./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_ignore_case_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_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/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_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_ignore_case_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/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_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/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 82914be9df39aade96902f979c145aa97bb18d611f7f0e9a90ee0ab6b53af5a2 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 05:53:12,033 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 05:53:12,036 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 05:53:12,109 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 05:53:12,110 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 05:53:12,112 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 05:53:12,114 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 05:53:12,117 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 05:53:12,120 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 05:53:12,121 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 05:53:12,123 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 05:53:12,125 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 05:53:12,125 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 05:53:12,127 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 05:53:12,129 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 05:53:12,131 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 05:53:12,132 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 05:53:12,134 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 05:53:12,137 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 05:53:12,140 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 05:53:12,143 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 05:53:12,145 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 05:53:12,147 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 05:53:12,148 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 05:53:12,153 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 05:53:12,153 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 05:53:12,154 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 05:53:12,156 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 05:53:12,157 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 05:53:12,158 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 05:53:12,159 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 05:53:12,160 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 05:53:12,161 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 05:53:12,162 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 05:53:12,164 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 05:53:12,165 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 05:53:12,166 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 05:53:12,166 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 05:53:12,167 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 05:53:12,168 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 05:53:12,169 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 05:53:12,171 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-20 05:53:12,198 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 05:53:12,199 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 05:53:12,199 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 05:53:12,200 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 05:53:12,201 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 05:53:12,201 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 05:53:12,202 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 05:53:12,202 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 05:53:12,203 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 05:53:12,203 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 05:53:12,203 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 05:53:12,204 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 05:53:12,204 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 05:53:12,204 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 05:53:12,205 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 05:53:12,205 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 05:53:12,205 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 05:53:12,206 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 05:53:12,206 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 05:53:12,206 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 05:53:12,207 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 05:53:12,207 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 05:53:12,207 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 05:53:12,208 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 05:53:12,208 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 05:53:12,208 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 05:53:12,209 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 05:53:12,209 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 05:53:12,209 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 05:53:12,210 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 05:53:12,210 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 05:53:12,210 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_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 82914be9df39aade96902f979c145aa97bb18d611f7f0e9a90ee0ab6b53af5a2 [2021-11-20 05:53:12,578 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 05:53:12,613 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 05:53:12,617 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 05:53:12,618 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 05:53:12,619 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 05:53:12,621 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_ignore_case_harness.i [2021-11-20 05:53:12,704 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/bin/uautomizer-DQz5hQGWxF/data/9513b1aca/6292ee76dcd14b80b03dcaf9d4589bfd/FLAG9ad6cbb1e [2021-11-20 05:53:13,773 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 05:53:13,774 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_ignore_case_harness.i [2021-11-20 05:53:13,817 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/bin/uautomizer-DQz5hQGWxF/data/9513b1aca/6292ee76dcd14b80b03dcaf9d4589bfd/FLAG9ad6cbb1e [2021-11-20 05:53:14,172 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/bin/uautomizer-DQz5hQGWxF/data/9513b1aca/6292ee76dcd14b80b03dcaf9d4589bfd [2021-11-20 05:53:14,176 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 05:53:14,180 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 05:53:14,185 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 05:53:14,186 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 05:53:14,191 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 05:53:14,192 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:53:14" (1/1) ... [2021-11-20 05:53:14,195 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10fec62c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:53:14, skipping insertion in model container [2021-11-20 05:53:14,195 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:53:14" (1/1) ... [2021-11-20 05:53:14,205 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 05:53:14,395 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 05:53:14,698 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_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_ignore_case_harness.i[4501,4514] [2021-11-20 05:53:14,705 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_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_ignore_case_harness.i[4561,4574] [2021-11-20 05:53:15,919 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:53:15,920 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:53:15,921 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:53:15,922 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:53:15,924 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:53:15,944 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:53:15,945 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:53:15,948 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:53:15,949 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:53:16,479 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-20 05:53:16,480 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-20 05:53:16,482 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-20 05:53:16,483 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-20 05:53:16,485 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-20 05:53:16,486 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-20 05:53:16,487 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-20 05:53:16,488 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-20 05:53:16,489 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-20 05:53:16,490 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-20 05:53:16,693 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-20 05:53:16,817 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:53:16,818 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:53:16,913 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 05:53:17,058 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 05:53:17,095 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_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_ignore_case_harness.i[4501,4514] [2021-11-20 05:53:17,103 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_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_ignore_case_harness.i[4561,4574] [2021-11-20 05:53:17,183 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:53:17,184 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:53:17,185 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:53:17,185 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:53:17,186 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:53:17,195 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:53:17,196 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:53:17,198 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:53:17,198 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:53:17,264 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-20 05:53:17,265 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-20 05:53:17,266 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-20 05:53:17,267 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-20 05:53:17,268 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-20 05:53:17,269 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-20 05:53:17,270 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-20 05:53:17,270 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-20 05:53:17,271 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-20 05:53:17,272 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-20 05:53:17,308 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-20 05:53:17,426 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:53:17,428 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:53:17,466 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 05:53:17,910 INFO L208 MainTranslator]: Completed translation [2021-11-20 05:53:17,911 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:53:17 WrapperNode [2021-11-20 05:53:17,911 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 05:53:17,912 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 05:53:17,913 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 05:53:17,913 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 05:53:17,940 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:53:17" (1/1) ... [2021-11-20 05:53:18,053 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:53:17" (1/1) ... [2021-11-20 05:53:18,169 INFO L137 Inliner]: procedures = 691, calls = 2661, calls flagged for inlining = 59, calls inlined = 5, statements flattened = 862 [2021-11-20 05:53:18,170 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 05:53:18,171 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 05:53:18,171 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 05:53:18,172 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 05:53:18,182 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:53:17" (1/1) ... [2021-11-20 05:53:18,182 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:53:17" (1/1) ... [2021-11-20 05:53:18,192 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:53:17" (1/1) ... [2021-11-20 05:53:18,192 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:53:17" (1/1) ... [2021-11-20 05:53:18,235 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:53:17" (1/1) ... [2021-11-20 05:53:18,240 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:53:17" (1/1) ... [2021-11-20 05:53:18,255 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:53:17" (1/1) ... [2021-11-20 05:53:18,283 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 05:53:18,284 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 05:53:18,290 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 05:53:18,290 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 05:53:18,291 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:53:17" (1/1) ... [2021-11-20 05:53:18,313 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 05:53:18,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:53:18,348 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 05:53:18,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 05:53:18,397 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_valid [2021-11-20 05:53:18,397 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_valid [2021-11-20 05:53:18,398 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_eq_ignore_case [2021-11-20 05:53:18,398 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_eq_ignore_case [2021-11-20 05:53:18,399 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 05:53:18,399 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-11-20 05:53:18,399 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-11-20 05:53:18,400 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 05:53:18,400 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-20 05:53:18,400 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-20 05:53:18,401 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 05:53:18,402 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 05:53:18,402 INFO L130 BoogieDeclarations]: Found specification of procedure save_byte_from_array [2021-11-20 05:53:18,402 INFO L138 BoogieDeclarations]: Found implementation of procedure save_byte_from_array [2021-11-20 05:53:18,403 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-20 05:53:18,403 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_byte_buf_has_allocated_buffer_member [2021-11-20 05:53:18,403 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_byte_buf_has_allocated_buffer_member [2021-11-20 05:53:18,403 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 05:53:18,404 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 05:53:18,404 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-11-20 05:53:18,404 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-11-20 05:53:18,405 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2021-11-20 05:53:18,405 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2021-11-20 05:53:18,405 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-20 05:53:18,405 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-20 05:53:18,406 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 05:53:18,406 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-20 05:53:18,406 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-20 05:53:18,406 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2021-11-20 05:53:18,407 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2021-11-20 05:53:18,408 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_bounded [2021-11-20 05:53:18,408 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_bounded [2021-11-20 05:53:18,408 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 05:53:18,409 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_buf_equivalence [2021-11-20 05:53:18,409 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_buf_equivalence [2021-11-20 05:53:18,409 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 05:53:18,741 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 05:53:18,743 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 05:53:20,492 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 05:53:20,508 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 05:53:20,508 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-20 05:53:20,512 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:53:20 BoogieIcfgContainer [2021-11-20 05:53:20,512 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 05:53:20,514 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 05:53:20,514 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 05:53:20,519 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 05:53:20,519 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 05:53:14" (1/3) ... [2021-11-20 05:53:20,520 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@91118cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:53:20, skipping insertion in model container [2021-11-20 05:53:20,521 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:53:17" (2/3) ... [2021-11-20 05:53:20,521 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@91118cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:53:20, skipping insertion in model container [2021-11-20 05:53:20,521 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:53:20" (3/3) ... [2021-11-20 05:53:20,524 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_byte_buf_eq_ignore_case_harness.i [2021-11-20 05:53:20,531 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 05:53:20,531 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 05:53:20,594 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 05:53:20,603 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 05:53:20,604 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 05:53:20,631 INFO L276 IsEmpty]: Start isEmpty. Operand has 143 states, 87 states have (on average 1.2413793103448276) internal successors, (108), 88 states have internal predecessors, (108), 42 states have call successors, (42), 12 states have call predecessors, (42), 12 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2021-11-20 05:53:20,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-20 05:53:20,647 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:53:20,648 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:53:20,649 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:53:20,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:53:20,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1731481966, now seen corresponding path program 1 times [2021-11-20 05:53:20,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:53:20,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215738465] [2021-11-20 05:53:20,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:53:20,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:53:21,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:21,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 05:53:21,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:21,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 05:53:21,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:21,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 05:53:21,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:21,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:53:21,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:21,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 05:53:21,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:21,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:53:21,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:21,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 05:53:21,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:21,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-20 05:53:21,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:21,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-20 05:53:21,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:21,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-20 05:53:21,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:21,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-20 05:53:21,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:21,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-20 05:53:21,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:21,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-20 05:53:21,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:21,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-11-20 05:53:21,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:21,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-11-20 05:53:21,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:21,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-11-20 05:53:21,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:21,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:53:21,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:21,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 05:53:21,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:21,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-11-20 05:53:21,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:21,874 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-11-20 05:53:21,875 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:53:21,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215738465] [2021-11-20 05:53:21,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215738465] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:53:21,876 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:53:21,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 05:53:21,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341576976] [2021-11-20 05:53:21,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:53:21,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 05:53:21,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:53:21,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 05:53:21,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:53:21,927 INFO L87 Difference]: Start difference. First operand has 143 states, 87 states have (on average 1.2413793103448276) internal successors, (108), 88 states have internal predecessors, (108), 42 states have call successors, (42), 12 states have call predecessors, (42), 12 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 2 states have internal predecessors, (39), 2 states have call successors, (20), 5 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-20 05:53:22,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:53:22,596 INFO L93 Difference]: Finished difference Result 284 states and 410 transitions. [2021-11-20 05:53:22,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 05:53:22,599 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 2 states have internal predecessors, (39), 2 states have call successors, (20), 5 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 113 [2021-11-20 05:53:22,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:53:22,617 INFO L225 Difference]: With dead ends: 284 [2021-11-20 05:53:22,618 INFO L226 Difference]: Without dead ends: 140 [2021-11-20 05:53:22,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:53:22,640 INFO L933 BasicCegarLoop]: 160 mSDtfsCounter, 219 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 05:53:22,641 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 209 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-20 05:53:22,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-11-20 05:53:22,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 138. [2021-11-20 05:53:22,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 83 states have (on average 1.216867469879518) internal successors, (101), 84 states have internal predecessors, (101), 42 states have call successors, (42), 12 states have call predecessors, (42), 12 states have return successors, (41), 41 states have call predecessors, (41), 41 states have call successors, (41) [2021-11-20 05:53:22,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 184 transitions. [2021-11-20 05:53:22,736 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 184 transitions. Word has length 113 [2021-11-20 05:53:22,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:53:22,736 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 184 transitions. [2021-11-20 05:53:22,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 2 states have internal predecessors, (39), 2 states have call successors, (20), 5 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-20 05:53:22,738 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 184 transitions. [2021-11-20 05:53:22,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-20 05:53:22,751 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:53:22,752 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:53:22,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 05:53:22,752 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:53:22,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:53:22,753 INFO L85 PathProgramCache]: Analyzing trace with hash 57376236, now seen corresponding path program 1 times [2021-11-20 05:53:22,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:53:22,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719596186] [2021-11-20 05:53:22,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:53:22,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:53:22,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:22,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 05:53:22,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:23,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 05:53:23,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:23,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 05:53:23,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:23,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:53:23,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:23,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 05:53:23,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:23,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:53:23,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:23,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 05:53:23,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:23,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-20 05:53:23,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:23,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-20 05:53:23,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:23,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-20 05:53:23,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:23,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-20 05:53:23,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:23,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-20 05:53:23,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:23,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-20 05:53:23,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:23,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-11-20 05:53:23,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:23,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-11-20 05:53:23,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:23,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-11-20 05:53:23,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:23,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:53:23,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:23,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 05:53:23,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:23,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-11-20 05:53:23,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:23,333 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-20 05:53:23,333 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:53:23,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719596186] [2021-11-20 05:53:23,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719596186] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:53:23,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796477640] [2021-11-20 05:53:23,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:53:23,334 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:53:23,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:53:23,340 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:53:23,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 05:53:23,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:23,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 2674 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 05:53:23,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:53:24,374 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-20 05:53:24,375 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 05:53:24,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796477640] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:53:24,375 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 05:53:24,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2021-11-20 05:53:24,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877379379] [2021-11-20 05:53:24,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:53:24,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 05:53:24,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:53:24,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 05:53:24,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-20 05:53:24,382 INFO L87 Difference]: Start difference. First operand 138 states and 184 transitions. Second operand has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 3 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-20 05:53:24,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:53:24,723 INFO L93 Difference]: Finished difference Result 272 states and 367 transitions. [2021-11-20 05:53:24,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 05:53:24,724 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 3 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 113 [2021-11-20 05:53:24,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:53:24,731 INFO L225 Difference]: With dead ends: 272 [2021-11-20 05:53:24,732 INFO L226 Difference]: Without dead ends: 141 [2021-11-20 05:53:24,734 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-20 05:53:24,744 INFO L933 BasicCegarLoop]: 147 mSDtfsCounter, 196 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:53:24,745 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 415 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 05:53:24,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-11-20 05:53:24,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2021-11-20 05:53:24,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 85 states have (on average 1.2117647058823529) internal successors, (103), 87 states have internal predecessors, (103), 42 states have call successors, (42), 12 states have call predecessors, (42), 13 states have return successors, (47), 41 states have call predecessors, (47), 41 states have call successors, (47) [2021-11-20 05:53:24,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 192 transitions. [2021-11-20 05:53:24,777 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 192 transitions. Word has length 113 [2021-11-20 05:53:24,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:53:24,778 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 192 transitions. [2021-11-20 05:53:24,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 3 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-20 05:53:24,779 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 192 transitions. [2021-11-20 05:53:24,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-20 05:53:24,781 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:53:24,781 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 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, 1, 1, 1, 1, 1, 1] [2021-11-20 05:53:24,812 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-20 05:53:24,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:53:24,991 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:53:24,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:53:24,992 INFO L85 PathProgramCache]: Analyzing trace with hash -590863305, now seen corresponding path program 1 times [2021-11-20 05:53:24,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:53:24,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431119931] [2021-11-20 05:53:24,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:53:24,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:53:25,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:25,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 05:53:25,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:25,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 05:53:25,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:25,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 05:53:25,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:25,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:53:25,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:25,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 05:53:25,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:25,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:53:25,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:25,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 05:53:25,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:25,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-20 05:53:25,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:25,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-20 05:53:25,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:25,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-20 05:53:25,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:25,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-20 05:53:25,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:25,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-20 05:53:25,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:25,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-11-20 05:53:25,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:25,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-11-20 05:53:25,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:25,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-11-20 05:53:25,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:25,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-11-20 05:53:25,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:25,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:53:25,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:25,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 05:53:25,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:25,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-11-20 05:53:25,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:25,896 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-11-20 05:53:25,897 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:53:25,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431119931] [2021-11-20 05:53:25,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431119931] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:53:25,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814086221] [2021-11-20 05:53:25,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:53:25,900 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:53:25,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:53:25,901 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:53:25,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 05:53:26,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:26,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 2691 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 05:53:26,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:53:26,980 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-20 05:53:26,980 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 05:53:26,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814086221] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:53:26,981 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 05:53:26,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [12] total 17 [2021-11-20 05:53:26,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650734370] [2021-11-20 05:53:26,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:53:26,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 05:53:26,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:53:26,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 05:53:26,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-11-20 05:53:26,983 INFO L87 Difference]: Start difference. First operand 141 states and 192 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, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 3 states have call predecessors, (19), 4 states have call successors, (19) [2021-11-20 05:53:27,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:53:27,333 INFO L93 Difference]: Finished difference Result 227 states and 311 transitions. [2021-11-20 05:53:27,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 05:53:27,333 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, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 3 states have call predecessors, (19), 4 states have call successors, (19) Word has length 119 [2021-11-20 05:53:27,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:53:27,336 INFO L225 Difference]: With dead ends: 227 [2021-11-20 05:53:27,336 INFO L226 Difference]: Without dead ends: 141 [2021-11-20 05:53:27,338 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-11-20 05:53:27,339 INFO L933 BasicCegarLoop]: 146 mSDtfsCounter, 203 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 05:53:27,339 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 550 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 05:53:27,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-11-20 05:53:27,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2021-11-20 05:53:27,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 85 states have (on average 1.2117647058823529) internal successors, (103), 87 states have internal predecessors, (103), 42 states have call successors, (42), 12 states have call predecessors, (42), 13 states have return successors, (45), 41 states have call predecessors, (45), 41 states have call successors, (45) [2021-11-20 05:53:27,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 190 transitions. [2021-11-20 05:53:27,359 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 190 transitions. Word has length 119 [2021-11-20 05:53:27,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:53:27,360 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 190 transitions. [2021-11-20 05:53:27,360 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, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 3 states have call predecessors, (19), 4 states have call successors, (19) [2021-11-20 05:53:27,361 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 190 transitions. [2021-11-20 05:53:27,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-20 05:53:27,362 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:53:27,363 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:53:27,404 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 05:53:27,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:53:27,588 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:53:27,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:53:27,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1636756019, now seen corresponding path program 2 times [2021-11-20 05:53:27,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:53:27,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190519167] [2021-11-20 05:53:27,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:53:27,589 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:53:27,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:27,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 05:53:27,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:27,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 05:53:27,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:27,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 05:53:27,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:27,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:53:27,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:27,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 05:53:27,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:27,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:53:27,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:27,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 05:53:27,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:27,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-20 05:53:27,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:27,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-20 05:53:27,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:27,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-20 05:53:27,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:27,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-20 05:53:27,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:27,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-20 05:53:27,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:28,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-11-20 05:53:28,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:28,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-11-20 05:53:28,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:28,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-11-20 05:53:28,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:28,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-11-20 05:53:28,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:28,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:53:28,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:28,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 05:53:28,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:28,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-11-20 05:53:28,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:28,106 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2021-11-20 05:53:28,106 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:53:28,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190519167] [2021-11-20 05:53:28,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190519167] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:53:28,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388349216] [2021-11-20 05:53:28,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 05:53:28,107 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:53:28,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:53:28,108 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:53:28,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 05:53:28,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-20 05:53:28,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:53:28,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 2316 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-20 05:53:28,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:53:28,900 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-11-20 05:53:28,901 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 05:53:28,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388349216] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:53:28,901 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 05:53:28,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 15 [2021-11-20 05:53:28,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153662310] [2021-11-20 05:53:28,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:53:28,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 05:53:28,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:53:28,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 05:53:28,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-11-20 05:53:28,903 INFO L87 Difference]: Start difference. First operand 141 states and 190 transitions. Second operand has 8 states, 7 states have (on average 7.142857142857143) internal successors, (50), 6 states have internal predecessors, (50), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) [2021-11-20 05:53:29,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:53:29,036 INFO L93 Difference]: Finished difference Result 153 states and 209 transitions. [2021-11-20 05:53:29,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 05:53:29,037 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.142857142857143) internal successors, (50), 6 states have internal predecessors, (50), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) Word has length 131 [2021-11-20 05:53:29,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:53:29,040 INFO L225 Difference]: With dead ends: 153 [2021-11-20 05:53:29,040 INFO L226 Difference]: Without dead ends: 151 [2021-11-20 05:53:29,041 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-11-20 05:53:29,042 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 22 mSDsluCounter, 1076 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 1262 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:53:29,042 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 1262 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:53:29,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-11-20 05:53:29,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 150. [2021-11-20 05:53:29,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 91 states have (on average 1.1978021978021978) internal successors, (109), 94 states have internal predecessors, (109), 43 states have call successors, (43), 13 states have call predecessors, (43), 15 states have return successors, (54), 42 states have call predecessors, (54), 42 states have call successors, (54) [2021-11-20 05:53:29,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 206 transitions. [2021-11-20 05:53:29,074 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 206 transitions. Word has length 131 [2021-11-20 05:53:29,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:53:29,076 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 206 transitions. [2021-11-20 05:53:29,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.142857142857143) internal successors, (50), 6 states have internal predecessors, (50), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) [2021-11-20 05:53:29,077 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 206 transitions. [2021-11-20 05:53:29,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-20 05:53:29,079 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:53:29,080 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:53:29,122 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 05:53:29,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:53:29,293 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:53:29,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:53:29,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1157375339, now seen corresponding path program 1 times [2021-11-20 05:53:29,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:53:29,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465305138] [2021-11-20 05:53:29,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:53:29,294 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:53:29,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:29,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 05:53:29,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:29,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 05:53:29,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:29,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 05:53:29,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:29,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:53:29,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:29,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 05:53:29,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:29,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:53:29,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:29,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 05:53:29,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:29,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-20 05:53:29,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:29,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-20 05:53:29,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:29,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-20 05:53:29,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:29,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-20 05:53:29,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:29,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-20 05:53:29,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:29,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-11-20 05:53:29,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:29,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-11-20 05:53:29,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:29,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-11-20 05:53:29,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:29,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-11-20 05:53:29,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:29,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:53:29,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:29,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 05:53:29,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:29,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-11-20 05:53:29,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:29,849 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2021-11-20 05:53:29,850 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:53:29,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465305138] [2021-11-20 05:53:29,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465305138] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:53:29,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039222842] [2021-11-20 05:53:29,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:53:29,851 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:53:29,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:53:29,856 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:53:29,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 05:53:30,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:30,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 2737 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 05:53:30,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:53:30,832 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-20 05:53:30,832 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 05:53:30,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039222842] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:53:30,832 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 05:53:30,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 14 [2021-11-20 05:53:30,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026224851] [2021-11-20 05:53:30,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:53:30,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 05:53:30,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:53:30,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 05:53:30,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-11-20 05:53:30,836 INFO L87 Difference]: Start difference. First operand 150 states and 206 transitions. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 4 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2021-11-20 05:53:31,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:53:31,117 INFO L93 Difference]: Finished difference Result 260 states and 358 transitions. [2021-11-20 05:53:31,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 05:53:31,118 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 4 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) Word has length 135 [2021-11-20 05:53:31,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:53:31,124 INFO L225 Difference]: With dead ends: 260 [2021-11-20 05:53:31,125 INFO L226 Difference]: Without dead ends: 147 [2021-11-20 05:53:31,126 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-11-20 05:53:31,128 INFO L933 BasicCegarLoop]: 146 mSDtfsCounter, 202 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:53:31,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 550 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 05:53:31,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-11-20 05:53:31,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2021-11-20 05:53:31,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 89 states have (on average 1.1910112359550562) internal successors, (106), 91 states have internal predecessors, (106), 43 states have call successors, (43), 13 states have call predecessors, (43), 14 states have return successors, (50), 42 states have call predecessors, (50), 42 states have call successors, (50) [2021-11-20 05:53:31,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 199 transitions. [2021-11-20 05:53:31,163 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 199 transitions. Word has length 135 [2021-11-20 05:53:31,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:53:31,168 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 199 transitions. [2021-11-20 05:53:31,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 4 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2021-11-20 05:53:31,169 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 199 transitions. [2021-11-20 05:53:31,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-20 05:53:31,172 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:53:31,172 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 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, 1, 1, 1, 1] [2021-11-20 05:53:31,210 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 05:53:31,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:53:31,400 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:53:31,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:53:31,400 INFO L85 PathProgramCache]: Analyzing trace with hash 707842976, now seen corresponding path program 1 times [2021-11-20 05:53:31,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:53:31,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000728789] [2021-11-20 05:53:31,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:53:31,401 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:53:31,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:31,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 05:53:31,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:31,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 05:53:31,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:31,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 05:53:31,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:31,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:53:31,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:31,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 05:53:31,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:31,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:53:31,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:31,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 05:53:31,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:31,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-20 05:53:31,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:31,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-20 05:53:31,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:31,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-20 05:53:31,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:31,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-20 05:53:31,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:31,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-20 05:53:31,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:31,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-11-20 05:53:31,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:31,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-11-20 05:53:31,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:31,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-11-20 05:53:31,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:32,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-11-20 05:53:32,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:32,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:53:32,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:32,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 05:53:32,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:32,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-11-20 05:53:32,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:32,139 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2021-11-20 05:53:32,139 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:53:32,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000728789] [2021-11-20 05:53:32,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000728789] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:53:32,140 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:53:32,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-20 05:53:32,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61429410] [2021-11-20 05:53:32,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:53:32,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 05:53:32,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:53:32,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 05:53:32,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-20 05:53:32,143 INFO L87 Difference]: Start difference. First operand 147 states and 199 transitions. Second operand has 8 states, 8 states have (on average 7.25) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (20), 5 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) [2021-11-20 05:53:32,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:53:32,911 INFO L93 Difference]: Finished difference Result 314 states and 443 transitions. [2021-11-20 05:53:32,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 05:53:32,912 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (20), 5 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) Word has length 141 [2021-11-20 05:53:32,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:53:32,915 INFO L225 Difference]: With dead ends: 314 [2021-11-20 05:53:32,915 INFO L226 Difference]: Without dead ends: 174 [2021-11-20 05:53:32,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-11-20 05:53:32,917 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 242 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 05:53:32,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 350 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-20 05:53:32,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-11-20 05:53:32,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 152. [2021-11-20 05:53:32,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 94 states have (on average 1.202127659574468) internal successors, (113), 96 states have internal predecessors, (113), 43 states have call successors, (43), 13 states have call predecessors, (43), 14 states have return successors, (50), 42 states have call predecessors, (50), 42 states have call successors, (50) [2021-11-20 05:53:32,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 206 transitions. [2021-11-20 05:53:32,950 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 206 transitions. Word has length 141 [2021-11-20 05:53:32,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:53:32,951 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 206 transitions. [2021-11-20 05:53:32,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (20), 5 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) [2021-11-20 05:53:32,952 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 206 transitions. [2021-11-20 05:53:32,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-20 05:53:32,955 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:53:32,955 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 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, 1, 1, 1, 1] [2021-11-20 05:53:32,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-20 05:53:32,956 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:53:32,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:53:32,956 INFO L85 PathProgramCache]: Analyzing trace with hash 966008414, now seen corresponding path program 1 times [2021-11-20 05:53:32,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:53:32,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885096618] [2021-11-20 05:53:32,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:53:32,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:53:33,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:33,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 05:53:33,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:33,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 05:53:33,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:33,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 05:53:33,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:33,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:53:33,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:33,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 05:53:33,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:33,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:53:33,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:33,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 05:53:33,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:33,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-20 05:53:33,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:33,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-20 05:53:33,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:33,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-20 05:53:33,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:33,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-20 05:53:33,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:33,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-20 05:53:33,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:33,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-11-20 05:53:33,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:33,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-11-20 05:53:33,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:33,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-11-20 05:53:33,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:33,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-11-20 05:53:33,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:34,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:53:34,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:34,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 05:53:34,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:34,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-11-20 05:53:34,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:34,130 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 20 proven. 20 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-11-20 05:53:34,130 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:53:34,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885096618] [2021-11-20 05:53:34,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885096618] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:53:34,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077159866] [2021-11-20 05:53:34,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:53:34,131 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:53:34,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:53:34,132 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:53:34,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 05:53:34,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:34,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 2749 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-20 05:53:34,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:53:34,881 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 05:53:35,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:53:35,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 39 [2021-11-20 05:53:35,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:53:35,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 38 [2021-11-20 05:53:35,470 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 05:53:35,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 23 [2021-11-20 05:53:36,503 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 120 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-20 05:53:36,503 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 05:53:36,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077159866] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:53:36,504 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 05:53:36,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [16] total 31 [2021-11-20 05:53:36,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411160047] [2021-11-20 05:53:36,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:53:36,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-20 05:53:36,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:53:36,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-20 05:53:36,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=850, Unknown=0, NotChecked=0, Total=930 [2021-11-20 05:53:36,506 INFO L87 Difference]: Start difference. First operand 152 states and 206 transitions. Second operand has 17 states, 16 states have (on average 4.8125) internal successors, (77), 16 states have internal predecessors, (77), 8 states have call successors, (20), 4 states have call predecessors, (20), 7 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) [2021-11-20 05:53:37,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:53:37,639 INFO L93 Difference]: Finished difference Result 334 states and 473 transitions. [2021-11-20 05:53:37,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-20 05:53:37,640 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 4.8125) internal successors, (77), 16 states have internal predecessors, (77), 8 states have call successors, (20), 4 states have call predecessors, (20), 7 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) Word has length 141 [2021-11-20 05:53:37,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:53:37,643 INFO L225 Difference]: With dead ends: 334 [2021-11-20 05:53:37,643 INFO L226 Difference]: Without dead ends: 240 [2021-11-20 05:53:37,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 159 SyntacticMatches, 10 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=125, Invalid=1357, Unknown=0, NotChecked=0, Total=1482 [2021-11-20 05:53:37,646 INFO L933 BasicCegarLoop]: 216 mSDtfsCounter, 115 mSDsluCounter, 943 mSDsCounter, 0 mSdLazyCounter, 824 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 1159 SdHoareTripleChecker+Invalid, 1574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 824 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 669 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-20 05:53:37,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 1159 Invalid, 1574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 824 Invalid, 0 Unknown, 669 Unchecked, 0.9s Time] [2021-11-20 05:53:37,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-11-20 05:53:37,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 193. [2021-11-20 05:53:37,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 125 states have (on average 1.208) internal successors, (151), 130 states have internal predecessors, (151), 48 states have call successors, (48), 16 states have call predecessors, (48), 19 states have return successors, (63), 46 states have call predecessors, (63), 47 states have call successors, (63) [2021-11-20 05:53:37,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 262 transitions. [2021-11-20 05:53:37,691 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 262 transitions. Word has length 141 [2021-11-20 05:53:37,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:53:37,693 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 262 transitions. [2021-11-20 05:53:37,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 4.8125) internal successors, (77), 16 states have internal predecessors, (77), 8 states have call successors, (20), 4 states have call predecessors, (20), 7 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) [2021-11-20 05:53:37,693 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 262 transitions. [2021-11-20 05:53:37,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-20 05:53:37,697 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:53:37,697 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:53:37,738 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 05:53:37,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-20 05:53:37,924 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:53:37,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:53:37,925 INFO L85 PathProgramCache]: Analyzing trace with hash 950489696, now seen corresponding path program 1 times [2021-11-20 05:53:37,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:53:37,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228409396] [2021-11-20 05:53:37,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:53:37,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:53:38,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:38,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 05:53:38,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:38,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 05:53:38,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:38,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 05:53:38,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:38,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:53:38,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:38,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 05:53:38,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:38,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:53:38,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:38,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 05:53:38,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:38,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-20 05:53:38,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:38,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-20 05:53:38,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:38,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-20 05:53:38,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:38,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-20 05:53:38,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:38,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-20 05:53:38,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:38,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-11-20 05:53:38,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:38,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-11-20 05:53:38,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:38,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-11-20 05:53:38,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:38,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-11-20 05:53:38,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:38,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:53:38,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:38,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 05:53:38,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:38,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-11-20 05:53:38,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:38,329 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2021-11-20 05:53:38,329 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:53:38,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228409396] [2021-11-20 05:53:38,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228409396] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:53:38,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515470835] [2021-11-20 05:53:38,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:53:38,330 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:53:38,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:53:38,331 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:53:38,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 05:53:38,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:38,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 2744 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 05:53:38,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:53:39,089 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-11-20 05:53:39,089 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 05:53:39,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515470835] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:53:39,090 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 05:53:39,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 7 [2021-11-20 05:53:39,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250062765] [2021-11-20 05:53:39,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:53:39,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:53:39,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:53:39,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:53:39,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-20 05:53:39,093 INFO L87 Difference]: Start difference. First operand 193 states and 262 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, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-20 05:53:39,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:53:39,137 INFO L93 Difference]: Finished difference Result 388 states and 533 transitions. [2021-11-20 05:53:39,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 05:53:39,138 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, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 141 [2021-11-20 05:53:39,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:53:39,142 INFO L225 Difference]: With dead ends: 388 [2021-11-20 05:53:39,142 INFO L226 Difference]: Without dead ends: 202 [2021-11-20 05:53:39,144 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-20 05:53:39,145 INFO L933 BasicCegarLoop]: 194 mSDtfsCounter, 20 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 541 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 05:53:39,146 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 541 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:53:39,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-11-20 05:53:39,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 189. [2021-11-20 05:53:39,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 122 states have (on average 1.1967213114754098) internal successors, (146), 126 states have internal predecessors, (146), 48 states have call successors, (48), 16 states have call predecessors, (48), 18 states have return successors, (60), 46 states have call predecessors, (60), 47 states have call successors, (60) [2021-11-20 05:53:39,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 254 transitions. [2021-11-20 05:53:39,173 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 254 transitions. Word has length 141 [2021-11-20 05:53:39,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:53:39,174 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 254 transitions. [2021-11-20 05:53:39,174 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, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-20 05:53:39,175 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 254 transitions. [2021-11-20 05:53:39,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-20 05:53:39,179 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:53:39,180 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:53:39,223 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-20 05:53:39,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:53:39,408 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:53:39,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:53:39,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1956640216, now seen corresponding path program 1 times [2021-11-20 05:53:39,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:53:39,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046496711] [2021-11-20 05:53:39,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:53:39,409 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:53:39,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:39,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 05:53:39,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:39,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 05:53:39,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:39,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 05:53:39,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:39,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:53:39,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:39,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 05:53:39,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:40,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:53:40,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:40,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 05:53:40,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:40,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-20 05:53:40,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:40,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-20 05:53:40,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:40,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-20 05:53:40,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:40,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-20 05:53:40,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:40,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 05:53:40,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:40,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-11-20 05:53:40,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:40,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-11-20 05:53:40,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:40,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-11-20 05:53:40,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:40,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-11-20 05:53:40,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:40,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-11-20 05:53:40,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:40,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:53:40,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:40,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 05:53:40,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:40,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2021-11-20 05:53:40,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:40,553 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 20 proven. 20 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-11-20 05:53:40,553 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:53:40,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046496711] [2021-11-20 05:53:40,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046496711] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:53:40,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482160955] [2021-11-20 05:53:40,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:53:40,554 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:53:40,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:53:40,556 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:53:40,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 05:53:41,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:41,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 2770 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-20 05:53:41,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:53:41,821 INFO L354 Elim1Store]: treesize reduction 453, result has 16.9 percent of original size [2021-11-20 05:53:41,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 103 [2021-11-20 05:53:42,536 INFO L354 Elim1Store]: treesize reduction 36, result has 42.9 percent of original size [2021-11-20 05:53:42,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 103 treesize of output 99 [2021-11-20 05:53:42,878 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 108 proven. 8 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-11-20 05:53:42,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:53:43,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482160955] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:53:43,571 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:53:43,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-11-20 05:53:43,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991335672] [2021-11-20 05:53:43,575 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:53:43,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-20 05:53:43,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:53:43,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-20 05:53:43,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=687, Unknown=0, NotChecked=0, Total=756 [2021-11-20 05:53:43,577 INFO L87 Difference]: Start difference. First operand 189 states and 254 transitions. Second operand has 24 states, 22 states have (on average 5.045454545454546) internal successors, (111), 20 states have internal predecessors, (111), 11 states have call successors, (39), 7 states have call predecessors, (39), 7 states have return successors, (37), 9 states have call predecessors, (37), 11 states have call successors, (37) [2021-11-20 05:53:46,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:53:46,731 INFO L93 Difference]: Finished difference Result 406 states and 588 transitions. [2021-11-20 05:53:46,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-20 05:53:46,731 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 5.045454545454546) internal successors, (111), 20 states have internal predecessors, (111), 11 states have call successors, (39), 7 states have call predecessors, (39), 7 states have return successors, (37), 9 states have call predecessors, (37), 11 states have call successors, (37) Word has length 148 [2021-11-20 05:53:46,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:53:46,735 INFO L225 Difference]: With dead ends: 406 [2021-11-20 05:53:46,735 INFO L226 Difference]: Without dead ends: 303 [2021-11-20 05:53:46,737 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 267 SyntacticMatches, 6 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=252, Invalid=1728, Unknown=0, NotChecked=0, Total=1980 [2021-11-20 05:53:46,738 INFO L933 BasicCegarLoop]: 154 mSDtfsCounter, 629 mSDsluCounter, 979 mSDsCounter, 0 mSdLazyCounter, 2170 mSolverCounterSat, 295 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 681 SdHoareTripleChecker+Valid, 1133 SdHoareTripleChecker+Invalid, 3028 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 295 IncrementalHoareTripleChecker+Valid, 2170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 563 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:53:46,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [681 Valid, 1133 Invalid, 3028 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [295 Valid, 2170 Invalid, 0 Unknown, 563 Unchecked, 2.2s Time] [2021-11-20 05:53:46,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-11-20 05:53:46,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 248. [2021-11-20 05:53:46,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 160 states have (on average 1.19375) internal successors, (191), 165 states have internal predecessors, (191), 65 states have call successors, (65), 19 states have call predecessors, (65), 22 states have return successors, (96), 63 states have call predecessors, (96), 64 states have call successors, (96) [2021-11-20 05:53:46,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 352 transitions. [2021-11-20 05:53:46,769 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 352 transitions. Word has length 148 [2021-11-20 05:53:46,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:53:46,770 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 352 transitions. [2021-11-20 05:53:46,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 5.045454545454546) internal successors, (111), 20 states have internal predecessors, (111), 11 states have call successors, (39), 7 states have call predecessors, (39), 7 states have return successors, (37), 9 states have call predecessors, (37), 11 states have call successors, (37) [2021-11-20 05:53:46,771 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 352 transitions. [2021-11-20 05:53:46,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-20 05:53:46,774 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:53:46,774 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:53:46,806 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-20 05:53:46,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:53:46,984 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:53:46,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:53:46,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1838108774, now seen corresponding path program 2 times [2021-11-20 05:53:46,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:53:46,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498669864] [2021-11-20 05:53:46,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:53:46,985 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:53:47,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:47,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 05:53:47,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:47,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 05:53:47,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:47,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 05:53:47,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:47,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:53:47,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:47,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 05:53:47,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:47,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:53:47,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:47,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 05:53:47,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:47,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-20 05:53:47,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:47,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-20 05:53:47,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:47,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-20 05:53:47,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:47,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-20 05:53:47,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:47,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-20 05:53:47,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:47,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-11-20 05:53:47,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:47,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-11-20 05:53:47,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:47,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-11-20 05:53:47,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:47,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-11-20 05:53:47,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:47,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:53:47,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:48,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 05:53:48,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:48,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-11-20 05:53:48,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:48,024 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-11-20 05:53:48,024 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:53:48,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498669864] [2021-11-20 05:53:48,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498669864] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:53:48,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874159858] [2021-11-20 05:53:48,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 05:53:48,025 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:53:48,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:53:48,026 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:53:48,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-20 05:53:49,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 05:53:49,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:53:49,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 2751 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-20 05:53:49,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:53:49,714 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 97 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-20 05:53:49,714 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 05:53:49,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874159858] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:53:49,714 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 05:53:49,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [20] total 27 [2021-11-20 05:53:49,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778305722] [2021-11-20 05:53:49,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:53:49,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 05:53:49,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:53:49,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 05:53:49,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=634, Unknown=0, NotChecked=0, Total=702 [2021-11-20 05:53:49,717 INFO L87 Difference]: Start difference. First operand 248 states and 352 transitions. Second operand has 9 states, 8 states have (on average 9.25) internal successors, (74), 8 states have internal predecessors, (74), 3 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-20 05:53:49,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:53:49,906 INFO L93 Difference]: Finished difference Result 394 states and 577 transitions. [2021-11-20 05:53:49,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 05:53:49,907 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 9.25) internal successors, (74), 8 states have internal predecessors, (74), 3 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 145 [2021-11-20 05:53:49,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:53:49,911 INFO L225 Difference]: With dead ends: 394 [2021-11-20 05:53:49,911 INFO L226 Difference]: Without dead ends: 258 [2021-11-20 05:53:49,913 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=82, Invalid=788, Unknown=0, NotChecked=0, Total=870 [2021-11-20 05:53:49,915 INFO L933 BasicCegarLoop]: 181 mSDtfsCounter, 12 mSDsluCounter, 1214 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1395 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 05:53:49,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 1395 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:53:49,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-11-20 05:53:49,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 258. [2021-11-20 05:53:49,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 168 states have (on average 1.1845238095238095) internal successors, (199), 175 states have internal predecessors, (199), 65 states have call successors, (65), 19 states have call predecessors, (65), 24 states have return successors, (115), 63 states have call predecessors, (115), 64 states have call successors, (115) [2021-11-20 05:53:49,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 379 transitions. [2021-11-20 05:53:49,953 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 379 transitions. Word has length 145 [2021-11-20 05:53:49,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:53:49,953 INFO L470 AbstractCegarLoop]: Abstraction has 258 states and 379 transitions. [2021-11-20 05:53:49,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 9.25) internal successors, (74), 8 states have internal predecessors, (74), 3 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-20 05:53:49,954 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 379 transitions. [2021-11-20 05:53:49,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-20 05:53:49,957 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:53:49,957 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:53:49,998 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-20 05:53:50,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-20 05:53:50,172 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:53:50,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:53:50,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1846455793, now seen corresponding path program 1 times [2021-11-20 05:53:50,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:53:50,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136047955] [2021-11-20 05:53:50,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:53:50,173 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:53:50,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:50,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 05:53:50,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:50,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 05:53:50,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:50,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 05:53:50,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:50,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:53:50,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:50,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 05:53:50,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:50,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:53:50,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:50,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 05:53:50,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:50,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-20 05:53:50,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:50,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-20 05:53:50,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:50,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-20 05:53:50,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:50,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-20 05:53:50,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:50,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-20 05:53:50,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:50,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-11-20 05:53:50,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:50,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-11-20 05:53:50,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:50,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-11-20 05:53:50,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:50,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-11-20 05:53:50,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:50,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:53:50,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:50,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 05:53:50,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:50,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-11-20 05:53:50,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:50,515 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2021-11-20 05:53:50,515 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:53:50,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136047955] [2021-11-20 05:53:50,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136047955] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:53:50,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356422507] [2021-11-20 05:53:50,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:53:50,516 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:53:50,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:53:50,520 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:53:50,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-20 05:53:50,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:50,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 2763 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 05:53:51,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:53:51,262 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-11-20 05:53:51,262 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 05:53:51,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356422507] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:53:51,263 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 05:53:51,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 7 [2021-11-20 05:53:51,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500767234] [2021-11-20 05:53:51,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:53:51,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:53:51,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:53:51,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:53:51,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-20 05:53:51,265 INFO L87 Difference]: Start difference. First operand 258 states and 379 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-20 05:53:51,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:53:51,304 INFO L93 Difference]: Finished difference Result 519 states and 782 transitions. [2021-11-20 05:53:51,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 05:53:51,305 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 151 [2021-11-20 05:53:51,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:53:51,308 INFO L225 Difference]: With dead ends: 519 [2021-11-20 05:53:51,308 INFO L226 Difference]: Without dead ends: 268 [2021-11-20 05:53:51,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-20 05:53:51,311 INFO L933 BasicCegarLoop]: 182 mSDtfsCounter, 9 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 537 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 05:53:51,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 537 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:53:51,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-11-20 05:53:51,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 262. [2021-11-20 05:53:51,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 172 states have (on average 1.180232558139535) internal successors, (203), 179 states have internal predecessors, (203), 65 states have call successors, (65), 19 states have call predecessors, (65), 24 states have return successors, (115), 63 states have call predecessors, (115), 64 states have call successors, (115) [2021-11-20 05:53:51,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 383 transitions. [2021-11-20 05:53:51,384 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 383 transitions. Word has length 151 [2021-11-20 05:53:51,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:53:51,384 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 383 transitions. [2021-11-20 05:53:51,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-20 05:53:51,385 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 383 transitions. [2021-11-20 05:53:51,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-20 05:53:51,389 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:53:51,389 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:53:51,433 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-20 05:53:51,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:53:51,604 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:53:51,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:53:51,604 INFO L85 PathProgramCache]: Analyzing trace with hash 589693871, now seen corresponding path program 1 times [2021-11-20 05:53:51,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:53:51,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973683779] [2021-11-20 05:53:51,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:53:51,605 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:53:51,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:52,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 05:53:52,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:52,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 05:53:52,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:52,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 05:53:52,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:52,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:53:52,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:52,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 05:53:52,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:52,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:53:52,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:52,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 05:53:52,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:52,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-20 05:53:52,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:52,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-20 05:53:52,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:52,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-20 05:53:52,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:52,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-20 05:53:52,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:52,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-20 05:53:52,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:52,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-11-20 05:53:52,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:52,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-11-20 05:53:52,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:52,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-11-20 05:53:52,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:52,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-11-20 05:53:52,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:52,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:53:52,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:52,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 05:53:52,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:52,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-11-20 05:53:52,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:52,791 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-11-20 05:53:52,791 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:53:52,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973683779] [2021-11-20 05:53:52,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973683779] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:53:52,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739694851] [2021-11-20 05:53:52,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:53:52,792 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:53:52,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:53:52,793 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:53:52,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-20 05:53:53,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:53,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 2758 conjuncts, 64 conjunts are in the unsatisfiable core [2021-11-20 05:53:53,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:53:53,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-20 05:53:54,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:53:54,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:53:54,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 59 [2021-11-20 05:53:54,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:53:54,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:53:54,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:53:54,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:53:54,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 47 [2021-11-20 05:53:58,876 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-20 05:53:58,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 28 [2021-11-20 05:53:59,131 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 74 proven. 44 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-20 05:53:59,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:54:11,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739694851] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:54:11,593 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:54:11,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17] total 33 [2021-11-20 05:54:11,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710597933] [2021-11-20 05:54:11,594 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:54:11,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-20 05:54:11,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:54:11,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-20 05:54:11,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1349, Unknown=5, NotChecked=0, Total=1482 [2021-11-20 05:54:11,596 INFO L87 Difference]: Start difference. First operand 262 states and 383 transitions. Second operand has 33 states, 27 states have (on average 4.703703703703703) internal successors, (127), 30 states have internal predecessors, (127), 16 states have call successors, (37), 8 states have call predecessors, (37), 9 states have return successors, (35), 11 states have call predecessors, (35), 16 states have call successors, (35) [2021-11-20 05:55:01,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:55:01,401 INFO L93 Difference]: Finished difference Result 719 states and 1180 transitions. [2021-11-20 05:55:01,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-11-20 05:55:01,403 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 27 states have (on average 4.703703703703703) internal successors, (127), 30 states have internal predecessors, (127), 16 states have call successors, (37), 8 states have call predecessors, (37), 9 states have return successors, (35), 11 states have call predecessors, (35), 16 states have call successors, (35) Word has length 147 [2021-11-20 05:55:01,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:55:01,413 INFO L225 Difference]: With dead ends: 719 [2021-11-20 05:55:01,413 INFO L226 Difference]: Without dead ends: 602 [2021-11-20 05:55:01,418 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 265 SyntacticMatches, 20 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2350 ImplicationChecksByTransitivity, 60.8s TimeCoverageRelationStatistics Valid=783, Invalid=6505, Unknown=22, NotChecked=0, Total=7310 [2021-11-20 05:55:01,419 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 722 mSDsluCounter, 1175 mSDsCounter, 0 mSdLazyCounter, 3831 mSolverCounterSat, 605 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 791 SdHoareTripleChecker+Valid, 1379 SdHoareTripleChecker+Invalid, 5331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 605 IncrementalHoareTripleChecker+Valid, 3831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 895 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2021-11-20 05:55:01,420 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [791 Valid, 1379 Invalid, 5331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [605 Valid, 3831 Invalid, 0 Unknown, 895 Unchecked, 4.8s Time] [2021-11-20 05:55:01,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2021-11-20 05:55:01,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 371. [2021-11-20 05:55:01,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 253 states have (on average 1.1778656126482214) internal successors, (298), 265 states have internal predecessors, (298), 85 states have call successors, (85), 22 states have call predecessors, (85), 32 states have return successors, (159), 83 states have call predecessors, (159), 84 states have call successors, (159) [2021-11-20 05:55:01,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 542 transitions. [2021-11-20 05:55:01,480 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 542 transitions. Word has length 147 [2021-11-20 05:55:01,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:55:01,482 INFO L470 AbstractCegarLoop]: Abstraction has 371 states and 542 transitions. [2021-11-20 05:55:01,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 27 states have (on average 4.703703703703703) internal successors, (127), 30 states have internal predecessors, (127), 16 states have call successors, (37), 8 states have call predecessors, (37), 9 states have return successors, (35), 11 states have call predecessors, (35), 16 states have call successors, (35) [2021-11-20 05:55:01,483 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 542 transitions. [2021-11-20 05:55:01,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-20 05:55:01,487 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:55:01,488 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:55:01,521 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-20 05:55:01,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-20 05:55:01,708 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:55:01,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:55:01,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1569033013, now seen corresponding path program 2 times [2021-11-20 05:55:01,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:55:01,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545188382] [2021-11-20 05:55:01,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:55:01,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:55:01,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:01,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 05:55:01,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:01,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 05:55:01,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:01,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 05:55:01,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:01,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:55:01,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:01,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 05:55:01,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:01,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:55:01,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:01,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 05:55:01,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:01,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-20 05:55:01,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:01,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-20 05:55:01,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:01,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-20 05:55:01,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:01,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-20 05:55:01,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:01,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-20 05:55:01,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:02,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-11-20 05:55:02,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:02,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-11-20 05:55:02,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:02,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-11-20 05:55:02,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:02,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-11-20 05:55:02,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:02,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:55:02,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:02,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 05:55:02,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:02,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-11-20 05:55:02,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:02,132 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2021-11-20 05:55:02,132 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:55:02,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545188382] [2021-11-20 05:55:02,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545188382] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:55:02,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442121678] [2021-11-20 05:55:02,133 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 05:55:02,133 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:55:02,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:55:02,134 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:55:02,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-20 05:55:03,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 05:55:03,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:55:03,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 2765 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 05:55:03,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:55:04,019 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-20 05:55:04,019 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 05:55:04,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442121678] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:55:04,020 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 05:55:04,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 7 [2021-11-20 05:55:04,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269059819] [2021-11-20 05:55:04,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:55:04,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:55:04,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:55:04,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:55:04,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-20 05:55:04,022 INFO L87 Difference]: Start difference. First operand 371 states and 542 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-20 05:55:04,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:55:04,080 INFO L93 Difference]: Finished difference Result 695 states and 1036 transitions. [2021-11-20 05:55:04,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 05:55:04,081 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 151 [2021-11-20 05:55:04,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:55:04,086 INFO L225 Difference]: With dead ends: 695 [2021-11-20 05:55:04,086 INFO L226 Difference]: Without dead ends: 344 [2021-11-20 05:55:04,090 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-20 05:55:04,091 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 26 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 549 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:55:04,092 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 549 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:55:04,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-11-20 05:55:04,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 332. [2021-11-20 05:55:04,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 220 states have (on average 1.1454545454545455) internal successors, (252), 229 states have internal predecessors, (252), 82 states have call successors, (82), 22 states have call predecessors, (82), 29 states have return successors, (131), 80 states have call predecessors, (131), 81 states have call successors, (131) [2021-11-20 05:55:04,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 465 transitions. [2021-11-20 05:55:04,130 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 465 transitions. Word has length 151 [2021-11-20 05:55:04,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:55:04,131 INFO L470 AbstractCegarLoop]: Abstraction has 332 states and 465 transitions. [2021-11-20 05:55:04,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-20 05:55:04,131 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 465 transitions. [2021-11-20 05:55:04,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-20 05:55:04,136 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:55:04,136 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:55:04,181 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-20 05:55:04,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-20 05:55:04,360 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:55:04,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:55:04,360 INFO L85 PathProgramCache]: Analyzing trace with hash -335903433, now seen corresponding path program 3 times [2021-11-20 05:55:04,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:55:04,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966811350] [2021-11-20 05:55:04,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:55:04,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:55:04,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:04,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 05:55:04,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:04,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 05:55:04,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:04,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 05:55:04,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:04,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:55:04,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:04,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 05:55:04,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:04,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:55:04,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:04,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 05:55:04,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:04,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-20 05:55:04,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:04,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-11-20 05:55:04,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:04,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-11-20 05:55:04,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:04,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-11-20 05:55:04,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:04,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-20 05:55:04,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:04,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-11-20 05:55:04,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:04,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-11-20 05:55:04,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:04,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-11-20 05:55:04,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:04,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-11-20 05:55:04,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:04,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:55:04,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:04,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 05:55:04,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:04,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-11-20 05:55:04,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:04,891 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2021-11-20 05:55:04,891 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:55:04,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966811350] [2021-11-20 05:55:04,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966811350] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:55:04,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267125885] [2021-11-20 05:55:04,892 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 05:55:04,892 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:55:04,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:55:04,896 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:55:04,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-20 05:55:06,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-20 05:55:06,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:55:06,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 2432 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-20 05:55:06,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:55:08,680 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 106 proven. 7 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-20 05:55:08,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:55:09,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267125885] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:55:09,324 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:55:09,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2021-11-20 05:55:09,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467537804] [2021-11-20 05:55:09,325 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:55:09,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-20 05:55:09,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:55:09,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-20 05:55:09,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=955, Unknown=0, NotChecked=0, Total=1056 [2021-11-20 05:55:09,327 INFO L87 Difference]: Start difference. First operand 332 states and 465 transitions. Second operand has 26 states, 24 states have (on average 4.625) internal successors, (111), 20 states have internal predecessors, (111), 7 states have call successors, (34), 7 states have call predecessors, (34), 7 states have return successors, (32), 6 states have call predecessors, (32), 7 states have call successors, (32) [2021-11-20 05:55:12,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:55:12,053 INFO L93 Difference]: Finished difference Result 742 states and 1059 transitions. [2021-11-20 05:55:12,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-20 05:55:12,053 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 4.625) internal successors, (111), 20 states have internal predecessors, (111), 7 states have call successors, (34), 7 states have call predecessors, (34), 7 states have return successors, (32), 6 states have call predecessors, (32), 7 states have call successors, (32) Word has length 151 [2021-11-20 05:55:12,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:55:12,057 INFO L225 Difference]: With dead ends: 742 [2021-11-20 05:55:12,057 INFO L226 Difference]: Without dead ends: 405 [2021-11-20 05:55:12,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 195 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 604 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=394, Invalid=3146, Unknown=0, NotChecked=0, Total=3540 [2021-11-20 05:55:12,063 INFO L933 BasicCegarLoop]: 194 mSDtfsCounter, 106 mSDsluCounter, 1625 mSDsCounter, 0 mSdLazyCounter, 1655 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 1819 SdHoareTripleChecker+Invalid, 3146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 1655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1436 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-20 05:55:12,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 1819 Invalid, 3146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 1655 Invalid, 0 Unknown, 1436 Unchecked, 1.4s Time] [2021-11-20 05:55:12,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2021-11-20 05:55:12,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 375. [2021-11-20 05:55:12,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 248 states have (on average 1.1370967741935485) internal successors, (282), 256 states have internal predecessors, (282), 93 states have call successors, (93), 27 states have call predecessors, (93), 33 states have return successors, (160), 91 states have call predecessors, (160), 92 states have call successors, (160) [2021-11-20 05:55:12,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 535 transitions. [2021-11-20 05:55:12,101 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 535 transitions. Word has length 151 [2021-11-20 05:55:12,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:55:12,101 INFO L470 AbstractCegarLoop]: Abstraction has 375 states and 535 transitions. [2021-11-20 05:55:12,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 4.625) internal successors, (111), 20 states have internal predecessors, (111), 7 states have call successors, (34), 7 states have call predecessors, (34), 7 states have return successors, (32), 6 states have call predecessors, (32), 7 states have call successors, (32) [2021-11-20 05:55:12,102 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 535 transitions. [2021-11-20 05:55:12,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-20 05:55:12,106 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:55:12,107 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:55:12,146 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-20 05:55:12,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-20 05:55:12,324 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:55:12,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:55:12,324 INFO L85 PathProgramCache]: Analyzing trace with hash -92649305, now seen corresponding path program 1 times [2021-11-20 05:55:12,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:55:12,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476731978] [2021-11-20 05:55:12,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:55:12,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:55:12,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:12,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 05:55:12,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:12,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 05:55:12,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:12,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 05:55:12,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:12,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:55:12,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:12,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 05:55:12,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:13,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:55:13,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:13,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 05:55:13,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:13,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-20 05:55:13,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:13,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-20 05:55:13,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:13,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-20 05:55:13,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:13,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 05:55:13,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:13,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-11-20 05:55:13,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:13,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-11-20 05:55:13,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:13,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-11-20 05:55:13,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:13,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-11-20 05:55:13,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:13,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-11-20 05:55:13,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:13,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-11-20 05:55:13,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:14,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:55:14,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:14,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 05:55:14,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:14,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2021-11-20 05:55:14,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:14,055 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 10 proven. 23 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2021-11-20 05:55:14,055 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:55:14,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476731978] [2021-11-20 05:55:14,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476731978] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:55:14,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615383740] [2021-11-20 05:55:14,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:55:14,057 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:55:14,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:55:14,058 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:55:14,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-20 05:55:14,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:14,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 2776 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-20 05:55:14,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:55:14,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-20 05:55:15,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:55:15,311 INFO L354 Elim1Store]: treesize reduction 172, result has 12.2 percent of original size [2021-11-20 05:55:15,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 80 treesize of output 63 [2021-11-20 05:55:15,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:55:15,369 INFO L354 Elim1Store]: treesize reduction 262, result has 11.2 percent of original size [2021-11-20 05:55:15,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 65 treesize of output 51 [2021-11-20 05:55:15,498 INFO L354 Elim1Store]: treesize reduction 62, result has 1.6 percent of original size [2021-11-20 05:55:15,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 55 treesize of output 25 [2021-11-20 05:55:15,850 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 112 proven. 4 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-20 05:55:15,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:55:38,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615383740] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:55:38,601 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:55:38,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 13] total 38 [2021-11-20 05:55:38,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156771440] [2021-11-20 05:55:38,601 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:55:38,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-20 05:55:38,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:55:38,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-20 05:55:38,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1528, Unknown=8, NotChecked=0, Total=1640 [2021-11-20 05:55:38,603 INFO L87 Difference]: Start difference. First operand 375 states and 535 transitions. Second operand has 38 states, 33 states have (on average 3.909090909090909) internal successors, (129), 33 states have internal predecessors, (129), 15 states have call successors, (41), 6 states have call predecessors, (41), 10 states have return successors, (40), 13 states have call predecessors, (40), 15 states have call successors, (40) [2021-11-20 05:55:45,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:55:45,789 INFO L93 Difference]: Finished difference Result 787 states and 1207 transitions. [2021-11-20 05:55:45,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-20 05:55:45,790 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 33 states have (on average 3.909090909090909) internal successors, (129), 33 states have internal predecessors, (129), 15 states have call successors, (41), 6 states have call predecessors, (41), 10 states have return successors, (40), 13 states have call predecessors, (40), 15 states have call successors, (40) Word has length 154 [2021-11-20 05:55:45,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:55:45,798 INFO L225 Difference]: With dead ends: 787 [2021-11-20 05:55:45,798 INFO L226 Difference]: Without dead ends: 575 [2021-11-20 05:55:45,803 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 279 SyntacticMatches, 6 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1167 ImplicationChecksByTransitivity, 25.9s TimeCoverageRelationStatistics Valid=488, Invalid=5356, Unknown=8, NotChecked=0, Total=5852 [2021-11-20 05:55:45,804 INFO L933 BasicCegarLoop]: 142 mSDtfsCounter, 548 mSDsluCounter, 1222 mSDsCounter, 0 mSdLazyCounter, 6160 mSolverCounterSat, 461 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 584 SdHoareTripleChecker+Valid, 1364 SdHoareTripleChecker+Invalid, 7086 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 461 IncrementalHoareTripleChecker+Valid, 6160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 465 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:55:45,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [584 Valid, 1364 Invalid, 7086 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [461 Valid, 6160 Invalid, 0 Unknown, 465 Unchecked, 5.1s Time] [2021-11-20 05:55:45,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2021-11-20 05:55:45,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 490. [2021-11-20 05:55:45,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 321 states have (on average 1.1370716510903427) internal successors, (365), 330 states have internal predecessors, (365), 130 states have call successors, (130), 31 states have call predecessors, (130), 38 states have return successors, (241), 128 states have call predecessors, (241), 129 states have call successors, (241) [2021-11-20 05:55:45,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 736 transitions. [2021-11-20 05:55:45,869 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 736 transitions. Word has length 154 [2021-11-20 05:55:45,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:55:45,870 INFO L470 AbstractCegarLoop]: Abstraction has 490 states and 736 transitions. [2021-11-20 05:55:45,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 33 states have (on average 3.909090909090909) internal successors, (129), 33 states have internal predecessors, (129), 15 states have call successors, (41), 6 states have call predecessors, (41), 10 states have return successors, (40), 13 states have call predecessors, (40), 15 states have call successors, (40) [2021-11-20 05:55:45,871 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 736 transitions. [2021-11-20 05:55:45,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-20 05:55:45,876 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:55:45,876 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:55:45,919 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-20 05:55:46,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-20 05:55:46,100 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:55:46,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:55:46,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1675954745, now seen corresponding path program 4 times [2021-11-20 05:55:46,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:55:46,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226891616] [2021-11-20 05:55:46,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:55:46,101 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:55:46,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:46,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 05:55:46,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:46,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 05:55:46,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:46,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 05:55:46,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:46,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:55:46,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:46,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 05:55:46,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:46,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:55:46,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:46,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 05:55:46,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:46,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-20 05:55:46,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:46,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-20 05:55:46,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:46,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-20 05:55:46,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:46,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-20 05:55:46,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:46,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-20 05:55:46,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:46,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-11-20 05:55:46,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:46,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-11-20 05:55:46,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:46,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-11-20 05:55:46,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:46,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-11-20 05:55:46,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:46,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:55:46,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:46,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 05:55:46,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:46,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-11-20 05:55:46,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:46,614 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 13 proven. 19 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2021-11-20 05:55:46,614 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:55:46,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226891616] [2021-11-20 05:55:46,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226891616] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:55:46,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596139707] [2021-11-20 05:55:46,616 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 05:55:46,617 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:55:46,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:55:46,620 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:55:46,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-20 05:55:46,785 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 05:55:46,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:55:46,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-20 05:55:46,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:55:46,918 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 05:55:47,539 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2021-11-20 05:55:47,539 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 05:55:47,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596139707] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:55:47,540 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 05:55:47,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [12] total 22 [2021-11-20 05:55:47,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046874990] [2021-11-20 05:55:47,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:55:47,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 05:55:47,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:55:47,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 05:55:47,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-11-20 05:55:47,542 INFO L87 Difference]: Start difference. First operand 490 states and 736 transitions. Second operand has 12 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 9 states have internal predecessors, (69), 4 states have call successors, (20), 3 states have call predecessors, (20), 5 states have return successors, (19), 5 states have call predecessors, (19), 4 states have call successors, (19) [2021-11-20 05:55:47,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:55:47,723 INFO L93 Difference]: Finished difference Result 840 states and 1227 transitions. [2021-11-20 05:55:47,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 05:55:47,724 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 9 states have internal predecessors, (69), 4 states have call successors, (20), 3 states have call predecessors, (20), 5 states have return successors, (19), 5 states have call predecessors, (19), 4 states have call successors, (19) Word has length 151 [2021-11-20 05:55:47,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:55:47,728 INFO L225 Difference]: With dead ends: 840 [2021-11-20 05:55:47,729 INFO L226 Difference]: Without dead ends: 418 [2021-11-20 05:55:47,732 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-11-20 05:55:47,733 INFO L933 BasicCegarLoop]: 174 mSDtfsCounter, 18 mSDsluCounter, 823 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 997 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:55:47,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 997 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 58 Unchecked, 0.1s Time] [2021-11-20 05:55:47,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-11-20 05:55:47,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 414. [2021-11-20 05:55:47,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 266 states have (on average 1.1390977443609023) internal successors, (303), 273 states have internal predecessors, (303), 116 states have call successors, (116), 26 states have call predecessors, (116), 31 states have return successors, (221), 114 states have call predecessors, (221), 115 states have call successors, (221) [2021-11-20 05:55:47,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 640 transitions. [2021-11-20 05:55:47,784 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 640 transitions. Word has length 151 [2021-11-20 05:55:47,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:55:47,784 INFO L470 AbstractCegarLoop]: Abstraction has 414 states and 640 transitions. [2021-11-20 05:55:47,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 9 states have internal predecessors, (69), 4 states have call successors, (20), 3 states have call predecessors, (20), 5 states have return successors, (19), 5 states have call predecessors, (19), 4 states have call successors, (19) [2021-11-20 05:55:47,785 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 640 transitions. [2021-11-20 05:55:47,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-11-20 05:55:47,788 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:55:47,789 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:55:47,831 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-20 05:55:48,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:55:48,008 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:55:48,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:55:48,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1504579510, now seen corresponding path program 1 times [2021-11-20 05:55:48,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:55:48,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155203295] [2021-11-20 05:55:48,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:55:48,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:55:48,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:48,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 05:55:48,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:48,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 05:55:48,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:48,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 05:55:48,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:48,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:55:48,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:48,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 05:55:48,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:48,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:55:48,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:48,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 05:55:48,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:48,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-20 05:55:48,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:48,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-20 05:55:48,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:48,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-20 05:55:48,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:48,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-20 05:55:48,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:48,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-11-20 05:55:48,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:48,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-11-20 05:55:48,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:48,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-11-20 05:55:48,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:48,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-11-20 05:55:48,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:48,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-11-20 05:55:48,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:48,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:55:48,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:48,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 05:55:48,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:48,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2021-11-20 05:55:48,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:48,474 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 14 proven. 19 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2021-11-20 05:55:48,474 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:55:48,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155203295] [2021-11-20 05:55:48,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155203295] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:55:48,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891306681] [2021-11-20 05:55:48,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:55:48,475 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:55:48,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:55:48,480 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:55:48,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-20 05:55:48,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:48,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 2774 conjuncts, 65 conjunts are in the unsatisfiable core [2021-11-20 05:55:48,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:55:48,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-20 05:55:49,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:55:49,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:55:49,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 53 [2021-11-20 05:55:49,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:55:49,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:55:49,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:55:49,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:55:49,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 41 [2021-11-20 05:55:57,451 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-20 05:55:57,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-11-20 05:55:57,599 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 82 proven. 54 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-20 05:55:57,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:56:01,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891306681] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:56:01,980 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:56:01,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2021-11-20 05:56:01,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883485970] [2021-11-20 05:56:01,981 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:56:01,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-20 05:56:01,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:56:01,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-20 05:56:01,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=898, Unknown=2, NotChecked=0, Total=992 [2021-11-20 05:56:01,983 INFO L87 Difference]: Start difference. First operand 414 states and 640 transitions. Second operand has 26 states, 23 states have (on average 6.0) internal successors, (138), 22 states have internal predecessors, (138), 10 states have call successors, (37), 8 states have call predecessors, (37), 9 states have return successors, (35), 8 states have call predecessors, (35), 10 states have call successors, (35) [2021-11-20 05:56:09,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:56:09,993 INFO L93 Difference]: Finished difference Result 900 states and 1400 transitions. [2021-11-20 05:56:09,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-11-20 05:56:09,993 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 23 states have (on average 6.0) internal successors, (138), 22 states have internal predecessors, (138), 10 states have call successors, (37), 8 states have call predecessors, (37), 9 states have return successors, (35), 8 states have call predecessors, (35), 10 states have call successors, (35) Word has length 157 [2021-11-20 05:56:09,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:56:10,000 INFO L225 Difference]: With dead ends: 900 [2021-11-20 05:56:10,000 INFO L226 Difference]: Without dead ends: 549 [2021-11-20 05:56:10,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 264 SyntacticMatches, 11 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1103 ImplicationChecksByTransitivity, 16.4s TimeCoverageRelationStatistics Valid=675, Invalid=4577, Unknown=4, NotChecked=0, Total=5256 [2021-11-20 05:56:10,007 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 256 mSDsluCounter, 1651 mSDsCounter, 0 mSdLazyCounter, 3050 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 1837 SdHoareTripleChecker+Invalid, 3847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 3050 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 623 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 05:56:10,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [316 Valid, 1837 Invalid, 3847 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 3050 Invalid, 0 Unknown, 623 Unchecked, 2.3s Time] [2021-11-20 05:56:10,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2021-11-20 05:56:10,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 488. [2021-11-20 05:56:10,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 315 states have (on average 1.126984126984127) internal successors, (355), 324 states have internal predecessors, (355), 133 states have call successors, (133), 32 states have call predecessors, (133), 39 states have return successors, (244), 131 states have call predecessors, (244), 132 states have call successors, (244) [2021-11-20 05:56:10,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 732 transitions. [2021-11-20 05:56:10,094 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 732 transitions. Word has length 157 [2021-11-20 05:56:10,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:56:10,095 INFO L470 AbstractCegarLoop]: Abstraction has 488 states and 732 transitions. [2021-11-20 05:56:10,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 23 states have (on average 6.0) internal successors, (138), 22 states have internal predecessors, (138), 10 states have call successors, (37), 8 states have call predecessors, (37), 9 states have return successors, (35), 8 states have call predecessors, (35), 10 states have call successors, (35) [2021-11-20 05:56:10,095 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 732 transitions. [2021-11-20 05:56:10,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-11-20 05:56:10,100 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:56:10,101 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:56:10,144 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-20 05:56:10,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:56:10,328 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:56:10,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:56:10,328 INFO L85 PathProgramCache]: Analyzing trace with hash 126231492, now seen corresponding path program 1 times [2021-11-20 05:56:10,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:56:10,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884341012] [2021-11-20 05:56:10,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:56:10,329 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:56:10,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:10,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 05:56:10,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:10,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 05:56:10,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:10,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 05:56:10,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:10,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:56:10,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:10,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 05:56:10,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:10,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:56:10,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:10,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 05:56:10,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:10,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-20 05:56:10,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:10,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-20 05:56:10,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:10,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-20 05:56:10,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:10,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-20 05:56:10,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:10,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-11-20 05:56:11,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:11,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-11-20 05:56:11,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:11,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-11-20 05:56:11,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:11,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-11-20 05:56:11,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:11,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-11-20 05:56:11,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:11,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:56:11,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:11,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 05:56:11,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:11,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-11-20 05:56:11,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:11,176 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 4 proven. 57 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-11-20 05:56:11,176 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:56:11,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884341012] [2021-11-20 05:56:11,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884341012] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:56:11,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413562624] [2021-11-20 05:56:11,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:56:11,177 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:56:11,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:56:11,178 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:56:11,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-20 05:56:11,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:11,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 2777 conjuncts, 104 conjunts are in the unsatisfiable core [2021-11-20 05:56:11,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:56:12,406 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 99 treesize of output 95 [2021-11-20 05:56:12,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:56:12,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 05:56:12,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:56:12,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:56:12,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:56:12,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:56:12,433 INFO L354 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2021-11-20 05:56:12,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 81 treesize of output 76 [2021-11-20 05:56:12,436 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 65 treesize of output 61 [2021-11-20 05:56:12,439 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 61 treesize of output 57 [2021-11-20 05:56:12,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 44 [2021-11-20 05:56:15,435 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-20 05:56:15,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 68 treesize of output 44 [2021-11-20 05:56:15,437 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 35 treesize of output 27 [2021-11-20 05:56:15,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-11-20 05:56:15,798 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 55 proven. 96 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-20 05:56:15,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:56:21,534 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 123 treesize of output 117 [2021-11-20 05:56:21,536 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 117 treesize of output 111 [2021-11-20 05:56:21,545 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 109 treesize of output 107 [2021-11-20 05:56:21,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 123 treesize of output 119 [2021-11-20 05:56:21,565 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 119 treesize of output 117 [2021-11-20 05:56:21,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 133 treesize of output 129 [2021-11-20 05:56:21,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413562624] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:56:21,675 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:56:21,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 23] total 40 [2021-11-20 05:56:21,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795679940] [2021-11-20 05:56:21,676 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:56:21,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-20 05:56:21,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:56:21,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-20 05:56:21,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=2786, Unknown=0, NotChecked=0, Total=2970 [2021-11-20 05:56:21,678 INFO L87 Difference]: Start difference. First operand 488 states and 732 transitions. Second operand has 40 states, 35 states have (on average 5.0285714285714285) internal successors, (176), 35 states have internal predecessors, (176), 15 states have call successors, (39), 10 states have call predecessors, (39), 14 states have return successors, (38), 13 states have call predecessors, (38), 15 states have call successors, (38) [2021-11-20 05:56:29,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:56:29,203 INFO L93 Difference]: Finished difference Result 979 states and 1402 transitions. [2021-11-20 05:56:29,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-11-20 05:56:29,204 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 35 states have (on average 5.0285714285714285) internal successors, (176), 35 states have internal predecessors, (176), 15 states have call successors, (39), 10 states have call predecessors, (39), 14 states have return successors, (38), 13 states have call predecessors, (38), 15 states have call successors, (38) Word has length 153 [2021-11-20 05:56:29,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:56:29,209 INFO L225 Difference]: With dead ends: 979 [2021-11-20 05:56:29,209 INFO L226 Difference]: Without dead ends: 676 [2021-11-20 05:56:29,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 251 SyntacticMatches, 10 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3436 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=1100, Invalid=11782, Unknown=0, NotChecked=0, Total=12882 [2021-11-20 05:56:29,215 INFO L933 BasicCegarLoop]: 227 mSDtfsCounter, 364 mSDsluCounter, 1982 mSDsCounter, 0 mSdLazyCounter, 4304 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 392 SdHoareTripleChecker+Valid, 2209 SdHoareTripleChecker+Invalid, 6262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 4304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1767 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-11-20 05:56:29,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [392 Valid, 2209 Invalid, 6262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 4304 Invalid, 0 Unknown, 1767 Unchecked, 3.5s Time] [2021-11-20 05:56:29,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2021-11-20 05:56:29,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 562. [2021-11-20 05:56:29,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 562 states, 380 states have (on average 1.118421052631579) internal successors, (425), 392 states have internal predecessors, (425), 133 states have call successors, (133), 38 states have call predecessors, (133), 48 states have return successors, (241), 131 states have call predecessors, (241), 132 states have call successors, (241) [2021-11-20 05:56:29,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 799 transitions. [2021-11-20 05:56:29,285 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 799 transitions. Word has length 153 [2021-11-20 05:56:29,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:56:29,286 INFO L470 AbstractCegarLoop]: Abstraction has 562 states and 799 transitions. [2021-11-20 05:56:29,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 35 states have (on average 5.0285714285714285) internal successors, (176), 35 states have internal predecessors, (176), 15 states have call successors, (39), 10 states have call predecessors, (39), 14 states have return successors, (38), 13 states have call predecessors, (38), 15 states have call successors, (38) [2021-11-20 05:56:29,286 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 799 transitions. [2021-11-20 05:56:29,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-11-20 05:56:29,298 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:56:29,299 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:56:29,336 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-20 05:56:29,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-20 05:56:29,516 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:56:29,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:56:29,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1864790728, now seen corresponding path program 1 times [2021-11-20 05:56:29,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:56:29,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239151302] [2021-11-20 05:56:29,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:56:29,517 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:56:29,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:29,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 05:56:29,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:29,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 05:56:29,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:29,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 05:56:29,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:29,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:56:29,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:29,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 05:56:29,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:29,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:56:29,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:29,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 05:56:29,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:30,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-20 05:56:30,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:30,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-20 05:56:30,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:30,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-20 05:56:30,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:30,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-20 05:56:30,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:30,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 05:56:30,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:30,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-11-20 05:56:30,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:30,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-11-20 05:56:30,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:30,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-11-20 05:56:30,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:30,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-11-20 05:56:30,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:30,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-11-20 05:56:30,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:30,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:56:30,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:30,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 05:56:30,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:30,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-11-20 05:56:30,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:30,531 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2021-11-20 05:56:30,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:56:30,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239151302] [2021-11-20 05:56:30,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239151302] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:56:30,532 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:56:30,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-11-20 05:56:30,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062700308] [2021-11-20 05:56:30,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:56:30,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-20 05:56:30,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:56:30,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-20 05:56:30,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-11-20 05:56:30,533 INFO L87 Difference]: Start difference. First operand 562 states and 799 transitions. Second operand has 15 states, 14 states have (on average 5.071428571428571) internal successors, (71), 11 states have internal predecessors, (71), 6 states have call successors, (21), 5 states have call predecessors, (21), 3 states have return successors, (20), 5 states have call predecessors, (20), 5 states have call successors, (20) [2021-11-20 05:56:32,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:56:32,491 INFO L93 Difference]: Finished difference Result 824 states and 1214 transitions. [2021-11-20 05:56:32,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-20 05:56:32,492 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 5.071428571428571) internal successors, (71), 11 states have internal predecessors, (71), 6 states have call successors, (21), 5 states have call predecessors, (21), 3 states have return successors, (20), 5 states have call predecessors, (20), 5 states have call successors, (20) Word has length 160 [2021-11-20 05:56:32,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:56:32,498 INFO L225 Difference]: With dead ends: 824 [2021-11-20 05:56:32,498 INFO L226 Difference]: Without dead ends: 680 [2021-11-20 05:56:32,500 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2021-11-20 05:56:32,500 INFO L933 BasicCegarLoop]: 173 mSDtfsCounter, 166 mSDsluCounter, 638 mSDsCounter, 0 mSdLazyCounter, 1610 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 811 SdHoareTripleChecker+Invalid, 1704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 1610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-20 05:56:32,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 811 Invalid, 1704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 1610 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-20 05:56:32,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2021-11-20 05:56:32,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 586. [2021-11-20 05:56:32,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 401 states have (on average 1.1221945137157108) internal successors, (450), 413 states have internal predecessors, (450), 135 states have call successors, (135), 39 states have call predecessors, (135), 49 states have return successors, (249), 133 states have call predecessors, (249), 134 states have call successors, (249) [2021-11-20 05:56:32,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 834 transitions. [2021-11-20 05:56:32,561 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 834 transitions. Word has length 160 [2021-11-20 05:56:32,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:56:32,562 INFO L470 AbstractCegarLoop]: Abstraction has 586 states and 834 transitions. [2021-11-20 05:56:32,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 5.071428571428571) internal successors, (71), 11 states have internal predecessors, (71), 6 states have call successors, (21), 5 states have call predecessors, (21), 3 states have return successors, (20), 5 states have call predecessors, (20), 5 states have call successors, (20) [2021-11-20 05:56:32,562 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 834 transitions. [2021-11-20 05:56:32,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-11-20 05:56:32,567 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:56:32,568 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:56:32,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-20 05:56:32,568 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:56:32,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:56:32,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1721479034, now seen corresponding path program 1 times [2021-11-20 05:56:32,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:56:32,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605112900] [2021-11-20 05:56:32,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:56:32,569 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:56:32,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:32,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 05:56:32,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:32,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 05:56:32,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:32,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 05:56:32,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:32,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:56:32,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:32,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 05:56:32,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:32,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:56:32,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:33,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 05:56:33,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:33,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-20 05:56:33,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:33,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-20 05:56:33,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:33,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-20 05:56:33,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:33,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-20 05:56:33,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:33,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 05:56:33,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:33,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-11-20 05:56:33,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:33,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-11-20 05:56:33,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:33,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-11-20 05:56:33,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:33,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-11-20 05:56:33,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:33,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-11-20 05:56:33,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:33,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:56:33,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:33,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 05:56:33,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:33,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-11-20 05:56:33,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:33,386 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2021-11-20 05:56:33,386 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:56:33,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605112900] [2021-11-20 05:56:33,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605112900] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:56:33,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396081051] [2021-11-20 05:56:33,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:56:33,387 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:56:33,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:56:33,388 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:56:33,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-20 05:56:33,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:33,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 2793 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-20 05:56:33,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:56:34,534 INFO L354 Elim1Store]: treesize reduction 453, result has 16.9 percent of original size [2021-11-20 05:56:34,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 103 [2021-11-20 05:56:35,074 INFO L354 Elim1Store]: treesize reduction 36, result has 42.9 percent of original size [2021-11-20 05:56:35,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 103 treesize of output 99 [2021-11-20 05:56:35,367 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 118 proven. 8 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-20 05:56:35,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:56:35,861 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 28 treesize of output 16 [2021-11-20 05:56:35,959 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-11-20 05:56:35,960 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 05:56:36,053 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-11-20 05:56:36,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396081051] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:56:36,054 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:56:36,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13, 12] total 25 [2021-11-20 05:56:36,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594149470] [2021-11-20 05:56:36,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:56:36,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-20 05:56:36,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:56:36,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-20 05:56:36,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-11-20 05:56:36,056 INFO L87 Difference]: Start difference. First operand 586 states and 834 transitions. Second operand has 25 states, 24 states have (on average 5.541666666666667) internal successors, (133), 22 states have internal predecessors, (133), 10 states have call successors, (41), 8 states have call predecessors, (41), 7 states have return successors, (37), 8 states have call predecessors, (37), 10 states have call successors, (37) [2021-11-20 05:56:38,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:56:38,025 INFO L93 Difference]: Finished difference Result 843 states and 1211 transitions. [2021-11-20 05:56:38,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-20 05:56:38,026 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 5.541666666666667) internal successors, (133), 22 states have internal predecessors, (133), 10 states have call successors, (41), 8 states have call predecessors, (41), 7 states have return successors, (37), 8 states have call predecessors, (37), 10 states have call successors, (37) Word has length 160 [2021-11-20 05:56:38,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:56:38,031 INFO L225 Difference]: With dead ends: 843 [2021-11-20 05:56:38,031 INFO L226 Difference]: Without dead ends: 619 [2021-11-20 05:56:38,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 339 SyntacticMatches, 10 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=167, Invalid=955, Unknown=0, NotChecked=0, Total=1122 [2021-11-20 05:56:38,034 INFO L933 BasicCegarLoop]: 160 mSDtfsCounter, 166 mSDsluCounter, 1236 mSDsCounter, 0 mSdLazyCounter, 1978 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 1396 SdHoareTripleChecker+Invalid, 2499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1978 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 455 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-20 05:56:38,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 1396 Invalid, 2499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1978 Invalid, 0 Unknown, 455 Unchecked, 1.7s Time] [2021-11-20 05:56:38,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2021-11-20 05:56:38,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 586. [2021-11-20 05:56:38,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 401 states have (on average 1.1221945137157108) internal successors, (450), 413 states have internal predecessors, (450), 135 states have call successors, (135), 39 states have call predecessors, (135), 49 states have return successors, (248), 133 states have call predecessors, (248), 134 states have call successors, (248) [2021-11-20 05:56:38,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 833 transitions. [2021-11-20 05:56:38,093 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 833 transitions. Word has length 160 [2021-11-20 05:56:38,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:56:38,093 INFO L470 AbstractCegarLoop]: Abstraction has 586 states and 833 transitions. [2021-11-20 05:56:38,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 5.541666666666667) internal successors, (133), 22 states have internal predecessors, (133), 10 states have call successors, (41), 8 states have call predecessors, (41), 7 states have return successors, (37), 8 states have call predecessors, (37), 10 states have call successors, (37) [2021-11-20 05:56:38,094 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 833 transitions. [2021-11-20 05:56:38,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-11-20 05:56:38,099 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:56:38,099 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:56:38,127 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-20 05:56:38,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2021-11-20 05:56:38,312 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:56:38,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:56:38,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1722022404, now seen corresponding path program 1 times [2021-11-20 05:56:38,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:56:38,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500424021] [2021-11-20 05:56:38,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:56:38,313 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:56:38,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:38,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 05:56:38,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:38,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 05:56:38,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:38,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 05:56:38,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:38,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:56:38,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:38,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 05:56:38,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:38,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:56:38,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:38,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 05:56:38,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:38,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-20 05:56:38,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:38,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-20 05:56:38,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:38,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-20 05:56:38,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:38,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-20 05:56:38,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:38,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 05:56:38,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:38,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-11-20 05:56:38,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:38,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-11-20 05:56:38,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:38,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-11-20 05:56:38,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:38,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-11-20 05:56:38,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:38,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-11-20 05:56:38,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:38,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:56:38,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:38,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 05:56:38,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:38,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-11-20 05:56:38,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:39,004 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 38 proven. 18 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2021-11-20 05:56:39,004 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:56:39,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500424021] [2021-11-20 05:56:39,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500424021] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:56:39,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960046853] [2021-11-20 05:56:39,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:56:39,005 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:56:39,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:56:39,008 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:56:39,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-20 05:56:39,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:39,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 2790 conjuncts, 60 conjunts are in the unsatisfiable core [2021-11-20 05:56:39,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:56:39,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-20 05:56:39,722 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 05:56:40,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:56:40,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 60 [2021-11-20 05:56:40,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:56:40,536 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-11-20 05:56:40,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 45 [2021-11-20 05:56:40,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:56:40,547 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-20 05:56:40,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 44 [2021-11-20 05:56:40,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:56:40,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:56:40,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 54 [2021-11-20 05:56:40,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:56:40,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:56:40,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:56:40,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:56:40,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 42 [2021-11-20 05:56:40,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:56:40,686 INFO L354 Elim1Store]: treesize reduction 56, result has 1.8 percent of original size [2021-11-20 05:56:40,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 79 treesize of output 49 [2021-11-20 05:56:41,146 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 118 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-20 05:56:41,146 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 05:56:41,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960046853] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:56:41,146 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 05:56:41,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [14] total 32 [2021-11-20 05:56:41,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659159674] [2021-11-20 05:56:41,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:56:41,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-20 05:56:41,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:56:41,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-20 05:56:41,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=887, Unknown=0, NotChecked=0, Total=992 [2021-11-20 05:56:41,148 INFO L87 Difference]: Start difference. First operand 586 states and 833 transitions. Second operand has 20 states, 18 states have (on average 4.666666666666667) internal successors, (84), 15 states have internal predecessors, (84), 7 states have call successors, (21), 5 states have call predecessors, (21), 7 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2021-11-20 05:56:42,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:56:42,413 INFO L93 Difference]: Finished difference Result 1037 states and 1553 transitions. [2021-11-20 05:56:42,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-20 05:56:42,419 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 4.666666666666667) internal successors, (84), 15 states have internal predecessors, (84), 7 states have call successors, (21), 5 states have call predecessors, (21), 7 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) Word has length 160 [2021-11-20 05:56:42,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:56:42,424 INFO L225 Difference]: With dead ends: 1037 [2021-11-20 05:56:42,424 INFO L226 Difference]: Without dead ends: 766 [2021-11-20 05:56:42,427 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 178 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=190, Invalid=1702, Unknown=0, NotChecked=0, Total=1892 [2021-11-20 05:56:42,427 INFO L933 BasicCegarLoop]: 166 mSDtfsCounter, 244 mSDsluCounter, 514 mSDsCounter, 0 mSdLazyCounter, 1183 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 680 SdHoareTripleChecker+Invalid, 2368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 1183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1024 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-20 05:56:42,428 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [281 Valid, 680 Invalid, 2368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 1183 Invalid, 0 Unknown, 1024 Unchecked, 0.9s Time] [2021-11-20 05:56:42,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2021-11-20 05:56:42,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 646. [2021-11-20 05:56:42,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 646 states, 423 states have (on average 1.127659574468085) internal successors, (477), 438 states have internal predecessors, (477), 169 states have call successors, (169), 40 states have call predecessors, (169), 53 states have return successors, (306), 167 states have call predecessors, (306), 168 states have call successors, (306) [2021-11-20 05:56:42,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 952 transitions. [2021-11-20 05:56:42,502 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 952 transitions. Word has length 160 [2021-11-20 05:56:42,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:56:42,502 INFO L470 AbstractCegarLoop]: Abstraction has 646 states and 952 transitions. [2021-11-20 05:56:42,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 4.666666666666667) internal successors, (84), 15 states have internal predecessors, (84), 7 states have call successors, (21), 5 states have call predecessors, (21), 7 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2021-11-20 05:56:42,503 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 952 transitions. [2021-11-20 05:56:42,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-11-20 05:56:42,509 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:56:42,509 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:56:42,551 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-20 05:56:42,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-20 05:56:42,724 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:56:42,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:56:42,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1107915534, now seen corresponding path program 2 times [2021-11-20 05:56:42,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:56:42,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44539478] [2021-11-20 05:56:42,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:56:42,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:56:42,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:43,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 05:56:43,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:43,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 05:56:43,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:43,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 05:56:43,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:43,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:56:43,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:43,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 05:56:43,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:43,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:56:43,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:43,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 05:56:43,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:43,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-20 05:56:43,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:43,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-20 05:56:43,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:43,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-20 05:56:43,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:43,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 05:56:43,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:43,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-11-20 05:56:43,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:43,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-11-20 05:56:43,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:43,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-11-20 05:56:44,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:44,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-11-20 05:56:44,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:44,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-11-20 05:56:44,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:44,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-11-20 05:56:44,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:44,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:56:44,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:44,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 05:56:44,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:44,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-11-20 05:56:44,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:44,229 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 16 proven. 27 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2021-11-20 05:56:44,230 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:56:44,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44539478] [2021-11-20 05:56:44,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44539478] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:56:44,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088449958] [2021-11-20 05:56:44,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 05:56:44,230 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:56:44,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:56:44,231 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:56:44,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-20 05:56:44,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 05:56:44,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:56:44,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 2783 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-20 05:56:44,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:56:46,937 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 120 proven. 22 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-20 05:56:46,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:56:47,602 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-11-20 05:56:47,603 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 05:56:47,789 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 40 proven. 24 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-11-20 05:56:47,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088449958] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:56:47,790 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:56:47,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 14, 11] total 46 [2021-11-20 05:56:47,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644067292] [2021-11-20 05:56:47,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:56:47,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-20 05:56:47,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:56:47,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-20 05:56:47,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1936, Unknown=0, NotChecked=0, Total=2070 [2021-11-20 05:56:47,793 INFO L87 Difference]: Start difference. First operand 646 states and 952 transitions. Second operand has 46 states, 40 states have (on average 4.125) internal successors, (165), 41 states have internal predecessors, (165), 17 states have call successors, (57), 6 states have call predecessors, (57), 10 states have return successors, (56), 14 states have call predecessors, (56), 17 states have call successors, (56) [2021-11-20 05:57:05,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:57:05,132 INFO L93 Difference]: Finished difference Result 1604 states and 2653 transitions. [2021-11-20 05:57:05,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-11-20 05:57:05,135 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 40 states have (on average 4.125) internal successors, (165), 41 states have internal predecessors, (165), 17 states have call successors, (57), 6 states have call predecessors, (57), 10 states have return successors, (56), 14 states have call predecessors, (56), 17 states have call successors, (56) Word has length 160 [2021-11-20 05:57:05,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:57:05,145 INFO L225 Difference]: With dead ends: 1604 [2021-11-20 05:57:05,145 INFO L226 Difference]: Without dead ends: 1296 [2021-11-20 05:57:05,149 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 472 GetRequests, 347 SyntacticMatches, 20 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3182 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=937, Invalid=10405, Unknown=0, NotChecked=0, Total=11342 [2021-11-20 05:57:05,150 INFO L933 BasicCegarLoop]: 250 mSDtfsCounter, 595 mSDsluCounter, 2464 mSDsCounter, 0 mSdLazyCounter, 12268 mSolverCounterSat, 1074 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 623 SdHoareTripleChecker+Valid, 2714 SdHoareTripleChecker+Invalid, 15222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1074 IncrementalHoareTripleChecker+Valid, 12268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1880 IncrementalHoareTripleChecker+Unchecked, 12.8s IncrementalHoareTripleChecker+Time [2021-11-20 05:57:05,150 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [623 Valid, 2714 Invalid, 15222 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1074 Valid, 12268 Invalid, 0 Unknown, 1880 Unchecked, 12.8s Time] [2021-11-20 05:57:05,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1296 states. [2021-11-20 05:57:05,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1296 to 981. [2021-11-20 05:57:05,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 981 states, 633 states have (on average 1.1248025276461295) internal successors, (712), 649 states have internal predecessors, (712), 270 states have call successors, (270), 63 states have call predecessors, (270), 77 states have return successors, (507), 268 states have call predecessors, (507), 269 states have call successors, (507) [2021-11-20 05:57:05,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 981 states to 981 states and 1489 transitions. [2021-11-20 05:57:05,287 INFO L78 Accepts]: Start accepts. Automaton has 981 states and 1489 transitions. Word has length 160 [2021-11-20 05:57:05,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:57:05,287 INFO L470 AbstractCegarLoop]: Abstraction has 981 states and 1489 transitions. [2021-11-20 05:57:05,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 40 states have (on average 4.125) internal successors, (165), 41 states have internal predecessors, (165), 17 states have call successors, (57), 6 states have call predecessors, (57), 10 states have return successors, (56), 14 states have call predecessors, (56), 17 states have call successors, (56) [2021-11-20 05:57:05,288 INFO L276 IsEmpty]: Start isEmpty. Operand 981 states and 1489 transitions. [2021-11-20 05:57:05,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-11-20 05:57:05,295 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:57:05,296 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:57:05,336 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-20 05:57:05,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-20 05:57:05,524 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:57:05,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:57:05,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1970898036, now seen corresponding path program 2 times [2021-11-20 05:57:05,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:57:05,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218565618] [2021-11-20 05:57:05,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:57:05,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:57:05,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:57:05,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 05:57:05,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:57:05,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 05:57:05,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:57:05,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 05:57:05,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:57:05,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:57:05,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:57:05,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 05:57:05,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:57:05,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:57:05,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:57:05,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 05:57:05,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:57:06,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-20 05:57:06,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:57:06,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-20 05:57:06,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:57:06,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-20 05:57:06,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:57:06,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 05:57:06,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:57:06,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-11-20 05:57:06,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:57:06,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-11-20 05:57:06,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:57:06,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-11-20 05:57:06,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:57:06,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-11-20 05:57:06,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:57:06,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-11-20 05:57:06,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:57:06,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-11-20 05:57:06,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:57:06,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:57:06,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:57:06,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 05:57:06,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:57:06,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-11-20 05:57:06,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:57:06,345 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2021-11-20 05:57:06,345 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:57:06,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218565618] [2021-11-20 05:57:06,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218565618] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:57:06,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285647084] [2021-11-20 05:57:06,346 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 05:57:06,346 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:57:06,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:57:06,348 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:57:06,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-20 05:57:07,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 05:57:07,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:57:07,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 2788 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-20 05:57:07,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:57:07,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-20 05:57:07,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:57:07,591 INFO L354 Elim1Store]: treesize reduction 172, result has 12.2 percent of original size [2021-11-20 05:57:07,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 80 treesize of output 63 [2021-11-20 05:57:07,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:57:07,644 INFO L354 Elim1Store]: treesize reduction 262, result has 11.2 percent of original size [2021-11-20 05:57:07,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 65 treesize of output 51 [2021-11-20 05:57:07,712 INFO L354 Elim1Store]: treesize reduction 62, result has 1.6 percent of original size [2021-11-20 05:57:07,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 55 treesize of output 25 [2021-11-20 05:57:07,898 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 122 proven. 4 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-20 05:57:07,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:57:21,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285647084] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:57:21,904 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:57:21,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12] total 22 [2021-11-20 05:57:21,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119536707] [2021-11-20 05:57:21,905 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:57:21,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-20 05:57:21,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:57:21,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-20 05:57:21,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=476, Unknown=6, NotChecked=0, Total=552 [2021-11-20 05:57:21,906 INFO L87 Difference]: Start difference. First operand 981 states and 1489 transitions. Second operand has 22 states, 21 states have (on average 6.0) internal successors, (126), 19 states have internal predecessors, (126), 9 states have call successors, (39), 6 states have call predecessors, (39), 5 states have return successors, (36), 7 states have call predecessors, (36), 9 states have call successors, (36) [2021-11-20 05:57:23,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:57:23,271 INFO L93 Difference]: Finished difference Result 1497 states and 2253 transitions. [2021-11-20 05:57:23,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-20 05:57:23,271 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 6.0) internal successors, (126), 19 states have internal predecessors, (126), 9 states have call successors, (39), 6 states have call predecessors, (39), 5 states have return successors, (36), 7 states have call predecessors, (36), 9 states have call successors, (36) Word has length 160 [2021-11-20 05:57:23,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:57:23,282 INFO L225 Difference]: With dead ends: 1497 [2021-11-20 05:57:23,282 INFO L226 Difference]: Without dead ends: 967 [2021-11-20 05:57:23,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 285 SyntacticMatches, 8 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 14.5s TimeCoverageRelationStatistics Valid=155, Invalid=895, Unknown=6, NotChecked=0, Total=1056 [2021-11-20 05:57:23,286 INFO L933 BasicCegarLoop]: 147 mSDtfsCounter, 286 mSDsluCounter, 948 mSDsCounter, 0 mSdLazyCounter, 1293 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 1095 SdHoareTripleChecker+Invalid, 1675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 1293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 206 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:57:23,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [309 Valid, 1095 Invalid, 1675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 1293 Invalid, 0 Unknown, 206 Unchecked, 1.0s Time] [2021-11-20 05:57:23,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 967 states. [2021-11-20 05:57:23,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 967 to 951. [2021-11-20 05:57:23,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 951 states, 623 states have (on average 1.1252006420545746) internal successors, (701), 640 states have internal predecessors, (701), 250 states have call successors, (250), 62 states have call predecessors, (250), 77 states have return successors, (479), 248 states have call predecessors, (479), 249 states have call successors, (479) [2021-11-20 05:57:23,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 951 states to 951 states and 1430 transitions. [2021-11-20 05:57:23,403 INFO L78 Accepts]: Start accepts. Automaton has 951 states and 1430 transitions. Word has length 160 [2021-11-20 05:57:23,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:57:23,403 INFO L470 AbstractCegarLoop]: Abstraction has 951 states and 1430 transitions. [2021-11-20 05:57:23,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 6.0) internal successors, (126), 19 states have internal predecessors, (126), 9 states have call successors, (39), 6 states have call predecessors, (39), 5 states have return successors, (36), 7 states have call predecessors, (36), 9 states have call successors, (36) [2021-11-20 05:57:23,404 INFO L276 IsEmpty]: Start isEmpty. Operand 951 states and 1430 transitions. [2021-11-20 05:57:23,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-11-20 05:57:23,410 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:57:23,410 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:57:23,452 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-20 05:57:23,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-20 05:57:23,624 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:57:23,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:57:23,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1638254898, now seen corresponding path program 1 times [2021-11-20 05:57:23,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:57:23,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676284859] [2021-11-20 05:57:23,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:57:23,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:57:23,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:57:24,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 05:57:24,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:57:24,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 05:57:24,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:57:24,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 05:57:24,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:57:24,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:57:24,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:57:24,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 05:57:24,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:57:24,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:57:24,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:57:24,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 05:57:24,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:57:24,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-20 05:57:24,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:57:24,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-20 05:57:24,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:57:24,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-20 05:57:24,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:57:24,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 05:57:24,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:57:24,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-11-20 05:57:24,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:57:24,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-11-20 05:57:24,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:57:24,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-11-20 05:57:24,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:57:24,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-11-20 05:57:24,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:57:24,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-11-20 05:57:24,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:57:24,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-11-20 05:57:24,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:57:24,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:57:24,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:57:24,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 05:57:24,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:57:24,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-11-20 05:57:24,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:57:24,837 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-11-20 05:57:24,837 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:57:24,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676284859] [2021-11-20 05:57:24,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676284859] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:57:24,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133914438] [2021-11-20 05:57:24,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:57:24,838 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:57:24,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:57:24,840 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:57:24,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4ac248-ee57-43ea-9b78-461f6a6a62ef/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-20 05:57:25,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:57:25,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 2793 conjuncts, 98 conjunts are in the unsatisfiable core [2021-11-20 05:57:25,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:57:25,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-20 05:57:25,516 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 05:57:30,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:57:30,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:57:30,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 60 [2021-11-20 05:57:30,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:57:30,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:57:30,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:57:30,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:57:30,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 48 [2021-11-20 05:57:34,779 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 05:57:36,842 WARN L860 $PredicateComparison]: unable to prove that (or (exists ((|save_byte_from_array_~array#1.offset| Int) (|aux_div_save_byte_from_array_nondet_size_t_#res#1_70| Int) (|save_byte_from_array_~storage#1.base| Int) (|aux_mod_save_byte_from_array_nondet_size_t_#res#1_70| Int) (|save_byte_from_array_~array#1.base| Int)) (and (= (store |c_old(#memory_int)| |save_byte_from_array_~storage#1.base| (let ((.cse0 (store (select |c_old(#memory_int)| |save_byte_from_array_~storage#1.base|) |c_save_byte_from_array_#in~storage#1.offset| (+ |aux_mod_save_byte_from_array_nondet_size_t_#res#1_70| (* |aux_div_save_byte_from_array_nondet_size_t_#res#1_70| 18446744073709551616))))) (store .cse0 (+ |c_save_byte_from_array_#in~storage#1.offset| 8) (select (select (store |c_old(#memory_int)| |save_byte_from_array_~storage#1.base| .cse0) |save_byte_from_array_~array#1.base|) (+ |save_byte_from_array_~array#1.offset| (mod |aux_mod_save_byte_from_array_nondet_size_t_#res#1_70| 18446744073709551616)))))) |c_#memory_int|) (<= |aux_mod_save_byte_from_array_nondet_size_t_#res#1_70| 9223372036854775807) (<= 0 |aux_mod_save_byte_from_array_nondet_size_t_#res#1_70|))) (exists ((|save_byte_from_array_~array#1.offset| Int) (|aux_div_save_byte_from_array_nondet_size_t_#res#1_70| Int) (|save_byte_from_array_~storage#1.base| Int) (|aux_mod_save_byte_from_array_nondet_size_t_#res#1_70| Int) (|save_byte_from_array_~array#1.base| Int)) (and (< 9223372036854775807 |aux_mod_save_byte_from_array_nondet_size_t_#res#1_70|) (= |c_#memory_int| (store |c_old(#memory_int)| |save_byte_from_array_~storage#1.base| (let ((.cse1 (store (select |c_old(#memory_int)| |save_byte_from_array_~storage#1.base|) |c_save_byte_from_array_#in~storage#1.offset| (+ |aux_mod_save_byte_from_array_nondet_size_t_#res#1_70| (* |aux_div_save_byte_from_array_nondet_size_t_#res#1_70| 18446744073709551616))))) (store .cse1 (+ |c_save_byte_from_array_#in~storage#1.offset| 8) (select (select (store |c_old(#memory_int)| |save_byte_from_array_~storage#1.base| .cse1) |save_byte_from_array_~array#1.base|) (+ (- 18446744073709551616) |save_byte_from_array_~array#1.offset| (mod |aux_mod_save_byte_from_array_nondet_size_t_#res#1_70| 18446744073709551616))))))) (< |aux_mod_save_byte_from_array_nondet_size_t_#res#1_70| 18446744073709551616)))) is different from true [2021-11-20 05:57:36,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:57:36,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:57:36,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:57:36,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:57:37,923 INFO L354 Elim1Store]: treesize reduction 770, result has 35.9 percent of original size [2021-11-20 05:57:37,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 25 case distinctions, treesize of input 215 treesize of output 683