06:05:37,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:05:37,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-20 06:05:37,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:05:37,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2021-11-20 06:05:38,086 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 102 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-20 06:05:38,086 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:05:38,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369040916] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:05:38,086 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:05:38,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [11] total 22 [2021-11-20 06:05:38,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006466791] [2021-11-20 06:05:38,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:05:38,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-20 06:05:38,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:05:38,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-20 06:05:38,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-11-20 06:05:38,088 INFO L87 Difference]: Start difference. First operand 173 states and 225 transitions. Second operand has 13 states, 12 states have (on average 6.916666666666667) internal successors, (83), 12 states have internal predecessors, (83), 6 states have call successors, (16), 3 states have call predecessors, (16), 5 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2021-11-20 06:05:38,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:05:38,312 INFO L93 Difference]: Finished difference Result 396 states and 519 transitions. [2021-11-20 06:05:38,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 06:05:38,313 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 6.916666666666667) internal successors, (83), 12 states have internal predecessors, (83), 6 states have call successors, (16), 3 states have call predecessors, (16), 5 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) Word has length 130 [2021-11-20 06:05:38,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:05:38,315 INFO L225 Difference]: With dead ends: 396 [2021-11-20 06:05:38,315 INFO L226 Difference]: Without dead ends: 233 [2021-11-20 06:05:38,320 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 144 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-11-20 06:05:38,321 INFO L933 BasicCegarLoop]: 180 mSDtfsCounter, 49 mSDsluCounter, 907 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 1087 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:05:38,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 1087 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 97 Invalid, 0 Unknown, 88 Unchecked, 0.2s Time] [2021-11-20 06:05:38,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-11-20 06:05:38,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 196. [2021-11-20 06:05:38,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 137 states have (on average 1.145985401459854) internal successors, (157), 142 states have internal predecessors, (157), 40 states have call successors, (40), 15 states have call predecessors, (40), 18 states have return successors, (55), 38 states have call predecessors, (55), 39 states have call successors, (55) [2021-11-20 06:05:38,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 252 transitions. [2021-11-20 06:05:38,339 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 252 transitions. Word has length 130 [2021-11-20 06:05:38,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:05:38,340 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 252 transitions. [2021-11-20 06:05:38,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 6.916666666666667) internal successors, (83), 12 states have internal predecessors, (83), 6 states have call successors, (16), 3 states have call predecessors, (16), 5 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2021-11-20 06:05:38,341 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 252 transitions. [2021-11-20 06:05:38,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-20 06:05:38,343 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:05:38,343 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:05:38,382 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-20 06:05:38,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-20 06:05:38,568 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:05:38,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:05:38,568 INFO L85 PathProgramCache]: Analyzing trace with hash -593519117, now seen corresponding path program 1 times [2021-11-20 06:05:38,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:05:38,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463117243] [2021-11-20 06:05:38,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:05:38,569 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:05:38,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:38,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 06:05:38,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:38,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:05:38,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:38,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-20 06:05:38,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:38,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:05:38,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:38,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-20 06:05:38,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:38,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-20 06:05:38,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:38,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-20 06:05:38,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:38,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-20 06:05:38,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:38,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-20 06:05:38,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:38,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:05:38,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:38,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-20 06:05:38,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:39,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-20 06:05:39,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:39,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-11-20 06:05:39,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:39,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-11-20 06:05:39,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:39,098 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-20 06:05:39,098 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:05:39,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463117243] [2021-11-20 06:05:39,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463117243] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:05:39,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718701594] [2021-11-20 06:05:39,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:05:39,100 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:05:39,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:05:39,101 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:05:39,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-20 06:05:39,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:39,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 2664 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-20 06:05:39,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:05:39,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-20 06:05:39,769 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 19 treesize of output 1 [2021-11-20 06:05:40,497 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 33 treesize of output 25 [2021-11-20 06:05:40,501 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 14 [2021-11-20 06:05:40,686 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-20 06:05:40,686 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:05:40,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718701594] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:05:40,686 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:05:40,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [11] total 24 [2021-11-20 06:05:40,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581133459] [2021-11-20 06:05:40,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:05:40,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-20 06:05:40,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:05:40,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-20 06:05:40,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-11-20 06:05:40,689 INFO L87 Difference]: Start difference. First operand 196 states and 252 transitions. Second operand has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 11 states have internal predecessors, (73), 6 states have call successors, (16), 4 states have call predecessors, (16), 5 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2021-11-20 06:05:40,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:05:40,905 INFO L93 Difference]: Finished difference Result 407 states and 532 transitions. [2021-11-20 06:05:40,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-20 06:05:40,905 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 11 states have internal predecessors, (73), 6 states have call successors, (16), 4 states have call predecessors, (16), 5 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) Word has length 130 [2021-11-20 06:05:40,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:05:40,908 INFO L225 Difference]: With dead ends: 407 [2021-11-20 06:05:40,908 INFO L226 Difference]: Without dead ends: 268 [2021-11-20 06:05:40,909 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 144 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2021-11-20 06:05:40,910 INFO L933 BasicCegarLoop]: 222 mSDtfsCounter, 55 mSDsluCounter, 808 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 1030 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:05:40,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 1030 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 92 Invalid, 0 Unknown, 92 Unchecked, 0.2s Time] [2021-11-20 06:05:40,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-11-20 06:05:40,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 234. [2021-11-20 06:05:40,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 167 states have (on average 1.125748502994012) internal successors, (188), 172 states have internal predecessors, (188), 44 states have call successors, (44), 19 states have call predecessors, (44), 22 states have return successors, (60), 42 states have call predecessors, (60), 43 states have call successors, (60) [2021-11-20 06:05:40,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 292 transitions. [2021-11-20 06:05:40,927 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 292 transitions. Word has length 130 [2021-11-20 06:05:40,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:05:40,928 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 292 transitions. [2021-11-20 06:05:40,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 11 states have internal predecessors, (73), 6 states have call successors, (16), 4 states have call predecessors, (16), 5 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2021-11-20 06:05:40,928 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 292 transitions. [2021-11-20 06:05:40,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-20 06:05:40,930 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:05:40,931 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:05:40,967 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-20 06:05:41,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-20 06:05:41,146 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:05:41,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:05:41,147 INFO L85 PathProgramCache]: Analyzing trace with hash -516292465, now seen corresponding path program 1 times [2021-11-20 06:05:41,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:05:41,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433314225] [2021-11-20 06:05:41,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:05:41,147 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:05:41,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:41,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 06:05:41,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:41,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:05:41,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:41,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-20 06:05:41,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:41,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-20 06:05:41,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:41,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:05:41,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:41,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-20 06:05:41,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:41,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-20 06:05:41,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:41,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-11-20 06:05:41,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:41,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-11-20 06:05:41,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:41,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-11-20 06:05:41,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:41,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:05:41,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:41,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-11-20 06:05:41,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:41,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-11-20 06:05:41,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:41,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-11-20 06:05:41,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:41,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-11-20 06:05:41,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:41,564 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-20 06:05:41,564 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:05:41,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433314225] [2021-11-20 06:05:41,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433314225] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:05:41,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235464982] [2021-11-20 06:05:41,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:05:41,566 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:05:41,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:05:41,570 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:05:41,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-20 06:05:42,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:42,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 2677 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-20 06:05:42,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:05:42,314 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 19 treesize of output 1 [2021-11-20 06:05:42,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-20 06:05:43,033 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 33 treesize of output 25 [2021-11-20 06:05:43,048 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 14 [2021-11-20 06:05:43,233 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-20 06:05:43,234 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:05:43,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235464982] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:05:43,234 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:05:43,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [11] total 24 [2021-11-20 06:05:43,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174679390] [2021-11-20 06:05:43,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:05:43,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-20 06:05:43,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:05:43,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-20 06:05:43,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-11-20 06:05:43,237 INFO L87 Difference]: Start difference. First operand 234 states and 292 transitions. Second operand has 15 states, 15 states have (on average 5.066666666666666) internal successors, (76), 11 states have internal predecessors, (76), 6 states have call successors, (17), 4 states have call predecessors, (17), 5 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2021-11-20 06:05:43,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:05:43,802 INFO L93 Difference]: Finished difference Result 432 states and 557 transitions. [2021-11-20 06:05:43,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-20 06:05:43,803 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.066666666666666) internal successors, (76), 11 states have internal predecessors, (76), 6 states have call successors, (17), 4 states have call predecessors, (17), 5 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) Word has length 135 [2021-11-20 06:05:43,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:05:43,805 INFO L225 Difference]: With dead ends: 432 [2021-11-20 06:05:43,805 INFO L226 Difference]: Without dead ends: 293 [2021-11-20 06:05:43,806 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 152 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2021-11-20 06:05:43,807 INFO L933 BasicCegarLoop]: 181 mSDtfsCounter, 208 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 711 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 189 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:05:43,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 711 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 407 Invalid, 0 Unknown, 189 Unchecked, 0.4s Time] [2021-11-20 06:05:43,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-11-20 06:05:43,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 228. [2021-11-20 06:05:43,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 163 states have (on average 1.1226993865030674) internal successors, (183), 169 states have internal predecessors, (183), 42 states have call successors, (42), 19 states have call predecessors, (42), 22 states have return successors, (57), 39 states have call predecessors, (57), 41 states have call successors, (57) [2021-11-20 06:05:43,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 282 transitions. [2021-11-20 06:05:43,824 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 282 transitions. Word has length 135 [2021-11-20 06:05:43,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:05:43,825 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 282 transitions. [2021-11-20 06:05:43,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.066666666666666) internal successors, (76), 11 states have internal predecessors, (76), 6 states have call successors, (17), 4 states have call predecessors, (17), 5 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2021-11-20 06:05:43,825 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 282 transitions. [2021-11-20 06:05:43,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-20 06:05:43,827 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:05:43,828 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:05:43,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-20 06:05:44,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:05:44,054 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:05:44,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:05:44,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1477119212, now seen corresponding path program 1 times [2021-11-20 06:05:44,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:05:44,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092983878] [2021-11-20 06:05:44,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:05:44,055 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:05:44,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:44,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 06:05:44,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:44,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:05:44,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:44,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-20 06:05:44,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:44,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:05:44,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:44,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-20 06:05:44,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:44,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-20 06:05:44,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:44,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-20 06:05:44,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:44,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-20 06:05:44,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:44,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-11-20 06:05:44,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:44,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-20 06:05:44,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:44,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:05:44,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:44,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-11-20 06:05:44,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:44,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-11-20 06:05:44,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:44,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-11-20 06:05:44,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:44,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-11-20 06:05:44,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:44,588 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-11-20 06:05:44,588 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:05:44,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092983878] [2021-11-20 06:05:44,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092983878] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:05:44,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70733009] [2021-11-20 06:05:44,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:05:44,589 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:05:44,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:05:44,594 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:05:44,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-20 06:05:45,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:45,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 2680 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-20 06:05:45,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:05:45,133 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 19 treesize of output 1 [2021-11-20 06:05:45,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-11-20 06:05:45,583 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-11-20 06:05:45,584 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:05:45,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70733009] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:05:45,584 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:05:45,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11] total 17 [2021-11-20 06:05:45,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390481341] [2021-11-20 06:05:45,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:05:45,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 06:05:45,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:05:45,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 06:05:45,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-11-20 06:05:45,586 INFO L87 Difference]: Start difference. First operand 228 states and 282 transitions. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 9 states have internal predecessors, (75), 5 states have call successors, (17), 3 states have call predecessors, (17), 4 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-11-20 06:05:46,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:05:46,071 INFO L93 Difference]: Finished difference Result 407 states and 531 transitions. [2021-11-20 06:05:46,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 06:05:46,072 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 9 states have internal predecessors, (75), 5 states have call successors, (17), 3 states have call predecessors, (17), 4 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 137 [2021-11-20 06:05:46,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:05:46,074 INFO L225 Difference]: With dead ends: 407 [2021-11-20 06:05:46,074 INFO L226 Difference]: Without dead ends: 265 [2021-11-20 06:05:46,076 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 160 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-11-20 06:05:46,076 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 123 mSDsluCounter, 985 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 1181 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:05:46,077 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 1181 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 323 Invalid, 0 Unknown, 62 Unchecked, 0.3s Time] [2021-11-20 06:05:46,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-11-20 06:05:46,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 234. [2021-11-20 06:05:46,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 168 states have (on average 1.1130952380952381) internal successors, (187), 175 states have internal predecessors, (187), 42 states have call successors, (42), 19 states have call predecessors, (42), 23 states have return successors, (63), 39 states have call predecessors, (63), 41 states have call successors, (63) [2021-11-20 06:05:46,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 292 transitions. [2021-11-20 06:05:46,094 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 292 transitions. Word has length 137 [2021-11-20 06:05:46,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:05:46,094 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 292 transitions. [2021-11-20 06:05:46,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 9 states have internal predecessors, (75), 5 states have call successors, (17), 3 states have call predecessors, (17), 4 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-11-20 06:05:46,095 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 292 transitions. [2021-11-20 06:05:46,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-20 06:05:46,097 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:05:46,097 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:05:46,146 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-20 06:05:46,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-20 06:05:46,322 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:05:46,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:05:46,322 INFO L85 PathProgramCache]: Analyzing trace with hash -1173322332, now seen corresponding path program 3 times [2021-11-20 06:05:46,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:05:46,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396287668] [2021-11-20 06:05:46,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:05:46,323 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:05:46,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:46,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 06:05:46,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:46,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:05:46,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:46,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-20 06:05:46,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:46,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:05:46,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:46,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-20 06:05:46,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:46,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-20 06:05:46,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:46,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-20 06:05:46,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:46,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-20 06:05:46,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:46,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-20 06:05:46,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:46,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:05:46,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:46,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-11-20 06:05:46,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:46,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-11-20 06:05:46,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:46,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-11-20 06:05:46,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:46,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-11-20 06:05:46,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:46,778 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-11-20 06:05:46,779 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:05:46,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396287668] [2021-11-20 06:05:46,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396287668] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:05:46,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215643957] [2021-11-20 06:05:46,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 06:05:46,780 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:05:46,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:05:46,781 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:05:46,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-20 06:05:48,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-20 06:05:48,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:05:48,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 2427 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-20 06:05:48,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:05:49,068 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 87 proven. 6 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-20 06:05:49,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:05:49,609 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-11-20 06:05:49,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 25 [2021-11-20 06:05:49,792 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 48 proven. 10 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-20 06:05:49,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215643957] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:05:49,792 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:05:49,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 25 [2021-11-20 06:05:49,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033664510] [2021-11-20 06:05:49,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:05:49,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-20 06:05:49,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:05:49,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-20 06:05:49,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2021-11-20 06:05:49,795 INFO L87 Difference]: Start difference. First operand 234 states and 292 transitions. Second operand has 25 states, 24 states have (on average 4.541666666666667) internal successors, (109), 23 states have internal predecessors, (109), 5 states have call successors, (27), 5 states have call predecessors, (27), 5 states have return successors, (21), 4 states have call predecessors, (21), 5 states have call successors, (21) [2021-11-20 06:05:51,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:05:51,960 INFO L93 Difference]: Finished difference Result 403 states and 519 transitions. [2021-11-20 06:05:51,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-20 06:05:51,961 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 4.541666666666667) internal successors, (109), 23 states have internal predecessors, (109), 5 states have call successors, (27), 5 states have call predecessors, (27), 5 states have return successors, (21), 4 states have call predecessors, (21), 5 states have call successors, (21) Word has length 136 [2021-11-20 06:05:51,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:05:51,963 INFO L225 Difference]: With dead ends: 403 [2021-11-20 06:05:51,963 INFO L226 Difference]: Without dead ends: 278 [2021-11-20 06:05:51,965 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 284 SyntacticMatches, 10 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=368, Invalid=1794, Unknown=0, NotChecked=0, Total=2162 [2021-11-20 06:05:51,966 INFO L933 BasicCegarLoop]: 175 mSDtfsCounter, 237 mSDsluCounter, 1233 mSDsCounter, 0 mSdLazyCounter, 1499 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 1408 SdHoareTripleChecker+Invalid, 2024 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 1499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 390 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:05:51,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 1408 Invalid, 2024 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 1499 Invalid, 0 Unknown, 390 Unchecked, 1.2s Time] [2021-11-20 06:05:51,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-11-20 06:05:51,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 257. [2021-11-20 06:05:51,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 186 states have (on average 1.1129032258064515) internal successors, (207), 193 states have internal predecessors, (207), 45 states have call successors, (45), 21 states have call predecessors, (45), 25 states have return successors, (75), 42 states have call predecessors, (75), 44 states have call successors, (75) [2021-11-20 06:05:51,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 327 transitions. [2021-11-20 06:05:51,986 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 327 transitions. Word has length 136 [2021-11-20 06:05:51,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:05:51,987 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 327 transitions. [2021-11-20 06:05:51,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 4.541666666666667) internal successors, (109), 23 states have internal predecessors, (109), 5 states have call successors, (27), 5 states have call predecessors, (27), 5 states have return successors, (21), 4 states have call predecessors, (21), 5 states have call successors, (21) [2021-11-20 06:05:51,987 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 327 transitions. [2021-11-20 06:05:51,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-20 06:05:51,989 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:05:51,990 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:05:52,028 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-20 06:05:52,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:05:52,209 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:05:52,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:05:52,209 INFO L85 PathProgramCache]: Analyzing trace with hash 325396064, now seen corresponding path program 1 times [2021-11-20 06:05:52,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:05:52,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765002884] [2021-11-20 06:05:52,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:05:52,210 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:05:52,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:52,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 06:05:52,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:52,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:05:52,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:52,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-20 06:05:52,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:52,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:05:52,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:52,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-20 06:05:52,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:52,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-20 06:05:52,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:52,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-20 06:05:52,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:52,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-20 06:05:52,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:52,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-20 06:05:52,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:52,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:05:52,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:52,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-11-20 06:05:52,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:52,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-11-20 06:05:52,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:52,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-11-20 06:05:52,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:52,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-11-20 06:05:52,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:52,662 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2021-11-20 06:05:52,662 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:05:52,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765002884] [2021-11-20 06:05:52,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765002884] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:05:52,662 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:05:52,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 06:05:52,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842457840] [2021-11-20 06:05:52,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:05:52,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:05:52,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:05:52,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:05:52,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:05:52,665 INFO L87 Difference]: Start difference. First operand 257 states and 327 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, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-20 06:05:52,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:05:52,950 INFO L93 Difference]: Finished difference Result 413 states and 540 transitions. [2021-11-20 06:05:52,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:05:52,951 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, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) Word has length 136 [2021-11-20 06:05:52,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:05:52,954 INFO L225 Difference]: With dead ends: 413 [2021-11-20 06:05:52,954 INFO L226 Difference]: Without dead ends: 257 [2021-11-20 06:05:52,955 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:05:52,956 INFO L933 BasicCegarLoop]: 157 mSDtfsCounter, 62 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:05:52,957 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 384 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 06:05:52,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-11-20 06:05:52,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 257. [2021-11-20 06:05:52,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 186 states have (on average 1.10752688172043) internal successors, (206), 193 states have internal predecessors, (206), 45 states have call successors, (45), 21 states have call predecessors, (45), 25 states have return successors, (75), 42 states have call predecessors, (75), 44 states have call successors, (75) [2021-11-20 06:05:52,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 326 transitions. [2021-11-20 06:05:52,980 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 326 transitions. Word has length 136 [2021-11-20 06:05:52,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:05:52,980 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 326 transitions. [2021-11-20 06:05:52,981 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, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-20 06:05:52,981 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 326 transitions. [2021-11-20 06:05:52,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-20 06:05:52,982 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:05:52,983 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:05:52,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-20 06:05:52,983 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:05:52,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:05:52,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1094566079, now seen corresponding path program 1 times [2021-11-20 06:05:52,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:05:52,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296102984] [2021-11-20 06:05:52,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:05:52,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:05:53,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:53,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 06:05:53,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:53,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:05:53,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:53,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-20 06:05:53,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:53,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:05:53,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:53,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-20 06:05:53,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:53,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-20 06:05:53,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:53,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-20 06:05:53,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:53,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-20 06:05:53,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:53,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-20 06:05:53,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:53,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:05:53,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:53,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-11-20 06:05:53,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:53,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-11-20 06:05:53,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:53,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-11-20 06:05:53,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:53,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-11-20 06:05:53,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:53,805 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-11-20 06:05:53,806 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:05:53,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296102984] [2021-11-20 06:05:53,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296102984] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:05:53,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57081897] [2021-11-20 06:05:53,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:05:53,807 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:05:53,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:05:53,808 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:05:53,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-20 06:05:54,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:54,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 2681 conjuncts, 73 conjunts are in the unsatisfiable core [2021-11-20 06:05:54,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:05:54,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-20 06:05:58,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:05:58,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2021-11-20 06:06:05,493 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-11-20 06:06:05,493 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 52 treesize of output 51 [2021-11-20 06:06:05,508 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-11-20 06:06:05,508 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 41 treesize of output 29 [2021-11-20 06:06:08,406 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 123 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 06:06:08,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:06:10,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57081897] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:06:10,374 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:06:10,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 23] total 38 [2021-11-20 06:06:10,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273673688] [2021-11-20 06:06:10,374 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:06:10,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-20 06:06:10,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:06:10,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-20 06:06:10,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=2043, Unknown=3, NotChecked=0, Total=2256 [2021-11-20 06:06:10,378 INFO L87 Difference]: Start difference. First operand 257 states and 326 transitions. Second operand has 38 states, 33 states have (on average 4.606060606060606) internal successors, (152), 33 states have internal predecessors, (152), 17 states have call successors, (31), 7 states have call predecessors, (31), 9 states have return successors, (28), 14 states have call predecessors, (28), 15 states have call successors, (28) [2021-11-20 06:06:13,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:06:13,111 INFO L93 Difference]: Finished difference Result 588 states and 817 transitions. [2021-11-20 06:06:13,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-20 06:06:13,112 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 33 states have (on average 4.606060606060606) internal successors, (152), 33 states have internal predecessors, (152), 17 states have call successors, (31), 7 states have call predecessors, (31), 9 states have return successors, (28), 14 states have call predecessors, (28), 15 states have call successors, (28) Word has length 136 [2021-11-20 06:06:13,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:06:13,116 INFO L225 Difference]: With dead ends: 588 [2021-11-20 06:06:13,116 INFO L226 Difference]: Without dead ends: 443 [2021-11-20 06:06:13,119 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 187 SyntacticMatches, 8 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1907 ImplicationChecksByTransitivity, 16.1s TimeCoverageRelationStatistics Valid=586, Invalid=5417, Unknown=3, NotChecked=0, Total=6006 [2021-11-20 06:06:13,122 INFO L933 BasicCegarLoop]: 239 mSDtfsCounter, 305 mSDsluCounter, 1881 mSDsCounter, 0 mSdLazyCounter, 2164 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 2120 SdHoareTripleChecker+Invalid, 3562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 2164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1186 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-20 06:06:13,122 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [353 Valid, 2120 Invalid, 3562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 2164 Invalid, 0 Unknown, 1186 Unchecked, 1.6s Time] [2021-11-20 06:06:13,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2021-11-20 06:06:13,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 347. [2021-11-20 06:06:13,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 245 states have (on average 1.1346938775510205) internal successors, (278), 254 states have internal predecessors, (278), 70 states have call successors, (70), 27 states have call predecessors, (70), 31 states have return successors, (129), 65 states have call predecessors, (129), 69 states have call successors, (129) [2021-11-20 06:06:13,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 477 transitions. [2021-11-20 06:06:13,167 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 477 transitions. Word has length 136 [2021-11-20 06:06:13,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:06:13,168 INFO L470 AbstractCegarLoop]: Abstraction has 347 states and 477 transitions. [2021-11-20 06:06:13,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 33 states have (on average 4.606060606060606) internal successors, (152), 33 states have internal predecessors, (152), 17 states have call successors, (31), 7 states have call predecessors, (31), 9 states have return successors, (28), 14 states have call predecessors, (28), 15 states have call successors, (28) [2021-11-20 06:06:13,168 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 477 transitions. [2021-11-20 06:06:13,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-20 06:06:13,171 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:06:13,171 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:06:13,210 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-20 06:06:13,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:06:13,386 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:06:13,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:06:13,387 INFO L85 PathProgramCache]: Analyzing trace with hash 481081225, now seen corresponding path program 1 times [2021-11-20 06:06:13,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:06:13,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790079019] [2021-11-20 06:06:13,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:06:13,387 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:06:13,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:14,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 06:06:14,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:14,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:06:14,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:14,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-20 06:06:14,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:14,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:06:14,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:14,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-20 06:06:14,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:14,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-20 06:06:14,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:14,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-20 06:06:14,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:14,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-20 06:06:14,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:14,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-11-20 06:06:14,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:14,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-20 06:06:14,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:14,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:06:14,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:14,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-11-20 06:06:14,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:14,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-11-20 06:06:14,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:14,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-11-20 06:06:14,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:14,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-11-20 06:06:14,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:14,701 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 43 proven. 9 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-11-20 06:06:14,701 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:06:14,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790079019] [2021-11-20 06:06:14,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790079019] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:06:14,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71134006] [2021-11-20 06:06:14,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:06:14,702 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:06:14,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:06:14,706 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:06:14,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-20 06:06:15,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:15,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 2698 conjuncts, 88 conjunts are in the unsatisfiable core [2021-11-20 06:06:15,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:06:15,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-20 06:06:15,378 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 06:06:15,799 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-20 06:06:15,799 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 23 [2021-11-20 06:06:15,820 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-20 06:06:15,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-11-20 06:06:15,974 INFO L354 Elim1Store]: treesize reduction 33, result has 34.0 percent of original size [2021-11-20 06:06:15,974 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 78 treesize of output 70 [2021-11-20 06:06:15,993 INFO L354 Elim1Store]: treesize reduction 33, result has 34.0 percent of original size [2021-11-20 06:06:15,993 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 70 treesize of output 62 [2021-11-20 06:06:16,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-20 06:06:16,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-20 06:06:16,699 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-11-20 06:06:16,700 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 52 treesize of output 40 [2021-11-20 06:06:16,709 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-11-20 06:06:16,710 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 37 treesize of output 25 [2021-11-20 06:06:17,958 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 62 proven. 67 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-20 06:06:17,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:06:21,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71134006] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:06:21,429 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:06:21,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23] total 45 [2021-11-20 06:06:21,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59623669] [2021-11-20 06:06:21,429 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:06:21,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-11-20 06:06:21,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:06:21,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-11-20 06:06:21,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=2593, Unknown=2, NotChecked=0, Total=2756 [2021-11-20 06:06:21,432 INFO L87 Difference]: Start difference. First operand 347 states and 477 transitions. Second operand has 45 states, 41 states have (on average 3.7804878048780486) internal successors, (155), 39 states have internal predecessors, (155), 19 states have call successors, (33), 7 states have call predecessors, (33), 9 states have return successors, (30), 17 states have call predecessors, (30), 16 states have call successors, (30) [2021-11-20 06:06:26,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:06:26,158 INFO L93 Difference]: Finished difference Result 555 states and 771 transitions. [2021-11-20 06:06:26,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-20 06:06:26,160 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 41 states have (on average 3.7804878048780486) internal successors, (155), 39 states have internal predecessors, (155), 19 states have call successors, (33), 7 states have call predecessors, (33), 9 states have return successors, (30), 17 states have call predecessors, (30), 16 states have call successors, (30) Word has length 137 [2021-11-20 06:06:26,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:06:26,164 INFO L225 Difference]: With dead ends: 555 [2021-11-20 06:06:26,165 INFO L226 Difference]: Without dead ends: 389 [2021-11-20 06:06:26,168 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 182 SyntacticMatches, 13 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2380 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=563, Invalid=7807, Unknown=2, NotChecked=0, Total=8372 [2021-11-20 06:06:26,169 INFO L933 BasicCegarLoop]: 183 mSDtfsCounter, 269 mSDsluCounter, 2169 mSDsCounter, 0 mSdLazyCounter, 3494 mSolverCounterSat, 264 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 2352 SdHoareTripleChecker+Invalid, 4557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 264 IncrementalHoareTripleChecker+Valid, 3494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 799 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-20 06:06:26,169 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [298 Valid, 2352 Invalid, 4557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [264 Valid, 3494 Invalid, 0 Unknown, 799 Unchecked, 2.7s Time] [2021-11-20 06:06:26,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-11-20 06:06:26,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 357. [2021-11-20 06:06:26,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 252 states have (on average 1.1349206349206349) internal successors, (286), 262 states have internal predecessors, (286), 71 states have call successors, (71), 27 states have call predecessors, (71), 33 states have return successors, (127), 67 states have call predecessors, (127), 70 states have call successors, (127) [2021-11-20 06:06:26,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 484 transitions. [2021-11-20 06:06:26,202 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 484 transitions. Word has length 137 [2021-11-20 06:06:26,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:06:26,202 INFO L470 AbstractCegarLoop]: Abstraction has 357 states and 484 transitions. [2021-11-20 06:06:26,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 41 states have (on average 3.7804878048780486) internal successors, (155), 39 states have internal predecessors, (155), 19 states have call successors, (33), 7 states have call predecessors, (33), 9 states have return successors, (30), 17 states have call predecessors, (30), 16 states have call successors, (30) [2021-11-20 06:06:26,203 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 484 transitions. [2021-11-20 06:06:26,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-11-20 06:06:26,206 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:06:26,206 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:06:26,242 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-20 06:06:26,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:06:26,434 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:06:26,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:06:26,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1774102651, now seen corresponding path program 1 times [2021-11-20 06:06:26,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:06:26,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358812486] [2021-11-20 06:06:26,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:06:26,435 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:06:26,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:26,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 06:06:26,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:26,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:06:26,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:26,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-20 06:06:26,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:26,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:06:26,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:26,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-20 06:06:26,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:26,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-20 06:06:26,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:26,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-20 06:06:26,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:26,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-20 06:06:26,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:26,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-20 06:06:26,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:26,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:06:26,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:26,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-11-20 06:06:26,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:26,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-11-20 06:06:26,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:26,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-11-20 06:06:26,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:26,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-11-20 06:06:26,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:26,820 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 22 proven. 8 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2021-11-20 06:06:26,820 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:06:26,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358812486] [2021-11-20 06:06:26,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358812486] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:06:26,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807904898] [2021-11-20 06:06:26,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:06:26,821 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:06:26,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:06:26,822 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:06:26,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-20 06:06:27,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:27,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 2688 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-20 06:06:27,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:06:27,507 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-11-20 06:06:27,508 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:06:27,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807904898] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:06:27,508 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:06:27,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 11 [2021-11-20 06:06:27,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397595639] [2021-11-20 06:06:27,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:06:27,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 06:06:27,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:06:27,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 06:06:27,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:06:27,510 INFO L87 Difference]: Start difference. First operand 357 states and 484 transitions. Second operand has 9 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 3 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-20 06:06:27,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:06:27,636 INFO L93 Difference]: Finished difference Result 537 states and 747 transitions. [2021-11-20 06:06:27,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 06:06:27,642 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 3 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 140 [2021-11-20 06:06:27,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:06:27,646 INFO L225 Difference]: With dead ends: 537 [2021-11-20 06:06:27,646 INFO L226 Difference]: Without dead ends: 328 [2021-11-20 06:06:27,648 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 166 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-11-20 06:06:27,649 INFO L933 BasicCegarLoop]: 168 mSDtfsCounter, 12 mSDsluCounter, 1125 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1293 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:06:27,649 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 1293 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:06:27,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2021-11-20 06:06:27,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 321. [2021-11-20 06:06:27,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 224 states have (on average 1.1205357142857142) internal successors, (251), 234 states have internal predecessors, (251), 65 states have call successors, (65), 25 states have call predecessors, (65), 31 states have return successors, (99), 61 states have call predecessors, (99), 64 states have call successors, (99) [2021-11-20 06:06:27,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 415 transitions. [2021-11-20 06:06:27,677 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 415 transitions. Word has length 140 [2021-11-20 06:06:27,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:06:27,677 INFO L470 AbstractCegarLoop]: Abstraction has 321 states and 415 transitions. [2021-11-20 06:06:27,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 3 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-20 06:06:27,678 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 415 transitions. [2021-11-20 06:06:27,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-20 06:06:27,680 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:06:27,680 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:06:27,717 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-20 06:06:27,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-20 06:06:27,902 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:06:27,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:06:27,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1679989516, now seen corresponding path program 1 times [2021-11-20 06:06:27,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:06:27,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276224674] [2021-11-20 06:06:27,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:06:27,903 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:06:27,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:28,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 06:06:28,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:28,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:06:28,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:28,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-20 06:06:28,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:28,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:06:28,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:28,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-20 06:06:28,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:28,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-20 06:06:28,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:28,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-20 06:06:28,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:28,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-20 06:06:28,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:28,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-20 06:06:28,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:28,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:06:28,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:28,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-11-20 06:06:28,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:28,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-11-20 06:06:28,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:28,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-11-20 06:06:28,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:28,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-11-20 06:06:28,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:28,342 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 32 proven. 14 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-11-20 06:06:28,343 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:06:28,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276224674] [2021-11-20 06:06:28,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276224674] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:06:28,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59633395] [2021-11-20 06:06:28,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:06:28,344 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:06:28,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:06:28,345 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:06:28,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-20 06:06:28,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:28,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 2680 conjuncts, 82 conjunts are in the unsatisfiable core [2021-11-20 06:06:28,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:06:28,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-20 06:06:29,219 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-20 06:06:29,220 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 31 treesize of output 30 [2021-11-20 06:06:29,422 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-20 06:06:29,422 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 33 treesize of output 32 [2021-11-20 06:06:30,288 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 69 proven. 44 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-20 06:06:30,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:06:31,092 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 60 proven. 14 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-20 06:06:31,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59633395] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:06:31,092 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:06:31,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18, 10] total 32 [2021-11-20 06:06:31,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008997355] [2021-11-20 06:06:31,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:06:31,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-20 06:06:31,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:06:31,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-20 06:06:31,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2021-11-20 06:06:31,094 INFO L87 Difference]: Start difference. First operand 321 states and 415 transitions. Second operand has 32 states, 29 states have (on average 4.827586206896552) internal successors, (140), 29 states have internal predecessors, (140), 12 states have call successors, (37), 6 states have call predecessors, (37), 5 states have return successors, (30), 9 states have call predecessors, (30), 11 states have call successors, (30) [2021-11-20 06:06:34,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:06:34,660 INFO L93 Difference]: Finished difference Result 551 states and 746 transitions. [2021-11-20 06:06:34,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-20 06:06:34,660 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 29 states have (on average 4.827586206896552) internal successors, (140), 29 states have internal predecessors, (140), 12 states have call successors, (37), 6 states have call predecessors, (37), 5 states have return successors, (30), 9 states have call predecessors, (30), 11 states have call successors, (30) Word has length 142 [2021-11-20 06:06:34,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:06:34,664 INFO L225 Difference]: With dead ends: 551 [2021-11-20 06:06:34,664 INFO L226 Difference]: Without dead ends: 414 [2021-11-20 06:06:34,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 291 SyntacticMatches, 9 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1105 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=508, Invalid=3914, Unknown=0, NotChecked=0, Total=4422 [2021-11-20 06:06:34,668 INFO L933 BasicCegarLoop]: 213 mSDtfsCounter, 377 mSDsluCounter, 2264 mSDsCounter, 0 mSdLazyCounter, 3143 mSolverCounterSat, 224 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 2477 SdHoareTripleChecker+Invalid, 3811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 224 IncrementalHoareTripleChecker+Valid, 3143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 444 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:06:34,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [388 Valid, 2477 Invalid, 3811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [224 Valid, 3143 Invalid, 0 Unknown, 444 Unchecked, 2.3s Time] [2021-11-20 06:06:34,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-11-20 06:06:34,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 349. [2021-11-20 06:06:34,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 245 states have (on average 1.1142857142857143) internal successors, (273), 254 states have internal predecessors, (273), 70 states have call successors, (70), 27 states have call predecessors, (70), 33 states have return successors, (111), 67 states have call predecessors, (111), 69 states have call successors, (111) [2021-11-20 06:06:34,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 454 transitions. [2021-11-20 06:06:34,702 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 454 transitions. Word has length 142 [2021-11-20 06:06:34,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:06:34,702 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 454 transitions. [2021-11-20 06:06:34,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 29 states have (on average 4.827586206896552) internal successors, (140), 29 states have internal predecessors, (140), 12 states have call successors, (37), 6 states have call predecessors, (37), 5 states have return successors, (30), 9 states have call predecessors, (30), 11 states have call successors, (30) [2021-11-20 06:06:34,703 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 454 transitions. [2021-11-20 06:06:34,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-20 06:06:34,705 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:06:34,706 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:06:34,745 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-11-20 06:06:34,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-20 06:06:34,930 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:06:34,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:06:34,930 INFO L85 PathProgramCache]: Analyzing trace with hash -181271120, now seen corresponding path program 2 times [2021-11-20 06:06:34,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:06:34,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060855324] [2021-11-20 06:06:34,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:06:34,931 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:06:35,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:35,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 06:06:35,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:35,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:06:35,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:35,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-20 06:06:35,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:35,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:06:35,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:35,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-20 06:06:35,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:35,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-20 06:06:35,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:35,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-20 06:06:35,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:36,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-20 06:06:36,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:36,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-20 06:06:36,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:36,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:06:36,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:36,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-11-20 06:06:36,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:36,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-11-20 06:06:36,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:36,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-11-20 06:06:36,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:36,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-11-20 06:06:36,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:36,359 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 44 proven. 29 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-20 06:06:36,359 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:06:36,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060855324] [2021-11-20 06:06:36,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060855324] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:06:36,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642925640] [2021-11-20 06:06:36,359 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:06:36,359 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:06:36,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:06:36,360 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:06:36,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-20 06:06:37,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:06:37,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:06:37,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 2690 conjuncts, 75 conjunts are in the unsatisfiable core [2021-11-20 06:06:37,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:06:37,430 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 19 treesize of output 1 [2021-11-20 06:06:37,477 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 06:06:45,904 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-11-20 06:06:45,905 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 31 treesize of output 34 [2021-11-20 06:06:58,956 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 92 proven. 26 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-20 06:06:58,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:06:59,789 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 60 proven. 14 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-20 06:06:59,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642925640] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:06:59,790 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:06:59,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 9] total 41 [2021-11-20 06:06:59,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998742210] [2021-11-20 06:06:59,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:06:59,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-20 06:06:59,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:06:59,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-20 06:06:59,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1492, Unknown=2, NotChecked=0, Total=1640 [2021-11-20 06:06:59,792 INFO L87 Difference]: Start difference. First operand 349 states and 454 transitions. Second operand has 41 states, 37 states have (on average 4.783783783783784) internal successors, (177), 37 states have internal predecessors, (177), 16 states have call successors, (45), 6 states have call predecessors, (45), 8 states have return successors, (40), 13 states have call predecessors, (40), 15 states have call successors, (40) [2021-11-20 06:07:02,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:07:02,285 INFO L93 Difference]: Finished difference Result 476 states and 620 transitions. [2021-11-20 06:07:02,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-20 06:07:02,286 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 37 states have (on average 4.783783783783784) internal successors, (177), 37 states have internal predecessors, (177), 16 states have call successors, (45), 6 states have call predecessors, (45), 8 states have return successors, (40), 13 states have call predecessors, (40), 15 states have call successors, (40) Word has length 142 [2021-11-20 06:07:02,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:07:02,289 INFO L225 Difference]: With dead ends: 476 [2021-11-20 06:07:02,289 INFO L226 Difference]: Without dead ends: 359 [2021-11-20 06:07:02,292 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 288 SyntacticMatches, 11 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1083 ImplicationChecksByTransitivity, 22.5s TimeCoverageRelationStatistics Valid=455, Invalid=3575, Unknown=2, NotChecked=0, Total=4032 [2021-11-20 06:07:02,292 INFO L933 BasicCegarLoop]: 144 mSDtfsCounter, 268 mSDsluCounter, 1201 mSDsCounter, 0 mSdLazyCounter, 2228 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 1345 SdHoareTripleChecker+Invalid, 2646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 2228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 305 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-20 06:07:02,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 1345 Invalid, 2646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 2228 Invalid, 0 Unknown, 305 Unchecked, 1.6s Time] [2021-11-20 06:07:02,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-11-20 06:07:02,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 303. [2021-11-20 06:07:02,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 216 states have (on average 1.0972222222222223) internal successors, (237), 221 states have internal predecessors, (237), 56 states have call successors, (56), 26 states have call predecessors, (56), 30 states have return successors, (74), 55 states have call predecessors, (74), 55 states have call successors, (74) [2021-11-20 06:07:02,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 367 transitions. [2021-11-20 06:07:02,321 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 367 transitions. Word has length 142 [2021-11-20 06:07:02,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:07:02,321 INFO L470 AbstractCegarLoop]: Abstraction has 303 states and 367 transitions. [2021-11-20 06:07:02,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 37 states have (on average 4.783783783783784) internal successors, (177), 37 states have internal predecessors, (177), 16 states have call successors, (45), 6 states have call predecessors, (45), 8 states have return successors, (40), 13 states have call predecessors, (40), 15 states have call successors, (40) [2021-11-20 06:07:02,322 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 367 transitions. [2021-11-20 06:07:02,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-20 06:07:02,323 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:07:02,324 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:07:02,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-20 06:07:02,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-20 06:07:02,550 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:07:02,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:07:02,551 INFO L85 PathProgramCache]: Analyzing trace with hash 987319158, now seen corresponding path program 1 times [2021-11-20 06:07:02,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:07:02,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432966596] [2021-11-20 06:07:02,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:07:02,551 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:07:02,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:02,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 06:07:02,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:02,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:07:02,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:02,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-20 06:07:02,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:02,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:07:02,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:02,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-20 06:07:02,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:02,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-20 06:07:02,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:02,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-20 06:07:02,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:02,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-20 06:07:02,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:02,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-20 06:07:02,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:02,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:07:02,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:02,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-11-20 06:07:02,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:03,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-11-20 06:07:03,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:03,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-11-20 06:07:03,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:03,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-11-20 06:07:03,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:03,122 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 60 proven. 7 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2021-11-20 06:07:03,122 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:07:03,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432966596] [2021-11-20 06:07:03,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432966596] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:07:03,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486730908] [2021-11-20 06:07:03,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:07:03,122 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:07:03,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:07:03,126 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:07:03,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-20 06:07:03,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:03,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 2687 conjuncts, 107 conjunts are in the unsatisfiable core [2021-11-20 06:07:03,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:07:03,768 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 19 treesize of output 1 [2021-11-20 06:07:03,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-20 06:07:04,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2021-11-20 06:07:04,557 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-11-20 06:07:04,557 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 28 [2021-11-20 06:07:04,752 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-11-20 06:07:04,753 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 31 treesize of output 38 [2021-11-20 06:07:06,099 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 55 proven. 92 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 06:07:06,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:07:07,268 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 60 proven. 14 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-20 06:07:07,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486730908] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:07:07,269 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:07:07,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 31, 12] total 50 [2021-11-20 06:07:07,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887023020] [2021-11-20 06:07:07,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:07:07,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-20 06:07:07,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:07:07,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-20 06:07:07,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=2236, Unknown=0, NotChecked=0, Total=2450 [2021-11-20 06:07:07,272 INFO L87 Difference]: Start difference. First operand 303 states and 367 transitions. Second operand has 50 states, 48 states have (on average 3.6875) internal successors, (177), 45 states have internal predecessors, (177), 13 states have call successors, (36), 8 states have call predecessors, (36), 11 states have return successors, (31), 11 states have call predecessors, (31), 11 states have call successors, (31) [2021-11-20 06:07:11,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:07:11,205 INFO L93 Difference]: Finished difference Result 558 states and 698 transitions. [2021-11-20 06:07:11,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-11-20 06:07:11,205 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 48 states have (on average 3.6875) internal successors, (177), 45 states have internal predecessors, (177), 13 states have call successors, (36), 8 states have call predecessors, (36), 11 states have return successors, (31), 11 states have call predecessors, (31), 11 states have call successors, (31) Word has length 142 [2021-11-20 06:07:11,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:07:11,209 INFO L225 Difference]: With dead ends: 558 [2021-11-20 06:07:11,209 INFO L226 Difference]: Without dead ends: 467 [2021-11-20 06:07:11,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 282 SyntacticMatches, 6 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2391 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=594, Invalid=7062, Unknown=0, NotChecked=0, Total=7656 [2021-11-20 06:07:11,213 INFO L933 BasicCegarLoop]: 190 mSDtfsCounter, 309 mSDsluCounter, 1960 mSDsCounter, 0 mSdLazyCounter, 3202 mSolverCounterSat, 300 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 2150 SdHoareTripleChecker+Invalid, 4340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 300 IncrementalHoareTripleChecker+Valid, 3202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 838 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:07:11,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [328 Valid, 2150 Invalid, 4340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [300 Valid, 3202 Invalid, 0 Unknown, 838 Unchecked, 2.5s Time] [2021-11-20 06:07:11,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2021-11-20 06:07:11,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 422. [2021-11-20 06:07:11,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 290 states have (on average 1.103448275862069) internal successors, (320), 295 states have internal predecessors, (320), 90 states have call successors, (90), 38 states have call predecessors, (90), 41 states have return successors, (117), 88 states have call predecessors, (117), 88 states have call successors, (117) [2021-11-20 06:07:11,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 527 transitions. [2021-11-20 06:07:11,255 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 527 transitions. Word has length 142 [2021-11-20 06:07:11,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:07:11,256 INFO L470 AbstractCegarLoop]: Abstraction has 422 states and 527 transitions. [2021-11-20 06:07:11,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 48 states have (on average 3.6875) internal successors, (177), 45 states have internal predecessors, (177), 13 states have call successors, (36), 8 states have call predecessors, (36), 11 states have return successors, (31), 11 states have call predecessors, (31), 11 states have call successors, (31) [2021-11-20 06:07:11,256 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 527 transitions. [2021-11-20 06:07:11,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-20 06:07:11,258 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:07:11,258 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:07:11,291 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-20 06:07:11,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:07:11,474 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:07:11,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:07:11,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1192111162, now seen corresponding path program 1 times [2021-11-20 06:07:11,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:07:11,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122031674] [2021-11-20 06:07:11,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:07:11,475 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:07:11,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:11,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 06:07:11,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:11,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:07:11,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:11,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-20 06:07:11,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:11,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:07:11,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:11,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-20 06:07:11,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:12,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-20 06:07:12,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:12,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-20 06:07:12,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:12,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-20 06:07:12,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:12,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-20 06:07:12,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:12,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:07:12,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:12,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-11-20 06:07:12,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:12,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-11-20 06:07:12,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:12,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-11-20 06:07:12,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:12,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-11-20 06:07:12,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:12,261 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-11-20 06:07:12,261 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:07:12,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122031674] [2021-11-20 06:07:12,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122031674] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:07:12,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84885522] [2021-11-20 06:07:12,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:07:12,263 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:07:12,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:07:12,268 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:07:12,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-20 06:07:12,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:12,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 2687 conjuncts, 105 conjunts are in the unsatisfiable core [2021-11-20 06:07:12,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:07:12,847 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 19 treesize of output 1 [2021-11-20 06:07:13,144 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-20 06:07:13,144 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 31 treesize of output 30 [2021-11-20 06:07:13,319 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-20 06:07:13,319 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 33 treesize of output 32 [2021-11-20 06:07:21,088 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 82 proven. 48 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-20 06:07:21,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:07:22,285 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 60 proven. 14 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-20 06:07:22,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84885522] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:07:22,285 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:07:22,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 24, 12] total 50 [2021-11-20 06:07:22,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134848177] [2021-11-20 06:07:22,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:07:22,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-20 06:07:22,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:07:22,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-20 06:07:22,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=2274, Unknown=1, NotChecked=0, Total=2450 [2021-11-20 06:07:22,290 INFO L87 Difference]: Start difference. First operand 422 states and 527 transitions. Second operand has 50 states, 46 states have (on average 3.717391304347826) internal successors, (171), 46 states have internal predecessors, (171), 18 states have call successors, (44), 7 states have call predecessors, (44), 9 states have return successors, (39), 15 states have call predecessors, (39), 16 states have call successors, (39) [2021-11-20 06:07:29,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:07:29,750 INFO L93 Difference]: Finished difference Result 668 states and 841 transitions. [2021-11-20 06:07:29,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-11-20 06:07:29,750 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 46 states have (on average 3.717391304347826) internal successors, (171), 46 states have internal predecessors, (171), 18 states have call successors, (44), 7 states have call predecessors, (44), 9 states have return successors, (39), 15 states have call predecessors, (39), 16 states have call successors, (39) Word has length 142 [2021-11-20 06:07:29,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:07:29,756 INFO L225 Difference]: With dead ends: 668 [2021-11-20 06:07:29,756 INFO L226 Difference]: Without dead ends: 432 [2021-11-20 06:07:29,760 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 286 SyntacticMatches, 10 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2770 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=961, Invalid=9138, Unknown=1, NotChecked=0, Total=10100 [2021-11-20 06:07:29,761 INFO L933 BasicCegarLoop]: 187 mSDtfsCounter, 537 mSDsluCounter, 2251 mSDsCounter, 0 mSdLazyCounter, 5587 mSolverCounterSat, 444 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 545 SdHoareTripleChecker+Valid, 2438 SdHoareTripleChecker+Invalid, 7017 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 444 IncrementalHoareTripleChecker+Valid, 5587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 986 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:07:29,761 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [545 Valid, 2438 Invalid, 7017 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [444 Valid, 5587 Invalid, 0 Unknown, 986 Unchecked, 4.5s Time] [2021-11-20 06:07:29,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2021-11-20 06:07:29,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 363. [2021-11-20 06:07:29,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 262 states have (on average 1.083969465648855) internal successors, (284), 264 states have internal predecessors, (284), 66 states have call successors, (66), 34 states have call predecessors, (66), 34 states have return successors, (75), 64 states have call predecessors, (75), 64 states have call successors, (75) [2021-11-20 06:07:29,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 425 transitions. [2021-11-20 06:07:29,798 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 425 transitions. Word has length 142 [2021-11-20 06:07:29,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:07:29,798 INFO L470 AbstractCegarLoop]: Abstraction has 363 states and 425 transitions. [2021-11-20 06:07:29,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 46 states have (on average 3.717391304347826) internal successors, (171), 46 states have internal predecessors, (171), 18 states have call successors, (44), 7 states have call predecessors, (44), 9 states have return successors, (39), 15 states have call predecessors, (39), 16 states have call successors, (39) [2021-11-20 06:07:29,799 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 425 transitions. [2021-11-20 06:07:29,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-20 06:07:29,800 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:07:29,801 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:07:29,834 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-20 06:07:30,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-20 06:07:30,018 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:07:30,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:07:30,019 INFO L85 PathProgramCache]: Analyzing trace with hash 1185688539, now seen corresponding path program 1 times [2021-11-20 06:07:30,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:07:30,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991249982] [2021-11-20 06:07:30,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:07:30,019 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:07:30,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:30,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 06:07:30,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:30,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:07:30,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:30,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-20 06:07:30,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:30,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:07:30,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:30,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-20 06:07:30,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:30,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-20 06:07:30,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:30,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-20 06:07:30,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:30,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-20 06:07:30,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:30,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-20 06:07:30,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:30,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:07:30,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:30,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-11-20 06:07:30,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:30,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-11-20 06:07:30,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:30,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-11-20 06:07:30,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:30,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-11-20 06:07:30,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:30,315 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-11-20 06:07:30,315 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:07:30,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991249982] [2021-11-20 06:07:30,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991249982] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:07:30,316 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:07:30,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-20 06:07:30,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895356236] [2021-11-20 06:07:30,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:07:30,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 06:07:30,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:07:30,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 06:07:30,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:07:30,318 INFO L87 Difference]: Start difference. First operand 363 states and 425 transitions. Second operand has 11 states, 10 states have (on average 5.7) internal successors, (57), 8 states have internal predecessors, (57), 2 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) [2021-11-20 06:07:30,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:07:30,957 INFO L93 Difference]: Finished difference Result 375 states and 440 transitions. [2021-11-20 06:07:30,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 06:07:30,957 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 5.7) internal successors, (57), 8 states have internal predecessors, (57), 2 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) Word has length 144 [2021-11-20 06:07:30,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:07:30,960 INFO L225 Difference]: With dead ends: 375 [2021-11-20 06:07:30,960 INFO L226 Difference]: Without dead ends: 373 [2021-11-20 06:07:30,961 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-11-20 06:07:30,961 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 95 mSDsluCounter, 818 mSDsCounter, 0 mSdLazyCounter, 654 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 971 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:07:30,962 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 971 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 654 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-20 06:07:30,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2021-11-20 06:07:30,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 368. [2021-11-20 06:07:30,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 265 states have (on average 1.0830188679245283) internal successors, (287), 267 states have internal predecessors, (287), 67 states have call successors, (67), 35 states have call predecessors, (67), 35 states have return successors, (76), 65 states have call predecessors, (76), 65 states have call successors, (76) [2021-11-20 06:07:31,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 430 transitions. [2021-11-20 06:07:31,003 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 430 transitions. Word has length 144 [2021-11-20 06:07:31,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:07:31,007 INFO L470 AbstractCegarLoop]: Abstraction has 368 states and 430 transitions. [2021-11-20 06:07:31,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 5.7) internal successors, (57), 8 states have internal predecessors, (57), 2 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) [2021-11-20 06:07:31,007 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 430 transitions. [2021-11-20 06:07:31,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-20 06:07:31,014 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:07:31,014 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:07:31,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-11-20 06:07:31,014 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:07:31,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:07:31,015 INFO L85 PathProgramCache]: Analyzing trace with hash -687982950, now seen corresponding path program 1 times [2021-11-20 06:07:31,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:07:31,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160914908] [2021-11-20 06:07:31,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:07:31,015 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:07:31,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:31,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 06:07:31,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:31,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:07:31,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:31,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-20 06:07:31,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:31,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:07:31,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:31,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-20 06:07:31,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:31,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-20 06:07:31,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:31,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-20 06:07:31,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:31,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-20 06:07:31,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:31,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-20 06:07:31,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:31,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-20 06:07:31,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:31,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:07:31,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:31,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-11-20 06:07:31,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:31,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-11-20 06:07:31,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:31,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-11-20 06:07:31,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:31,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2021-11-20 06:07:31,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:31,730 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 16 proven. 32 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2021-11-20 06:07:31,730 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:07:31,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160914908] [2021-11-20 06:07:31,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160914908] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:07:31,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605592206] [2021-11-20 06:07:31,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:07:31,731 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:07:31,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:07:31,738 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:07:31,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-20 06:07:32,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:32,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 2723 conjuncts, 116 conjunts are in the unsatisfiable core [2021-11-20 06:07:32,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:07:32,297 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 06:07:32,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-20 06:07:32,621 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-20 06:07:32,621 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 23 [2021-11-20 06:07:32,641 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-20 06:07:32,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-11-20 06:07:32,756 INFO L354 Elim1Store]: treesize reduction 33, result has 34.0 percent of original size [2021-11-20 06:07:32,756 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 78 treesize of output 70 [2021-11-20 06:07:32,772 INFO L354 Elim1Store]: treesize reduction 33, result has 34.0 percent of original size [2021-11-20 06:07:32,773 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 70 treesize of output 62 [2021-11-20 06:07:32,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-20 06:07:32,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-20 06:07:33,074 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 31 treesize of output 15 [2021-11-20 06:07:33,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-20 06:07:39,055 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 06:07:39,056 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 57 treesize of output 53 [2021-11-20 06:07:39,063 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 06:07:39,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 49 [2021-11-20 06:07:39,230 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 78 proven. 85 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-20 06:07:39,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:07:41,741 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 79 proven. 19 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-11-20 06:07:41,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605592206] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:07:41,741 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:07:41,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 38, 21] total 72 [2021-11-20 06:07:41,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102319078] [2021-11-20 06:07:41,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:07:41,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2021-11-20 06:07:41,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:07:41,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-11-20 06:07:41,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=4896, Unknown=1, NotChecked=0, Total=5112 [2021-11-20 06:07:41,744 INFO L87 Difference]: Start difference. First operand 368 states and 430 transitions. Second operand has 72 states, 64 states have (on average 3.28125) internal successors, (210), 60 states have internal predecessors, (210), 21 states have call successors, (49), 9 states have call predecessors, (49), 13 states have return successors, (42), 20 states have call predecessors, (42), 18 states have call successors, (42) [2021-11-20 06:07:52,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:07:52,089 INFO L93 Difference]: Finished difference Result 601 states and 746 transitions. [2021-11-20 06:07:52,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-11-20 06:07:52,090 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 64 states have (on average 3.28125) internal successors, (210), 60 states have internal predecessors, (210), 21 states have call successors, (49), 9 states have call predecessors, (49), 13 states have return successors, (42), 20 states have call predecessors, (42), 18 states have call successors, (42) Word has length 151 [2021-11-20 06:07:52,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:07:52,093 INFO L225 Difference]: With dead ends: 601 [2021-11-20 06:07:52,093 INFO L226 Difference]: Without dead ends: 488 [2021-11-20 06:07:52,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 442 GetRequests, 291 SyntacticMatches, 6 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4935 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=1022, Invalid=20438, Unknown=2, NotChecked=0, Total=21462 [2021-11-20 06:07:52,097 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 430 mSDsluCounter, 3523 mSDsCounter, 0 mSdLazyCounter, 6450 mSolverCounterSat, 503 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 437 SdHoareTripleChecker+Valid, 3654 SdHoareTripleChecker+Invalid, 8083 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 503 IncrementalHoareTripleChecker+Valid, 6450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1130 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:07:52,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [437 Valid, 3654 Invalid, 8083 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [503 Valid, 6450 Invalid, 0 Unknown, 1130 Unchecked, 4.1s Time] [2021-11-20 06:07:52,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2021-11-20 06:07:52,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 416. [2021-11-20 06:07:52,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 299 states have (on average 1.080267558528428) internal successors, (323), 300 states have internal predecessors, (323), 77 states have call successors, (77), 39 states have call predecessors, (77), 39 states have return successors, (88), 76 states have call predecessors, (88), 75 states have call successors, (88) [2021-11-20 06:07:52,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 488 transitions. [2021-11-20 06:07:52,140 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 488 transitions. Word has length 151 [2021-11-20 06:07:52,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:07:52,141 INFO L470 AbstractCegarLoop]: Abstraction has 416 states and 488 transitions. [2021-11-20 06:07:52,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 64 states have (on average 3.28125) internal successors, (210), 60 states have internal predecessors, (210), 21 states have call successors, (49), 9 states have call predecessors, (49), 13 states have return successors, (42), 20 states have call predecessors, (42), 18 states have call successors, (42) [2021-11-20 06:07:52,141 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 488 transitions. [2021-11-20 06:07:52,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-11-20 06:07:52,143 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:07:52,143 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:07:52,184 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-20 06:07:52,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-20 06:07:52,358 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:07:52,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:07:52,359 INFO L85 PathProgramCache]: Analyzing trace with hash 201357244, now seen corresponding path program 1 times [2021-11-20 06:07:52,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:07:52,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336347620] [2021-11-20 06:07:52,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:07:52,359 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:07:52,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:52,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 06:07:52,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:52,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:07:52,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:52,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-20 06:07:52,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:52,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:07:52,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:52,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-20 06:07:52,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:52,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-20 06:07:52,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:52,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-20 06:07:52,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:52,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-20 06:07:52,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:52,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-20 06:07:52,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:52,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:07:52,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:52,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-11-20 06:07:52,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:52,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:07:52,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:52,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-20 06:07:52,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:52,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 06:07:52,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:52,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 06:07:52,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:52,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-20 06:07:52,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:52,681 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-11-20 06:07:52,681 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:07:52,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336347620] [2021-11-20 06:07:52,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336347620] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:07:52,682 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:07:52,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-20 06:07:52,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585802008] [2021-11-20 06:07:52,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:07:52,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 06:07:52,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:07:52,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 06:07:52,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:07:52,684 INFO L87 Difference]: Start difference. First operand 416 states and 488 transitions. Second operand has 8 states, 8 states have (on average 7.375) internal successors, (59), 5 states have internal predecessors, (59), 2 states have call successors, (17), 4 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 1 states have call successors, (16) [2021-11-20 06:07:53,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:07:53,279 INFO L93 Difference]: Finished difference Result 528 states and 638 transitions. [2021-11-20 06:07:53,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 06:07:53,280 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 5 states have internal predecessors, (59), 2 states have call successors, (17), 4 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 1 states have call successors, (16) Word has length 155 [2021-11-20 06:07:53,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:07:53,283 INFO L225 Difference]: With dead ends: 528 [2021-11-20 06:07:53,283 INFO L226 Difference]: Without dead ends: 465 [2021-11-20 06:07:53,284 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:07:53,285 INFO L933 BasicCegarLoop]: 148 mSDtfsCounter, 142 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 559 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:07:53,285 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 559 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 483 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-20 06:07:53,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2021-11-20 06:07:53,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 426. [2021-11-20 06:07:53,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 307 states have (on average 1.0781758957654723) internal successors, (331), 308 states have internal predecessors, (331), 77 states have call successors, (77), 39 states have call predecessors, (77), 41 states have return successors, (91), 78 states have call predecessors, (91), 75 states have call successors, (91) [2021-11-20 06:07:53,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 499 transitions. [2021-11-20 06:07:53,326 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 499 transitions. Word has length 155 [2021-11-20 06:07:53,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:07:53,327 INFO L470 AbstractCegarLoop]: Abstraction has 426 states and 499 transitions. [2021-11-20 06:07:53,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 5 states have internal predecessors, (59), 2 states have call successors, (17), 4 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 1 states have call successors, (16) [2021-11-20 06:07:53,327 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 499 transitions. [2021-11-20 06:07:53,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-20 06:07:53,329 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:07:53,329 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:07:53,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-11-20 06:07:53,330 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:07:53,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:07:53,330 INFO L85 PathProgramCache]: Analyzing trace with hash 2095970207, now seen corresponding path program 1 times [2021-11-20 06:07:53,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:07:53,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254189072] [2021-11-20 06:07:53,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:07:53,331 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:07:53,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:53,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 06:07:53,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:53,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:07:53,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:53,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-20 06:07:53,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:53,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:07:53,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:53,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-20 06:07:53,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:53,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-20 06:07:53,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:53,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-20 06:07:53,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:53,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-20 06:07:53,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:53,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-20 06:07:53,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:53,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:07:53,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:53,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-11-20 06:07:53,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:53,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:07:53,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:53,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-20 06:07:53,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:53,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 06:07:53,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:53,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 06:07:53,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:53,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-20 06:07:53,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:53,675 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-11-20 06:07:53,675 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:07:53,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254189072] [2021-11-20 06:07:53,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254189072] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:07:53,677 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:07:53,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-20 06:07:53,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851341880] [2021-11-20 06:07:53,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:07:53,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 06:07:53,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:07:53,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 06:07:53,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:07:53,679 INFO L87 Difference]: Start difference. First operand 426 states and 499 transitions. Second operand has 9 states, 9 states have (on average 6.666666666666667) internal successors, (60), 6 states have internal predecessors, (60), 4 states have call successors, (17), 4 states have call predecessors, (17), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-20 06:07:54,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:07:54,363 INFO L93 Difference]: Finished difference Result 449 states and 529 transitions. [2021-11-20 06:07:54,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 06:07:54,364 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.666666666666667) internal successors, (60), 6 states have internal predecessors, (60), 4 states have call successors, (17), 4 states have call predecessors, (17), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 156 [2021-11-20 06:07:54,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:07:54,366 INFO L225 Difference]: With dead ends: 449 [2021-11-20 06:07:54,366 INFO L226 Difference]: Without dead ends: 447 [2021-11-20 06:07:54,367 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-11-20 06:07:54,367 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 172 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 751 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 06:07:54,368 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 458 Invalid, 751 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 631 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-20 06:07:54,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-11-20 06:07:54,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 434. [2021-11-20 06:07:54,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 313 states have (on average 1.0766773162939298) internal successors, (337), 314 states have internal predecessors, (337), 77 states have call successors, (77), 41 states have call predecessors, (77), 43 states have return successors, (91), 78 states have call predecessors, (91), 75 states have call successors, (91) [2021-11-20 06:07:54,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 505 transitions. [2021-11-20 06:07:54,411 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 505 transitions. Word has length 156 [2021-11-20 06:07:54,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:07:54,412 INFO L470 AbstractCegarLoop]: Abstraction has 434 states and 505 transitions. [2021-11-20 06:07:54,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.666666666666667) internal successors, (60), 6 states have internal predecessors, (60), 4 states have call successors, (17), 4 states have call predecessors, (17), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-20 06:07:54,412 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 505 transitions. [2021-11-20 06:07:54,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-11-20 06:07:54,414 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:07:54,415 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:07:54,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-11-20 06:07:54,415 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:07:54,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:07:54,415 INFO L85 PathProgramCache]: Analyzing trace with hash -112341763, now seen corresponding path program 1 times [2021-11-20 06:07:54,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:07:54,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278010607] [2021-11-20 06:07:54,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:07:54,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:07:54,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:55,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 06:07:55,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:55,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:07:55,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:55,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-20 06:07:55,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:55,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:07:55,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:55,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-20 06:07:55,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:55,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-20 06:07:55,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:55,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-20 06:07:55,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:55,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-20 06:07:55,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:55,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-20 06:07:55,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:55,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:07:55,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:55,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-11-20 06:07:55,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:55,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:07:55,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:55,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-20 06:07:55,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:55,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 06:07:55,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:55,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 06:07:55,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:55,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-20 06:07:55,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:55,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2021-11-20 06:07:55,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:55,500 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2021-11-20 06:07:55,500 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:07:55,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278010607] [2021-11-20 06:07:55,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278010607] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:07:55,500 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:07:55,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-20 06:07:55,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284595317] [2021-11-20 06:07:55,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:07:55,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-20 06:07:55,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:07:55,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-20 06:07:55,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-11-20 06:07:55,502 INFO L87 Difference]: Start difference. First operand 434 states and 505 transitions. Second operand has 21 states, 18 states have (on average 3.388888888888889) internal successors, (61), 16 states have internal predecessors, (61), 10 states have call successors, (18), 4 states have call predecessors, (18), 3 states have return successors, (17), 9 states have call predecessors, (17), 9 states have call successors, (17) [2021-11-20 06:07:57,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:07:57,111 INFO L93 Difference]: Finished difference Result 470 states and 558 transitions. [2021-11-20 06:07:57,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-20 06:07:57,111 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 3.388888888888889) internal successors, (61), 16 states have internal predecessors, (61), 10 states have call successors, (18), 4 states have call predecessors, (18), 3 states have return successors, (17), 9 states have call predecessors, (17), 9 states have call successors, (17) Word has length 162 [2021-11-20 06:07:57,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:07:57,114 INFO L225 Difference]: With dead ends: 470 [2021-11-20 06:07:57,114 INFO L226 Difference]: Without dead ends: 468 [2021-11-20 06:07:57,114 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=140, Invalid=790, Unknown=0, NotChecked=0, Total=930 [2021-11-20 06:07:57,115 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 294 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 1791 mSolverCounterSat, 290 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 2081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 290 IncrementalHoareTripleChecker+Valid, 1791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:07:57,115 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [305 Valid, 461 Invalid, 2081 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [290 Valid, 1791 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-20 06:07:57,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-11-20 06:07:57,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 442. [2021-11-20 06:07:57,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 318 states have (on average 1.078616352201258) internal successors, (343), 320 states have internal predecessors, (343), 79 states have call successors, (79), 42 states have call predecessors, (79), 44 states have return successors, (93), 79 states have call predecessors, (93), 77 states have call successors, (93) [2021-11-20 06:07:57,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 515 transitions. [2021-11-20 06:07:57,161 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 515 transitions. Word has length 162 [2021-11-20 06:07:57,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:07:57,161 INFO L470 AbstractCegarLoop]: Abstraction has 442 states and 515 transitions. [2021-11-20 06:07:57,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 3.388888888888889) internal successors, (61), 16 states have internal predecessors, (61), 10 states have call successors, (18), 4 states have call predecessors, (18), 3 states have return successors, (17), 9 states have call predecessors, (17), 9 states have call successors, (17) [2021-11-20 06:07:57,162 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 515 transitions. [2021-11-20 06:07:57,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-11-20 06:07:57,164 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:07:57,164 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:07:57,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-11-20 06:07:57,165 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:07:57,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:07:57,165 INFO L85 PathProgramCache]: Analyzing trace with hash -680984155, now seen corresponding path program 1 times [2021-11-20 06:07:57,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:07:57,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272008403] [2021-11-20 06:07:57,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:07:57,166 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:07:57,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:57,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 06:07:57,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:57,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:07:57,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:57,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-20 06:07:57,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:57,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:07:57,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:57,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-20 06:07:57,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:57,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-20 06:07:57,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:57,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-20 06:07:57,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:57,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-20 06:07:57,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:57,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-20 06:07:57,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:57,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:07:57,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:57,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-11-20 06:07:57,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:57,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-11-20 06:07:57,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:57,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-11-20 06:07:57,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:57,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-11-20 06:07:57,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:57,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:07:57,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:57,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:07:57,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:57,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:07:57,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:57,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-20 06:07:57,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:57,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2021-11-20 06:07:57,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:57,510 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2021-11-20 06:07:57,510 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:07:57,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272008403] [2021-11-20 06:07:57,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272008403] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:07:57,511 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:07:57,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-20 06:07:57,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256866491] [2021-11-20 06:07:57,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:07:57,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 06:07:57,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:07:57,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 06:07:57,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:07:57,513 INFO L87 Difference]: Start difference. First operand 442 states and 515 transitions. Second operand has 10 states, 9 states have (on average 7.333333333333333) internal successors, (66), 6 states have internal predecessors, (66), 2 states have call successors, (21), 4 states have call predecessors, (21), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) [2021-11-20 06:07:58,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:07:58,176 INFO L93 Difference]: Finished difference Result 465 states and 544 transitions. [2021-11-20 06:07:58,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 06:07:58,177 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 7.333333333333333) internal successors, (66), 6 states have internal predecessors, (66), 2 states have call successors, (21), 4 states have call predecessors, (21), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) Word has length 166 [2021-11-20 06:07:58,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:07:58,180 INFO L225 Difference]: With dead ends: 465 [2021-11-20 06:07:58,180 INFO L226 Difference]: Without dead ends: 463 [2021-11-20 06:07:58,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-11-20 06:07:58,181 INFO L933 BasicCegarLoop]: 147 mSDtfsCounter, 154 mSDsluCounter, 584 mSDsCounter, 0 mSdLazyCounter, 646 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 731 SdHoareTripleChecker+Invalid, 750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:07:58,181 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 731 Invalid, 750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 646 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-20 06:07:58,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2021-11-20 06:07:58,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 452. [2021-11-20 06:07:58,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 324 states have (on average 1.0771604938271604) internal successors, (349), 327 states have internal predecessors, (349), 81 states have call successors, (81), 43 states have call predecessors, (81), 46 states have return successors, (99), 81 states have call predecessors, (99), 79 states have call successors, (99) [2021-11-20 06:07:58,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 529 transitions. [2021-11-20 06:07:58,226 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 529 transitions. Word has length 166 [2021-11-20 06:07:58,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:07:58,227 INFO L470 AbstractCegarLoop]: Abstraction has 452 states and 529 transitions. [2021-11-20 06:07:58,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 7.333333333333333) internal successors, (66), 6 states have internal predecessors, (66), 2 states have call successors, (21), 4 states have call predecessors, (21), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) [2021-11-20 06:07:58,227 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 529 transitions. [2021-11-20 06:07:58,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-11-20 06:07:58,230 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:07:58,230 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:07:58,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-11-20 06:07:58,230 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:07:58,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:07:58,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1909091545, now seen corresponding path program 1 times [2021-11-20 06:07:58,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:07:58,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326179176] [2021-11-20 06:07:58,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:07:58,231 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:07:59,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:00,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 06:08:00,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:00,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:08:00,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:00,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-20 06:08:00,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:00,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:08:00,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:00,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-20 06:08:00,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:00,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-20 06:08:00,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:00,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-20 06:08:00,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:00,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-20 06:08:00,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:00,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-20 06:08:00,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:00,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:08:00,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:00,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-11-20 06:08:00,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:00,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:08:00,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:00,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-20 06:08:00,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:00,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 06:08:00,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:00,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 06:08:00,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:00,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-20 06:08:00,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:00,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2021-11-20 06:08:00,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:00,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2021-11-20 06:08:00,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:00,735 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 15 proven. 18 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-11-20 06:08:00,735 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:08:00,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326179176] [2021-11-20 06:08:00,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326179176] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:08:00,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328948156] [2021-11-20 06:08:00,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:08:00,736 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:08:00,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:08:00,738 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:08:00,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-20 06:08:02,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:02,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 2764 conjuncts, 98 conjunts are in the unsatisfiable core [2021-11-20 06:08:02,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:08:02,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 06:08:02,502 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-20 06:08:02,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-20 06:08:02,556 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 19 treesize of output 1 [2021-11-20 06:08:03,656 INFO L354 Elim1Store]: treesize reduction 90, result has 21.1 percent of original size [2021-11-20 06:08:03,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 46 [2021-11-20 06:08:03,868 INFO L354 Elim1Store]: treesize reduction 64, result has 21.0 percent of original size [2021-11-20 06:08:03,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 42 treesize of output 48 [2021-11-20 06:08:03,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:08:03,881 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 06:08:03,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2021-11-20 06:08:04,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:08:04,103 INFO L354 Elim1Store]: treesize reduction 68, result has 21.8 percent of original size [2021-11-20 06:08:04,104 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 35 treesize of output 37 [2021-11-20 06:08:04,548 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 06:08:04,549 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 26 treesize of output 10 [2021-11-20 06:08:04,626 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 15 proven. 80 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-11-20 06:08:04,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:08:11,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328948156] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:08:11,339 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:08:11,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 30] total 43 [2021-11-20 06:08:11,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164791357] [2021-11-20 06:08:11,340 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:08:11,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-20 06:08:11,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:08:11,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-20 06:08:11,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=2073, Unknown=2, NotChecked=0, Total=2256 [2021-11-20 06:08:11,346 INFO L87 Difference]: Start difference. First operand 452 states and 529 transitions. Second operand has 43 states, 37 states have (on average 3.324324324324324) internal successors, (123), 36 states have internal predecessors, (123), 17 states have call successors, (35), 8 states have call predecessors, (35), 7 states have return successors, (33), 16 states have call predecessors, (33), 15 states have call successors, (33) [2021-11-20 06:08:13,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:08:13,815 INFO L93 Difference]: Finished difference Result 482 states and 567 transitions. [2021-11-20 06:08:13,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-20 06:08:13,816 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 37 states have (on average 3.324324324324324) internal successors, (123), 36 states have internal predecessors, (123), 17 states have call successors, (35), 8 states have call predecessors, (35), 7 states have return successors, (33), 16 states have call predecessors, (33), 15 states have call successors, (33) Word has length 168 [2021-11-20 06:08:13,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:08:13,818 INFO L225 Difference]: With dead ends: 482 [2021-11-20 06:08:13,818 INFO L226 Difference]: Without dead ends: 480 [2021-11-20 06:08:13,819 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 194 SyntacticMatches, 13 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1092 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=305, Invalid=3352, Unknown=3, NotChecked=0, Total=3660 [2021-11-20 06:08:13,819 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 293 mSDsluCounter, 992 mSDsCounter, 0 mSdLazyCounter, 1784 mSolverCounterSat, 237 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 1125 SdHoareTripleChecker+Invalid, 2879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 237 IncrementalHoareTripleChecker+Valid, 1784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 858 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:08:13,820 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [297 Valid, 1125 Invalid, 2879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [237 Valid, 1784 Invalid, 0 Unknown, 858 Unchecked, 1.4s Time] [2021-11-20 06:08:13,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2021-11-20 06:08:13,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 451. [2021-11-20 06:08:13,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 324 states have (on average 1.0771604938271604) internal successors, (349), 326 states have internal predecessors, (349), 80 states have call successors, (80), 43 states have call predecessors, (80), 46 states have return successors, (98), 81 states have call predecessors, (98), 78 states have call successors, (98) [2021-11-20 06:08:13,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 527 transitions. [2021-11-20 06:08:13,868 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 527 transitions. Word has length 168 [2021-11-20 06:08:13,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:08:13,869 INFO L470 AbstractCegarLoop]: Abstraction has 451 states and 527 transitions. [2021-11-20 06:08:13,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 37 states have (on average 3.324324324324324) internal successors, (123), 36 states have internal predecessors, (123), 17 states have call successors, (35), 8 states have call predecessors, (35), 7 states have return successors, (33), 16 states have call predecessors, (33), 15 states have call successors, (33) [2021-11-20 06:08:13,869 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 527 transitions. [2021-11-20 06:08:13,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-11-20 06:08:13,872 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:08:13,872 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:08:13,894 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-20 06:08:14,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-11-20 06:08:14,094 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:08:14,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:08:14,095 INFO L85 PathProgramCache]: Analyzing trace with hash 455427819, now seen corresponding path program 1 times [2021-11-20 06:08:14,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:08:14,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005006079] [2021-11-20 06:08:14,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:08:14,095 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:08:14,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:14,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 06:08:14,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:14,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:08:14,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:14,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-20 06:08:14,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:14,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:08:14,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:14,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-20 06:08:14,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:14,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-20 06:08:14,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:14,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-20 06:08:14,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:14,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-20 06:08:14,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:14,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-20 06:08:14,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:14,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:08:14,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:14,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-11-20 06:08:14,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:14,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-11-20 06:08:14,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:14,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-11-20 06:08:14,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:14,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-11-20 06:08:14,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:14,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:08:14,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:14,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:08:14,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:14,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:08:14,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:14,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-20 06:08:14,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:14,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2021-11-20 06:08:14,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:14,564 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2021-11-20 06:08:14,565 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:08:14,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005006079] [2021-11-20 06:08:14,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005006079] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:08:14,565 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:08:14,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-20 06:08:14,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333351599] [2021-11-20 06:08:14,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:08:14,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 06:08:14,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:08:14,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 06:08:14,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:08:14,567 INFO L87 Difference]: Start difference. First operand 451 states and 527 transitions. Second operand has 11 states, 10 states have (on average 6.4) internal successors, (64), 8 states have internal predecessors, (64), 5 states have call successors, (21), 5 states have call predecessors, (21), 3 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2021-11-20 06:08:15,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:08:15,272 INFO L93 Difference]: Finished difference Result 596 states and 716 transitions. [2021-11-20 06:08:15,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-20 06:08:15,274 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 6.4) internal successors, (64), 8 states have internal predecessors, (64), 5 states have call successors, (21), 5 states have call predecessors, (21), 3 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) Word has length 170 [2021-11-20 06:08:15,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:08:15,277 INFO L225 Difference]: With dead ends: 596 [2021-11-20 06:08:15,277 INFO L226 Difference]: Without dead ends: 453 [2021-11-20 06:08:15,278 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2021-11-20 06:08:15,279 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 163 mSDsluCounter, 673 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 814 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:08:15,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 814 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 664 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-20 06:08:15,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-11-20 06:08:15,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 452. [2021-11-20 06:08:15,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 325 states have (on average 1.0769230769230769) internal successors, (350), 327 states have internal predecessors, (350), 80 states have call successors, (80), 43 states have call predecessors, (80), 46 states have return successors, (98), 81 states have call predecessors, (98), 78 states have call successors, (98) [2021-11-20 06:08:15,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 528 transitions. [2021-11-20 06:08:15,326 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 528 transitions. Word has length 170 [2021-11-20 06:08:15,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:08:15,326 INFO L470 AbstractCegarLoop]: Abstraction has 452 states and 528 transitions. [2021-11-20 06:08:15,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 6.4) internal successors, (64), 8 states have internal predecessors, (64), 5 states have call successors, (21), 5 states have call predecessors, (21), 3 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2021-11-20 06:08:15,327 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 528 transitions. [2021-11-20 06:08:15,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-11-20 06:08:15,329 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:08:15,329 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:08:15,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-11-20 06:08:15,330 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:08:15,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:08:15,330 INFO L85 PathProgramCache]: Analyzing trace with hash 978298422, now seen corresponding path program 1 times [2021-11-20 06:08:15,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:08:15,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026930995] [2021-11-20 06:08:15,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:08:15,331 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:08:15,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:15,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 06:08:15,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:15,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:08:15,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:15,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-20 06:08:15,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:15,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:08:15,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:15,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-20 06:08:15,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:15,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-20 06:08:15,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:15,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-20 06:08:15,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:15,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-20 06:08:15,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:16,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-20 06:08:16,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:16,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-20 06:08:16,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:16,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:08:16,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:16,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-11-20 06:08:16,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:16,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:08:16,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:16,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-20 06:08:16,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:16,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 06:08:16,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:16,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 06:08:16,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:16,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-20 06:08:16,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:16,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2021-11-20 06:08:16,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:16,241 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 20 proven. 32 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2021-11-20 06:08:16,242 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:08:16,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026930995] [2021-11-20 06:08:16,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026930995] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:08:16,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109157995] [2021-11-20 06:08:16,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:08:16,243 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:08:16,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:08:16,244 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:08:16,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ba6000-20af-4f71-9640-2a828681920f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-20 06:08:16,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:16,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 2777 conjuncts, 90 conjunts are in the unsatisfiable core [2021-11-20 06:08:16,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:08:16,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 06:08:17,005 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-20 06:08:17,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-20 06:08:17,071 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 19 treesize of output 1 [2021-11-20 06:08:18,127 INFO L354 Elim1Store]: treesize reduction 106, result has 23.2 percent of original size [2021-11-20 06:08:18,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 38 treesize of output 57 [2021-11-20 06:08:18,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2021-11-20 06:08:21,144 INFO L354 Elim1Store]: treesize reduction 256, result has 23.1 percent of original size [2021-11-20 06:08:21,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 8 new quantified variables, introduced 14 case distinctions, treesize of input 113 treesize of output 165 [2021-11-20 06:08:22,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:08:22,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:08:22,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:08:22,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 24 [2021-11-20 06:08:22,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:08:22,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:08:22,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:08:22,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 25 [2021-11-20 06:08:22,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:08:22,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:08:22,321 INFO L354 Elim1Store]: treesize reduction 82, result has 1.2 percent of original size [2021-11-20 06:08:22,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 62 treesize of output 34 [2021-11-20 06:08:22,658 INFO L354 Elim1Store]: treesize reduction 89, result has 13.6 percent of original size [2021-11-20 06:08:22,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 96 treesize of output 72 [2021-11-20 06:08:22,793 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-11-20 06:08:22,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 40 [2021-11-20 06:08:22,821 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-20 06:08:22,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 48 [2021-11-20 06:08:28,859 INFO L354 Elim1Store]: treesize reduction 1106, result has 12.2 percent of original size [2021-11-20 06:08:28,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 1 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 78 case distinctions, treesize of input 207 treesize of output 277 [2021-11-20 06:08:28,906 INFO L354 Elim1Store]: treesize reduction 56, result has 23.3 percent of original size [2021-11-20 06:08:28,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 277 treesize of output 283 [2021-11-20 06:11:05,652 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_byte_buf_write_be64_~buf#1.base_BEFORE_CALL_43| Int) (|ULTIMATE.start_save_byte_from_array_~storage#1.base| Int)) (and (not (= |v_ULTIMATE.start_aws_byte_buf_write_be64_~buf#1.base_BEFORE_CALL_43| |ULTIMATE.start_save_byte_from_array_~storage#1.base|)) (or (exists ((v_prenex_4 Int) (|ULTIMATE.start_save_byte_from_array_~array#1.base| Int) (v_prenex_5 Int) (v_prenex_2 Int)) (and (= (select (select |c_#memory_int| |ULTIMATE.start_save_byte_from_array_~array#1.base|) (+ (- 18446744073709551616) v_prenex_2)) (select (select |c_#memory_int| v_prenex_4) (+ (- 18446744073709551616) v_prenex_5))) (let ((.cse3 (not (= (mod (select (select |c_#memory_int| |v_ULTIMATE.start_aws_byte_buf_write_be64_~buf#1.base_BEFORE_CALL_43|) 0) 18446744073709551616) 0)))) (let ((.cse4 (and (exists ((v_prenex_3 Int)) (<= (mod (select (select |c_#memory_int| |ULTIMATE.start_save_byte_from_array_~storage#1.base|) (+ v_prenex_3 (- 8))) 18446744073709551616) 9223372036854775807)) .cse3)) (.cse5 (and (exists ((v_arrayElimIndex_2 Int)) (let ((.cse9 (select |c_#memory_int| |ULTIMATE.start_save_byte_from_array_~storage#1.base|))) (and (<= (mod (select .cse9 (+ v_arrayElimIndex_2 (- 18446744073709551624))) 18446744073709551616) 9223372036854775807) (= (select .cse9 v_arrayElimIndex_2) (select .cse9 (+ v_arrayElimIndex_2 (- 18446744073709551616))))))) .cse3)) (.cse7 (and (exists ((|ULTIMATE.start_save_byte_from_array_~storage#1.offset| Int)) (let ((.cse8 (select |c_#memory_int| |ULTIMATE.start_save_byte_from_array_~storage#1.base|))) (and (< 9223372036854775807 (mod (select .cse8 |ULTIMATE.start_save_byte_from_array_~storage#1.offset|) 18446744073709551616)) (= (select (select |c_#memory_int| |ULTIMATE.start_save_byte_from_array_~array#1.base|) (+ (- 18446744073709551616) v_prenex_2)) (select .cse8 (+ |ULTIMATE.start_save_byte_from_array_~storage#1.offset| 8)))))) .cse3))) (or (and (exists ((v_prenex_6 Int)) (let ((.cse2 (select (select |c_#memory_int| v_prenex_4) v_prenex_5)) (.cse1 (+ 8 v_prenex_6)) (.cse0 (select |c_#memory_int| |ULTIMATE.start_save_byte_from_array_~storage#1.base|))) (and (= (select .cse0 .cse1) .cse2) (or (= (select (select |c_#memory_int| |ULTIMATE.start_save_byte_from_array_~array#1.base|) (+ (- 18446744073709551616) v_prenex_2)) .cse2) (not (= |ULTIMATE.start_save_byte_from_array_~storage#1.base| v_prenex_4)) (not (= v_prenex_5 .cse1))) (<= (mod (select .cse0 v_prenex_6) 18446744073709551616) 9223372036854775807)))) .cse3) .cse4 (and (not (= |v_ULTIMATE.start_aws_byte_buf_write_be64_~buf#1.base_BEFORE_CALL_43| v_prenex_4)) (not (= |ULTIMATE.start_save_byte_from_array_~storage#1.base| v_prenex_4)) (or .cse4 .cse5 (and (exists ((v_prenex_6 Int)) (let ((.cse6 (select |c_#memory_int| |ULTIMATE.start_save_byte_from_array_~storage#1.base|))) (and (or (= (select (select |c_#memory_int| |ULTIMATE.start_save_byte_from_array_~array#1.base|) (+ (- 18446744073709551616) v_prenex_2)) (select .cse6 (+ 8 v_prenex_6))) (not (= (+ 18446744073709551616 v_prenex_5) v_prenex_2)) (not (= |ULTIMATE.start_save_byte_from_array_~array#1.base| v_prenex_4))) (<= (mod (select .cse6 v_prenex_6) 18446744073709551616) 9223372036854775807)))) .cse3) .cse7)) .cse5 .cse7))))) (exists ((v_prenex_4 Int) (|ULTIMATE.start_save_byte_from_array_~array#1.base| Int)) (and (let ((.cse13 (not (= (mod (select (select |c_#memory_int| |v_ULTIMATE.start_aws_byte_buf_write_be64_~buf#1.base_BEFORE_CALL_43|) 0) 18446744073709551616) 0)))) (let ((.cse10 (not (= |v_ULTIMATE.start_aws_byte_buf_write_be64_~buf#1.base_BEFORE_CALL_43| v_prenex_4))) (.cse16 (not (= |ULTIMATE.start_save_byte_from_array_~storage#1.base| v_prenex_4))) (.cse11 (and (exists ((v_prenex_3 Int)) (<= (mod (select (select |c_#memory_int| |ULTIMATE.start_save_byte_from_array_~storage#1.base|) (+ v_prenex_3 (- 8))) 18446744073709551616) 9223372036854775807)) .cse13)) (.cse12 (and (exists ((v_arrayElimIndex_2 Int)) (let ((.cse23 (select |c_#memory_int| |ULTIMATE.start_save_byte_from_array_~storage#1.base|))) (and (<= (mod (select .cse23 (+ v_arrayElimIndex_2 (- 18446744073709551624))) 18446744073709551616) 9223372036854775807) (= (select .cse23 v_arrayElimIndex_2) (select .cse23 (+ v_arrayElimIndex_2 (- 18446744073709551616))))))) .cse13)) (.cse17 (and (exists ((v_prenex_6 Int) (v_prenex_5 Int)) (let ((.cse19 (select |c_#memory_int| v_prenex_4))) (let ((.cse21 (+ 8 v_prenex_6)) (.cse20 (select .cse19 v_prenex_5)) (.cse22 (select |c_#memory_int| |ULTIMATE.start_save_byte_from_array_~storage#1.base|))) (and (or (not (= |ULTIMATE.start_save_byte_from_array_~storage#1.base| v_prenex_4)) (= (select .cse19 (+ (- 18446744073709551616) v_prenex_5)) .cse20) (not (= v_prenex_5 .cse21))) (= (select .cse22 .cse21) .cse20) (<= (mod (select .cse22 v_prenex_6) 18446744073709551616) 9223372036854775807))))) .cse13)) (.cse15 (and .cse13 (exists ((v_prenex_2 Int) (|ULTIMATE.start_save_byte_from_array_~storage#1.offset| Int)) (let ((.cse18 (select |c_#memory_int| |ULTIMATE.start_save_byte_from_array_~storage#1.base|))) (and (< 9223372036854775807 (mod (select .cse18 |ULTIMATE.start_save_byte_from_array_~storage#1.offset|) 18446744073709551616)) (= (select (select |c_#memory_int| |ULTIMATE.start_save_byte_from_array_~array#1.base|) (+ (- 18446744073709551616) v_prenex_2)) (select .cse18 (+ |ULTIMATE.start_save_byte_from_array_~storage#1.offset| 8))))))))) (or (and .cse10 (or .cse11 .cse12 (and .cse13 (exists ((v_prenex_6 Int) (v_prenex_5 Int)) (let ((.cse14 (select |c_#memory_int| |ULTIMATE.start_save_byte_from_array_~storage#1.base|))) (and (= (select .cse14 (+ 8 v_prenex_6)) (select (select |c_#memory_int| v_prenex_4) v_prenex_5)) (<= (mod (select .cse14 v_prenex_6) 18446744073709551616) 9223372036854775807))))) .cse15) .cse16) .cse11 .cse12 (and (or .cse11 .cse12 .cse17 (and .cse13 (exists ((|ULTIMATE.start_save_byte_from_array_~storage#1.offset| Int)) (< 9223372036854775807 (mod (select (select |c_#memory_int| |ULTIMATE.start_save_byte_from_array_~storage#1.base|) |ULTIMATE.start_save_byte_from_array_~storage#1.offset|) 18446744073709551616))))) (not (= |v_ULTIMATE.start_aws_byte_buf_write_be64_~buf#1.base_BEFORE_CALL_43| |ULTIMATE.start_save_byte_from_array_~array#1.base|)) (not (= |ULTIMATE.start_save_byte_from_array_~storage#1.base| |ULTIMATE.start_save_byte_from_array_~array#1.base|))) (and .cse10 .cse16 (or .cse11 .cse12 (and .cse13 (exists ((v_prenex_6 Int)) (<= (mod (select (select |c_#memory_int| |ULTIMATE.start_save_byte_from_array_~storage#1.base|) v_prenex_6) 18446744073709551616) 9223372036854775807))) .cse15)) .cse17 .cse15))) (not (= |ULTIMATE.start_save_byte_from_array_~array#1.base| v_prenex_4)))) (exists ((|ULTIMATE.start_save_byte_from_array_~array#1.base| Int)) (and (let ((.cse25 (not (= (mod (select (select |c_#memory_int| |v_ULTIMATE.start_aws_byte_buf_write_be64_~buf#1.base_BEFORE_CALL_43|) 0) 18446744073709551616) 0)))) (or (and (exists ((v_prenex_2 Int) (|ULTIMATE.start_save_byte_from_array_~storage#1.offset| Int)) (let ((.cse24 (select |c_#memory_int| |ULTIMATE.start_save_byte_from_array_~storage#1.base|))) (and (< 9223372036854775807 (mod (select .cse24 |ULTIMATE.start_save_byte_from_array_~storage#1.offset|) 18446744073709551616)) (= (select (select |c_#memory_int| |ULTIMATE.start_save_byte_from_array_~array#1.base|) (+ v_prenex_2 (- 36893488147419103232))) (select .cse24 (+ |ULTIMATE.start_save_byte_from_array_~storage#1.offset| 8)))))) .cse25) (and (exists ((v_prenex_6 Int) (v_prenex_5 Int)) (let ((.cse26 (select |c_#memory_int| |ULTIMATE.start_save_byte_from_array_~storage#1.base|))) (and (= (select .cse26 (+ 8 v_prenex_6)) (select (select |c_#memory_int| |ULTIMATE.start_save_byte_from_array_~array#1.base|) v_prenex_5)) (<= (mod (select .cse26 v_prenex_6) 18446744073709551616) 9223372036854775807)))) .cse25) (and (exists ((v_prenex_3 Int)) (<= (mod (select (select |c_#memory_int| |ULTIMATE.start_save_byte_from_array_~storage#1.base|) (+ v_prenex_3 (- 8))) 18446744073709551616) 9223372036854775807)) .cse25) (and .cse25 (exists ((v_prenex_6 Int) (v_prenex_2 Int)) (let ((.cse27 (select |c_#memory_int| |ULTIMATE.start_save_byte_from_array_~storage#1.base|))) (and (= (select .cse27 (+ 8 v_prenex_6)) (select (select |c_#memory_int| |ULTIMATE.start_save_byte_from_array_~array#1.base|) (+ v_prenex_2 (- 36893488147419103232)))) (<= (mod (select .cse27 v_prenex_6) 18446744073709551616) 9223372036854775807))))) (and .cse25 (exists ((v_prenex_4 Int) (v_prenex_5 Int) (|ULTIMATE.start_save_byte_from_array_~storage#1.offset| Int)) (let ((.cse28 (select |c_#memory_int| |ULTIMATE.start_save_byte_from_array_~storage#1.base|))) (and (= (select .cse28 (+ |ULTIMATE.start_save_byte_from_array_~storage#1.offset| 8)) (select (select |c_#memory_int| v_prenex_4) (+ (- 18446744073709551616) v_prenex_5))) (< 9223372036854775807 (mod (select .cse28 |ULTIMATE.start_save_byte_from_array_~storage#1.offset|) 18446744073709551616)))))) (and (exists ((v_arrayElimIndex_2 Int)) (let ((.cse29 (select |c_#memory_int| |ULTIMATE.start_save_byte_from_array_~storage#1.base|))) (and (<= (mod (select .cse29 (+ v_arrayElimIndex_2 (- 18446744073709551624))) 18446744073709551616) 9223372036854775807) (= (select .cse29 v_arrayElimIndex_2) (select .cse29 (+ v_arrayElimIndex_2 (- 18446744073709551616))))))) .cse25) (and (exists ((v_prenex_6 Int) (v_prenex_4 Int) (v_prenex_5 Int)) (let ((.cse30 (select |c_#memory_int| v_prenex_4))) (let ((.cse32 (+ 8 v_prenex_6)) (.cse31 (select .cse30 v_prenex_5)) (.cse33 (select |c_#memory_int| |ULTIMATE.start_save_byte_from_array_~storage#1.base|))) (and (or (not (= |ULTIMATE.start_save_byte_from_array_~storage#1.base| v_prenex_4)) (= (select .cse30 (+ (- 18446744073709551616) v_prenex_5)) .cse31) (not (= v_prenex_5 .cse32))) (= (select .cse33 .cse32) .cse31) (<= (mod (select .cse33 v_prenex_6) 18446744073709551616) 9223372036854775807))))) .cse25) (and (exists ((v_prenex_5 Int) (|ULTIMATE.start_save_byte_from_array_~storage#1.offset| Int)) (let ((.cse34 (select |c_#memory_int| |ULTIMATE.start_save_byte_from_array_~storage#1.base|))) (and (< 9223372036854775807 (mod (select .cse34 |ULTIMATE.start_save_byte_from_array_~storage#1.offset|) 18446744073709551616)) (= (select .cse34 (+ |ULTIMATE.start_save_byte_from_array_~storage#1.offset| 8)) (select (select |c_#memory_int| |ULTIMATE.start_save_byte_from_array_~array#1.base|) v_prenex_5))))) .cse25) (and .cse25 (exists ((|ULTIMATE.start_save_byte_from_array_~storage#1.offset| Int)) (< 9223372036854775807 (mod (select (select |c_#memory_int| |ULTIMATE.start_save_byte_from_array_~storage#1.base|) |ULTIMATE.start_save_byte_from_array_~storage#1.offset|) 18446744073709551616)))))) (not (= |v_ULTIMATE.start_aws_byte_buf_write_be64_~buf#1.base_BEFORE_CALL_43| |ULTIMATE.start_save_byte_from_array_~array#1.base|)) (not (= |ULTIMATE.start_save_byte_from_array_~storage#1.base| |ULTIMATE.start_save_byte_from_array_~array#1.base|)))) (exists ((v_prenex_4 Int)) (and (not (= |v_ULTIMATE.start_aws_byte_buf_write_be64_~buf#1.base_BEFORE_CALL_43| v_prenex_4)) (let ((.cse35 (not (= (mod (select (select |c_#memory_int| |v_ULTIMATE.start_aws_byte_buf_write_be64_~buf#1.base_BEFORE_CALL_43|) 0) 18446744073709551616) 0)))) (or (and .cse35 (exists ((|ULTIMATE.start_save_byte_from_array_~array#1.base| Int) (v_prenex_2 Int) (|ULTIMATE.start_save_byte_from_array_~storage#1.offset| Int)) (let ((.cse36 (select |c_#memory_int| |ULTIMATE.start_save_byte_from_array_~storage#1.base|))) (and (< 9223372036854775807 (mod (select .cse36 |ULTIMATE.start_save_byte_from_array_~storage#1.offset|) 18446744073709551616)) (= (select (select |c_#memory_int| |ULTIMATE.start_save_byte_from_array_~array#1.base|) (+ (- 18446744073709551616) v_prenex_2)) (select .cse36 (+ |ULTIMATE.start_save_byte_from_array_~storage#1.offset| 8))))))) (and (exists ((v_prenex_3 Int)) (<= (mod (select (select |c_#memory_int| |ULTIMATE.start_save_byte_from_array_~storage#1.base|) (+ v_prenex_3 (- 8))) 18446744073709551616) 9223372036854775807)) .cse35) (and (exists ((v_arrayElimIndex_2 Int)) (let ((.cse37 (select |c_#memory_int| |ULTIMATE.start_save_byte_from_array_~storage#1.base|))) (and (<= (mod (select .cse37 (+ v_arrayElimIndex_2 (- 18446744073709551624))) 18446744073709551616) 9223372036854775807) (= (select .cse37 v_arrayElimIndex_2) (select .cse37 (+ v_arrayElimIndex_2 (- 18446744073709551616))))))) .cse35) (and .cse35 (exists ((v_prenex_6 Int) (v_prenex_5 Int)) (let ((.cse38 (select |c_#memory_int| |ULTIMATE.start_save_byte_from_array_~storage#1.base|))) (and (= (select .cse38 (+ 8 v_prenex_6)) (select (select |c_#memory_int| v_prenex_4) v_prenex_5)) (<= (mod (select .cse38 v_prenex_6) 18446744073709551616) 9223372036854775807))))))) (not (= |ULTIMATE.start_save_byte_from_array_~storage#1.base| v_prenex_4)))) (exists ((v_prenex_5 Int) (v_prenex_2 Int)) (and (not (= v_prenex_5 v_prenex_2)) (let ((.cse39 (not (= (mod (select (select |c_#memory_int| |v_ULTIMATE.start_aws_byte_buf_write_be64_~buf#1.base_BEFORE_CALL_43|) 0) 18446744073709551616) 0)))) (let ((.cse41 (and (exists ((v_prenex_3 Int)) (<= (mod (select (select |c_#memory_int| |ULTIMATE.start_save_byte_from_array_~storage#1.base|) (+ v_prenex_3 (- 8))) 18446744073709551616) 9223372036854775807)) .cse39)) (.cse42 (and (exists ((v_arrayElimIndex_2 Int)) (let ((.cse53 (select |c_#memory_int| |ULTIMATE.start_save_byte_from_array_~storage#1.base|))) (and (<= (mod (select .cse53 (+ v_arrayElimIndex_2 (- 18446744073709551624))) 18446744073709551616) 9223372036854775807) (= (select .cse53 v_arrayElimIndex_2) (select .cse53 (+ v_arrayElimIndex_2 (- 18446744073709551616))))))) .cse39)) (.cse51 (and .cse39 (exists ((v_prenex_6 Int)) (<= (mod (select (select |c_#memory_int| |ULTIMATE.start_save_byte_from_array_~storage#1.base|) v_prenex_6) 18446744073709551616) 9223372036854775807)))) (.cse52 (and .cse39 (exists ((|ULTIMATE.start_save_byte_from_array_~storage#1.offset| Int)) (< 9223372036854775807 (mod (select (select |c_#memory_int| |ULTIMATE.start_save_byte_from_array_~storage#1.base|) |ULTIMATE.start_save_byte_from_array_~storage#1.offset|) 18446744073709551616)))))) (or (and .cse39 (exists ((|ULTIMATE.start_save_byte_from_array_~array#1.base| Int) (|ULTIMATE.start_save_byte_from_array_~storage#1.offset| Int)) (let ((.cse40 (select |c_#memory_int| |ULTIMATE.start_save_byte_from_array_~storage#1.base|))) (and (< 9223372036854775807 (mod (select .cse40 |ULTIMATE.start_save_byte_from_array_~storage#1.offset|) 18446744073709551616)) (= (select (select |c_#memory_int| |ULTIMATE.start_save_byte_from_array_~array#1.base|) (+ (- 18446744073709551616) v_prenex_2)) (select .cse40 (+ |ULTIMATE.start_save_byte_from_array_~storage#1.offset| 8))))))) .cse41 .cse42 (and (exists ((v_prenex_6 Int) (v_prenex_4 Int)) (let ((.cse43 (select |c_#memory_int| v_prenex_4))) (let ((.cse45 (+ 8 v_prenex_6)) (.cse44 (select .cse43 v_prenex_5)) (.cse46 (select |c_#memory_int| |ULTIMATE.start_save_byte_from_array_~storage#1.base|))) (and (or (not (= |ULTIMATE.start_save_byte_from_array_~storage#1.base| v_prenex_4)) (= (select .cse43 (+ (- 18446744073709551616) v_prenex_5)) .cse44) (not (= v_prenex_5 .cse45))) (= (select .cse46 .cse45) .cse44) (<= (mod (select .cse46 v_prenex_6) 18446744073709551616) 9223372036854775807))))) .cse39) (exists ((v_prenex_4 Int)) (and (let ((.cse47 (not (= (mod (select (select |c_#memory_int| |v_ULTIMATE.start_aws_byte_buf_write_be64_~buf#1.base_BEFORE_CALL_43|) 0) 18446744073709551616) 0)))) (or (and .cse47 (exists ((|ULTIMATE.start_save_byte_from_array_~array#1.base| Int) (|ULTIMATE.start_save_byte_from_array_~storage#1.offset| Int)) (let ((.cse48 (select |c_#memory_int| |ULTIMATE.start_save_byte_from_array_~storage#1.base|))) (and (< 9223372036854775807 (mod (select .cse48 |ULTIMATE.start_save_byte_from_array_~storage#1.offset|) 18446744073709551616)) (= (select (select |c_#memory_int| |ULTIMATE.start_save_byte_from_array_~array#1.base|) (+ (- 18446744073709551616) v_prenex_2)) (select .cse48 (+ |ULTIMATE.start_save_byte_from_array_~storage#1.offset| 8))))))) (and (exists ((v_prenex_3 Int)) (<= (mod (select (select |c_#memory_int| |ULTIMATE.start_save_byte_from_array_~storage#1.base|) (+ v_prenex_3 (- 8))) 18446744073709551616) 9223372036854775807)) .cse47) (and (exists ((v_arrayElimIndex_2 Int)) (let ((.cse49 (select |c_#memory_int| |ULTIMATE.start_save_byte_from_array_~storage#1.base|))) (and (<= (mod (select .cse49 (+ v_arrayElimIndex_2 (- 18446744073709551624))) 18446744073709551616) 9223372036854775807) (= (select .cse49 v_arrayElimIndex_2) (select .cse49 (+ v_arrayElimIndex_2 (- 18446744073709551616))))))) .cse47) (and (exists ((v_prenex_6 Int)) (let ((.cse50 (select |c_#memory_int| |ULTIMATE.start_save_byte_from_array_~storage#1.base|))) (and (= (select .cse50 (+ 8 v_prenex_6)) (select (select |c_#memory_int| v_prenex_4) v_prenex_5)) (<= (mod (select .cse50 v_prenex_6) 18446744073709551616) 9223372036854775807)))) .cse47))) (not (= |v_ULTIMATE.start_aws_byte_buf_write_be64_~buf#1.base_BEFORE_CALL_43| v_prenex_4)) (not (= |ULTIMATE.start_save_byte_from_array_~storage#1.base| v_prenex_4)))) .cse51 .cse52 (and (or .cse41 .cse42 .cse51 .cse52) (= (+ 18446744073709551616 v_prenex_5) v_prenex_2)))))))))) is different from true