./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_rend_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_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/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_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/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_16e5b556-0241-42ed-88f0-1eb117c1a747/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 ce5362e495562dfaea277a751eacbf753e9d90aa85c88e38ea1b10dbc078ec49 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 06:43:07,092 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 06:43:07,095 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 06:43:07,147 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 06:43:07,148 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 06:43:07,149 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 06:43:07,151 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 06:43:07,153 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 06:43:07,155 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 06:43:07,157 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 06:43:07,158 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 06:43:07,159 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 06:43:07,160 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 06:43:07,161 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 06:43:07,163 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 06:43:07,165 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 06:43:07,166 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 06:43:07,167 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 06:43:07,169 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 06:43:07,172 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 06:43:07,174 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 06:43:07,176 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 06:43:07,178 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 06:43:07,179 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 06:43:07,183 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 06:43:07,183 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 06:43:07,184 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 06:43:07,185 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 06:43:07,190 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 06:43:07,192 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 06:43:07,193 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 06:43:07,194 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 06:43:07,195 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 06:43:07,196 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 06:43:07,198 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 06:43:07,201 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 06:43:07,202 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 06:43:07,203 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 06:43:07,203 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 06:43:07,204 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 06:43:07,205 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 06:43:07,206 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-20 06:43:07,243 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 06:43:07,244 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 06:43:07,244 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 06:43:07,245 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 06:43:07,252 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 06:43:07,252 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 06:43:07,253 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 06:43:07,253 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 06:43:07,254 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 06:43:07,254 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 06:43:07,255 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 06:43:07,255 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 06:43:07,255 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 06:43:07,256 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 06:43:07,256 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 06:43:07,256 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 06:43:07,256 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 06:43:07,256 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 06:43:07,257 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 06:43:07,257 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 06:43:07,257 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 06:43:07,257 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:43:07,258 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 06:43:07,258 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 06:43:07,258 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 06:43:07,258 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 06:43:07,258 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 06:43:07,259 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 06:43:07,259 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 06:43:07,260 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 06:43:07,261 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 06:43:07,261 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_16e5b556-0241-42ed-88f0-1eb117c1a747/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ce5362e495562dfaea277a751eacbf753e9d90aa85c88e38ea1b10dbc078ec49 [2021-11-20 06:43:07,586 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 06:43:07,622 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 06:43:07,625 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 06:43:07,626 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 06:43:07,627 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 06:43:07,628 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness.i [2021-11-20 06:43:07,706 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/data/2d9e31b26/bec2d1c75d9c460c9de9e41923b7c7f1/FLAG401564546 [2021-11-20 06:43:08,400 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 06:43:08,401 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness.i [2021-11-20 06:43:08,446 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/data/2d9e31b26/bec2d1c75d9c460c9de9e41923b7c7f1/FLAG401564546 [2021-11-20 06:43:08,538 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/data/2d9e31b26/bec2d1c75d9c460c9de9e41923b7c7f1 [2021-11-20 06:43:08,540 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 06:43:08,543 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 06:43:08,545 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 06:43:08,545 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 06:43:08,548 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 06:43:08,549 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:43:08" (1/1) ... [2021-11-20 06:43:08,550 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@615a4f60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:43:08, skipping insertion in model container [2021-11-20 06:43:08,550 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:43:08" (1/1) ... [2021-11-20 06:43:08,557 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 06:43:08,662 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 06:43:08,972 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_16e5b556-0241-42ed-88f0-1eb117c1a747/sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness.i[4494,4507] [2021-11-20 06:43:08,980 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_16e5b556-0241-42ed-88f0-1eb117c1a747/sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness.i[4554,4567] [2021-11-20 06:43:09,689 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:43:09,690 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:43:09,690 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:43:09,691 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:43:09,692 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:43:09,715 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:43:09,717 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:43:09,727 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:43:09,730 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:43:09,732 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:43:09,735 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:43:09,741 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:43:09,741 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:43:10,048 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-20 06:43:10,050 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-20 06:43:10,051 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-20 06:43:10,052 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-20 06:43:10,054 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-20 06:43:10,054 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-20 06:43:10,055 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-20 06:43:10,056 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-20 06:43:10,057 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-20 06:43:10,057 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-20 06:43:10,208 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-20 06:43:10,256 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:43:10,272 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 06:43:10,299 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_16e5b556-0241-42ed-88f0-1eb117c1a747/sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness.i[4494,4507] [2021-11-20 06:43:10,300 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_16e5b556-0241-42ed-88f0-1eb117c1a747/sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness.i[4554,4567] [2021-11-20 06:43:10,349 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:43:10,350 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:43:10,351 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:43:10,352 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:43:10,353 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:43:10,362 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:43:10,362 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:43:10,364 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:43:10,364 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:43:10,366 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:43:10,367 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:43:10,367 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:43:10,368 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:43:10,414 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-20 06:43:10,415 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-20 06:43:10,416 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-20 06:43:10,417 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-20 06:43:10,419 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-20 06:43:10,419 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-20 06:43:10,420 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-20 06:43:10,421 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-20 06:43:10,421 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-20 06:43:10,422 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-20 06:43:10,450 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-20 06:43:10,468 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:43:10,778 INFO L208 MainTranslator]: Completed translation [2021-11-20 06:43:10,779 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:43:10 WrapperNode [2021-11-20 06:43:10,779 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 06:43:10,780 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 06:43:10,780 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 06:43:10,780 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 06:43:10,787 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:43:10" (1/1) ... [2021-11-20 06:43:10,880 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:43:10" (1/1) ... [2021-11-20 06:43:10,947 INFO L137 Inliner]: procedures = 679, calls = 1040, calls flagged for inlining = 52, calls inlined = 6, statements flattened = 136 [2021-11-20 06:43:10,947 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 06:43:10,949 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 06:43:10,950 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 06:43:10,950 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 06:43:10,958 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:43:10" (1/1) ... [2021-11-20 06:43:10,958 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:43:10" (1/1) ... [2021-11-20 06:43:10,969 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:43:10" (1/1) ... [2021-11-20 06:43:10,970 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:43:10" (1/1) ... [2021-11-20 06:43:10,997 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:43:10" (1/1) ... [2021-11-20 06:43:11,000 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:43:10" (1/1) ... [2021-11-20 06:43:11,005 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:43:10" (1/1) ... [2021-11-20 06:43:11,011 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 06:43:11,012 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 06:43:11,012 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 06:43:11,012 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 06:43:11,013 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:43:10" (1/1) ... [2021-11-20 06:43:11,020 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:43:11,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:43:11,046 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 06:43:11,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 06:43:11,103 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 06:43:11,103 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-20 06:43:11,103 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-20 06:43:11,103 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2021-11-20 06:43:11,104 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2021-11-20 06:43:11,104 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 06:43:11,104 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2021-11-20 06:43:11,104 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2021-11-20 06:43:11,104 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 06:43:11,104 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-20 06:43:11,105 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 06:43:11,105 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 06:43:11,105 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-20 06:43:11,105 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-20 06:43:11,105 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 06:43:11,106 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-20 06:43:11,106 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-20 06:43:11,106 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-11-20 06:43:11,106 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-11-20 06:43:11,106 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 06:43:11,288 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 06:43:11,289 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 06:43:11,588 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 06:43:11,608 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 06:43:11,609 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-20 06:43:11,611 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:43:11 BoogieIcfgContainer [2021-11-20 06:43:11,625 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 06:43:11,627 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 06:43:11,627 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 06:43:11,630 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 06:43:11,630 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 06:43:08" (1/3) ... [2021-11-20 06:43:11,631 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@736f18a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:43:11, skipping insertion in model container [2021-11-20 06:43:11,631 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:43:10" (2/3) ... [2021-11-20 06:43:11,632 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@736f18a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:43:11, skipping insertion in model container [2021-11-20 06:43:11,632 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:43:11" (3/3) ... [2021-11-20 06:43:11,633 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_linked_list_rend_harness.i [2021-11-20 06:43:11,638 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 06:43:11,638 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 06:43:11,724 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 06:43:11,737 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 06:43:11,738 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 06:43:11,755 INFO L276 IsEmpty]: Start isEmpty. Operand has 68 states, 48 states have (on average 1.3541666666666667) internal successors, (65), 49 states have internal predecessors, (65), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-20 06:43:11,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-20 06:43:11,764 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:43:11,765 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:43:11,766 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:43:11,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:43:11,773 INFO L85 PathProgramCache]: Analyzing trace with hash -2107862704, now seen corresponding path program 1 times [2021-11-20 06:43:11,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:43:11,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892130228] [2021-11-20 06:43:11,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:43:11,783 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:43:11,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:12,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:43:12,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:12,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 06:43:12,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:12,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 06:43:12,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:12,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-20 06:43:12,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:12,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-20 06:43:12,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:12,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-20 06:43:12,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:12,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-20 06:43:12,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:12,402 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-20 06:43:12,403 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:43:12,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892130228] [2021-11-20 06:43:12,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892130228] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:43:12,408 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:43:12,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 06:43:12,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257176373] [2021-11-20 06:43:12,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:43:12,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 06:43:12,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:43:12,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 06:43:12,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 06:43:12,463 INFO L87 Difference]: Start difference. First operand has 68 states, 48 states have (on average 1.3541666666666667) internal successors, (65), 49 states have internal predecessors, (65), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-20 06:43:12,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:43:12,503 INFO L93 Difference]: Finished difference Result 128 states and 184 transitions. [2021-11-20 06:43:12,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 06:43:12,505 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 68 [2021-11-20 06:43:12,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:43:12,514 INFO L225 Difference]: With dead ends: 128 [2021-11-20 06:43:12,514 INFO L226 Difference]: Without dead ends: 63 [2021-11-20 06:43:12,518 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 06:43:12,522 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:43:12,523 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:43:12,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-11-20 06:43:12,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-11-20 06:43:12,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 44 states have (on average 1.2954545454545454) internal successors, (57), 45 states have internal predecessors, (57), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-11-20 06:43:12,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 82 transitions. [2021-11-20 06:43:12,587 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 82 transitions. Word has length 68 [2021-11-20 06:43:12,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:43:12,588 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 82 transitions. [2021-11-20 06:43:12,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-20 06:43:12,590 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 82 transitions. [2021-11-20 06:43:12,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-20 06:43:12,598 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:43:12,598 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:43:12,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 06:43:12,599 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:43:12,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:43:12,601 INFO L85 PathProgramCache]: Analyzing trace with hash 900796622, now seen corresponding path program 1 times [2021-11-20 06:43:12,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:43:12,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645560646] [2021-11-20 06:43:12,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:43:12,607 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:43:12,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:12,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:43:12,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:12,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 06:43:12,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:12,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 06:43:12,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:12,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-20 06:43:12,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:12,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-20 06:43:12,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:12,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-20 06:43:12,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:12,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-20 06:43:13,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:13,032 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-20 06:43:13,032 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:43:13,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645560646] [2021-11-20 06:43:13,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645560646] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:43:13,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773431088] [2021-11-20 06:43:13,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:43:13,033 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:43:13,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:43:13,036 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:43:13,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 06:43:13,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:13,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-20 06:43:13,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:43:13,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:43:13,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2021-11-20 06:43:13,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:43:13,508 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 18 treesize of output 19 [2021-11-20 06:43:13,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:43:13,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:43:13,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:43:13,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:43:13,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:43:13,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:43:13,648 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 06:43:13,648 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 1 case distinctions, treesize of input 37 treesize of output 43 [2021-11-20 06:43:13,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:43:13,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:43:13,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:43:13,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:43:13,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:43:13,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:43:13,673 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 0 case distinctions, treesize of input 35 treesize of output 41 [2021-11-20 06:43:14,689 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 06:43:14,690 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:43:14,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773431088] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:43:14,690 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:43:14,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [6] total 13 [2021-11-20 06:43:14,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392629274] [2021-11-20 06:43:14,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:43:14,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 06:43:14,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:43:14,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 06:43:14,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-11-20 06:43:14,695 INFO L87 Difference]: Start difference. First operand 63 states and 82 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-20 06:43:14,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:43:14,909 INFO L93 Difference]: Finished difference Result 144 states and 195 transitions. [2021-11-20 06:43:14,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 06:43:14,910 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 68 [2021-11-20 06:43:14,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:43:14,913 INFO L225 Difference]: With dead ends: 144 [2021-11-20 06:43:14,914 INFO L226 Difference]: Without dead ends: 93 [2021-11-20 06:43:14,915 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-11-20 06:43:14,916 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 32 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:43:14,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 282 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 21 Invalid, 0 Unknown, 24 Unchecked, 0.1s Time] [2021-11-20 06:43:14,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-11-20 06:43:14,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 79. [2021-11-20 06:43:14,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 58 states have (on average 1.3275862068965518) internal successors, (77), 60 states have internal predecessors, (77), 14 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (14), 12 states have call predecessors, (14), 13 states have call successors, (14) [2021-11-20 06:43:14,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 105 transitions. [2021-11-20 06:43:14,933 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 105 transitions. Word has length 68 [2021-11-20 06:43:14,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:43:14,933 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 105 transitions. [2021-11-20 06:43:14,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-20 06:43:14,934 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 105 transitions. [2021-11-20 06:43:14,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-20 06:43:14,936 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:43:14,936 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:43:14,974 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 06:43:15,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-11-20 06:43:15,154 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:43:15,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:43:15,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1148591220, now seen corresponding path program 1 times [2021-11-20 06:43:15,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:43:15,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358897623] [2021-11-20 06:43:15,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:43:15,155 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:43:15,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:15,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:43:15,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:15,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 06:43:15,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:15,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 06:43:15,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:15,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-20 06:43:15,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:15,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-20 06:43:15,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:15,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-20 06:43:15,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:15,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-20 06:43:15,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:15,334 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-20 06:43:15,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:43:15,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358897623] [2021-11-20 06:43:15,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358897623] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:43:15,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540475020] [2021-11-20 06:43:15,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:43:15,335 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:43:15,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:43:15,336 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:43:15,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 06:43:15,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:15,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-20 06:43:15,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:43:15,581 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-20 06:43:15,582 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 1 case distinctions, treesize of input 16 treesize of output 17 [2021-11-20 06:43:16,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:43:16,120 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 06:43:16,121 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 26 treesize of output 10 [2021-11-20 06:43:16,205 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 06:43:16,205 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:43:16,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540475020] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:43:16,205 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:43:16,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [6] total 15 [2021-11-20 06:43:16,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715506005] [2021-11-20 06:43:16,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:43:16,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 06:43:16,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:43:16,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 06:43:16,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-11-20 06:43:16,208 INFO L87 Difference]: Start difference. First operand 79 states and 105 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-20 06:43:16,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:43:16,317 INFO L93 Difference]: Finished difference Result 173 states and 238 transitions. [2021-11-20 06:43:16,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 06:43:16,318 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 68 [2021-11-20 06:43:16,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:43:16,324 INFO L225 Difference]: With dead ends: 173 [2021-11-20 06:43:16,325 INFO L226 Difference]: Without dead ends: 118 [2021-11-20 06:43:16,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-11-20 06:43:16,332 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 68 mSDsluCounter, 549 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 658 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 132 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:43:16,333 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 658 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 132 Unchecked, 0.1s Time] [2021-11-20 06:43:16,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-11-20 06:43:16,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 99. [2021-11-20 06:43:16,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 77 states have (on average 1.3636363636363635) internal successors, (105), 79 states have internal predecessors, (105), 15 states have call successors, (15), 6 states have call predecessors, (15), 6 states have return successors, (15), 13 states have call predecessors, (15), 14 states have call successors, (15) [2021-11-20 06:43:16,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 135 transitions. [2021-11-20 06:43:16,357 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 135 transitions. Word has length 68 [2021-11-20 06:43:16,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:43:16,358 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 135 transitions. [2021-11-20 06:43:16,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-20 06:43:16,358 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 135 transitions. [2021-11-20 06:43:16,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-20 06:43:16,361 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:43:16,361 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:43:16,390 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 06:43:16,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:43:16,569 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:43:16,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:43:16,570 INFO L85 PathProgramCache]: Analyzing trace with hash 779681482, now seen corresponding path program 1 times [2021-11-20 06:43:16,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:43:16,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464581651] [2021-11-20 06:43:16,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:43:16,570 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:43:16,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:16,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:43:16,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:16,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 06:43:16,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:16,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 06:43:16,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:16,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-20 06:43:16,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:16,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-20 06:43:16,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:16,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-20 06:43:16,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:16,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-20 06:43:16,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:16,776 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-20 06:43:16,777 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:43:16,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464581651] [2021-11-20 06:43:16,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464581651] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:43:16,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107805486] [2021-11-20 06:43:16,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:43:16,778 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:43:16,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:43:16,782 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:43:16,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 06:43:16,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:16,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-20 06:43:16,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:43:17,033 INFO L354 Elim1Store]: treesize reduction 19, result has 50.0 percent of original size [2021-11-20 06:43:17,033 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 1 case distinctions, treesize of input 63 treesize of output 58 [2021-11-20 06:43:17,053 INFO L354 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2021-11-20 06:43:17,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 54 [2021-11-20 06:43:24,866 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 40 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:43:24,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:43:25,706 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 06:43:25,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107805486] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:43:25,706 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:43:25,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 16, 12] total 30 [2021-11-20 06:43:25,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858948412] [2021-11-20 06:43:25,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:43:25,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-20 06:43:25,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:43:25,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-20 06:43:25,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=763, Unknown=0, NotChecked=0, Total=870 [2021-11-20 06:43:25,709 INFO L87 Difference]: Start difference. First operand 99 states and 135 transitions. Second operand has 30 states, 27 states have (on average 3.6296296296296298) internal successors, (98), 26 states have internal predecessors, (98), 9 states have call successors, (17), 4 states have call predecessors, (17), 9 states have return successors, (17), 6 states have call predecessors, (17), 9 states have call successors, (17) [2021-11-20 06:43:27,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:43:27,205 INFO L93 Difference]: Finished difference Result 308 states and 461 transitions. [2021-11-20 06:43:27,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-20 06:43:27,206 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 27 states have (on average 3.6296296296296298) internal successors, (98), 26 states have internal predecessors, (98), 9 states have call successors, (17), 4 states have call predecessors, (17), 9 states have return successors, (17), 6 states have call predecessors, (17), 9 states have call successors, (17) Word has length 68 [2021-11-20 06:43:27,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:43:27,211 INFO L225 Difference]: With dead ends: 308 [2021-11-20 06:43:27,211 INFO L226 Difference]: Without dead ends: 242 [2021-11-20 06:43:27,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 128 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=260, Invalid=2190, Unknown=0, NotChecked=0, Total=2450 [2021-11-20 06:43:27,215 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 196 mSDsluCounter, 2052 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 2183 SdHoareTripleChecker+Invalid, 1154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 577 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 06:43:27,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 2183 Invalid, 1154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 564 Invalid, 0 Unknown, 577 Unchecked, 0.6s Time] [2021-11-20 06:43:27,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-11-20 06:43:27,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 215. [2021-11-20 06:43:27,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 177 states have (on average 1.4067796610169492) internal successors, (249), 185 states have internal predecessors, (249), 21 states have call successors, (21), 10 states have call predecessors, (21), 16 states have return successors, (48), 19 states have call predecessors, (48), 20 states have call successors, (48) [2021-11-20 06:43:27,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 318 transitions. [2021-11-20 06:43:27,278 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 318 transitions. Word has length 68 [2021-11-20 06:43:27,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:43:27,279 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 318 transitions. [2021-11-20 06:43:27,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 27 states have (on average 3.6296296296296298) internal successors, (98), 26 states have internal predecessors, (98), 9 states have call successors, (17), 4 states have call predecessors, (17), 9 states have return successors, (17), 6 states have call predecessors, (17), 9 states have call successors, (17) [2021-11-20 06:43:27,279 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 318 transitions. [2021-11-20 06:43:27,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-20 06:43:27,286 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:43:27,286 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:43:27,311 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 06:43:27,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:43:27,490 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:43:27,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:43:27,491 INFO L85 PathProgramCache]: Analyzing trace with hash 577933322, now seen corresponding path program 1 times [2021-11-20 06:43:27,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:43:27,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028127682] [2021-11-20 06:43:27,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:43:27,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:43:27,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:27,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:43:27,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:27,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 06:43:27,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:27,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 06:43:27,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:27,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-11-20 06:43:27,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:27,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-20 06:43:27,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:27,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-20 06:43:27,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:27,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-20 06:43:27,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:27,721 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-20 06:43:27,721 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:43:27,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028127682] [2021-11-20 06:43:27,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028127682] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:43:27,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242912669] [2021-11-20 06:43:27,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:43:27,722 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:43:27,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:43:27,723 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:43:27,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 06:43:27,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:27,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 06:43:27,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:43:28,017 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 06:43:28,017 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:43:28,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242912669] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:43:28,017 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:43:28,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 11 [2021-11-20 06:43:28,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671192017] [2021-11-20 06:43:28,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:43:28,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:43:28,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:43:28,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:43:28,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:43:28,019 INFO L87 Difference]: Start difference. First operand 215 states and 318 transitions. Second operand has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-20 06:43:28,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:43:28,198 INFO L93 Difference]: Finished difference Result 369 states and 557 transitions. [2021-11-20 06:43:28,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 06:43:28,198 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 70 [2021-11-20 06:43:28,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:43:28,201 INFO L225 Difference]: With dead ends: 369 [2021-11-20 06:43:28,201 INFO L226 Difference]: Without dead ends: 229 [2021-11-20 06:43:28,202 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-11-20 06:43:28,203 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 105 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:43:28,204 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 245 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:43:28,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-11-20 06:43:28,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 225. [2021-11-20 06:43:28,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 184 states have (on average 1.3804347826086956) internal successors, (254), 195 states have internal predecessors, (254), 21 states have call successors, (21), 10 states have call predecessors, (21), 19 states have return successors, (57), 19 states have call predecessors, (57), 20 states have call successors, (57) [2021-11-20 06:43:28,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 332 transitions. [2021-11-20 06:43:28,233 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 332 transitions. Word has length 70 [2021-11-20 06:43:28,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:43:28,234 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 332 transitions. [2021-11-20 06:43:28,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-20 06:43:28,234 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 332 transitions. [2021-11-20 06:43:28,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-20 06:43:28,237 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:43:28,237 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:43:28,272 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 06:43:28,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:43:28,453 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:43:28,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:43:28,454 INFO L85 PathProgramCache]: Analyzing trace with hash -34807881, now seen corresponding path program 1 times [2021-11-20 06:43:28,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:43:28,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625397091] [2021-11-20 06:43:28,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:43:28,454 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:43:28,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:28,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:43:28,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:28,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 06:43:28,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:28,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 06:43:28,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:28,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-20 06:43:28,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:28,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-20 06:43:28,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:28,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-20 06:43:28,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:28,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-20 06:43:28,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:28,605 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-20 06:43:28,606 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:43:28,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625397091] [2021-11-20 06:43:28,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625397091] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:43:28,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020129022] [2021-11-20 06:43:28,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:43:28,607 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:43:28,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:43:28,610 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:43:28,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 06:43:28,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:28,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 06:43:28,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:43:28,909 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 06:43:28,909 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:43:28,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020129022] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:43:28,910 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:43:28,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [4] total 10 [2021-11-20 06:43:28,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144190375] [2021-11-20 06:43:28,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:43:28,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 06:43:28,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:43:28,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 06:43:28,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:43:28,912 INFO L87 Difference]: Start difference. First operand 225 states and 332 transitions. Second operand has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-20 06:43:29,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:43:29,170 INFO L93 Difference]: Finished difference Result 429 states and 656 transitions. [2021-11-20 06:43:29,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 06:43:29,170 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 72 [2021-11-20 06:43:29,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:43:29,173 INFO L225 Difference]: With dead ends: 429 [2021-11-20 06:43:29,174 INFO L226 Difference]: Without dead ends: 277 [2021-11-20 06:43:29,175 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-11-20 06:43:29,175 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 142 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:43:29,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 291 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 06:43:29,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-11-20 06:43:29,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 233. [2021-11-20 06:43:29,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 192 states have (on average 1.375) internal successors, (264), 203 states have internal predecessors, (264), 21 states have call successors, (21), 10 states have call predecessors, (21), 19 states have return successors, (57), 19 states have call predecessors, (57), 20 states have call successors, (57) [2021-11-20 06:43:29,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 342 transitions. [2021-11-20 06:43:29,246 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 342 transitions. Word has length 72 [2021-11-20 06:43:29,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:43:29,247 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 342 transitions. [2021-11-20 06:43:29,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-20 06:43:29,247 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 342 transitions. [2021-11-20 06:43:29,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-20 06:43:29,250 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:43:29,250 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:43:29,289 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 06:43:29,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:43:29,478 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:43:29,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:43:29,478 INFO L85 PathProgramCache]: Analyzing trace with hash 387052583, now seen corresponding path program 1 times [2021-11-20 06:43:29,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:43:29,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434710434] [2021-11-20 06:43:29,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:43:29,479 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:43:29,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:29,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:43:29,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:29,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 06:43:29,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:29,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 06:43:29,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:29,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 06:43:29,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:29,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-20 06:43:29,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:29,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-20 06:43:29,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:29,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-20 06:43:29,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:29,628 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-20 06:43:29,628 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:43:29,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434710434] [2021-11-20 06:43:29,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434710434] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:43:29,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436646686] [2021-11-20 06:43:29,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:43:29,629 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:43:29,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:43:29,634 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:43:29,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 06:43:29,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:29,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 06:43:29,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:43:29,866 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-20 06:43:29,866 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:43:29,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436646686] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:43:29,866 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:43:29,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-20 06:43:29,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149016203] [2021-11-20 06:43:29,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:43:29,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:43:29,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:43:29,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:43:29,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:43:29,869 INFO L87 Difference]: Start difference. First operand 233 states and 342 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-20 06:43:29,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:43:29,894 INFO L93 Difference]: Finished difference Result 400 states and 617 transitions. [2021-11-20 06:43:29,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:43:29,894 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 73 [2021-11-20 06:43:29,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:43:29,897 INFO L225 Difference]: With dead ends: 400 [2021-11-20 06:43:29,897 INFO L226 Difference]: Without dead ends: 234 [2021-11-20 06:43:29,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:43:29,899 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 6 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:43:29,900 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 161 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:43:29,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-11-20 06:43:29,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 185. [2021-11-20 06:43:29,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 151 states have (on average 1.3708609271523178) internal successors, (207), 159 states have internal predecessors, (207), 19 states have call successors, (19), 8 states have call predecessors, (19), 14 states have return successors, (44), 17 states have call predecessors, (44), 18 states have call successors, (44) [2021-11-20 06:43:29,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 270 transitions. [2021-11-20 06:43:29,918 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 270 transitions. Word has length 73 [2021-11-20 06:43:29,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:43:29,919 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 270 transitions. [2021-11-20 06:43:29,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-20 06:43:29,919 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 270 transitions. [2021-11-20 06:43:29,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-20 06:43:29,921 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:43:29,922 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:43:29,960 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-20 06:43:30,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:43:30,140 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:43:30,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:43:30,140 INFO L85 PathProgramCache]: Analyzing trace with hash -186702901, now seen corresponding path program 1 times [2021-11-20 06:43:30,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:43:30,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634235470] [2021-11-20 06:43:30,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:43:30,141 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:43:30,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:30,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:43:30,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:30,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 06:43:30,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:30,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-20 06:43:30,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:30,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:43:30,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:30,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-20 06:43:30,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:30,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-20 06:43:30,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:30,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-11-20 06:43:30,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:30,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-11-20 06:43:30,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:30,328 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-20 06:43:30,328 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:43:30,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634235470] [2021-11-20 06:43:30,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634235470] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:43:30,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280642776] [2021-11-20 06:43:30,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:43:30,329 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:43:30,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:43:30,334 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:43:30,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 06:43:30,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:30,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-20 06:43:30,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:43:30,576 INFO L354 Elim1Store]: treesize reduction 19, result has 50.0 percent of original size [2021-11-20 06:43:30,576 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 1 case distinctions, treesize of input 63 treesize of output 58 [2021-11-20 06:43:30,601 INFO L354 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2021-11-20 06:43:30,601 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 1 case distinctions, treesize of input 73 treesize of output 54 [2021-11-20 06:43:37,514 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 28 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 06:43:37,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:43:38,533 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-20 06:43:38,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280642776] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:43:38,534 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:43:38,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 15, 10] total 28 [2021-11-20 06:43:38,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111796069] [2021-11-20 06:43:38,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:43:38,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-20 06:43:38,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:43:38,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-20 06:43:38,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=657, Unknown=0, NotChecked=0, Total=756 [2021-11-20 06:43:38,536 INFO L87 Difference]: Start difference. First operand 185 states and 270 transitions. Second operand has 28 states, 27 states have (on average 4.666666666666667) internal successors, (126), 24 states have internal predecessors, (126), 11 states have call successors, (22), 5 states have call predecessors, (22), 9 states have return successors, (22), 10 states have call predecessors, (22), 11 states have call successors, (22) [2021-11-20 06:43:39,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:43:39,220 INFO L93 Difference]: Finished difference Result 399 states and 595 transitions. [2021-11-20 06:43:39,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-20 06:43:39,221 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 4.666666666666667) internal successors, (126), 24 states have internal predecessors, (126), 11 states have call successors, (22), 5 states have call predecessors, (22), 9 states have return successors, (22), 10 states have call predecessors, (22), 11 states have call successors, (22) Word has length 83 [2021-11-20 06:43:39,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:43:39,224 INFO L225 Difference]: With dead ends: 399 [2021-11-20 06:43:39,224 INFO L226 Difference]: Without dead ends: 254 [2021-11-20 06:43:39,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 159 SyntacticMatches, 7 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=193, Invalid=1447, Unknown=0, NotChecked=0, Total=1640 [2021-11-20 06:43:39,226 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 113 mSDsluCounter, 1031 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 1105 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:43:39,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 1105 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 170 Invalid, 0 Unknown, 73 Unchecked, 0.2s Time] [2021-11-20 06:43:39,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-11-20 06:43:39,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 202. [2021-11-20 06:43:39,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 165 states have (on average 1.3454545454545455) internal successors, (222), 173 states have internal predecessors, (222), 21 states have call successors, (21), 9 states have call predecessors, (21), 15 states have return successors, (46), 19 states have call predecessors, (46), 20 states have call successors, (46) [2021-11-20 06:43:39,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 289 transitions. [2021-11-20 06:43:39,248 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 289 transitions. Word has length 83 [2021-11-20 06:43:39,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:43:39,248 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 289 transitions. [2021-11-20 06:43:39,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 4.666666666666667) internal successors, (126), 24 states have internal predecessors, (126), 11 states have call successors, (22), 5 states have call predecessors, (22), 9 states have return successors, (22), 10 states have call predecessors, (22), 11 states have call successors, (22) [2021-11-20 06:43:39,249 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 289 transitions. [2021-11-20 06:43:39,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-20 06:43:39,251 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:43:39,251 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:43:39,286 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-20 06:43:39,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-20 06:43:39,466 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:43:39,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:43:39,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1786751690, now seen corresponding path program 1 times [2021-11-20 06:43:39,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:43:39,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832198632] [2021-11-20 06:43:39,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:43:39,466 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:43:39,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:39,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:43:39,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:39,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 06:43:39,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:39,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 06:43:39,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:39,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:43:39,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:39,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-20 06:43:39,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:39,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-20 06:43:39,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:39,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-11-20 06:43:39,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:39,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-11-20 06:43:39,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:39,697 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-20 06:43:39,697 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:43:39,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832198632] [2021-11-20 06:43:39,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832198632] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:43:39,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243150754] [2021-11-20 06:43:39,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:43:39,698 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:43:39,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:43:39,702 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:43:39,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-20 06:43:39,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:39,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-20 06:43:39,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:43:39,868 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-20 06:43:39,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 50 [2021-11-20 06:43:39,900 INFO L354 Elim1Store]: treesize reduction 31, result has 50.0 percent of original size [2021-11-20 06:43:39,901 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 1 case distinctions, treesize of input 71 treesize of output 54 [2021-11-20 06:43:41,925 WARN L860 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| Int)) (let ((.cse1 (+ |ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base|) .cse1)) (.cse2 (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base|) .cse1))) (and (or (and (= |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base| .cse0) (= .cse1 .cse2)) (= (+ |ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 16) (select (select |c_#memory_$Pointer$.offset| .cse0) .cse2))) (= |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base| (select (select |c_#memory_$Pointer$.base| .cse0) .cse2)))))) is different from true [2021-11-20 06:43:43,320 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 26 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-20 06:43:43,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:43:45,812 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-20 06:43:45,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243150754] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:43:45,812 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:43:45,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 14, 8] total 24 [2021-11-20 06:43:45,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948815505] [2021-11-20 06:43:45,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:43:45,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-20 06:43:45,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:43:45,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-20 06:43:45,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=439, Unknown=2, NotChecked=42, Total=552 [2021-11-20 06:43:45,815 INFO L87 Difference]: Start difference. First operand 202 states and 289 transitions. Second operand has 24 states, 24 states have (on average 4.041666666666667) internal successors, (97), 22 states have internal predecessors, (97), 6 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (17), 5 states have call predecessors, (17), 6 states have call successors, (17) [2021-11-20 06:43:48,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:43:48,297 INFO L93 Difference]: Finished difference Result 496 states and 744 transitions. [2021-11-20 06:43:48,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-20 06:43:48,298 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.041666666666667) internal successors, (97), 22 states have internal predecessors, (97), 6 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (17), 5 states have call predecessors, (17), 6 states have call successors, (17) Word has length 83 [2021-11-20 06:43:48,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:43:48,303 INFO L225 Difference]: With dead ends: 496 [2021-11-20 06:43:48,303 INFO L226 Difference]: Without dead ends: 365 [2021-11-20 06:43:48,304 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 170 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=103, Invalid=710, Unknown=3, NotChecked=54, Total=870 [2021-11-20 06:43:48,307 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 86 mSDsluCounter, 1079 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 1158 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 348 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:43:48,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 1158 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 194 Invalid, 0 Unknown, 348 Unchecked, 0.2s Time] [2021-11-20 06:43:48,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-11-20 06:43:48,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 318. [2021-11-20 06:43:48,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 263 states have (on average 1.3155893536121672) internal successors, (346), 280 states have internal predecessors, (346), 31 states have call successors, (31), 12 states have call predecessors, (31), 23 states have return successors, (88), 25 states have call predecessors, (88), 30 states have call successors, (88) [2021-11-20 06:43:48,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 465 transitions. [2021-11-20 06:43:48,347 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 465 transitions. Word has length 83 [2021-11-20 06:43:48,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:43:48,348 INFO L470 AbstractCegarLoop]: Abstraction has 318 states and 465 transitions. [2021-11-20 06:43:48,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.041666666666667) internal successors, (97), 22 states have internal predecessors, (97), 6 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (17), 5 states have call predecessors, (17), 6 states have call successors, (17) [2021-11-20 06:43:48,348 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 465 transitions. [2021-11-20 06:43:48,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-20 06:43:48,352 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:43:48,352 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:43:48,394 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-20 06:43:48,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:43:48,573 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:43:48,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:43:48,574 INFO L85 PathProgramCache]: Analyzing trace with hash -1309287432, now seen corresponding path program 1 times [2021-11-20 06:43:48,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:43:48,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092649181] [2021-11-20 06:43:48,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:43:48,574 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:43:48,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:48,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:43:48,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:48,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 06:43:48,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:48,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-20 06:43:48,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:48,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:43:48,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:48,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-20 06:43:48,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:48,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-20 06:43:48,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:48,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-20 06:43:48,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:48,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-20 06:43:48,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:48,720 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-20 06:43:48,720 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:43:48,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092649181] [2021-11-20 06:43:48,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092649181] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:43:48,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163586744] [2021-11-20 06:43:48,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:43:48,721 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:43:48,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:43:48,722 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:43:48,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-20 06:43:48,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:48,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:43:48,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:43:48,971 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-20 06:43:48,971 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:43:48,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163586744] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:43:48,972 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:43:48,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2021-11-20 06:43:48,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118853690] [2021-11-20 06:43:48,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:43:48,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:43:48,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:43:48,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:43:48,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:43:48,974 INFO L87 Difference]: Start difference. First operand 318 states and 465 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-20 06:43:49,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:43:49,025 INFO L93 Difference]: Finished difference Result 498 states and 747 transitions. [2021-11-20 06:43:49,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:43:49,026 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 85 [2021-11-20 06:43:49,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:43:49,029 INFO L225 Difference]: With dead ends: 498 [2021-11-20 06:43:49,029 INFO L226 Difference]: Without dead ends: 319 [2021-11-20 06:43:49,031 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:43:49,031 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 8 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:43:49,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 242 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:43:49,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-11-20 06:43:49,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 318. [2021-11-20 06:43:49,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 263 states have (on average 1.296577946768061) internal successors, (341), 280 states have internal predecessors, (341), 31 states have call successors, (31), 12 states have call predecessors, (31), 23 states have return successors, (88), 25 states have call predecessors, (88), 30 states have call successors, (88) [2021-11-20 06:43:49,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 460 transitions. [2021-11-20 06:43:49,058 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 460 transitions. Word has length 85 [2021-11-20 06:43:49,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:43:49,059 INFO L470 AbstractCegarLoop]: Abstraction has 318 states and 460 transitions. [2021-11-20 06:43:49,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-20 06:43:49,059 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 460 transitions. [2021-11-20 06:43:49,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-20 06:43:49,062 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:43:49,062 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:43:49,100 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-20 06:43:49,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-20 06:43:49,289 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:43:49,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:43:49,290 INFO L85 PathProgramCache]: Analyzing trace with hash 652287226, now seen corresponding path program 1 times [2021-11-20 06:43:49,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:43:49,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745864526] [2021-11-20 06:43:49,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:43:49,290 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:43:49,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:49,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:43:49,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:49,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 06:43:49,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:49,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-20 06:43:49,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:49,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:43:49,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:49,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-20 06:43:49,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:49,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-20 06:43:49,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:49,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-20 06:43:49,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:49,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-20 06:43:49,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:49,407 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-20 06:43:49,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:43:49,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745864526] [2021-11-20 06:43:49,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745864526] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:43:49,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453770334] [2021-11-20 06:43:49,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:43:49,408 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:43:49,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:43:49,413 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:43:49,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-20 06:43:49,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:49,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:43:49,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:43:49,651 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-20 06:43:49,652 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:43:49,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453770334] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:43:49,652 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:43:49,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2021-11-20 06:43:49,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57168595] [2021-11-20 06:43:49,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:43:49,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:43:49,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:43:49,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:43:49,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:43:49,655 INFO L87 Difference]: Start difference. First operand 318 states and 460 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-20 06:43:49,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:43:49,693 INFO L93 Difference]: Finished difference Result 448 states and 670 transitions. [2021-11-20 06:43:49,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:43:49,693 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 85 [2021-11-20 06:43:49,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:43:49,695 INFO L225 Difference]: With dead ends: 448 [2021-11-20 06:43:49,695 INFO L226 Difference]: Without dead ends: 181 [2021-11-20 06:43:49,697 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:43:49,698 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 2 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:43:49,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 235 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:43:49,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-11-20 06:43:49,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 157. [2021-11-20 06:43:49,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 125 states have (on average 1.232) internal successors, (154), 130 states have internal predecessors, (154), 18 states have call successors, (18), 9 states have call predecessors, (18), 13 states have return successors, (34), 17 states have call predecessors, (34), 17 states have call successors, (34) [2021-11-20 06:43:49,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 206 transitions. [2021-11-20 06:43:49,711 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 206 transitions. Word has length 85 [2021-11-20 06:43:49,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:43:49,711 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 206 transitions. [2021-11-20 06:43:49,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-20 06:43:49,711 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 206 transitions. [2021-11-20 06:43:49,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-20 06:43:49,713 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:43:49,713 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:43:49,748 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-20 06:43:49,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-20 06:43:49,937 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:43:49,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:43:49,938 INFO L85 PathProgramCache]: Analyzing trace with hash 340955510, now seen corresponding path program 1 times [2021-11-20 06:43:49,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:43:49,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236950661] [2021-11-20 06:43:49,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:43:49,938 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:43:49,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:49,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:43:49,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:49,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 06:43:49,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:49,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 06:43:49,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:50,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:43:50,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:50,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-20 06:43:50,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:50,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-20 06:43:50,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:50,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-11-20 06:43:50,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:50,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-11-20 06:43:50,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:50,050 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-20 06:43:50,051 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:43:50,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236950661] [2021-11-20 06:43:50,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236950661] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:43:50,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545714789] [2021-11-20 06:43:50,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:43:50,052 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:43:50,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:43:50,053 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:43:50,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-20 06:43:50,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:50,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:43:50,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:43:50,335 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-20 06:43:50,336 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:43:50,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545714789] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:43:50,336 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:43:50,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2021-11-20 06:43:50,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626443487] [2021-11-20 06:43:50,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:43:50,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:43:50,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:43:50,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:43:50,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:43:50,338 INFO L87 Difference]: Start difference. First operand 157 states and 206 transitions. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-20 06:43:50,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:43:50,364 INFO L93 Difference]: Finished difference Result 272 states and 370 transitions. [2021-11-20 06:43:50,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:43:50,364 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 83 [2021-11-20 06:43:50,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:43:50,366 INFO L225 Difference]: With dead ends: 272 [2021-11-20 06:43:50,366 INFO L226 Difference]: Without dead ends: 142 [2021-11-20 06:43:50,367 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:43:50,368 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 10 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:43:50,368 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 245 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:43:50,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-11-20 06:43:50,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 132. [2021-11-20 06:43:50,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 102 states have (on average 1.196078431372549) internal successors, (122), 106 states have internal predecessors, (122), 17 states have call successors, (17), 9 states have call predecessors, (17), 12 states have return successors, (31), 16 states have call predecessors, (31), 16 states have call successors, (31) [2021-11-20 06:43:50,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 170 transitions. [2021-11-20 06:43:50,382 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 170 transitions. Word has length 83 [2021-11-20 06:43:50,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:43:50,383 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 170 transitions. [2021-11-20 06:43:50,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-20 06:43:50,384 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 170 transitions. [2021-11-20 06:43:50,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-20 06:43:50,385 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:43:50,385 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:43:50,422 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-20 06:43:50,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-20 06:43:50,601 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:43:50,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:43:50,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1911369352, now seen corresponding path program 1 times [2021-11-20 06:43:50,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:43:50,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878693720] [2021-11-20 06:43:50,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:43:50,602 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:43:50,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:50,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:43:50,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:50,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 06:43:50,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:50,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 06:43:50,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:50,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:43:50,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:50,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-20 06:43:50,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:50,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-20 06:43:50,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:50,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-20 06:43:50,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:50,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-11-20 06:43:50,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:50,746 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-20 06:43:50,746 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:43:50,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878693720] [2021-11-20 06:43:50,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878693720] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:43:50,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478081690] [2021-11-20 06:43:50,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:43:50,747 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:43:50,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:43:50,748 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:43:50,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-20 06:43:50,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:50,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-20 06:43:50,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:43:50,974 INFO L354 Elim1Store]: treesize reduction 19, result has 50.0 percent of original size [2021-11-20 06:43:50,974 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 1 case distinctions, treesize of input 63 treesize of output 58 [2021-11-20 06:43:50,988 INFO L354 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2021-11-20 06:43:50,988 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 1 case distinctions, treesize of input 73 treesize of output 54 [2021-11-20 06:43:57,634 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 28 proven. 12 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 06:43:57,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:43:58,433 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-20 06:43:58,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478081690] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:43:58,433 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:43:58,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 15, 10] total 27 [2021-11-20 06:43:58,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383164325] [2021-11-20 06:43:58,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:43:58,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-20 06:43:58,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:43:58,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-20 06:43:58,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2021-11-20 06:43:58,436 INFO L87 Difference]: Start difference. First operand 132 states and 170 transitions. Second operand has 27 states, 26 states have (on average 4.961538461538462) internal successors, (129), 23 states have internal predecessors, (129), 11 states have call successors, (22), 5 states have call predecessors, (22), 9 states have return successors, (22), 10 states have call predecessors, (22), 11 states have call successors, (22) [2021-11-20 06:43:59,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:43:59,015 INFO L93 Difference]: Finished difference Result 305 states and 382 transitions. [2021-11-20 06:43:59,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-20 06:43:59,016 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 4.961538461538462) internal successors, (129), 23 states have internal predecessors, (129), 11 states have call successors, (22), 5 states have call predecessors, (22), 9 states have return successors, (22), 10 states have call predecessors, (22), 11 states have call successors, (22) Word has length 84 [2021-11-20 06:43:59,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:43:59,018 INFO L225 Difference]: With dead ends: 305 [2021-11-20 06:43:59,018 INFO L226 Difference]: Without dead ends: 196 [2021-11-20 06:43:59,019 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 161 SyntacticMatches, 7 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=208, Invalid=1514, Unknown=0, NotChecked=0, Total=1722 [2021-11-20 06:43:59,020 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 125 mSDsluCounter, 1032 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 1111 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 210 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:43:59,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 1111 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 148 Invalid, 0 Unknown, 210 Unchecked, 0.1s Time] [2021-11-20 06:43:59,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-11-20 06:43:59,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 170. [2021-11-20 06:43:59,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 138 states have (on average 1.2391304347826086) internal successors, (171), 140 states have internal predecessors, (171), 17 states have call successors, (17), 13 states have call predecessors, (17), 14 states have return successors, (23), 16 states have call predecessors, (23), 16 states have call successors, (23) [2021-11-20 06:43:59,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 211 transitions. [2021-11-20 06:43:59,033 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 211 transitions. Word has length 84 [2021-11-20 06:43:59,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:43:59,034 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 211 transitions. [2021-11-20 06:43:59,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 4.961538461538462) internal successors, (129), 23 states have internal predecessors, (129), 11 states have call successors, (22), 5 states have call predecessors, (22), 9 states have return successors, (22), 10 states have call predecessors, (22), 11 states have call successors, (22) [2021-11-20 06:43:59,034 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 211 transitions. [2021-11-20 06:43:59,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-20 06:43:59,036 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:43:59,036 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:43:59,074 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-20 06:43:59,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:43:59,253 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:43:59,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:43:59,253 INFO L85 PathProgramCache]: Analyzing trace with hash 1135728258, now seen corresponding path program 1 times [2021-11-20 06:43:59,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:43:59,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718577257] [2021-11-20 06:43:59,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:43:59,254 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:43:59,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:59,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:43:59,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:59,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 06:43:59,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:59,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 06:43:59,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:59,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:43:59,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:59,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-20 06:43:59,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:59,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-20 06:43:59,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:59,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-11-20 06:43:59,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:59,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-11-20 06:43:59,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:59,506 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-20 06:43:59,506 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:43:59,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718577257] [2021-11-20 06:43:59,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718577257] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:43:59,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661184358] [2021-11-20 06:43:59,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:43:59,507 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:43:59,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:43:59,508 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:43:59,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-20 06:43:59,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:59,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 06:43:59,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:43:59,844 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 06:43:59,844 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:43:59,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661184358] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:43:59,844 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:43:59,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 17 [2021-11-20 06:43:59,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410204060] [2021-11-20 06:43:59,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:43:59,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 06:43:59,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:43:59,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 06:43:59,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-11-20 06:43:59,845 INFO L87 Difference]: Start difference. First operand 170 states and 211 transitions. Second operand has 8 states, 7 states have (on average 9.285714285714286) internal successors, (65), 8 states have internal predecessors, (65), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-20 06:44:00,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:44:00,002 INFO L93 Difference]: Finished difference Result 265 states and 330 transitions. [2021-11-20 06:44:00,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 06:44:00,003 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.285714285714286) internal successors, (65), 8 states have internal predecessors, (65), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 86 [2021-11-20 06:44:00,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:44:00,004 INFO L225 Difference]: With dead ends: 265 [2021-11-20 06:44:00,004 INFO L226 Difference]: Without dead ends: 172 [2021-11-20 06:44:00,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-11-20 06:44:00,005 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 105 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:44:00,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 300 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:44:00,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-11-20 06:44:00,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 170. [2021-11-20 06:44:00,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 138 states have (on average 1.2246376811594204) internal successors, (169), 140 states have internal predecessors, (169), 17 states have call successors, (17), 13 states have call predecessors, (17), 14 states have return successors, (23), 16 states have call predecessors, (23), 16 states have call successors, (23) [2021-11-20 06:44:00,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 209 transitions. [2021-11-20 06:44:00,018 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 209 transitions. Word has length 86 [2021-11-20 06:44:00,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:44:00,018 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 209 transitions. [2021-11-20 06:44:00,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.285714285714286) internal successors, (65), 8 states have internal predecessors, (65), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-20 06:44:00,018 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 209 transitions. [2021-11-20 06:44:00,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-20 06:44:00,020 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:44:00,020 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:44:00,052 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-20 06:44:00,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:44:00,233 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:44:00,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:44:00,233 INFO L85 PathProgramCache]: Analyzing trace with hash -919871633, now seen corresponding path program 1 times [2021-11-20 06:44:00,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:44:00,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003838920] [2021-11-20 06:44:00,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:44:00,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:44:00,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:44:00,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:44:00,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:44:00,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 06:44:00,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:44:00,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 06:44:00,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:44:00,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:44:00,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:44:00,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-20 06:44:00,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:44:00,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-20 06:44:00,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:44:00,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-11-20 06:44:00,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:44:00,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-11-20 06:44:00,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:44:00,497 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-20 06:44:00,498 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:44:00,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003838920] [2021-11-20 06:44:00,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003838920] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:44:00,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924932721] [2021-11-20 06:44:00,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:44:00,499 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:44:00,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:44:00,502 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:44:00,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-20 06:44:00,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:44:00,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 06:44:00,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:44:00,888 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 06:44:00,889 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:44:00,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924932721] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:44:00,889 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:44:00,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [12] total 19 [2021-11-20 06:44:00,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920439225] [2021-11-20 06:44:00,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:44:00,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 06:44:00,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:44:00,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 06:44:00,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-11-20 06:44:00,891 INFO L87 Difference]: Start difference. First operand 170 states and 209 transitions. Second operand has 9 states, 8 states have (on average 8.375) internal successors, (67), 9 states have internal predecessors, (67), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-20 06:44:01,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:44:01,144 INFO L93 Difference]: Finished difference Result 275 states and 341 transitions. [2021-11-20 06:44:01,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 06:44:01,145 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 8.375) internal successors, (67), 9 states have internal predecessors, (67), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 88 [2021-11-20 06:44:01,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:44:01,146 INFO L225 Difference]: With dead ends: 275 [2021-11-20 06:44:01,147 INFO L226 Difference]: Without dead ends: 180 [2021-11-20 06:44:01,149 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-11-20 06:44:01,151 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 125 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:44:01,151 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 348 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 06:44:01,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-11-20 06:44:01,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 167. [2021-11-20 06:44:01,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 135 states have (on average 1.2148148148148148) internal successors, (164), 137 states have internal predecessors, (164), 17 states have call successors, (17), 13 states have call predecessors, (17), 14 states have return successors, (23), 16 states have call predecessors, (23), 16 states have call successors, (23) [2021-11-20 06:44:01,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 204 transitions. [2021-11-20 06:44:01,164 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 204 transitions. Word has length 88 [2021-11-20 06:44:01,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:44:01,164 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 204 transitions. [2021-11-20 06:44:01,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 8.375) internal successors, (67), 9 states have internal predecessors, (67), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-20 06:44:01,164 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 204 transitions. [2021-11-20 06:44:01,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-20 06:44:01,168 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:44:01,168 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:44:01,200 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-11-20 06:44:01,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-20 06:44:01,381 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:44:01,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:44:01,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1613305023, now seen corresponding path program 1 times [2021-11-20 06:44:01,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:44:01,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082532829] [2021-11-20 06:44:01,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:44:01,382 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:44:01,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:44:01,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:44:01,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:44:01,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 06:44:01,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:44:01,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 06:44:01,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:44:01,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:44:01,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:44:01,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-20 06:44:01,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:44:01,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-20 06:44:01,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:44:01,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:44:01,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:44:01,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-11-20 06:44:01,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:44:01,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-11-20 06:44:01,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:44:01,549 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-20 06:44:01,549 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:44:01,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082532829] [2021-11-20 06:44:01,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082532829] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:44:01,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367619721] [2021-11-20 06:44:01,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:44:01,550 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:44:01,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:44:01,551 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:44:01,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-20 06:44:01,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:44:01,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-20 06:44:01,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:44:01,988 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 31 proven. 3 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-20 06:44:01,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:44:02,312 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-20 06:44:02,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367619721] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:44:02,312 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:44:02,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 13, 7] total 18 [2021-11-20 06:44:02,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530325387] [2021-11-20 06:44:02,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:44:02,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 06:44:02,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:44:02,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 06:44:02,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-11-20 06:44:02,315 INFO L87 Difference]: Start difference. First operand 167 states and 204 transitions. Second operand has 18 states, 15 states have (on average 4.8) internal successors, (72), 14 states have internal predecessors, (72), 5 states have call successors, (12), 2 states have call predecessors, (12), 8 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2021-11-20 06:44:02,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:44:02,500 INFO L93 Difference]: Finished difference Result 263 states and 327 transitions. [2021-11-20 06:44:02,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-20 06:44:02,501 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 4.8) internal successors, (72), 14 states have internal predecessors, (72), 5 states have call successors, (12), 2 states have call predecessors, (12), 8 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) Word has length 97 [2021-11-20 06:44:02,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:44:02,502 INFO L225 Difference]: With dead ends: 263 [2021-11-20 06:44:02,502 INFO L226 Difference]: Without dead ends: 179 [2021-11-20 06:44:02,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2021-11-20 06:44:02,504 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 13 mSDsluCounter, 1068 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 1147 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:44:02,505 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 1147 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:44:02,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-11-20 06:44:02,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 163. [2021-11-20 06:44:02,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 132 states have (on average 1.2045454545454546) internal successors, (159), 134 states have internal predecessors, (159), 17 states have call successors, (17), 13 states have call predecessors, (17), 13 states have return successors, (22), 15 states have call predecessors, (22), 16 states have call successors, (22) [2021-11-20 06:44:02,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 198 transitions. [2021-11-20 06:44:02,518 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 198 transitions. Word has length 97 [2021-11-20 06:44:02,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:44:02,519 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 198 transitions. [2021-11-20 06:44:02,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 4.8) internal successors, (72), 14 states have internal predecessors, (72), 5 states have call successors, (12), 2 states have call predecessors, (12), 8 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2021-11-20 06:44:02,519 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 198 transitions. [2021-11-20 06:44:02,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-20 06:44:02,520 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:44:02,521 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:44:02,560 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-20 06:44:02,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-20 06:44:02,745 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:44:02,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:44:02,746 INFO L85 PathProgramCache]: Analyzing trace with hash 2047426688, now seen corresponding path program 1 times [2021-11-20 06:44:02,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:44:02,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911636150] [2021-11-20 06:44:02,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:44:02,746 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:44:02,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:44:02,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:44:02,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:44:02,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 06:44:02,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:44:02,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 06:44:02,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:44:03,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:44:03,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:44:03,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-20 06:44:03,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:44:03,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-20 06:44:03,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:44:03,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:44:03,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:44:03,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-20 06:44:03,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:44:03,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-20 06:44:03,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:44:03,163 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-20 06:44:03,163 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:44:03,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911636150] [2021-11-20 06:44:03,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911636150] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:44:03,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712750558] [2021-11-20 06:44:03,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:44:03,164 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:44:03,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:44:03,169 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:44:03,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-20 06:44:03,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:44:03,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-20 06:44:03,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:44:03,410 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-20 06:44:03,410 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 1 case distinctions, treesize of input 14 treesize of output 15 [2021-11-20 06:44:04,954 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 33 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 06:44:04,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:44:05,483 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 96 treesize of output 90 [2021-11-20 06:44:05,661 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 10 proven. 33 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-20 06:44:05,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712750558] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:44:05,662 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:44:05,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16, 13] total 30 [2021-11-20 06:44:05,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505531780] [2021-11-20 06:44:05,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:44:05,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-20 06:44:05,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:44:05,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-20 06:44:05,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=761, Unknown=0, NotChecked=0, Total=870 [2021-11-20 06:44:05,663 INFO L87 Difference]: Start difference. First operand 163 states and 198 transitions. Second operand has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 28 states have internal predecessors, (152), 14 states have call successors, (21), 4 states have call predecessors, (21), 8 states have return successors, (20), 12 states have call predecessors, (20), 13 states have call successors, (20) [2021-11-20 06:44:06,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:44:06,705 INFO L93 Difference]: Finished difference Result 388 states and 478 transitions. [2021-11-20 06:44:06,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-20 06:44:06,706 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 28 states have internal predecessors, (152), 14 states have call successors, (21), 4 states have call predecessors, (21), 8 states have return successors, (20), 12 states have call predecessors, (20), 13 states have call successors, (20) Word has length 100 [2021-11-20 06:44:06,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:44:06,708 INFO L225 Difference]: With dead ends: 388 [2021-11-20 06:44:06,708 INFO L226 Difference]: Without dead ends: 322 [2021-11-20 06:44:06,710 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 202 SyntacticMatches, 9 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 658 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=346, Invalid=2306, Unknown=0, NotChecked=0, Total=2652 [2021-11-20 06:44:06,710 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 130 mSDsluCounter, 1001 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 1101 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 167 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:44:06,711 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 1101 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 366 Invalid, 0 Unknown, 167 Unchecked, 0.3s Time] [2021-11-20 06:44:06,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-11-20 06:44:06,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 307. [2021-11-20 06:44:06,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 248 states have (on average 1.2056451612903225) internal successors, (299), 253 states have internal predecessors, (299), 32 states have call successors, (32), 24 states have call predecessors, (32), 26 states have return successors, (45), 29 states have call predecessors, (45), 31 states have call successors, (45) [2021-11-20 06:44:06,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 376 transitions. [2021-11-20 06:44:06,737 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 376 transitions. Word has length 100 [2021-11-20 06:44:06,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:44:06,737 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 376 transitions. [2021-11-20 06:44:06,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 28 states have internal predecessors, (152), 14 states have call successors, (21), 4 states have call predecessors, (21), 8 states have return successors, (20), 12 states have call predecessors, (20), 13 states have call successors, (20) [2021-11-20 06:44:06,738 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 376 transitions. [2021-11-20 06:44:06,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-20 06:44:06,739 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:44:06,739 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:44:06,773 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-20 06:44:06,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-20 06:44:06,953 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:44:06,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:44:06,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1654399678, now seen corresponding path program 1 times [2021-11-20 06:44:06,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:44:06,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129024760] [2021-11-20 06:44:06,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:44:06,954 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:44:07,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:44:07,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:44:07,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:44:07,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 06:44:07,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:44:07,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 06:44:07,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:44:07,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:44:07,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:44:07,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-20 06:44:07,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:44:07,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-20 06:44:07,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:44:07,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:44:07,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:44:07,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-20 06:44:07,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:44:07,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-20 06:44:07,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:44:07,434 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 7 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-20 06:44:07,434 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:44:07,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129024760] [2021-11-20 06:44:07,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129024760] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:44:07,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051320328] [2021-11-20 06:44:07,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:44:07,435 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:44:07,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:44:07,438 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:44:07,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-20 06:44:07,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:44:07,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-20 06:44:07,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:44:07,655 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-20 06:44:07,655 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 1 case distinctions, treesize of input 63 treesize of output 50 [2021-11-20 06:44:07,683 INFO L354 Elim1Store]: treesize reduction 31, result has 50.0 percent of original size [2021-11-20 06:44:07,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 54 [2021-11-20 06:44:16,557 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 32 proven. 28 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 06:44:16,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:44:19,235 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 10 proven. 33 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-20 06:44:19,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051320328] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:44:19,236 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:44:19,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 12] total 33 [2021-11-20 06:44:19,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094891295] [2021-11-20 06:44:19,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:44:19,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-20 06:44:19,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:44:19,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-20 06:44:19,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=915, Unknown=1, NotChecked=0, Total=1056 [2021-11-20 06:44:19,238 INFO L87 Difference]: Start difference. First operand 307 states and 376 transitions. Second operand has 33 states, 33 states have (on average 4.696969696969697) internal successors, (155), 30 states have internal predecessors, (155), 13 states have call successors, (24), 5 states have call predecessors, (24), 7 states have return successors, (24), 12 states have call predecessors, (24), 12 states have call successors, (24) [2021-11-20 06:44:20,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:44:20,244 INFO L93 Difference]: Finished difference Result 472 states and 579 transitions. [2021-11-20 06:44:20,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-20 06:44:20,245 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 4.696969696969697) internal successors, (155), 30 states have internal predecessors, (155), 13 states have call successors, (24), 5 states have call predecessors, (24), 7 states have return successors, (24), 12 states have call predecessors, (24), 12 states have call successors, (24) Word has length 100 [2021-11-20 06:44:20,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:44:20,248 INFO L225 Difference]: With dead ends: 472 [2021-11-20 06:44:20,250 INFO L226 Difference]: Without dead ends: 397 [2021-11-20 06:44:20,252 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 202 SyntacticMatches, 7 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=303, Invalid=2048, Unknown=1, NotChecked=0, Total=2352 [2021-11-20 06:44:20,254 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 190 mSDsluCounter, 1168 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 1259 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 179 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:44:20,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 1259 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 144 Invalid, 0 Unknown, 179 Unchecked, 0.2s Time] [2021-11-20 06:44:20,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-11-20 06:44:20,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 359. [2021-11-20 06:44:20,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 291 states have (on average 1.2130584192439862) internal successors, (353), 297 states have internal predecessors, (353), 35 states have call successors, (35), 28 states have call predecessors, (35), 32 states have return successors, (49), 33 states have call predecessors, (49), 34 states have call successors, (49) [2021-11-20 06:44:20,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 437 transitions. [2021-11-20 06:44:20,294 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 437 transitions. Word has length 100 [2021-11-20 06:44:20,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:44:20,295 INFO L470 AbstractCegarLoop]: Abstraction has 359 states and 437 transitions. [2021-11-20 06:44:20,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.696969696969697) internal successors, (155), 30 states have internal predecessors, (155), 13 states have call successors, (24), 5 states have call predecessors, (24), 7 states have return successors, (24), 12 states have call predecessors, (24), 12 states have call successors, (24) [2021-11-20 06:44:20,295 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 437 transitions. [2021-11-20 06:44:20,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-20 06:44:20,298 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:44:20,298 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:44:20,337 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-20 06:44:20,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-20 06:44:20,506 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:44:20,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:44:20,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1912565116, now seen corresponding path program 1 times [2021-11-20 06:44:20,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:44:20,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623816311] [2021-11-20 06:44:20,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:44:20,506 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:44:20,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:44:20,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:44:20,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:44:20,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 06:44:20,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:44:20,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 06:44:20,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:44:20,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:44:20,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:44:20,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-20 06:44:20,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:44:20,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-20 06:44:20,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:44:20,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:44:20,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:44:20,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-20 06:44:20,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:44:20,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-20 06:44:20,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:44:20,835 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 10 proven. 34 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-20 06:44:20,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:44:20,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623816311] [2021-11-20 06:44:20,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623816311] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:44:20,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265685300] [2021-11-20 06:44:20,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:44:20,836 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:44:20,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:44:20,838 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:44:20,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-20 06:44:20,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:44:20,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 60 conjunts are in the unsatisfiable core [2021-11-20 06:44:20,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:44:21,074 INFO L354 Elim1Store]: treesize reduction 19, result has 50.0 percent of original size [2021-11-20 06:44:21,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 29 [2021-11-20 06:44:35,140 WARN L227 SmtUtils]: Spent 10.02s on a formula simplification that was a NOOP. DAG size: 21 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:45:03,460 WARN L227 SmtUtils]: Spent 8.04s on a formula simplification that was a NOOP. DAG size: 17 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:45:13,913 WARN L227 SmtUtils]: Spent 8.38s on a formula simplification that was a NOOP. DAG size: 24 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:45:22,559 WARN L227 SmtUtils]: Spent 6.50s on a formula simplification that was a NOOP. DAG size: 24 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:45:28,665 WARN L227 SmtUtils]: Spent 6.05s on a formula simplification that was a NOOP. DAG size: 26 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:45:38,852 WARN L227 SmtUtils]: Spent 10.03s on a formula simplification that was a NOOP. DAG size: 26 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:45:48,929 WARN L227 SmtUtils]: Spent 10.02s on a formula simplification that was a NOOP. DAG size: 24 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:46:05,146 WARN L227 SmtUtils]: Spent 16.09s on a formula simplification. DAG size of input: 33 DAG size of output: 24 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:46:15,467 WARN L227 SmtUtils]: Spent 10.02s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:46:17,419 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 21 proven. 41 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 06:46:17,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:46:32,183 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 177 treesize of output 169 [2021-11-20 06:46:32,329 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 10 proven. 35 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-20 06:46:32,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265685300] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:46:32,329 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:46:32,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 18, 15] total 38 [2021-11-20 06:46:32,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461129055] [2021-11-20 06:46:32,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:46:32,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-20 06:46:32,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:46:32,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-20 06:46:32,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1235, Unknown=21, NotChecked=0, Total=1406 [2021-11-20 06:46:32,332 INFO L87 Difference]: Start difference. First operand 359 states and 437 transitions. Second operand has 38 states, 38 states have (on average 4.2368421052631575) internal successors, (161), 36 states have internal predecessors, (161), 15 states have call successors, (23), 4 states have call predecessors, (23), 8 states have return successors, (22), 13 states have call predecessors, (22), 14 states have call successors, (22) [2021-11-20 06:46:42,456 WARN L227 SmtUtils]: Spent 10.02s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:46:52,500 WARN L227 SmtUtils]: Spent 10.03s on a formula simplification that was a NOOP. DAG size: 30 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:47:02,546 WARN L227 SmtUtils]: Spent 10.03s on a formula simplification that was a NOOP. DAG size: 30 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:47:14,676 WARN L227 SmtUtils]: Spent 12.11s on a formula simplification. DAG size of input: 29 DAG size of output: 28 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:47:35,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:47:35,434 INFO L93 Difference]: Finished difference Result 723 states and 886 transitions. [2021-11-20 06:47:35,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-20 06:47:35,434 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 4.2368421052631575) internal successors, (161), 36 states have internal predecessors, (161), 15 states have call successors, (23), 4 states have call predecessors, (23), 8 states have return successors, (22), 13 states have call predecessors, (22), 14 states have call successors, (22) Word has length 100 [2021-11-20 06:47:35,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:47:35,439 INFO L225 Difference]: With dead ends: 723 [2021-11-20 06:47:35,439 INFO L226 Difference]: Without dead ends: 648 [2021-11-20 06:47:35,441 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 196 SyntacticMatches, 7 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 766 ImplicationChecksByTransitivity, 191.8s TimeCoverageRelationStatistics Valid=306, Invalid=2633, Unknown=31, NotChecked=0, Total=2970 [2021-11-20 06:47:35,442 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 139 mSDsluCounter, 1400 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 1488 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 206 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:47:35,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 1488 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 245 Invalid, 0 Unknown, 206 Unchecked, 0.3s Time] [2021-11-20 06:47:35,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2021-11-20 06:47:35,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 556. [2021-11-20 06:47:35,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 453 states have (on average 1.2075055187637969) internal successors, (547), 460 states have internal predecessors, (547), 51 states have call successors, (51), 44 states have call predecessors, (51), 51 states have return successors, (79), 51 states have call predecessors, (79), 50 states have call successors, (79) [2021-11-20 06:47:35,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 677 transitions. [2021-11-20 06:47:35,539 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 677 transitions. Word has length 100 [2021-11-20 06:47:35,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:47:35,540 INFO L470 AbstractCegarLoop]: Abstraction has 556 states and 677 transitions. [2021-11-20 06:47:35,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 4.2368421052631575) internal successors, (161), 36 states have internal predecessors, (161), 15 states have call successors, (23), 4 states have call predecessors, (23), 8 states have return successors, (22), 13 states have call predecessors, (22), 14 states have call successors, (22) [2021-11-20 06:47:35,540 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 677 transitions. [2021-11-20 06:47:35,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-20 06:47:35,542 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:47:35,543 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-20 06:47:35,584 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-20 06:47:35,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:47:35,762 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:47:35,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:47:35,762 INFO L85 PathProgramCache]: Analyzing trace with hash 901447866, now seen corresponding path program 1 times [2021-11-20 06:47:35,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:47:35,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453987884] [2021-11-20 06:47:35,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:47:35,763 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:47:35,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:47:35,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:47:35,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:47:35,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 06:47:35,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:47:35,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 06:47:35,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:47:35,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:47:35,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:47:35,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-20 06:47:35,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:47:35,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-20 06:47:35,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:47:35,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:47:35,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:47:35,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-20 06:47:35,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:47:35,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-20 06:47:35,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:47:35,998 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 10 proven. 33 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-20 06:47:35,998 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:47:35,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453987884] [2021-11-20 06:47:35,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453987884] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:47:35,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218926287] [2021-11-20 06:47:35,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:47:35,999 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:47:35,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:47:36,002 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:47:36,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-20 06:47:36,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:47:36,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 06:47:36,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:47:36,413 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-20 06:47:36,413 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:47:36,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218926287] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:47:36,413 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:47:36,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2021-11-20 06:47:36,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448658532] [2021-11-20 06:47:36,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:47:36,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:47:36,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:47:36,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:47:36,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-11-20 06:47:36,415 INFO L87 Difference]: Start difference. First operand 556 states and 677 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-20 06:47:36,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:47:36,585 INFO L93 Difference]: Finished difference Result 631 states and 774 transitions. [2021-11-20 06:47:36,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 06:47:36,586 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 100 [2021-11-20 06:47:36,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:47:36,589 INFO L225 Difference]: With dead ends: 631 [2021-11-20 06:47:36,590 INFO L226 Difference]: Without dead ends: 545 [2021-11-20 06:47:36,591 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-11-20 06:47:36,592 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 90 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:47:36,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 248 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:47:36,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2021-11-20 06:47:36,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 545. [2021-11-20 06:47:36,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 545 states, 443 states have (on average 1.200902934537246) internal successors, (532), 449 states have internal predecessors, (532), 51 states have call successors, (51), 44 states have call predecessors, (51), 50 states have return successors, (75), 51 states have call predecessors, (75), 50 states have call successors, (75) [2021-11-20 06:47:36,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 658 transitions. [2021-11-20 06:47:36,658 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 658 transitions. Word has length 100 [2021-11-20 06:47:36,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:47:36,658 INFO L470 AbstractCegarLoop]: Abstraction has 545 states and 658 transitions. [2021-11-20 06:47:36,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-20 06:47:36,659 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 658 transitions. [2021-11-20 06:47:36,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-20 06:47:36,661 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:47:36,661 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:47:36,700 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-20 06:47:36,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:47:36,876 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:47:36,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:47:36,877 INFO L85 PathProgramCache]: Analyzing trace with hash 855153545, now seen corresponding path program 1 times [2021-11-20 06:47:36,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:47:36,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659840090] [2021-11-20 06:47:36,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:47:36,877 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:47:36,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:47:36,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:47:36,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:47:36,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 06:47:36,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:47:36,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 06:47:37,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:47:37,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:47:37,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:47:37,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-20 06:47:37,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:47:37,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-20 06:47:37,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:47:37,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-20 06:47:37,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:47:37,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:47:37,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:47:37,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-11-20 06:47:37,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:47:37,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-11-20 06:47:37,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:47:37,292 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 37 proven. 11 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-20 06:47:37,292 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:47:37,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659840090] [2021-11-20 06:47:37,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659840090] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:47:37,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470661778] [2021-11-20 06:47:37,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:47:37,293 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:47:37,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:47:37,294 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:47:37,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-20 06:47:37,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:47:37,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 87 conjunts are in the unsatisfiable core [2021-11-20 06:47:37,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:47:37,526 INFO L354 Elim1Store]: treesize reduction 19, result has 50.0 percent of original size [2021-11-20 06:47:37,527 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 1 case distinctions, treesize of input 63 treesize of output 58 [2021-11-20 06:47:37,541 INFO L354 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2021-11-20 06:47:37,541 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 1 case distinctions, treesize of input 73 treesize of output 54 [2021-11-20 06:47:56,776 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 64 proven. 20 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 06:47:56,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:48:00,112 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 4 proven. 51 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-20 06:48:00,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470661778] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:48:00,112 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:48:00,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 19, 14] total 43 [2021-11-20 06:48:00,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641875978] [2021-11-20 06:48:00,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:48:00,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-20 06:48:00,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:48:00,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-20 06:48:00,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1615, Unknown=1, NotChecked=0, Total=1806 [2021-11-20 06:48:00,115 INFO L87 Difference]: Start difference. First operand 545 states and 658 transitions. Second operand has 43 states, 40 states have (on average 4.8) internal successors, (192), 41 states have internal predecessors, (192), 18 states have call successors, (30), 4 states have call predecessors, (30), 10 states have return successors, (29), 14 states have call predecessors, (29), 18 states have call successors, (29) [2021-11-20 06:48:04,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:48:04,572 INFO L93 Difference]: Finished difference Result 882 states and 1130 transitions. [2021-11-20 06:48:04,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-20 06:48:04,573 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 40 states have (on average 4.8) internal successors, (192), 41 states have internal predecessors, (192), 18 states have call successors, (30), 4 states have call predecessors, (30), 10 states have return successors, (29), 14 states have call predecessors, (29), 18 states have call successors, (29) Word has length 110 [2021-11-20 06:48:04,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:48:04,579 INFO L225 Difference]: With dead ends: 882 [2021-11-20 06:48:04,579 INFO L226 Difference]: Without dead ends: 713 [2021-11-20 06:48:04,583 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 209 SyntacticMatches, 5 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1106 ImplicationChecksByTransitivity, 19.0s TimeCoverageRelationStatistics Valid=369, Invalid=3790, Unknown=1, NotChecked=0, Total=4160 [2021-11-20 06:48:04,583 INFO L933 BasicCegarLoop]: 121 mSDtfsCounter, 167 mSDsluCounter, 1885 mSDsCounter, 0 mSdLazyCounter, 1388 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 2006 SdHoareTripleChecker+Invalid, 1873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 1388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 369 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:48:04,584 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 2006 Invalid, 1873 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 1388 Invalid, 0 Unknown, 369 Unchecked, 1.3s Time] [2021-11-20 06:48:04,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2021-11-20 06:48:04,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 595. [2021-11-20 06:48:04,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 483 states have (on average 1.2008281573498965) internal successors, (580), 489 states have internal predecessors, (580), 55 states have call successors, (55), 44 states have call predecessors, (55), 56 states have return successors, (81), 61 states have call predecessors, (81), 54 states have call successors, (81) [2021-11-20 06:48:04,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 716 transitions. [2021-11-20 06:48:04,686 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 716 transitions. Word has length 110 [2021-11-20 06:48:04,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:48:04,687 INFO L470 AbstractCegarLoop]: Abstraction has 595 states and 716 transitions. [2021-11-20 06:48:04,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 40 states have (on average 4.8) internal successors, (192), 41 states have internal predecessors, (192), 18 states have call successors, (30), 4 states have call predecessors, (30), 10 states have return successors, (29), 14 states have call predecessors, (29), 18 states have call successors, (29) [2021-11-20 06:48:04,688 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 716 transitions. [2021-11-20 06:48:04,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-20 06:48:04,690 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:48:04,691 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:48:04,730 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-20 06:48:04,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:48:04,917 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:48:04,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:48:04,918 INFO L85 PathProgramCache]: Analyzing trace with hash -2065682137, now seen corresponding path program 1 times [2021-11-20 06:48:04,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:48:04,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932681074] [2021-11-20 06:48:04,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:48:04,918 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:48:04,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:48:05,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:48:05,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:48:05,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 06:48:05,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:48:05,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 06:48:05,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:48:05,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:48:05,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:48:05,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-20 06:48:05,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:48:05,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-20 06:48:05,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:48:05,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:48:05,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:48:05,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-20 06:48:05,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:48:05,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-20 06:48:05,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:48:05,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:48:05,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:48:05,986 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 12 proven. 36 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-20 06:48:05,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:48:05,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932681074] [2021-11-20 06:48:05,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932681074] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:48:05,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315210764] [2021-11-20 06:48:05,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:48:05,987 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:48:05,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:48:05,993 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:48:06,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-20 06:48:06,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:48:06,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 119 conjunts are in the unsatisfiable core [2021-11-20 06:48:06,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:48:06,292 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 14 treesize of output 15 [2021-11-20 06:48:06,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2021-11-20 06:48:09,791 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 35 proven. 40 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-20 06:48:09,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:48:21,387 WARN L227 SmtUtils]: Spent 10.25s on a formula simplification that was a NOOP. DAG size: 26 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:48:40,496 WARN L227 SmtUtils]: Spent 10.21s on a formula simplification that was a NOOP. DAG size: 29 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:48:42,139 INFO L354 Elim1Store]: treesize reduction 331, result has 32.4 percent of original size [2021-11-20 06:48:42,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 1587 treesize of output 1585 [2021-11-20 06:48:42,526 INFO L354 Elim1Store]: treesize reduction 453, result has 25.0 percent of original size [2021-11-20 06:48:42,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 29 case distinctions, treesize of input 4774 treesize of output 4504 [2021-11-20 06:48:42,818 INFO L354 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2021-11-20 06:48:42,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 3764 treesize of output 3676 [2021-11-20 06:48:42,962 INFO L354 Elim1Store]: treesize reduction 18, result has 67.3 percent of original size [2021-11-20 06:48:42,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 3674 treesize of output 3534 [2021-11-20 06:48:44,821 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:48:45,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-11-20 06:49:09,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-11-20 06:49:09,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:49:09,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 19 treesize of output 11 [2021-11-20 06:49:10,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:49:10,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 19 treesize of output 11 [2021-11-20 06:49:10,347 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:49:10,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:49:10,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-11-20 06:49:10,908 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:49:10,946 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:49:11,039 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:49:11,072 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:49:11,182 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:49:11,228 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:49:11,264 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:49:11,430 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:49:11,478 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:49:11,515 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:49:12,395 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:49:12,460 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:49:12,506 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:49:12,718 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:49:12,761 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:49:12,792 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:49:16,987 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:49:17,044 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:49:17,174 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:49:17,224 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:49:17,375 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:49:17,436 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:49:17,486 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:49:17,693 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:49:17,737 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:49:17,772 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:49:18,506 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:49:18,560 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:49:18,603 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:49:18,814 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:49:18,872 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:49:18,918 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:49:19,276 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:49:19,317 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:49:19,406 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:49:19,438 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:49:19,551 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:49:19,596 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:49:19,631 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:49:19,803 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:49:19,850 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:49:19,888 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:49:20,629 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:49:20,687 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:49:20,734 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:49:20,955 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:49:20,996 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:49:21,027 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:49:25,350 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:49:25,399 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:49:25,513 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:49:25,556 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:49:25,705 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:49:25,760 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:49:25,805 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:49:26,012 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:49:26,071 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:49:26,120 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:49:26,965 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:49:27,007 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:49:27,040 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:49:27,218 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:49:27,272 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:49:27,308 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:49:41,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:49:41,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 19 treesize of output 11 [2021-11-20 06:49:41,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:49:41,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-11-20 06:49:43,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:49:43,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 19 treesize of output 11 [2021-11-20 06:49:44,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:49:44,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-11-20 06:49:45,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:49:45,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-11-20 06:49:45,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:49:45,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-11-20 06:49:47,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:49:47,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-11-20 06:49:50,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:49:50,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:49:50,700 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 06:49:50,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 628 treesize of output 614 [2021-11-20 06:50:17,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:50:17,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-11-20 06:50:18,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:50:18,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-11-20 06:50:21,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:50:21,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-11-20 06:50:21,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:50:21,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:50:21,890 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-20 06:50:21,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 27 treesize of output 15 [2021-11-20 06:50:22,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:50:22,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:50:22,356 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-20 06:50:22,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 27 treesize of output 15 [2021-11-20 06:50:22,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:50:22,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:50:22,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:50:22,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:50:22,546 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 06:50:22,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 44 [2021-11-20 06:50:22,680 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:22,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:50:22,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:50:22,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:50:22,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:50:22,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 30 [2021-11-20 06:50:22,813 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:22,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:50:22,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:50:22,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:50:22,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-11-20 06:50:23,297 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:23,367 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:23,410 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:23,488 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:23,595 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:23,630 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:23,691 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:23,748 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:23,784 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:23,844 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:23,881 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:23,984 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:24,048 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:24,089 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:24,136 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:24,179 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:24,304 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:24,370 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:24,411 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:24,449 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:24,492 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:24,629 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:24,705 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:24,753 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:24,808 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:24,863 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:24,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:50:24,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:50:24,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:50:24,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-11-20 06:50:25,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:50:25,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:50:25,123 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-20 06:50:25,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 27 treesize of output 15 [2021-11-20 06:50:25,729 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:25,853 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:25,910 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:25,946 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:25,986 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:26,024 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:26,306 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:26,371 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:26,410 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:26,481 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:26,555 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:26,606 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:26,695 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:26,780 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:26,836 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:26,996 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:27,096 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:27,156 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:27,253 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:27,326 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:27,525 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:27,603 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:27,643 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:27,690 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:27,733 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:27,864 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:27,937 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:27,983 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:28,037 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:28,086 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:28,153 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:28,212 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:28,254 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:28,517 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:28,579 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:28,804 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:28,905 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:28,958 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:29,172 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:29,281 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:29,338 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:29,617 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:29,691 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:29,731 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:29,893 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:29,975 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:30,020 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:30,230 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:30,344 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:30,423 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:30,508 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:30,559 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:30,622 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:30,790 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:30,855 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:31,119 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:31,217 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:31,287 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:31,583 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:31,643 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:31,690 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:31,957 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:32,013 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:32,056 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:32,235 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:32,308 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:32,366 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:32,629 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:32,719 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:32,802 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:32,906 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:32,973 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:33,110 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:33,289 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:33,383 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:33,442 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:33,496 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:33,554 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:33,990 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:34,047 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:34,085 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:34,151 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:34,219 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:34,257 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:34,322 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:34,386 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:34,426 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:34,557 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:34,635 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:34,685 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:34,731 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:34,782 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:34,929 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:35,015 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:35,069 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:35,120 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:35,176 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:35,338 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:35,429 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:35,486 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:35,541 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:35,597 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:35,675 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:35,744 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:35,793 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:36,186 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:36,300 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:36,355 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:36,393 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:36,424 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:36,463 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:36,732 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:36,793 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:36,831 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:36,896 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:36,958 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:36,998 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:37,065 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:37,129 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:37,171 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:37,292 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:37,363 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:37,409 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:37,451 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:37,497 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:37,625 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:37,705 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:37,763 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:37,819 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:37,878 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:38,053 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:38,169 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:38,201 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:38,230 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:38,266 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:38,313 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:38,357 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:38,389 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:38,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:50:38,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:50:38,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:50:38,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:50:38,674 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 06:50:38,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 44 [2021-11-20 06:50:40,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:50:40,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:50:40,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:50:40,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:50:40,526 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 06:50:40,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 44 [2021-11-20 06:50:45,954 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:46,010 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:46,232 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:46,346 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:46,412 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:46,628 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:46,719 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:46,777 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:47,042 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:47,147 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:47,213 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:47,422 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:47,531 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:47,591 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:47,845 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:47,944 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:48,022 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:48,110 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:48,167 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:48,221 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:48,398 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:48,459 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:48,671 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:48,725 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:48,774 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:48,935 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:48,995 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:49,047 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:49,292 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:49,361 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:49,422 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:49,627 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:49,697 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:49,750 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:50,015 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:50,110 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:50,200 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:50,313 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:50,389 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:50,786 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:50,839 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:51,042 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:51,137 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:51,190 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:51,286 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:51,374 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:51,504 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:51,862 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:51,957 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:52,018 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:52,244 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:52,350 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:52,406 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:52,573 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:52,692 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:52,779 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:52,976 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:53,019 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:53,092 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:53,243 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:53,288 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:53,468 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:53,530 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:53,584 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:53,684 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:53,752 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:53,811 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:54,088 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:54,167 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:54,232 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:54,437 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:54,516 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:54,586 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:54,780 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:54,916 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:54,981 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:55,060 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:55,114 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:55,457 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:55,506 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:55,712 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:55,801 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:55,853 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:56,039 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:56,142 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:56,208 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:56,541 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:56,642 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:56,698 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:56,922 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:57,002 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:57,044 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:57,238 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:57,326 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:57,394 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:57,469 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:57,517 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:57,563 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:57,724 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:57,769 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:57,968 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:58,040 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:58,102 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:58,327 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:58,405 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:58,463 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:58,752 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:58,807 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:58,848 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:59,014 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:59,073 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:59,116 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:59,341 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:59,433 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:59,517 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:59,621 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:50:59,688 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:51:00,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:51:00,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:51:00,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:51:00,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:51:00,154 INFO L354 Elim1Store]: treesize reduction 11, result has 59.3 percent of original size [2021-11-20 06:51:00,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 33 [2021-11-20 06:51:00,293 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:51:00,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:51:00,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:51:00,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:51:00,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:51:00,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 30 [2021-11-20 06:51:00,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:51:00,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:51:00,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:51:00,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-11-20 06:51:00,812 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:51:00,905 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:51:00,959 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:51:01,017 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:51:01,085 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:51:01,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:51:01,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:51:01,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:51:01,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-11-20 06:51:03,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:51:03,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:51:03,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:51:03,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-11-20 06:51:09,812 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:51:09,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2021-11-20 06:51:11,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:51:11,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:51:11,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:51:11,994 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 06:51:11,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 655 treesize of output 651 [2021-11-20 06:51:17,997 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 06:51:17,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 508 treesize of output 476 [2021-11-20 06:51:18,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 89 treesize of output 83 [2021-11-20 06:51:18,474 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 06:51:18,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 508 treesize of output 476 [2021-11-20 06:51:18,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 83 [2021-11-20 06:51:19,815 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:51:19,823 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:51:19,831 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 06:51:20,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-11-20 06:51:20,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:51:20,488 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 06:51:20,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 5 case distinctions, treesize of input 230 treesize of output 256 [2021-11-20 06:51:22,748 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 06:51:22,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 177 treesize of output 189 [2021-11-20 06:51:23,521 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 33 proven. 46 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-20 06:51:23,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315210764] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:51:23,521 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:51:23,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 25] total 62 [2021-11-20 06:51:23,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311423556] [2021-11-20 06:51:23,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:51:23,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-11-20 06:51:23,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:51:23,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-11-20 06:51:23,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=3532, Unknown=2, NotChecked=0, Total=3782 [2021-11-20 06:51:23,524 INFO L87 Difference]: Start difference. First operand 595 states and 716 transitions. Second operand has 62 states, 59 states have (on average 3.2203389830508473) internal successors, (190), 54 states have internal predecessors, (190), 20 states have call successors, (26), 3 states have call predecessors, (26), 14 states have return successors, (26), 19 states have call predecessors, (26), 19 states have call successors, (26) [2021-11-20 06:51:29,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:51:29,026 INFO L93 Difference]: Finished difference Result 1055 states and 1368 transitions. [2021-11-20 06:51:29,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-11-20 06:51:29,027 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 59 states have (on average 3.2203389830508473) internal successors, (190), 54 states have internal predecessors, (190), 20 states have call successors, (26), 3 states have call predecessors, (26), 14 states have return successors, (26), 19 states have call predecessors, (26), 19 states have call successors, (26) Word has length 113 [2021-11-20 06:51:29,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:51:29,034 INFO L225 Difference]: With dead ends: 1055 [2021-11-20 06:51:29,034 INFO L226 Difference]: Without dead ends: 975 [2021-11-20 06:51:29,038 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 207 SyntacticMatches, 9 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1961 ImplicationChecksByTransitivity, 36.1s TimeCoverageRelationStatistics Valid=588, Invalid=7782, Unknown=2, NotChecked=0, Total=8372 [2021-11-20 06:51:29,039 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 91 mSDsluCounter, 1559 mSDsCounter, 0 mSdLazyCounter, 1602 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 1627 SdHoareTripleChecker+Invalid, 1979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 319 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:51:29,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 1627 Invalid, 1979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1602 Invalid, 0 Unknown, 319 Unchecked, 2.4s Time] [2021-11-20 06:51:29,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2021-11-20 06:51:29,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 740. [2021-11-20 06:51:29,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 591 states have (on average 1.1979695431472082) internal successors, (708), 604 states have internal predecessors, (708), 71 states have call successors, (71), 48 states have call predecessors, (71), 77 states have return successors, (126), 87 states have call predecessors, (126), 70 states have call successors, (126) [2021-11-20 06:51:29,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 905 transitions. [2021-11-20 06:51:29,156 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 905 transitions. Word has length 113 [2021-11-20 06:51:29,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:51:29,157 INFO L470 AbstractCegarLoop]: Abstraction has 740 states and 905 transitions. [2021-11-20 06:51:29,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 59 states have (on average 3.2203389830508473) internal successors, (190), 54 states have internal predecessors, (190), 20 states have call successors, (26), 3 states have call predecessors, (26), 14 states have return successors, (26), 19 states have call predecessors, (26), 19 states have call successors, (26) [2021-11-20 06:51:29,158 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 905 transitions. [2021-11-20 06:51:29,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-20 06:51:29,160 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:51:29,160 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:51:29,198 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-20 06:51:29,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:51:29,373 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:51:29,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:51:29,374 INFO L85 PathProgramCache]: Analyzing trace with hash -1807516699, now seen corresponding path program 1 times [2021-11-20 06:51:29,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:51:29,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368599228] [2021-11-20 06:51:29,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:51:29,374 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:51:29,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:29,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:51:29,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:29,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 06:51:29,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:29,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 06:51:29,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:29,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:51:29,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:29,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-20 06:51:29,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:29,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-20 06:51:29,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:29,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:51:29,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:29,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-20 06:51:29,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:29,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-20 06:51:29,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:29,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:51:29,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:29,873 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 30 proven. 34 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-20 06:51:29,873 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:51:29,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368599228] [2021-11-20 06:51:29,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368599228] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:51:29,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809821420] [2021-11-20 06:51:29,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:51:29,874 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:51:29,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:51:29,875 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:51:29,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-20 06:51:30,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:30,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 86 conjunts are in the unsatisfiable core [2021-11-20 06:51:30,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:51:30,112 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-20 06:51:30,113 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 1 case distinctions, treesize of input 29 treesize of output 17 [2021-11-20 06:51:37,107 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 43 proven. 48 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 06:51:37,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:51:38,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 165 treesize of output 157 [2021-11-20 06:51:38,848 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 30 proven. 43 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-20 06:51:38,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809821420] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:51:38,848 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:51:38,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 23, 20] total 49 [2021-11-20 06:51:38,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513715138] [2021-11-20 06:51:38,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:51:38,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-20 06:51:38,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:51:38,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-20 06:51:38,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=2149, Unknown=0, NotChecked=0, Total=2352 [2021-11-20 06:51:38,851 INFO L87 Difference]: Start difference. First operand 740 states and 905 transitions. Second operand has 49 states, 49 states have (on average 3.816326530612245) internal successors, (187), 47 states have internal predecessors, (187), 18 states have call successors, (26), 4 states have call predecessors, (26), 10 states have return successors, (25), 15 states have call predecessors, (25), 17 states have call successors, (25) [2021-11-20 06:51:43,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:51:43,459 INFO L93 Difference]: Finished difference Result 2194 states and 3246 transitions. [2021-11-20 06:51:43,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-11-20 06:51:43,460 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.816326530612245) internal successors, (187), 47 states have internal predecessors, (187), 18 states have call successors, (26), 4 states have call predecessors, (26), 10 states have return successors, (25), 15 states have call predecessors, (25), 17 states have call successors, (25) Word has length 113 [2021-11-20 06:51:43,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:51:43,475 INFO L225 Difference]: With dead ends: 2194 [2021-11-20 06:51:43,475 INFO L226 Difference]: Without dead ends: 1898 [2021-11-20 06:51:43,480 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 228 SyntacticMatches, 11 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2182 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=575, Invalid=6397, Unknown=0, NotChecked=0, Total=6972 [2021-11-20 06:51:43,481 INFO L933 BasicCegarLoop]: 136 mSDtfsCounter, 281 mSDsluCounter, 2003 mSDsCounter, 0 mSdLazyCounter, 1917 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 2139 SdHoareTripleChecker+Invalid, 2724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 1917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 688 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-20 06:51:43,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [304 Valid, 2139 Invalid, 2724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 1917 Invalid, 0 Unknown, 688 Unchecked, 1.9s Time] [2021-11-20 06:51:43,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1898 states. [2021-11-20 06:51:43,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1898 to 1250. [2021-11-20 06:51:43,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1250 states, 994 states have (on average 1.215291750503018) internal successors, (1208), 1017 states have internal predecessors, (1208), 128 states have call successors, (128), 68 states have call predecessors, (128), 127 states have return successors, (335), 164 states have call predecessors, (335), 127 states have call successors, (335) [2021-11-20 06:51:43,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1250 states to 1250 states and 1671 transitions. [2021-11-20 06:51:43,740 INFO L78 Accepts]: Start accepts. Automaton has 1250 states and 1671 transitions. Word has length 113 [2021-11-20 06:51:43,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:51:43,741 INFO L470 AbstractCegarLoop]: Abstraction has 1250 states and 1671 transitions. [2021-11-20 06:51:43,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.816326530612245) internal successors, (187), 47 states have internal predecessors, (187), 18 states have call successors, (26), 4 states have call predecessors, (26), 10 states have return successors, (25), 15 states have call predecessors, (25), 17 states have call successors, (25) [2021-11-20 06:51:43,741 INFO L276 IsEmpty]: Start isEmpty. Operand 1250 states and 1671 transitions. [2021-11-20 06:51:43,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-20 06:51:43,746 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:51:43,746 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 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] [2021-11-20 06:51:43,781 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-20 06:51:43,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-20 06:51:43,961 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:51:43,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:51:43,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1476333347, now seen corresponding path program 1 times [2021-11-20 06:51:43,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:51:43,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578070316] [2021-11-20 06:51:43,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:51:43,962 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:51:43,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:44,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:51:44,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:44,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 06:51:44,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:44,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 06:51:44,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:44,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:51:44,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:44,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-20 06:51:44,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:44,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-20 06:51:44,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:44,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:51:44,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:44,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-20 06:51:44,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:44,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-20 06:51:44,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:44,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:51:44,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:44,336 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 30 proven. 41 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-20 06:51:44,336 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:51:44,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578070316] [2021-11-20 06:51:44,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578070316] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:51:44,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161231639] [2021-11-20 06:51:44,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:51:44,337 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:51:44,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:51:44,338 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:51:44,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-20 06:51:44,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:44,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-20 06:51:44,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:51:44,908 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-20 06:51:44,908 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:51:44,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161231639] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:51:44,909 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:51:44,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [14] total 23 [2021-11-20 06:51:44,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368138101] [2021-11-20 06:51:44,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:51:44,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 06:51:44,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:51:44,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 06:51:44,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2021-11-20 06:51:44,910 INFO L87 Difference]: Start difference. First operand 1250 states and 1671 transitions. Second operand has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 11 states have internal predecessors, (61), 5 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2021-11-20 06:51:45,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:51:45,543 INFO L93 Difference]: Finished difference Result 2835 states and 3879 transitions. [2021-11-20 06:51:45,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 06:51:45,544 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 11 states have internal predecessors, (61), 5 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 113 [2021-11-20 06:51:45,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:51:45,552 INFO L225 Difference]: With dead ends: 2835 [2021-11-20 06:51:45,552 INFO L226 Difference]: Without dead ends: 1297 [2021-11-20 06:51:45,560 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=118, Invalid=874, Unknown=0, NotChecked=0, Total=992 [2021-11-20 06:51:45,561 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 139 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:51:45,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 428 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 06:51:45,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1297 states. [2021-11-20 06:51:45,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1297 to 1183. [2021-11-20 06:51:45,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1183 states, 938 states have (on average 1.185501066098081) internal successors, (1112), 962 states have internal predecessors, (1112), 122 states have call successors, (122), 68 states have call predecessors, (122), 122 states have return successors, (292), 152 states have call predecessors, (292), 121 states have call successors, (292) [2021-11-20 06:51:45,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1183 states to 1183 states and 1526 transitions. [2021-11-20 06:51:45,756 INFO L78 Accepts]: Start accepts. Automaton has 1183 states and 1526 transitions. Word has length 113 [2021-11-20 06:51:45,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:51:45,757 INFO L470 AbstractCegarLoop]: Abstraction has 1183 states and 1526 transitions. [2021-11-20 06:51:45,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 11 states have internal predecessors, (61), 5 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2021-11-20 06:51:45,757 INFO L276 IsEmpty]: Start isEmpty. Operand 1183 states and 1526 transitions. [2021-11-20 06:51:45,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-20 06:51:45,762 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:51:45,762 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:51:45,797 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-20 06:51:45,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-20 06:51:45,977 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:51:45,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:51:45,977 INFO L85 PathProgramCache]: Analyzing trace with hash 2137479845, now seen corresponding path program 1 times [2021-11-20 06:51:45,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:51:45,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273370423] [2021-11-20 06:51:45,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:51:45,978 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:51:45,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:46,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:51:46,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:46,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 06:51:46,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:46,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-20 06:51:46,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:46,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:51:46,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:46,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-20 06:51:46,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:46,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-20 06:51:46,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:46,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:51:46,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:46,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-11-20 06:51:46,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:46,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-11-20 06:51:46,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:46,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:51:46,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:46,292 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-20 06:51:46,293 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:51:46,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273370423] [2021-11-20 06:51:46,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273370423] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:51:46,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805330698] [2021-11-20 06:51:46,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:51:46,293 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:51:46,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:51:46,301 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:51:46,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-20 06:51:46,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:46,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-20 06:51:46,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:51:46,592 INFO L354 Elim1Store]: treesize reduction 19, result has 50.0 percent of original size [2021-11-20 06:51:46,593 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 1 case distinctions, treesize of input 33 treesize of output 29 [2021-11-20 06:52:00,680 WARN L227 SmtUtils]: Spent 10.03s on a formula simplification that was a NOOP. DAG size: 21 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:52:18,382 WARN L227 SmtUtils]: Spent 8.05s on a formula simplification that was a NOOP. DAG size: 17 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:52:28,488 WARN L227 SmtUtils]: Spent 10.03s on a formula simplification that was a NOOP. DAG size: 24 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:52:37,872 WARN L227 SmtUtils]: Spent 9.22s on a formula simplification that was a NOOP. DAG size: 24 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:52:43,998 WARN L227 SmtUtils]: Spent 6.07s on a formula simplification that was a NOOP. DAG size: 26 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:52:54,158 WARN L227 SmtUtils]: Spent 10.04s on a formula simplification that was a NOOP. DAG size: 24 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:53:04,288 WARN L227 SmtUtils]: Spent 10.03s on a formula simplification that was a NOOP. DAG size: 26 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:53:14,395 WARN L227 SmtUtils]: Spent 10.03s on a formula simplification that was a NOOP. DAG size: 26 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:53:24,475 WARN L227 SmtUtils]: Spent 10.03s on a formula simplification that was a NOOP. DAG size: 24 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:53:34,609 WARN L227 SmtUtils]: Spent 10.04s on a formula simplification that was a NOOP. DAG size: 30 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:53:44,716 WARN L227 SmtUtils]: Spent 10.03s on a formula simplification that was a NOOP. DAG size: 28 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:53:54,830 WARN L227 SmtUtils]: Spent 10.03s on a formula simplification that was a NOOP. DAG size: 26 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:53:54,998 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 65 proven. 2 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-20 06:53:54,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:54:22,507 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 177 treesize of output 169 [2021-11-20 06:54:24,641 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-20 06:54:24,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805330698] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:54:24,641 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:54:24,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 14] total 38 [2021-11-20 06:54:24,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251044272] [2021-11-20 06:54:24,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:54:24,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-20 06:54:24,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:54:24,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-20 06:54:24,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1239, Unknown=18, NotChecked=0, Total=1406 [2021-11-20 06:54:24,644 INFO L87 Difference]: Start difference. First operand 1183 states and 1526 transitions. Second operand has 38 states, 38 states have (on average 4.2105263157894735) internal successors, (160), 34 states have internal predecessors, (160), 10 states have call successors, (23), 3 states have call predecessors, (23), 8 states have return successors, (22), 8 states have call predecessors, (22), 10 states have call successors, (22) [2021-11-20 06:54:34,820 WARN L227 SmtUtils]: Spent 10.04s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:54:45,073 WARN L227 SmtUtils]: Spent 6.10s on a formula simplification that was a NOOP. DAG size: 31 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:54:52,331 WARN L227 SmtUtils]: Spent 7.23s on a formula simplification that was a NOOP. DAG size: 31 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:55:02,378 WARN L227 SmtUtils]: Spent 10.03s on a formula simplification that was a NOOP. DAG size: 28 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:55:12,445 WARN L227 SmtUtils]: Spent 10.04s on a formula simplification that was a NOOP. DAG size: 39 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:55:22,518 WARN L227 SmtUtils]: Spent 10.04s on a formula simplification that was a NOOP. DAG size: 35 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:55:55,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:55:55,864 INFO L93 Difference]: Finished difference Result 2096 states and 2694 transitions. [2021-11-20 06:55:55,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-20 06:55:55,874 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 4.2105263157894735) internal successors, (160), 34 states have internal predecessors, (160), 10 states have call successors, (23), 3 states have call predecessors, (23), 8 states have return successors, (22), 8 states have call predecessors, (22), 10 states have call successors, (22) Word has length 115 [2021-11-20 06:55:55,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:55:55,881 INFO L225 Difference]: With dead ends: 2096 [2021-11-20 06:55:55,882 INFO L226 Difference]: Without dead ends: 1344 [2021-11-20 06:55:55,886 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 247.4s TimeCoverageRelationStatistics Valid=321, Invalid=2951, Unknown=34, NotChecked=0, Total=3306 [2021-11-20 06:55:55,887 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 124 mSDsluCounter, 1292 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 1369 SdHoareTripleChecker+Invalid, 687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 160 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 06:55:55,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 1369 Invalid, 687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 515 Invalid, 0 Unknown, 160 Unchecked, 0.6s Time] [2021-11-20 06:55:55,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1344 states. [2021-11-20 06:55:56,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1344 to 1025. [2021-11-20 06:55:56,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1025 states, 824 states have (on average 1.1856796116504855) internal successors, (977), 845 states have internal predecessors, (977), 92 states have call successors, (92), 62 states have call predecessors, (92), 108 states have return successors, (220), 117 states have call predecessors, (220), 91 states have call successors, (220) [2021-11-20 06:55:56,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1025 states to 1025 states and 1289 transitions. [2021-11-20 06:55:56,109 INFO L78 Accepts]: Start accepts. Automaton has 1025 states and 1289 transitions. Word has length 115 [2021-11-20 06:55:56,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:55:56,110 INFO L470 AbstractCegarLoop]: Abstraction has 1025 states and 1289 transitions. [2021-11-20 06:55:56,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 4.2105263157894735) internal successors, (160), 34 states have internal predecessors, (160), 10 states have call successors, (23), 3 states have call predecessors, (23), 8 states have return successors, (22), 8 states have call predecessors, (22), 10 states have call successors, (22) [2021-11-20 06:55:56,111 INFO L276 IsEmpty]: Start isEmpty. Operand 1025 states and 1289 transitions. [2021-11-20 06:55:56,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-20 06:55:56,113 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:55:56,113 INFO L514 BasicCegarLoop]: trace histogram [6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:55:56,152 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-20 06:55:56,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-20 06:55:56,337 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:55:56,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:55:56,338 INFO L85 PathProgramCache]: Analyzing trace with hash 1112769404, now seen corresponding path program 1 times [2021-11-20 06:55:56,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:55:56,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460678121] [2021-11-20 06:55:56,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:55:56,338 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:55:56,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:55:56,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:55:56,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:55:56,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 06:55:56,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:55:56,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 06:55:56,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:55:56,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:55:56,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:55:56,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-20 06:55:56,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:55:56,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-20 06:55:56,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:55:56,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:55:56,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:55:56,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-20 06:55:56,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:55:56,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-20 06:55:56,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:55:56,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:55:56,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:55:56,574 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-11-20 06:55:56,575 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:55:56,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460678121] [2021-11-20 06:55:56,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460678121] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:55:56,575 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:55:56,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-20 06:55:56,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578783781] [2021-11-20 06:55:56,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:55:56,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 06:55:56,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:55:56,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 06:55:56,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:55:56,577 INFO L87 Difference]: Start difference. First operand 1025 states and 1289 transitions. Second operand has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2021-11-20 06:55:56,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:55:56,818 INFO L93 Difference]: Finished difference Result 1083 states and 1354 transitions. [2021-11-20 06:55:56,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 06:55:56,819 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 116 [2021-11-20 06:55:56,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:55:56,825 INFO L225 Difference]: With dead ends: 1083 [2021-11-20 06:55:56,825 INFO L226 Difference]: Without dead ends: 1081 [2021-11-20 06:55:56,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:55:56,827 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 10 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:55:56,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 528 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:55:56,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1081 states. [2021-11-20 06:55:56,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1081 to 1051. [2021-11-20 06:55:56,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1051 states, 842 states have (on average 1.1817102137767221) internal successors, (995), 868 states have internal predecessors, (995), 94 states have call successors, (94), 63 states have call predecessors, (94), 114 states have return successors, (231), 119 states have call predecessors, (231), 93 states have call successors, (231) [2021-11-20 06:55:56,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1051 states to 1051 states and 1320 transitions. [2021-11-20 06:55:56,984 INFO L78 Accepts]: Start accepts. Automaton has 1051 states and 1320 transitions. Word has length 116 [2021-11-20 06:55:56,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:55:56,985 INFO L470 AbstractCegarLoop]: Abstraction has 1051 states and 1320 transitions. [2021-11-20 06:55:56,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2021-11-20 06:55:56,985 INFO L276 IsEmpty]: Start isEmpty. Operand 1051 states and 1320 transitions. [2021-11-20 06:55:56,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-20 06:55:56,989 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:55:56,989 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:55:56,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-20 06:55:56,989 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:55:56,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:55:56,990 INFO L85 PathProgramCache]: Analyzing trace with hash 509544598, now seen corresponding path program 1 times [2021-11-20 06:55:56,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:55:56,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528374892] [2021-11-20 06:55:56,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:55:56,991 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:55:57,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:55:57,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:55:57,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:55:57,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 06:55:57,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:55:57,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 06:55:57,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:55:57,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:55:57,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:55:57,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-20 06:55:57,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:55:57,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-20 06:55:57,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:55:57,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-20 06:55:57,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:55:57,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:55:57,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:55:57,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-20 06:55:57,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:55:57,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-11-20 06:55:57,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:55:57,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-11-20 06:55:57,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:55:57,193 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 3 proven. 30 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-20 06:55:57,194 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:55:57,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528374892] [2021-11-20 06:55:57,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528374892] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:55:57,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461761188] [2021-11-20 06:55:57,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:55:57,194 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:55:57,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:55:57,195 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:55:57,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e5b556-0241-42ed-88f0-1eb117c1a747/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-20 06:55:57,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:55:57,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 64 conjunts are in the unsatisfiable core [2021-11-20 06:55:57,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:55:57,434 INFO L354 Elim1Store]: treesize reduction 19, result has 50.0 percent of original size [2021-11-20 06:55:57,434 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 1 case distinctions, treesize of input 63 treesize of output 58 [2021-11-20 06:55:57,450 INFO L354 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2021-11-20 06:55:57,450 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 1 case distinctions, treesize of input 73 treesize of output 54 [2021-11-20 06:56:18,951 WARN L227 SmtUtils]: Spent 6.04s on a formula simplification that was a NOOP. DAG size: 39 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:56:25,012 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 80 proven. 15 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-20 06:56:25,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:56:26,604 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 49 proven. 11 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-20 06:56:26,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461761188] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:56:26,604 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:56:26,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 18, 12] total 34 [2021-11-20 06:56:26,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158784641] [2021-11-20 06:56:26,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:56:26,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-20 06:56:26,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:56:26,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-20 06:56:26,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=998, Unknown=5, NotChecked=0, Total=1122 [2021-11-20 06:56:26,606 INFO L87 Difference]: Start difference. First operand 1051 states and 1320 transitions. Second operand has 34 states, 32 states have (on average 5.0625) internal successors, (162), 33 states have internal predecessors, (162), 14 states have call successors, (26), 5 states have call predecessors, (26), 10 states have return successors, (26), 13 states have call predecessors, (26), 14 states have call successors, (26)