./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash a49fa15b0860d2357f9ad3c8c6bab1d80cf83a6734355dc0b05c55121c837273 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 19:40:37,884 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 19:40:37,886 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 19:40:37,910 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 19:40:37,911 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 19:40:37,912 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 19:40:37,913 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 19:40:37,914 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 19:40:37,916 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 19:40:37,917 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 19:40:37,918 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 19:40:37,919 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 19:40:37,919 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 19:40:37,920 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 19:40:37,921 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 19:40:37,922 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 19:40:37,923 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 19:40:37,924 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 19:40:37,925 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 19:40:37,927 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 19:40:37,928 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 19:40:37,930 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 19:40:37,931 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 19:40:37,932 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 19:40:37,936 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 19:40:37,936 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 19:40:37,937 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 19:40:37,938 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 19:40:37,938 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 19:40:37,939 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 19:40:37,940 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 19:40:37,941 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 19:40:37,941 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 19:40:37,942 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 19:40:37,943 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 19:40:37,943 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 19:40:37,944 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 19:40:37,944 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 19:40:37,944 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 19:40:37,945 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 19:40:37,945 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 19:40:37,946 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-06 19:40:37,967 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 19:40:37,968 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 19:40:37,968 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 19:40:37,968 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 19:40:37,969 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 19:40:37,969 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 19:40:37,969 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 19:40:37,970 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 19:40:37,970 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 19:40:37,970 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 19:40:37,970 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 19:40:37,970 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 19:40:37,970 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 19:40:37,970 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 19:40:37,971 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 19:40:37,971 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 19:40:37,971 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 19:40:37,971 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 19:40:37,971 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 19:40:37,971 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 19:40:37,972 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 19:40:37,972 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 19:40:37,972 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 19:40:37,972 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 19:40:37,972 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 19:40:37,972 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 19:40:37,972 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 19:40:37,972 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 19:40:37,972 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 19:40:37,973 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 19:40:37,973 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 19:40:37,973 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_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a49fa15b0860d2357f9ad3c8c6bab1d80cf83a6734355dc0b05c55121c837273 [2021-12-06 19:40:38,170 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 19:40:38,185 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 19:40:38,187 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 19:40:38,188 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 19:40:38,189 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 19:40:38,189 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i [2021-12-06 19:40:38,231 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/data/3dc00aaba/42ce3013b31e42bfbe20a29767f88506/FLAGd4aa098f4 [2021-12-06 19:40:38,819 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 19:40:38,820 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i [2021-12-06 19:40:38,847 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/data/3dc00aaba/42ce3013b31e42bfbe20a29767f88506/FLAGd4aa098f4 [2021-12-06 19:40:39,233 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/data/3dc00aaba/42ce3013b31e42bfbe20a29767f88506 [2021-12-06 19:40:39,238 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 19:40:39,240 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 19:40:39,242 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 19:40:39,242 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 19:40:39,246 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 19:40:39,247 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 07:40:39" (1/1) ... [2021-12-06 19:40:39,248 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a147e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:40:39, skipping insertion in model container [2021-12-06 19:40:39,248 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 07:40:39" (1/1) ... [2021-12-06 19:40:39,254 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 19:40:39,324 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 19:40:39,520 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_25618655-0b71-4f79-9561-b7ed2d40c140/sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i[4493,4506] [2021-12-06 19:40:39,524 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_25618655-0b71-4f79-9561-b7ed2d40c140/sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i[4553,4566] [2021-12-06 19:40:40,036 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:40:40,037 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:40:40,037 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:40:40,038 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:40:40,039 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:40:40,049 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:40:40,049 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:40:40,051 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:40:40,051 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:40:40,053 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:40:40,053 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:40:40,054 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:40:40,054 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:40:40,330 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-06 19:40:40,330 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-06 19:40:40,331 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-06 19:40:40,332 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-06 19:40:40,333 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-06 19:40:40,334 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-06 19:40:40,334 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-06 19:40:40,334 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-06 19:40:40,335 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-06 19:40:40,335 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-06 19:40:40,443 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-06 19:40:40,460 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 19:40:40,471 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 19:40:40,480 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_25618655-0b71-4f79-9561-b7ed2d40c140/sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i[4493,4506] [2021-12-06 19:40:40,481 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_25618655-0b71-4f79-9561-b7ed2d40c140/sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i[4553,4566] [2021-12-06 19:40:40,509 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:40:40,510 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:40:40,510 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:40:40,510 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:40:40,511 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:40:40,516 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:40:40,516 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:40:40,517 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:40:40,518 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:40:40,518 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:40:40,519 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:40:40,519 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:40:40,519 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:40:40,546 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-06 19:40:40,547 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-06 19:40:40,547 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-06 19:40:40,548 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-06 19:40:40,548 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-06 19:40:40,549 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-06 19:40:40,549 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-06 19:40:40,549 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-06 19:40:40,550 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-06 19:40:40,550 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-06 19:40:40,566 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-06 19:40:40,577 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 19:40:40,816 INFO L208 MainTranslator]: Completed translation [2021-12-06 19:40:40,816 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:40:40 WrapperNode [2021-12-06 19:40:40,816 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 19:40:40,817 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 19:40:40,818 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 19:40:40,818 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 19:40:40,825 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:40:40" (1/1) ... [2021-12-06 19:40:40,882 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:40:40" (1/1) ... [2021-12-06 19:40:40,920 INFO L137 Inliner]: procedures = 679, calls = 1040, calls flagged for inlining = 52, calls inlined = 6, statements flattened = 136 [2021-12-06 19:40:40,920 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 19:40:40,921 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 19:40:40,921 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 19:40:40,921 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 19:40:40,930 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:40:40" (1/1) ... [2021-12-06 19:40:40,930 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:40:40" (1/1) ... [2021-12-06 19:40:40,934 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:40:40" (1/1) ... [2021-12-06 19:40:40,935 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:40:40" (1/1) ... [2021-12-06 19:40:40,948 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:40:40" (1/1) ... [2021-12-06 19:40:40,953 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:40:40" (1/1) ... [2021-12-06 19:40:40,957 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:40:40" (1/1) ... [2021-12-06 19:40:40,963 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 19:40:40,964 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 19:40:40,964 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 19:40:40,964 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 19:40:40,965 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:40:40" (1/1) ... [2021-12-06 19:40:40,972 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 19:40:40,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:40:40,994 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 19:40:40,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 19:40:41,025 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-06 19:40:41,025 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-06 19:40:41,025 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-06 19:40:41,026 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2021-12-06 19:40:41,026 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2021-12-06 19:40:41,026 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-06 19:40:41,026 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2021-12-06 19:40:41,026 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2021-12-06 19:40:41,026 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 19:40:41,026 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-06 19:40:41,026 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 19:40:41,026 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 19:40:41,026 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-06 19:40:41,026 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-06 19:40:41,026 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-06 19:40:41,026 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-06 19:40:41,026 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-06 19:40:41,026 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-12-06 19:40:41,027 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-12-06 19:40:41,027 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 19:40:41,188 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 19:40:41,190 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 19:40:41,349 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 19:40:41,355 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 19:40:41,355 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-06 19:40:41,356 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 07:40:41 BoogieIcfgContainer [2021-12-06 19:40:41,356 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 19:40:41,358 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 19:40:41,358 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 19:40:41,360 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 19:40:41,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 07:40:39" (1/3) ... [2021-12-06 19:40:41,361 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a1290ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 07:40:41, skipping insertion in model container [2021-12-06 19:40:41,361 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:40:40" (2/3) ... [2021-12-06 19:40:41,361 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a1290ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 07:40:41, skipping insertion in model container [2021-12-06 19:40:41,361 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 07:40:41" (3/3) ... [2021-12-06 19:40:41,362 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_linked_list_end_harness.i [2021-12-06 19:40:41,367 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 19:40:41,367 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 19:40:41,403 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 19:40:41,409 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-06 19:40:41,409 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 19:40:41,423 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) [2021-12-06 19:40:41,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-06 19:40:41,429 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:40:41,430 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] [2021-12-06 19:40:41,430 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:40:41,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:40:41,435 INFO L85 PathProgramCache]: Analyzing trace with hash -2107862704, now seen corresponding path program 1 times [2021-12-06 19:40:41,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:40:41,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183218375] [2021-12-06 19:40:41,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:40:41,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:40:41,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:40:41,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 19:40:41,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:40:41,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:40:41,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:40:41,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 19:40:41,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:40:41,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-06 19:40:41,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:40:41,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-06 19:40:41,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:40:41,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-06 19:40:41,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:40:41,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-06 19:40:41,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:40:41,824 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-06 19:40:41,824 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:40:41,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183218375] [2021-12-06 19:40:41,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183218375] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:40:41,825 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:40:41,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 19:40:41,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684613550] [2021-12-06 19:40:41,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:40:41,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 19:40:41,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:40:41,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 19:40:41,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 19:40:41,852 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) [2021-12-06 19:40:41,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:40:41,874 INFO L93 Difference]: Finished difference Result 128 states and 184 transitions. [2021-12-06 19:40:41,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 19:40:41,876 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 [2021-12-06 19:40:41,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:40:41,882 INFO L225 Difference]: With dead ends: 128 [2021-12-06 19:40:41,882 INFO L226 Difference]: Without dead ends: 63 [2021-12-06 19:40:41,885 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 [2021-12-06 19:40:41,888 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 [2021-12-06 19:40:41,889 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] [2021-12-06 19:40:41,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-12-06 19:40:41,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-12-06 19:40:41,918 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) [2021-12-06 19:40:41,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 82 transitions. [2021-12-06 19:40:41,921 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 82 transitions. Word has length 68 [2021-12-06 19:40:41,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:40:41,921 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 82 transitions. [2021-12-06 19:40:41,922 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) [2021-12-06 19:40:41,922 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 82 transitions. [2021-12-06 19:40:41,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-06 19:40:41,924 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:40:41,924 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] [2021-12-06 19:40:41,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 19:40:41,925 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:40:41,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:40:41,925 INFO L85 PathProgramCache]: Analyzing trace with hash 900796622, now seen corresponding path program 1 times [2021-12-06 19:40:41,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:40:41,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625122332] [2021-12-06 19:40:41,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:40:41,926 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:40:41,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:40:42,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 19:40:42,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:40:42,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:40:42,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:40:42,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 19:40:42,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:40:42,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-06 19:40:42,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:40:42,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-06 19:40:42,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:40:42,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-06 19:40:42,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:40:42,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-06 19:40:42,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:40:42,154 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-06 19:40:42,154 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:40:42,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625122332] [2021-12-06 19:40:42,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625122332] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:40:42,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198533119] [2021-12-06 19:40:42,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:40:42,155 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:40:42,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:40:42,156 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:40:42,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 19:40:42,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:40:42,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 64 conjunts are in the unsatisfiable core [2021-12-06 19:40:42,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:40:42,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:40:42,413 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 [2021-12-06 19:40:42,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:40:42,426 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 [2021-12-06 19:40:42,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:40:42,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:40:42,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:40:42,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 31 [2021-12-06 19:40:42,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:40:42,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:40:42,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:40:42,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 29 [2021-12-06 19:40:42,871 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 19:40:42,871 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:40:42,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198533119] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:40:42,871 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:40:42,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [6] total 13 [2021-12-06 19:40:42,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875515825] [2021-12-06 19:40:42,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:40:42,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 19:40:42,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:40:42,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 19:40:42,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-12-06 19:40:42,874 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) [2021-12-06 19:40:42,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:40:42,967 INFO L93 Difference]: Finished difference Result 144 states and 195 transitions. [2021-12-06 19:40:42,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 19:40:42,968 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 [2021-12-06 19:40:42,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:40:42,970 INFO L225 Difference]: With dead ends: 144 [2021-12-06 19:40:42,970 INFO L226 Difference]: Without dead ends: 93 [2021-12-06 19:40:42,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-12-06 19:40:42,972 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 32 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:40:42,973 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 282 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 21 Invalid, 0 Unknown, 24 Unchecked, 0.0s Time] [2021-12-06 19:40:42,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-12-06 19:40:42,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 79. [2021-12-06 19:40:42,984 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) [2021-12-06 19:40:42,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 105 transitions. [2021-12-06 19:40:42,985 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 105 transitions. Word has length 68 [2021-12-06 19:40:42,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:40:42,986 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 105 transitions. [2021-12-06 19:40:42,986 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) [2021-12-06 19:40:42,986 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 105 transitions. [2021-12-06 19:40:42,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-06 19:40:42,988 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:40:42,988 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] [2021-12-06 19:40:43,011 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 19:40:43,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-12-06 19:40:43,191 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:40:43,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:40:43,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1148591220, now seen corresponding path program 1 times [2021-12-06 19:40:43,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:40:43,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102713109] [2021-12-06 19:40:43,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:40:43,195 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:40:43,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:40:43,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 19:40:43,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:40:43,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:40:43,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:40:43,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 19:40:43,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:40:43,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-06 19:40:43,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:40:43,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-06 19:40:43,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:40:43,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-06 19:40:43,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:40:43,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-06 19:40:43,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:40:43,482 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-06 19:40:43,482 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:40:43,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102713109] [2021-12-06 19:40:43,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102713109] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:40:43,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135398966] [2021-12-06 19:40:43,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:40:43,483 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:40:43,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:40:43,484 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:40:43,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 19:40:43,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:40:43,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 46 conjunts are in the unsatisfiable core [2021-12-06 19:40:43,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:40:43,635 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 19:40:43,636 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 9 treesize of output 15 [2021-12-06 19:40:43,645 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 19:40:43,645 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 9 treesize of output 15 [2021-12-06 19:40:44,340 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 27 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 19:40:44,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:40:44,749 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 19:40:44,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135398966] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:40:44,750 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:40:44,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 15, 12] total 28 [2021-12-06 19:40:44,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871653375] [2021-12-06 19:40:44,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:40:44,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-06 19:40:44,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:40:44,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-06 19:40:44,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2021-12-06 19:40:44,752 INFO L87 Difference]: Start difference. First operand 79 states and 105 transitions. Second operand has 28 states, 27 states have (on average 3.4814814814814814) internal successors, (94), 25 states have internal predecessors, (94), 9 states have call successors, (19), 3 states have call predecessors, (19), 7 states have return successors, (19), 8 states have call predecessors, (19), 9 states have call successors, (19) [2021-12-06 19:40:45,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:40:45,950 INFO L93 Difference]: Finished difference Result 246 states and 404 transitions. [2021-12-06 19:40:45,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-12-06 19:40:45,950 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 3.4814814814814814) internal successors, (94), 25 states have internal predecessors, (94), 9 states have call successors, (19), 3 states have call predecessors, (19), 7 states have return successors, (19), 8 states have call predecessors, (19), 9 states have call successors, (19) Word has length 68 [2021-12-06 19:40:45,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:40:45,955 INFO L225 Difference]: With dead ends: 246 [2021-12-06 19:40:45,956 INFO L226 Difference]: Without dead ends: 192 [2021-12-06 19:40:45,958 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 127 SyntacticMatches, 6 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 790 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=439, Invalid=3221, Unknown=0, NotChecked=0, Total=3660 [2021-12-06 19:40:45,960 INFO L933 BasicCegarLoop]: 129 mSDtfsCounter, 255 mSDsluCounter, 1511 mSDsCounter, 0 mSdLazyCounter, 1012 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 1640 SdHoareTripleChecker+Invalid, 1542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 1012 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 368 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 19:40:45,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [314 Valid, 1640 Invalid, 1542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 1012 Invalid, 0 Unknown, 368 Unchecked, 0.6s Time] [2021-12-06 19:40:45,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-12-06 19:40:45,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 139. [2021-12-06 19:40:45,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 104 states have (on average 1.375) internal successors, (143), 110 states have internal predecessors, (143), 22 states have call successors, (22), 8 states have call predecessors, (22), 12 states have return successors, (43), 20 states have call predecessors, (43), 21 states have call successors, (43) [2021-12-06 19:40:45,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 208 transitions. [2021-12-06 19:40:45,992 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 208 transitions. Word has length 68 [2021-12-06 19:40:45,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:40:45,993 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 208 transitions. [2021-12-06 19:40:45,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 3.4814814814814814) internal successors, (94), 25 states have internal predecessors, (94), 9 states have call successors, (19), 3 states have call predecessors, (19), 7 states have return successors, (19), 8 states have call predecessors, (19), 9 states have call successors, (19) [2021-12-06 19:40:45,993 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 208 transitions. [2021-12-06 19:40:45,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-06 19:40:45,997 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:40:45,997 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] [2021-12-06 19:40:46,023 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 19:40:46,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:40:46,199 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:40:46,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:40:46,199 INFO L85 PathProgramCache]: Analyzing trace with hash 577933322, now seen corresponding path program 1 times [2021-12-06 19:40:46,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:40:46,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421021291] [2021-12-06 19:40:46,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:40:46,200 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:40:46,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:40:46,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 19:40:46,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:40:46,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:40:46,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:40:46,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 19:40:46,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:40:46,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-06 19:40:46,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:40:46,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-06 19:40:46,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:40:46,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-06 19:40:46,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:40:46,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-06 19:40:46,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:40:46,317 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-06 19:40:46,317 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:40:46,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421021291] [2021-12-06 19:40:46,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421021291] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:40:46,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076421548] [2021-12-06 19:40:46,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:40:46,318 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:40:46,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:40:46,319 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:40:46,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 19:40:46,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:40:46,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 19:40:46,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:40:46,489 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 19:40:46,489 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:40:46,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076421548] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:40:46,489 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:40:46,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 11 [2021-12-06 19:40:46,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148254519] [2021-12-06 19:40:46,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:40:46,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 19:40:46,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:40:46,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 19:40:46,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-12-06 19:40:46,491 INFO L87 Difference]: Start difference. First operand 139 states and 208 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) [2021-12-06 19:40:46,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:40:46,600 INFO L93 Difference]: Finished difference Result 259 states and 395 transitions. [2021-12-06 19:40:46,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 19:40:46,601 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 [2021-12-06 19:40:46,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:40:46,602 INFO L225 Difference]: With dead ends: 259 [2021-12-06 19:40:46,603 INFO L226 Difference]: Without dead ends: 150 [2021-12-06 19:40:46,604 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-12-06 19:40:46,605 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 [2021-12-06 19:40:46,605 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] [2021-12-06 19:40:46,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-12-06 19:40:46,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 145. [2021-12-06 19:40:46,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 108 states have (on average 1.3611111111111112) internal successors, (147), 116 states have internal predecessors, (147), 22 states have call successors, (22), 8 states have call predecessors, (22), 14 states have return successors, (49), 20 states have call predecessors, (49), 21 states have call successors, (49) [2021-12-06 19:40:46,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 218 transitions. [2021-12-06 19:40:46,620 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 218 transitions. Word has length 70 [2021-12-06 19:40:46,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:40:46,620 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 218 transitions. [2021-12-06 19:40:46,620 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) [2021-12-06 19:40:46,620 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 218 transitions. [2021-12-06 19:40:46,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-06 19:40:46,622 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:40:46,622 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] [2021-12-06 19:40:46,642 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-06 19:40:46,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:40:46,824 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:40:46,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:40:46,825 INFO L85 PathProgramCache]: Analyzing trace with hash -34807881, now seen corresponding path program 1 times [2021-12-06 19:40:46,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:40:46,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458749] [2021-12-06 19:40:46,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:40:46,827 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:40:46,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:40:46,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 19:40:46,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:40:46,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:40:46,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:40:46,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 19:40:46,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:40:47,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 19:40:47,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:40:47,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-06 19:40:47,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:40:47,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-06 19:40:47,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:40:47,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-06 19:40:47,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:40:47,049 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-06 19:40:47,049 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:40:47,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458749] [2021-12-06 19:40:47,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458749] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:40:47,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619832151] [2021-12-06 19:40:47,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:40:47,050 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:40:47,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:40:47,050 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:40:47,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 19:40:47,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:40:47,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 19:40:47,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:40:47,247 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 19:40:47,247 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:40:47,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619832151] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:40:47,247 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:40:47,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 13 [2021-12-06 19:40:47,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239877804] [2021-12-06 19:40:47,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:40:47,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 19:40:47,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:40:47,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 19:40:47,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-12-06 19:40:47,249 INFO L87 Difference]: Start difference. First operand 145 states and 218 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) [2021-12-06 19:40:47,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:40:47,395 INFO L93 Difference]: Finished difference Result 299 states and 464 transitions. [2021-12-06 19:40:47,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 19:40:47,395 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 [2021-12-06 19:40:47,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:40:47,398 INFO L225 Difference]: With dead ends: 299 [2021-12-06 19:40:47,398 INFO L226 Difference]: Without dead ends: 184 [2021-12-06 19:40:47,399 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-12-06 19:40:47,400 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, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:40:47,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 291 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 19:40:47,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-12-06 19:40:47,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 149. [2021-12-06 19:40:47,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 112 states have (on average 1.3660714285714286) internal successors, (153), 120 states have internal predecessors, (153), 22 states have call successors, (22), 8 states have call predecessors, (22), 14 states have return successors, (49), 20 states have call predecessors, (49), 21 states have call successors, (49) [2021-12-06 19:40:47,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 224 transitions. [2021-12-06 19:40:47,422 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 224 transitions. Word has length 72 [2021-12-06 19:40:47,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:40:47,422 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 224 transitions. [2021-12-06 19:40:47,423 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) [2021-12-06 19:40:47,423 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 224 transitions. [2021-12-06 19:40:47,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-06 19:40:47,425 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:40:47,425 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] [2021-12-06 19:40:47,446 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 19:40:47,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:40:47,627 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:40:47,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:40:47,628 INFO L85 PathProgramCache]: Analyzing trace with hash 387052583, now seen corresponding path program 1 times [2021-12-06 19:40:47,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:40:47,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46140068] [2021-12-06 19:40:47,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:40:47,629 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:40:47,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:40:47,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 19:40:47,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:40:47,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:40:47,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:40:47,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 19:40:47,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:40:47,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-06 19:40:47,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:40:47,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 19:40:47,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:40:47,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 19:40:47,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:40:47,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-06 19:40:47,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:40:47,781 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-12-06 19:40:47,781 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:40:47,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46140068] [2021-12-06 19:40:47,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46140068] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:40:47,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74524163] [2021-12-06 19:40:47,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:40:47,782 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:40:47,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:40:47,782 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:40:47,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 19:40:47,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:40:47,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 19:40:47,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:40:47,946 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-06 19:40:47,946 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:40:47,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74524163] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:40:47,946 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:40:47,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-12-06 19:40:47,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127711093] [2021-12-06 19:40:47,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:40:47,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:40:47,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:40:47,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:40:47,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:40:47,948 INFO L87 Difference]: Start difference. First operand 149 states and 224 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) [2021-12-06 19:40:47,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:40:47,971 INFO L93 Difference]: Finished difference Result 294 states and 468 transitions. [2021-12-06 19:40:47,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:40:47,971 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 [2021-12-06 19:40:47,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:40:47,973 INFO L225 Difference]: With dead ends: 294 [2021-12-06 19:40:47,973 INFO L226 Difference]: Without dead ends: 175 [2021-12-06 19:40:47,975 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 [2021-12-06 19:40:47,975 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 [2021-12-06 19:40:47,976 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] [2021-12-06 19:40:47,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-12-06 19:40:47,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 151. [2021-12-06 19:40:47,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 114 states have (on average 1.3508771929824561) internal successors, (154), 122 states have internal predecessors, (154), 22 states have call successors, (22), 8 states have call predecessors, (22), 14 states have return successors, (49), 20 states have call predecessors, (49), 21 states have call successors, (49) [2021-12-06 19:40:47,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 225 transitions. [2021-12-06 19:40:47,994 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 225 transitions. Word has length 73 [2021-12-06 19:40:47,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:40:47,994 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 225 transitions. [2021-12-06 19:40:47,994 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) [2021-12-06 19:40:47,995 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 225 transitions. [2021-12-06 19:40:47,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-06 19:40:47,996 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:40:47,996 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] [2021-12-06 19:40:48,018 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 19:40:48,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:40:48,197 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:40:48,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:40:48,198 INFO L85 PathProgramCache]: Analyzing trace with hash -186702901, now seen corresponding path program 1 times [2021-12-06 19:40:48,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:40:48,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122937220] [2021-12-06 19:40:48,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:40:48,198 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:40:48,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:40:48,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 19:40:48,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:40:48,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:40:48,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:40:48,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 19:40:48,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:40:48,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 19:40:48,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:40:48,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-06 19:40:48,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:40:48,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-06 19:40:48,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:40:48,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-06 19:40:48,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:40:48,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-06 19:40:48,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:40:48,325 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-06 19:40:48,325 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:40:48,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122937220] [2021-12-06 19:40:48,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122937220] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:40:48,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219687475] [2021-12-06 19:40:48,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:40:48,326 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:40:48,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:40:48,326 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:40:48,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 19:40:48,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:40:48,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 50 conjunts are in the unsatisfiable core [2021-12-06 19:40:48,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:40:48,490 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 19:40:48,490 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 9 treesize of output 15 [2021-12-06 19:40:48,498 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 19:40:48,498 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 9 treesize of output 15 [2021-12-06 19:40:49,218 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 27 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 19:40:49,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:40:49,617 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-06 19:40:49,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219687475] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:40:49,618 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:40:49,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 15, 10] total 27 [2021-12-06 19:40:49,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329695004] [2021-12-06 19:40:49,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:40:49,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-06 19:40:49,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:40:49,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-06 19:40:49,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2021-12-06 19:40:49,620 INFO L87 Difference]: Start difference. First operand 151 states and 225 transitions. Second operand has 27 states, 26 states have (on average 4.653846153846154) internal successors, (121), 24 states have internal predecessors, (121), 10 states have call successors, (22), 4 states have call predecessors, (22), 8 states have return successors, (22), 9 states have call predecessors, (22), 10 states have call successors, (22) [2021-12-06 19:40:50,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:40:50,218 INFO L93 Difference]: Finished difference Result 342 states and 517 transitions. [2021-12-06 19:40:50,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-06 19:40:50,219 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 4.653846153846154) internal successors, (121), 24 states have internal predecessors, (121), 10 states have call successors, (22), 4 states have call predecessors, (22), 8 states have return successors, (22), 9 states have call predecessors, (22), 10 states have call successors, (22) Word has length 83 [2021-12-06 19:40:50,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:40:50,221 INFO L225 Difference]: With dead ends: 342 [2021-12-06 19:40:50,221 INFO L226 Difference]: Without dead ends: 221 [2021-12-06 19:40:50,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 161 SyntacticMatches, 7 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=244, Invalid=1826, Unknown=0, NotChecked=0, Total=2070 [2021-12-06 19:40:50,223 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 100 mSDsluCounter, 1302 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 1388 SdHoareTripleChecker+Invalid, 700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 116 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 19:40:50,223 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 1388 Invalid, 700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 557 Invalid, 0 Unknown, 116 Unchecked, 0.3s Time] [2021-12-06 19:40:50,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-12-06 19:40:50,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 175. [2021-12-06 19:40:50,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 134 states have (on average 1.3507462686567164) internal successors, (181), 144 states have internal predecessors, (181), 22 states have call successors, (22), 10 states have call predecessors, (22), 18 states have return successors, (54), 20 states have call predecessors, (54), 21 states have call successors, (54) [2021-12-06 19:40:50,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 257 transitions. [2021-12-06 19:40:50,236 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 257 transitions. Word has length 83 [2021-12-06 19:40:50,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:40:50,236 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 257 transitions. [2021-12-06 19:40:50,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 4.653846153846154) internal successors, (121), 24 states have internal predecessors, (121), 10 states have call successors, (22), 4 states have call predecessors, (22), 8 states have return successors, (22), 9 states have call predecessors, (22), 10 states have call successors, (22) [2021-12-06 19:40:50,237 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 257 transitions. [2021-12-06 19:40:50,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-12-06 19:40:50,238 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:40:50,238 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] [2021-12-06 19:40:50,259 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 19:40:50,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:40:50,438 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:40:50,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:40:50,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1220157194, now seen corresponding path program 1 times [2021-12-06 19:40:50,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:40:50,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192412186] [2021-12-06 19:40:50,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:40:50,439 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:40:50,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:40:50,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 19:40:50,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:40:50,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:40:50,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:40:50,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 19:40:50,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:40:50,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 19:40:50,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:40:50,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 19:40:50,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:40:50,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 19:40:50,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:40:50,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-06 19:40:50,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:40:50,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 19:40:50,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:40:50,586 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-06 19:40:50,586 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:40:50,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192412186] [2021-12-06 19:40:50,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192412186] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:40:50,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65106856] [2021-12-06 19:40:50,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:40:50,586 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:40:50,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:40:50,587 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:40:50,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 19:40:50,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:40:50,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 43 conjunts are in the unsatisfiable core [2021-12-06 19:40:50,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:40:50,771 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 19:40:50,771 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 9 treesize of output 15 [2021-12-06 19:40:50,780 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 19:40:50,781 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 9 treesize of output 15 [2021-12-06 19:40:51,922 WARN L860 $PredicateComparison]: unable to prove that (or (exists ((|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_BEFORE_CALL_1| Int) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_BEFORE_CALL_1| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_BEFORE_CALL_1|) |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_BEFORE_CALL_1|) 0))) (exists ((|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_BEFORE_CALL_1| Int) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_BEFORE_CALL_1| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_BEFORE_CALL_1|) |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_BEFORE_CALL_1|) 0)))) is different from true [2021-12-06 19:40:52,048 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 26 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-06 19:40:52,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:40:52,152 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-06 19:40:52,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65106856] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:40:52,152 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:40:52,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 8] total 18 [2021-12-06 19:40:52,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78272472] [2021-12-06 19:40:52,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:40:52,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-06 19:40:52,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:40:52,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-06 19:40:52,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=228, Unknown=1, NotChecked=30, Total=306 [2021-12-06 19:40:52,154 INFO L87 Difference]: Start difference. First operand 175 states and 257 transitions. Second operand has 18 states, 18 states have (on average 5.166666666666667) internal successors, (93), 18 states have internal predecessors, (93), 6 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 6 states have call successors, (16) [2021-12-06 19:40:52,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:40:52,516 INFO L93 Difference]: Finished difference Result 572 states and 935 transitions. [2021-12-06 19:40:52,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-06 19:40:52,517 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.166666666666667) internal successors, (93), 18 states have internal predecessors, (93), 6 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 6 states have call successors, (16) Word has length 85 [2021-12-06 19:40:52,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:40:52,521 INFO L225 Difference]: With dead ends: 572 [2021-12-06 19:40:52,521 INFO L226 Difference]: Without dead ends: 431 [2021-12-06 19:40:52,523 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 181 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=110, Invalid=445, Unknown=1, NotChecked=44, Total=600 [2021-12-06 19:40:52,524 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 201 mSDsluCounter, 596 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 673 SdHoareTripleChecker+Invalid, 650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 174 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 19:40:52,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 673 Invalid, 650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 452 Invalid, 0 Unknown, 174 Unchecked, 0.2s Time] [2021-12-06 19:40:52,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2021-12-06 19:40:52,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 230. [2021-12-06 19:40:52,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 185 states have (on average 1.3837837837837839) internal successors, (256), 195 states have internal predecessors, (256), 25 states have call successors, (25), 11 states have call predecessors, (25), 19 states have return successors, (60), 23 states have call predecessors, (60), 24 states have call successors, (60) [2021-12-06 19:40:52,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 341 transitions. [2021-12-06 19:40:52,558 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 341 transitions. Word has length 85 [2021-12-06 19:40:52,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:40:52,558 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 341 transitions. [2021-12-06 19:40:52,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.166666666666667) internal successors, (93), 18 states have internal predecessors, (93), 6 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 6 states have call successors, (16) [2021-12-06 19:40:52,558 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 341 transitions. [2021-12-06 19:40:52,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-06 19:40:52,560 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:40:52,561 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] [2021-12-06 19:40:52,585 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-06 19:40:52,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:40:52,762 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:40:52,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:40:52,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1281472374, now seen corresponding path program 1 times [2021-12-06 19:40:52,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:40:52,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765261014] [2021-12-06 19:40:52,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:40:52,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:40:52,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:40:52,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 19:40:52,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:40:52,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:40:52,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:40:52,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 19:40:52,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:40:52,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 19:40:52,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:40:52,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-06 19:40:52,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:40:52,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-06 19:40:52,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:40:52,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-06 19:40:52,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:40:52,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-06 19:40:52,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:40:52,912 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-06 19:40:52,912 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:40:52,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765261014] [2021-12-06 19:40:52,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765261014] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:40:52,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905307770] [2021-12-06 19:40:52,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:40:52,912 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:40:52,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:40:52,913 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:40:52,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 19:40:52,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:40:53,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 19:40:53,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:40:53,054 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-06 19:40:53,054 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:40:53,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905307770] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:40:53,054 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:40:53,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2021-12-06 19:40:53,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311551226] [2021-12-06 19:40:53,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:40:53,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 19:40:53,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:40:53,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 19:40:53,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 19:40:53,055 INFO L87 Difference]: Start difference. First operand 230 states and 341 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 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) [2021-12-06 19:40:53,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:40:53,074 INFO L93 Difference]: Finished difference Result 410 states and 647 transitions. [2021-12-06 19:40:53,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 19:40:53,074 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 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 [2021-12-06 19:40:53,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:40:53,076 INFO L225 Difference]: With dead ends: 410 [2021-12-06 19:40:53,076 INFO L226 Difference]: Without dead ends: 218 [2021-12-06 19:40:53,077 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 [2021-12-06 19:40:53,078 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 8 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:40:53,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 244 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:40:53,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-12-06 19:40:53,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 215. [2021-12-06 19:40:53,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 170 states have (on average 1.3470588235294119) internal successors, (229), 180 states have internal predecessors, (229), 25 states have call successors, (25), 11 states have call predecessors, (25), 19 states have return successors, (60), 23 states have call predecessors, (60), 24 states have call successors, (60) [2021-12-06 19:40:53,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 314 transitions. [2021-12-06 19:40:53,096 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 314 transitions. Word has length 83 [2021-12-06 19:40:53,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:40:53,097 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 314 transitions. [2021-12-06 19:40:53,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 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) [2021-12-06 19:40:53,097 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 314 transitions. [2021-12-06 19:40:53,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-06 19:40:53,099 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:40:53,099 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:40:53,119 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-06 19:40:53,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-12-06 19:40:53,301 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:40:53,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:40:53,302 INFO L85 PathProgramCache]: Analyzing trace with hash -1051920264, now seen corresponding path program 1 times [2021-12-06 19:40:53,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:40:53,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232409369] [2021-12-06 19:40:53,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:40:53,303 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:40:53,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:40:53,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 19:40:53,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:40:53,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:40:53,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:40:53,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 19:40:53,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:40:53,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 19:40:53,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:40:53,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-06 19:40:53,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:40:53,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-06 19:40:53,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:40:53,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-06 19:40:53,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:40:53,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-06 19:40:53,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:40:53,494 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-06 19:40:53,494 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:40:53,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232409369] [2021-12-06 19:40:53,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232409369] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:40:53,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586708713] [2021-12-06 19:40:53,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:40:53,495 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:40:53,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:40:53,496 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:40:53,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-06 19:40:53,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:40:53,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 19:40:53,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:40:53,651 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-06 19:40:53,651 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:40:53,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586708713] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:40:53,652 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:40:53,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 7 [2021-12-06 19:40:53,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918416164] [2021-12-06 19:40:53,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:40:53,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 19:40:53,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:40:53,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 19:40:53,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 19:40:53,653 INFO L87 Difference]: Start difference. First operand 215 states and 314 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 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) [2021-12-06 19:40:53,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:40:53,671 INFO L93 Difference]: Finished difference Result 323 states and 488 transitions. [2021-12-06 19:40:53,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 19:40:53,672 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 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 [2021-12-06 19:40:53,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:40:53,673 INFO L225 Difference]: With dead ends: 323 [2021-12-06 19:40:53,673 INFO L226 Difference]: Without dead ends: 136 [2021-12-06 19:40:53,674 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-06 19:40:53,674 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 [2021-12-06 19:40:53,674 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] [2021-12-06 19:40:53,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-12-06 19:40:53,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 129. [2021-12-06 19:40:53,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 98 states have (on average 1.2346938775510203) internal successors, (121), 104 states have internal predecessors, (121), 17 states have call successors, (17), 9 states have call predecessors, (17), 13 states have return successors, (29), 15 states have call predecessors, (29), 16 states have call successors, (29) [2021-12-06 19:40:53,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 167 transitions. [2021-12-06 19:40:53,681 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 167 transitions. Word has length 83 [2021-12-06 19:40:53,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:40:53,681 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 167 transitions. [2021-12-06 19:40:53,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 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) [2021-12-06 19:40:53,682 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 167 transitions. [2021-12-06 19:40:53,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-12-06 19:40:53,682 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:40:53,683 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:40:53,703 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-06 19:40:53,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-06 19:40:53,883 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:40:53,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:40:53,884 INFO L85 PathProgramCache]: Analyzing trace with hash 806524548, now seen corresponding path program 1 times [2021-12-06 19:40:53,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:40:53,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863035037] [2021-12-06 19:40:53,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:40:53,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:40:53,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:40:53,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 19:40:53,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:40:53,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:40:53,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:40:53,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 19:40:53,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:40:53,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 19:40:53,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:40:53,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-06 19:40:53,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:40:53,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-06 19:40:53,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:40:53,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-06 19:40:53,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:40:53,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-06 19:40:53,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:40:54,003 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-06 19:40:54,003 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:40:54,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863035037] [2021-12-06 19:40:54,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863035037] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:40:54,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994365160] [2021-12-06 19:40:54,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:40:54,003 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:40:54,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:40:54,004 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:40:54,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-06 19:40:54,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:40:54,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 60 conjunts are in the unsatisfiable core [2021-12-06 19:40:54,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:40:54,171 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2021-12-06 19:40:54,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:40:54,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-06 19:40:54,214 INFO L354 Elim1Store]: treesize reduction 38, result has 22.4 percent of original size [2021-12-06 19:40:54,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 66 treesize of output 63 [2021-12-06 19:40:54,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:40:54,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 45 [2021-12-06 19:40:54,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2021-12-06 19:40:54,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:40:54,229 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 0 case distinctions, treesize of input 31 treesize of output 23 [2021-12-06 19:40:54,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 19:40:56,265 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_25| Int)) (< (+ (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_25|) 0) 1) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_25|)) is different from true [2021-12-06 19:41:08,508 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 19:41:08,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:41:10,737 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_920 (Array Int Int)) (v_ArrVal_921 (Array Int Int)) (v_ArrVal_923 Int)) (not (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_920) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_921) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24) v_ArrVal_923)) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.offset|) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base|))) is different from false [2021-12-06 19:41:10,751 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:41:10,751 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 33 [2021-12-06 19:41:10,762 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:41:10,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 306 treesize of output 284 [2021-12-06 19:41:10,768 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 306 treesize of output 298 [2021-12-06 19:41:10,775 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 298 treesize of output 294 [2021-12-06 19:41:10,837 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 6 treesize of output 4 [2021-12-06 19:41:10,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2021-12-06 19:41:10,880 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:41:10,880 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 65 treesize of output 63 [2021-12-06 19:41:10,992 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 25 trivial. 1 not checked. [2021-12-06 19:41:10,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994365160] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:41:10,992 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:41:10,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 13, 11] total 26 [2021-12-06 19:41:10,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523648509] [2021-12-06 19:41:10,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:41:10,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-06 19:41:10,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:41:10,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-06 19:41:10,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=488, Unknown=3, NotChecked=90, Total=650 [2021-12-06 19:41:10,994 INFO L87 Difference]: Start difference. First operand 129 states and 167 transitions. Second operand has 26 states, 25 states have (on average 4.88) internal successors, (122), 25 states have internal predecessors, (122), 9 states have call successors, (24), 3 states have call predecessors, (24), 7 states have return successors, (23), 7 states have call predecessors, (23), 9 states have call successors, (23) [2021-12-06 19:41:19,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:41:19,819 INFO L93 Difference]: Finished difference Result 350 states and 516 transitions. [2021-12-06 19:41:19,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-06 19:41:19,819 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 4.88) internal successors, (122), 25 states have internal predecessors, (122), 9 states have call successors, (24), 3 states have call predecessors, (24), 7 states have return successors, (23), 7 states have call predecessors, (23), 9 states have call successors, (23) Word has length 86 [2021-12-06 19:41:19,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:41:19,821 INFO L225 Difference]: With dead ends: 350 [2021-12-06 19:41:19,821 INFO L226 Difference]: Without dead ends: 218 [2021-12-06 19:41:19,822 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 24.6s TimeCoverageRelationStatistics Valid=167, Invalid=1244, Unknown=3, NotChecked=146, Total=1560 [2021-12-06 19:41:19,822 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 146 mSDsluCounter, 1264 mSDsCounter, 0 mSdLazyCounter, 904 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 1379 SdHoareTripleChecker+Invalid, 1832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 904 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 814 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 19:41:19,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 1379 Invalid, 1832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 904 Invalid, 0 Unknown, 814 Unchecked, 0.5s Time] [2021-12-06 19:41:19,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-12-06 19:41:19,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 180. [2021-12-06 19:41:19,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 138 states have (on average 1.2173913043478262) internal successors, (168), 144 states have internal predecessors, (168), 26 states have call successors, (26), 11 states have call predecessors, (26), 15 states have return successors, (48), 24 states have call predecessors, (48), 25 states have call successors, (48) [2021-12-06 19:41:19,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 242 transitions. [2021-12-06 19:41:19,846 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 242 transitions. Word has length 86 [2021-12-06 19:41:19,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:41:19,847 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 242 transitions. [2021-12-06 19:41:19,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 4.88) internal successors, (122), 25 states have internal predecessors, (122), 9 states have call successors, (24), 3 states have call predecessors, (24), 7 states have return successors, (23), 7 states have call predecessors, (23), 9 states have call successors, (23) [2021-12-06 19:41:19,847 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 242 transitions. [2021-12-06 19:41:19,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-06 19:41:19,848 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:41:19,848 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, 1, 1] [2021-12-06 19:41:19,881 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-06 19:41:20,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-06 19:41:20,049 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:41:20,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:41:20,050 INFO L85 PathProgramCache]: Analyzing trace with hash -216003458, now seen corresponding path program 1 times [2021-12-06 19:41:20,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:41:20,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502773785] [2021-12-06 19:41:20,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:41:20,051 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:41:20,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:41:20,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 19:41:20,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:41:20,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:41:20,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:41:20,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-06 19:41:20,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:41:20,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 19:41:20,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:41:20,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-06 19:41:20,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:41:20,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-06 19:41:20,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:41:20,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-06 19:41:20,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:41:20,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-06 19:41:20,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:41:20,201 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-06 19:41:20,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:41:20,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502773785] [2021-12-06 19:41:20,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502773785] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:41:20,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089289568] [2021-12-06 19:41:20,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:41:20,202 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:41:20,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:41:20,203 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:41:20,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-06 19:41:20,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:41:20,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-06 19:41:20,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:41:20,443 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-06 19:41:20,443 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:41:20,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089289568] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:41:20,443 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:41:20,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 13 [2021-12-06 19:41:20,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587853420] [2021-12-06 19:41:20,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:41:20,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 19:41:20,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:41:20,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 19:41:20,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-12-06 19:41:20,444 INFO L87 Difference]: Start difference. First operand 180 states and 242 transitions. Second operand has 8 states, 7 states have (on average 9.571428571428571) internal successors, (67), 8 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) [2021-12-06 19:41:20,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:41:20,550 INFO L93 Difference]: Finished difference Result 282 states and 381 transitions. [2021-12-06 19:41:20,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 19:41:20,551 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.571428571428571) internal successors, (67), 8 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 90 [2021-12-06 19:41:20,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:41:20,553 INFO L225 Difference]: With dead ends: 282 [2021-12-06 19:41:20,553 INFO L226 Difference]: Without dead ends: 177 [2021-12-06 19:41:20,554 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-12-06 19:41:20,555 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 107 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 295 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 [2021-12-06 19:41:20,555 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 295 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 19:41:20,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-12-06 19:41:20,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2021-12-06 19:41:20,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 136 states have (on average 1.213235294117647) internal successors, (165), 141 states have internal predecessors, (165), 26 states have call successors, (26), 11 states have call predecessors, (26), 14 states have return successors, (44), 24 states have call predecessors, (44), 25 states have call successors, (44) [2021-12-06 19:41:20,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 235 transitions. [2021-12-06 19:41:20,573 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 235 transitions. Word has length 90 [2021-12-06 19:41:20,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:41:20,573 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 235 transitions. [2021-12-06 19:41:20,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.571428571428571) internal successors, (67), 8 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) [2021-12-06 19:41:20,574 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 235 transitions. [2021-12-06 19:41:20,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-06 19:41:20,575 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:41:20,575 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, 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] [2021-12-06 19:41:20,597 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-06 19:41:20,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:41:20,776 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:41:20,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:41:20,777 INFO L85 PathProgramCache]: Analyzing trace with hash -104570939, now seen corresponding path program 1 times [2021-12-06 19:41:20,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:41:20,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435251650] [2021-12-06 19:41:20,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:41:20,778 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:41:20,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:41:20,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 19:41:20,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:41:20,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:41:20,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:41:20,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-06 19:41:20,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:41:20,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 19:41:20,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:41:20,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-06 19:41:20,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:41:20,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-06 19:41:20,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:41:20,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 19:41:20,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:41:20,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-06 19:41:20,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:41:20,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-06 19:41:20,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:41:20,981 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-12-06 19:41:20,981 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:41:20,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435251650] [2021-12-06 19:41:20,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435251650] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:41:20,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80794350] [2021-12-06 19:41:20,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:41:20,982 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:41:20,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:41:20,983 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:41:20,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-06 19:41:21,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:41:21,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 60 conjunts are in the unsatisfiable core [2021-12-06 19:41:21,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:41:21,189 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2021-12-06 19:41:21,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:41:21,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-06 19:41:21,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:41:21,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:41:21,247 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 19:41:21,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 25 [2021-12-06 19:41:21,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:41:21,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:41:21,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 41 treesize of output 29 [2021-12-06 19:41:21,974 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 45 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 19:41:21,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:41:32,821 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:41:32,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 41 [2021-12-06 19:41:32,856 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_arrayElimArr_6 (Array Int Int)) (|ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| Int) (v_ArrVal_1253 Int) (v_ArrVal_1247 (Array Int Int)) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_13| Int)) (or (not (= (select v_arrayElimArr_6 |ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset|) (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 16))) (<= |c_#StackHeapBarrier| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_13|) (not (= (+ 16 |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.offset|) (select (select (let ((.cse0 (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_1247) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_13| v_arrayElimArr_6))) (store .cse0 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse0 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24) v_ArrVal_1253))) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.offset|))))) is different from false [2021-12-06 19:41:32,900 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:41:32,901 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 41 [2021-12-06 19:41:32,922 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:41:32,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 4679 treesize of output 4613 [2021-12-06 19:41:32,957 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:41:32,958 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 5071 treesize of output 4901 [2021-12-06 19:41:33,019 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 5846 treesize of output 5662 [2021-12-06 19:41:33,634 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 28 treesize of output 26 [2021-12-06 19:41:33,666 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 [2021-12-06 19:41:33,699 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:41:33,699 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 63 treesize of output 65 [2021-12-06 19:41:33,825 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 32 trivial. 3 not checked. [2021-12-06 19:41:33,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80794350] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:41:33,825 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:41:33,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 13, 12] total 28 [2021-12-06 19:41:33,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665131045] [2021-12-06 19:41:33,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:41:33,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-06 19:41:33,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:41:33,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-06 19:41:33,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=615, Unknown=5, NotChecked=50, Total=756 [2021-12-06 19:41:33,826 INFO L87 Difference]: Start difference. First operand 177 states and 235 transitions. Second operand has 28 states, 27 states have (on average 5.185185185185185) internal successors, (140), 27 states have internal predecessors, (140), 9 states have call successors, (25), 3 states have call predecessors, (25), 7 states have return successors, (24), 7 states have call predecessors, (24), 9 states have call successors, (24) [2021-12-06 19:41:34,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:41:34,771 INFO L93 Difference]: Finished difference Result 360 states and 511 transitions. [2021-12-06 19:41:34,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-06 19:41:34,772 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 5.185185185185185) internal successors, (140), 27 states have internal predecessors, (140), 9 states have call successors, (25), 3 states have call predecessors, (25), 7 states have return successors, (24), 7 states have call predecessors, (24), 9 states have call successors, (24) Word has length 101 [2021-12-06 19:41:34,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:41:34,773 INFO L225 Difference]: With dead ends: 360 [2021-12-06 19:41:34,773 INFO L226 Difference]: Without dead ends: 239 [2021-12-06 19:41:34,775 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 200 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=234, Invalid=1657, Unknown=5, NotChecked=84, Total=1980 [2021-12-06 19:41:34,775 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 143 mSDsluCounter, 1093 mSDsCounter, 0 mSdLazyCounter, 606 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 1180 SdHoareTripleChecker+Invalid, 957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 288 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 19:41:34,775 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 1180 Invalid, 957 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 606 Invalid, 0 Unknown, 288 Unchecked, 0.4s Time] [2021-12-06 19:41:34,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-12-06 19:41:34,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 202. [2021-12-06 19:41:34,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 158 states have (on average 1.2088607594936709) internal successors, (191), 163 states have internal predecessors, (191), 28 states have call successors, (28), 13 states have call predecessors, (28), 15 states have return successors, (42), 25 states have call predecessors, (42), 27 states have call successors, (42) [2021-12-06 19:41:34,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 261 transitions. [2021-12-06 19:41:34,791 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 261 transitions. Word has length 101 [2021-12-06 19:41:34,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:41:34,791 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 261 transitions. [2021-12-06 19:41:34,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 5.185185185185185) internal successors, (140), 27 states have internal predecessors, (140), 9 states have call successors, (25), 3 states have call predecessors, (25), 7 states have return successors, (24), 7 states have call predecessors, (24), 9 states have call successors, (24) [2021-12-06 19:41:34,791 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 261 transitions. [2021-12-06 19:41:34,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-12-06 19:41:34,792 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:41:34,792 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] [2021-12-06 19:41:34,813 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-06 19:41:34,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:41:34,993 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:41:34,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:41:34,993 INFO L85 PathProgramCache]: Analyzing trace with hash 2047426688, now seen corresponding path program 1 times [2021-12-06 19:41:34,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:41:34,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108185879] [2021-12-06 19:41:34,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:41:34,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:41:35,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:41:35,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 19:41:35,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:41:35,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:41:35,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:41:35,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 19:41:35,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:41:35,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 19:41:35,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:41:35,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-06 19:41:35,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:41:35,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-06 19:41:35,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:41:35,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 19:41:35,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:41:35,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-06 19:41:35,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:41:35,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-06 19:41:35,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:41:35,242 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-12-06 19:41:35,243 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:41:35,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108185879] [2021-12-06 19:41:35,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108185879] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:41:35,243 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:41:35,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-06 19:41:35,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522346303] [2021-12-06 19:41:35,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:41:35,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 19:41:35,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:41:35,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 19:41:35,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-12-06 19:41:35,244 INFO L87 Difference]: Start difference. First operand 202 states and 261 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-06 19:41:35,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:41:35,453 INFO L93 Difference]: Finished difference Result 281 states and 365 transitions. [2021-12-06 19:41:35,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 19:41:35,454 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 100 [2021-12-06 19:41:35,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:41:35,455 INFO L225 Difference]: With dead ends: 281 [2021-12-06 19:41:35,455 INFO L226 Difference]: Without dead ends: 202 [2021-12-06 19:41:35,456 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-12-06 19:41:35,456 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 53 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:41:35,456 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 381 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 19:41:35,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-12-06 19:41:35,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 200. [2021-12-06 19:41:35,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 156 states have (on average 1.1987179487179487) internal successors, (187), 161 states have internal predecessors, (187), 28 states have call successors, (28), 13 states have call predecessors, (28), 15 states have return successors, (42), 25 states have call predecessors, (42), 27 states have call successors, (42) [2021-12-06 19:41:35,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 257 transitions. [2021-12-06 19:41:35,472 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 257 transitions. Word has length 100 [2021-12-06 19:41:35,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:41:35,473 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 257 transitions. [2021-12-06 19:41:35,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-06 19:41:35,473 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 257 transitions. [2021-12-06 19:41:35,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-12-06 19:41:35,474 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:41:35,474 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] [2021-12-06 19:41:35,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-06 19:41:35,474 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:41:35,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:41:35,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1654399678, now seen corresponding path program 1 times [2021-12-06 19:41:35,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:41:35,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308626892] [2021-12-06 19:41:35,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:41:35,475 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:41:35,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:41:35,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 19:41:35,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:41:35,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:41:35,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:41:35,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 19:41:35,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:41:35,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 19:41:35,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:41:35,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-06 19:41:35,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:41:35,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-06 19:41:35,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:41:35,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 19:41:35,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:41:35,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-06 19:41:35,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:41:35,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-06 19:41:35,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:41:35,826 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 7 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-12-06 19:41:35,827 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:41:35,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308626892] [2021-12-06 19:41:35,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308626892] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:41:35,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440593477] [2021-12-06 19:41:35,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:41:35,827 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:41:35,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:41:35,828 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:41:35,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-06 19:41:35,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:41:35,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 46 conjunts are in the unsatisfiable core [2021-12-06 19:41:35,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:41:36,008 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 19:41:36,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 19:41:36,021 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 19:41:36,021 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 9 treesize of output 15 [2021-12-06 19:41:37,091 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 32 proven. 28 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 19:41:37,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:41:37,471 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 10 proven. 33 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-06 19:41:37,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440593477] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:41:37,471 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:41:37,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16, 12] total 30 [2021-12-06 19:41:37,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689671225] [2021-12-06 19:41:37,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:41:37,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-06 19:41:37,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:41:37,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-06 19:41:37,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=752, Unknown=0, NotChecked=0, Total=870 [2021-12-06 19:41:37,472 INFO L87 Difference]: Start difference. First operand 200 states and 257 transitions. Second operand has 30 states, 30 states have (on average 4.7) internal successors, (141), 28 states have internal predecessors, (141), 12 states have call successors, (24), 4 states have call predecessors, (24), 6 states have return successors, (24), 11 states have call predecessors, (24), 11 states have call successors, (24) [2021-12-06 19:41:38,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:41:38,182 INFO L93 Difference]: Finished difference Result 325 states and 414 transitions. [2021-12-06 19:41:38,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-06 19:41:38,183 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.7) internal successors, (141), 28 states have internal predecessors, (141), 12 states have call successors, (24), 4 states have call predecessors, (24), 6 states have return successors, (24), 11 states have call predecessors, (24), 11 states have call successors, (24) Word has length 100 [2021-12-06 19:41:38,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:41:38,184 INFO L225 Difference]: With dead ends: 325 [2021-12-06 19:41:38,184 INFO L226 Difference]: Without dead ends: 247 [2021-12-06 19:41:38,185 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 202 SyntacticMatches, 10 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=285, Invalid=1521, Unknown=0, NotChecked=0, Total=1806 [2021-12-06 19:41:38,185 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 158 mSDsluCounter, 840 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 920 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 158 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 19:41:38,185 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 920 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 304 Invalid, 0 Unknown, 158 Unchecked, 0.2s Time] [2021-12-06 19:41:38,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-12-06 19:41:38,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 230. [2021-12-06 19:41:38,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 182 states have (on average 1.2087912087912087) internal successors, (220), 187 states have internal predecessors, (220), 30 states have call successors, (30), 15 states have call predecessors, (30), 17 states have return successors, (37), 27 states have call predecessors, (37), 29 states have call successors, (37) [2021-12-06 19:41:38,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 287 transitions. [2021-12-06 19:41:38,209 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 287 transitions. Word has length 100 [2021-12-06 19:41:38,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:41:38,209 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 287 transitions. [2021-12-06 19:41:38,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.7) internal successors, (141), 28 states have internal predecessors, (141), 12 states have call successors, (24), 4 states have call predecessors, (24), 6 states have return successors, (24), 11 states have call predecessors, (24), 11 states have call successors, (24) [2021-12-06 19:41:38,209 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 287 transitions. [2021-12-06 19:41:38,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-12-06 19:41:38,210 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:41:38,210 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] [2021-12-06 19:41:38,231 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-06 19:41:38,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-06 19:41:38,410 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:41:38,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:41:38,411 INFO L85 PathProgramCache]: Analyzing trace with hash 1912565116, now seen corresponding path program 1 times [2021-12-06 19:41:38,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:41:38,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508683353] [2021-12-06 19:41:38,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:41:38,411 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:41:38,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:41:38,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 19:41:38,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:41:38,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:41:38,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:41:38,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 19:41:38,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:41:38,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 19:41:38,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:41:38,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-06 19:41:38,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:41:38,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-06 19:41:38,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:41:38,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 19:41:38,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:41:38,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-06 19:41:38,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:41:38,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-06 19:41:38,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:41:38,657 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 10 proven. 34 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-06 19:41:38,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:41:38,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508683353] [2021-12-06 19:41:38,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508683353] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:41:38,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064699126] [2021-12-06 19:41:38,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:41:38,657 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:41:38,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:41:38,658 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:41:38,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-06 19:41:38,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:41:38,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 60 conjunts are in the unsatisfiable core [2021-12-06 19:41:38,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:41:38,845 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 19:41:38,845 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 9 treesize of output 15 [2021-12-06 19:41:39,438 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 21 proven. 41 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-06 19:41:39,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:41:39,900 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 121 treesize of output 113 [2021-12-06 19:41:39,903 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 113 treesize of output 105 [2021-12-06 19:41:39,906 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 105 treesize of output 101 [2021-12-06 19:41:39,975 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 10 proven. 35 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-06 19:41:39,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064699126] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:41:39,975 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:41:39,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17, 15] total 34 [2021-12-06 19:41:39,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418852315] [2021-12-06 19:41:39,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:41:39,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-06 19:41:39,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:41:39,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-06 19:41:39,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1004, Unknown=0, NotChecked=0, Total=1122 [2021-12-06 19:41:39,977 INFO L87 Difference]: Start difference. First operand 230 states and 287 transitions. Second operand has 34 states, 34 states have (on average 4.264705882352941) internal successors, (145), 32 states have internal predecessors, (145), 14 states have call successors, (22), 3 states have call predecessors, (22), 7 states have return successors, (22), 13 states have call predecessors, (22), 13 states have call successors, (22) [2021-12-06 19:41:40,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:41:40,798 INFO L93 Difference]: Finished difference Result 477 states and 607 transitions. [2021-12-06 19:41:40,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-06 19:41:40,798 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 4.264705882352941) internal successors, (145), 32 states have internal predecessors, (145), 14 states have call successors, (22), 3 states have call predecessors, (22), 7 states have return successors, (22), 13 states have call predecessors, (22), 13 states have call successors, (22) Word has length 100 [2021-12-06 19:41:40,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:41:40,800 INFO L225 Difference]: With dead ends: 477 [2021-12-06 19:41:40,800 INFO L226 Difference]: Without dead ends: 406 [2021-12-06 19:41:40,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 203 SyntacticMatches, 6 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 532 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=290, Invalid=2160, Unknown=0, NotChecked=0, Total=2450 [2021-12-06 19:41:40,802 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 247 mSDsluCounter, 1614 mSDsCounter, 0 mSdLazyCounter, 852 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 1725 SdHoareTripleChecker+Invalid, 1198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 852 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 278 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 19:41:40,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [270 Valid, 1725 Invalid, 1198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 852 Invalid, 0 Unknown, 278 Unchecked, 0.5s Time] [2021-12-06 19:41:40,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2021-12-06 19:41:40,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 291. [2021-12-06 19:41:40,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 231 states have (on average 1.2121212121212122) internal successors, (280), 238 states have internal predecessors, (280), 36 states have call successors, (36), 19 states have call predecessors, (36), 23 states have return successors, (48), 33 states have call predecessors, (48), 35 states have call successors, (48) [2021-12-06 19:41:40,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 364 transitions. [2021-12-06 19:41:40,825 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 364 transitions. Word has length 100 [2021-12-06 19:41:40,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:41:40,825 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 364 transitions. [2021-12-06 19:41:40,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.264705882352941) internal successors, (145), 32 states have internal predecessors, (145), 14 states have call successors, (22), 3 states have call predecessors, (22), 7 states have return successors, (22), 13 states have call predecessors, (22), 13 states have call successors, (22) [2021-12-06 19:41:40,825 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 364 transitions. [2021-12-06 19:41:40,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-12-06 19:41:40,826 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:41:40,826 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] [2021-12-06 19:41:40,848 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-06 19:41:41,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-06 19:41:41,027 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:41:41,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:41:41,027 INFO L85 PathProgramCache]: Analyzing trace with hash 901447866, now seen corresponding path program 1 times [2021-12-06 19:41:41,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:41:41,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69863036] [2021-12-06 19:41:41,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:41:41,027 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:41:41,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:41:41,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 19:41:41,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:41:41,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:41:41,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:41:41,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 19:41:41,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:41:41,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 19:41:41,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:41:41,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-06 19:41:41,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:41:41,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-06 19:41:41,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:41:41,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 19:41:41,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:41:41,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-06 19:41:41,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:41:41,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-06 19:41:41,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:41:41,157 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-12-06 19:41:41,157 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:41:41,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69863036] [2021-12-06 19:41:41,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69863036] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:41:41,157 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:41:41,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 19:41:41,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519071107] [2021-12-06 19:41:41,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:41:41,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 19:41:41,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:41:41,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 19:41:41,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 19:41:41,159 INFO L87 Difference]: Start difference. First operand 291 states and 364 transitions. Second operand has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 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) [2021-12-06 19:41:41,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:41:41,217 INFO L93 Difference]: Finished difference Result 613 states and 783 transitions. [2021-12-06 19:41:41,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 19:41:41,217 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 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 [2021-12-06 19:41:41,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:41:41,220 INFO L225 Difference]: With dead ends: 613 [2021-12-06 19:41:41,220 INFO L226 Difference]: Without dead ends: 280 [2021-12-06 19:41:41,221 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-06 19:41:41,222 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 32 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:41:41,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 396 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:41:41,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-12-06 19:41:41,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 280. [2021-12-06 19:41:41,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 221 states have (on average 1.1855203619909502) internal successors, (262), 227 states have internal predecessors, (262), 36 states have call successors, (36), 19 states have call predecessors, (36), 22 states have return successors, (45), 33 states have call predecessors, (45), 35 states have call successors, (45) [2021-12-06 19:41:41,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 343 transitions. [2021-12-06 19:41:41,250 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 343 transitions. Word has length 100 [2021-12-06 19:41:41,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:41:41,250 INFO L470 AbstractCegarLoop]: Abstraction has 280 states and 343 transitions. [2021-12-06 19:41:41,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 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) [2021-12-06 19:41:41,251 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 343 transitions. [2021-12-06 19:41:41,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-06 19:41:41,252 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:41:41,252 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] [2021-12-06 19:41:41,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-06 19:41:41,252 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:41:41,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:41:41,252 INFO L85 PathProgramCache]: Analyzing trace with hash -2065682137, now seen corresponding path program 1 times [2021-12-06 19:41:41,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:41:41,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187236977] [2021-12-06 19:41:41,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:41:41,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:41:41,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:41:41,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 19:41:41,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:41:41,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:41:41,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:41:41,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 19:41:41,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:41:41,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 19:41:41,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:41:41,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-06 19:41:41,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:41:41,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-06 19:41:41,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:41:41,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 19:41:41,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:41:41,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-06 19:41:41,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:41:41,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-06 19:41:41,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:41:41,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 19:41:41,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:41:42,000 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 12 proven. 36 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-12-06 19:41:42,000 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:41:42,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187236977] [2021-12-06 19:41:42,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187236977] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:41:42,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134051009] [2021-12-06 19:41:42,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:41:42,000 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:41:42,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:41:42,001 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:41:42,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-06 19:41:42,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:41:42,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 131 conjunts are in the unsatisfiable core [2021-12-06 19:41:42,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:41:42,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2021-12-06 19:41:42,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 19:41:42,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2021-12-06 19:41:42,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 19:41:44,926 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 54 proven. 40 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 19:41:44,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:41:56,115 WARN L227 SmtUtils]: Spent 10.11s 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) [2021-12-06 19:42:06,837 WARN L227 SmtUtils]: Spent 10.28s 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) [2021-12-06 19:42:07,944 INFO L354 Elim1Store]: treesize reduction 23, result has 86.1 percent of original size [2021-12-06 19:42:07,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 2894 treesize of output 2849 [2021-12-06 19:42:08,252 INFO L354 Elim1Store]: treesize reduction 30, result has 85.8 percent of original size [2021-12-06 19:42:08,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 30138 treesize of output 28010 [2021-12-06 19:42:08,600 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:42:08,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 36154 treesize of output 34512 [2021-12-06 19:42:09,364 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:42:09,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 33842 treesize of output 32531 [2021-12-06 19:42:10,298 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:42:10,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 36566 treesize of output 35709 [2021-12-06 19:42:12,454 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:42:12,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 33690 treesize of output 33215 [2021-12-06 19:42:13,267 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-12-06 19:42:13,267 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:42:13,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-12-06 19:42:13,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383753656] [2021-12-06 19:42:13,267 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-06 19:42:13,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-06 19:42:13,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:42:13,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-06 19:42:13,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=3877, Unknown=0, NotChecked=0, Total=4160 [2021-12-06 19:42:13,269 INFO L87 Difference]: Start difference. First operand 280 states and 343 transitions. Second operand has 23 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 20 states have internal predecessors, (62), 8 states have call successors, (10), 2 states have call predecessors, (10), 6 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2021-12-06 19:42:15,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:42:15,089 INFO L93 Difference]: Finished difference Result 493 states and 640 transitions. [2021-12-06 19:42:15,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-06 19:42:15,090 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 20 states have internal predecessors, (62), 8 states have call successors, (10), 2 states have call predecessors, (10), 6 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) Word has length 113 [2021-12-06 19:42:15,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:42:15,092 INFO L225 Difference]: With dead ends: 493 [2021-12-06 19:42:15,092 INFO L226 Difference]: Without dead ends: 397 [2021-12-06 19:42:15,094 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 185 SyntacticMatches, 7 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1789 ImplicationChecksByTransitivity, 25.1s TimeCoverageRelationStatistics Valid=600, Invalid=6882, Unknown=0, NotChecked=0, Total=7482 [2021-12-06 19:42:15,095 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 138 mSDsluCounter, 1018 mSDsCounter, 0 mSdLazyCounter, 1295 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 1094 SdHoareTripleChecker+Invalid, 1434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 1295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 19:42:15,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 1094 Invalid, 1434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 1295 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-06 19:42:15,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-12-06 19:42:15,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 314. [2021-12-06 19:42:15,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 251 states have (on average 1.1633466135458168) internal successors, (292), 257 states have internal predecessors, (292), 38 states have call successors, (38), 21 states have call predecessors, (38), 24 states have return successors, (55), 35 states have call predecessors, (55), 37 states have call successors, (55) [2021-12-06 19:42:15,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 385 transitions. [2021-12-06 19:42:15,120 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 385 transitions. Word has length 113 [2021-12-06 19:42:15,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:42:15,121 INFO L470 AbstractCegarLoop]: Abstraction has 314 states and 385 transitions. [2021-12-06 19:42:15,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 20 states have internal predecessors, (62), 8 states have call successors, (10), 2 states have call predecessors, (10), 6 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2021-12-06 19:42:15,121 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 385 transitions. [2021-12-06 19:42:15,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-12-06 19:42:15,122 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:42:15,122 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:42:15,143 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-12-06 19:42:15,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-06 19:42:15,323 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:42:15,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:42:15,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1587120971, now seen corresponding path program 1 times [2021-12-06 19:42:15,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:42:15,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527078539] [2021-12-06 19:42:15,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:42:15,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:42:15,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:42:15,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 19:42:15,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:42:15,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:42:15,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:42:15,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 19:42:15,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:42:15,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 19:42:15,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:42:15,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 19:42:15,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:42:15,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-06 19:42:15,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:42:15,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-06 19:42:15,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:42:15,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 19:42:15,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:42:15,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-06 19:42:15,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:42:15,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-06 19:42:15,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:42:15,553 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-12-06 19:42:15,554 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:42:15,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527078539] [2021-12-06 19:42:15,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527078539] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:42:15,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308826048] [2021-12-06 19:42:15,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:42:15,554 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:42:15,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:42:15,555 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:42:15,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-06 19:42:15,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:42:15,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-06 19:42:15,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:42:15,976 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-06 19:42:15,976 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:42:15,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308826048] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:42:15,976 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:42:15,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 13 [2021-12-06 19:42:15,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668009397] [2021-12-06 19:42:15,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:42:15,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 19:42:15,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:42:15,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 19:42:15,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-12-06 19:42:15,977 INFO L87 Difference]: Start difference. First operand 314 states and 385 transitions. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 8 states have internal predecessors, (76), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-06 19:42:16,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:42:16,125 INFO L93 Difference]: Finished difference Result 581 states and 746 transitions. [2021-12-06 19:42:16,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 19:42:16,126 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 8 states have internal predecessors, (76), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 110 [2021-12-06 19:42:16,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:42:16,128 INFO L225 Difference]: With dead ends: 581 [2021-12-06 19:42:16,128 INFO L226 Difference]: Without dead ends: 373 [2021-12-06 19:42:16,128 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-12-06 19:42:16,129 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 22 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:42:16,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 408 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 60 Invalid, 0 Unknown, 65 Unchecked, 0.1s Time] [2021-12-06 19:42:16,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2021-12-06 19:42:16,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 335. [2021-12-06 19:42:16,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 269 states have (on average 1.1672862453531598) internal successors, (314), 275 states have internal predecessors, (314), 38 states have call successors, (38), 21 states have call predecessors, (38), 27 states have return successors, (60), 38 states have call predecessors, (60), 37 states have call successors, (60) [2021-12-06 19:42:16,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 412 transitions. [2021-12-06 19:42:16,156 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 412 transitions. Word has length 110 [2021-12-06 19:42:16,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:42:16,156 INFO L470 AbstractCegarLoop]: Abstraction has 335 states and 412 transitions. [2021-12-06 19:42:16,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 8 states have internal predecessors, (76), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-06 19:42:16,156 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 412 transitions. [2021-12-06 19:42:16,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-06 19:42:16,157 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:42:16,158 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, 1, 1] [2021-12-06 19:42:16,178 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-06 19:42:16,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:42:16,359 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:42:16,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:42:16,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1814575175, now seen corresponding path program 1 times [2021-12-06 19:42:16,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:42:16,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943617166] [2021-12-06 19:42:16,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:42:16,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:42:16,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:42:16,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 19:42:16,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:42:16,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:42:16,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:42:16,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 19:42:16,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:42:16,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 19:42:16,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:42:16,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 19:42:16,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:42:16,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-06 19:42:16,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:42:16,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-06 19:42:16,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:42:16,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 19:42:16,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:42:16,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-06 19:42:16,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:42:16,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-06 19:42:16,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:42:16,613 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 37 proven. 11 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-12-06 19:42:16,613 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:42:16,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943617166] [2021-12-06 19:42:16,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943617166] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:42:16,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851321481] [2021-12-06 19:42:16,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:42:16,614 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:42:16,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:42:16,614 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:42:16,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-06 19:42:16,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:42:16,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 79 conjunts are in the unsatisfiable core [2021-12-06 19:42:16,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:42:16,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2021-12-06 19:42:16,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:42:16,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-06 19:42:16,894 INFO L354 Elim1Store]: treesize reduction 38, result has 22.4 percent of original size [2021-12-06 19:42:16,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 66 treesize of output 63 [2021-12-06 19:42:16,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:42:16,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 45 [2021-12-06 19:42:16,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2021-12-06 19:42:16,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:42:16,910 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 0 case distinctions, treesize of input 31 treesize of output 23 [2021-12-06 19:42:16,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 19:42:18,943 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_57| Int)) (< (+ (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_57|) 0) 1) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_57|)) is different from true [2021-12-06 19:42:21,058 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_58| Int)) (< (+ (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_58|) 0) 1) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_58|)) is different from true [2021-12-06 19:42:23,126 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_32| Int)) (< (+ (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_32|) 0) 1) |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_32|)) is different from true [2021-12-06 19:42:41,495 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 42 not checked. [2021-12-06 19:42:41,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:42:43,830 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1753 (Array Int Int)) (v_ArrVal_1752 (Array Int Int)) (v_ArrVal_1750 Int)) (not (= |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base| (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_1753) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_1752) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24) v_ArrVal_1750)) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.offset|)))) is different from false [2021-12-06 19:42:43,845 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:42:43,845 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 33 [2021-12-06 19:42:43,858 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:42:43,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 306 treesize of output 284 [2021-12-06 19:42:43,863 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 306 treesize of output 298 [2021-12-06 19:42:43,870 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 298 treesize of output 294 [2021-12-06 19:42:43,998 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 6 treesize of output 4 [2021-12-06 19:42:44,008 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 24 treesize of output 22 [2021-12-06 19:42:44,034 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:42:44,035 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 62 treesize of output 60 [2021-12-06 19:42:44,173 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 27 proven. 12 refuted. 0 times theorem prover too weak. 52 trivial. 1 not checked. [2021-12-06 19:42:44,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851321481] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:42:44,174 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:42:44,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 12] total 38 [2021-12-06 19:42:44,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117006713] [2021-12-06 19:42:44,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:42:44,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-12-06 19:42:44,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:42:44,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-12-06 19:42:44,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1023, Unknown=8, NotChecked=268, Total=1406 [2021-12-06 19:42:44,176 INFO L87 Difference]: Start difference. First operand 335 states and 412 transitions. Second operand has 38 states, 35 states have (on average 5.0) internal successors, (175), 38 states have internal predecessors, (175), 15 states have call successors, (27), 5 states have call predecessors, (27), 9 states have return successors, (26), 12 states have call predecessors, (26), 15 states have call successors, (26) [2021-12-06 19:43:30,885 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_32| Int)) (< (+ (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_32|) 0) 1) |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_32|)) (exists ((|v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_57| Int)) (< (+ (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_57|) 0) 1) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_57|))) is different from true [2021-12-06 19:44:48,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:44:48,548 INFO L93 Difference]: Finished difference Result 758 states and 1025 transitions. [2021-12-06 19:44:48,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-12-06 19:44:48,548 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 35 states have (on average 5.0) internal successors, (175), 38 states have internal predecessors, (175), 15 states have call successors, (27), 5 states have call predecessors, (27), 9 states have return successors, (26), 12 states have call predecessors, (26), 15 states have call successors, (26) Word has length 112 [2021-12-06 19:44:48,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:44:48,551 INFO L225 Difference]: With dead ends: 758 [2021-12-06 19:44:48,551 INFO L226 Difference]: Without dead ends: 605 [2021-12-06 19:44:48,553 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 226 SyntacticMatches, 5 SemanticMatches, 67 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 822 ImplicationChecksByTransitivity, 149.7s TimeCoverageRelationStatistics Valid=383, Invalid=3614, Unknown=55, NotChecked=640, Total=4692 [2021-12-06 19:44:48,553 INFO L933 BasicCegarLoop]: 170 mSDtfsCounter, 247 mSDsluCounter, 2610 mSDsCounter, 0 mSdLazyCounter, 2168 mSolverCounterSat, 243 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 2780 SdHoareTripleChecker+Invalid, 4541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 243 IncrementalHoareTripleChecker+Valid, 2168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2130 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-06 19:44:48,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 2780 Invalid, 4541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [243 Valid, 2168 Invalid, 0 Unknown, 2130 Unchecked, 1.3s Time] [2021-12-06 19:44:48,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2021-12-06 19:44:48,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 488. [2021-12-06 19:44:48,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 394 states have (on average 1.1852791878172588) internal successors, (467), 396 states have internal predecessors, (467), 54 states have call successors, (54), 28 states have call predecessors, (54), 39 states have return successors, (100), 63 states have call predecessors, (100), 53 states have call successors, (100) [2021-12-06 19:44:48,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 621 transitions. [2021-12-06 19:44:48,601 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 621 transitions. Word has length 112 [2021-12-06 19:44:48,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:44:48,601 INFO L470 AbstractCegarLoop]: Abstraction has 488 states and 621 transitions. [2021-12-06 19:44:48,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 35 states have (on average 5.0) internal successors, (175), 38 states have internal predecessors, (175), 15 states have call successors, (27), 5 states have call predecessors, (27), 9 states have return successors, (26), 12 states have call predecessors, (26), 15 states have call successors, (26) [2021-12-06 19:44:48,602 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 621 transitions. [2021-12-06 19:44:48,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-06 19:44:48,603 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:44:48,603 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] [2021-12-06 19:44:48,624 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-12-06 19:44:48,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:44:48,804 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:44:48,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:44:48,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1807516699, now seen corresponding path program 1 times [2021-12-06 19:44:48,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:44:48,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228703398] [2021-12-06 19:44:48,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:44:48,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:44:48,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:44:48,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 19:44:48,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:44:48,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:44:48,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:44:48,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 19:44:48,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:44:48,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 19:44:48,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:44:48,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-06 19:44:48,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:44:48,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-06 19:44:48,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:44:48,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 19:44:48,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:44:48,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-06 19:44:48,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:44:48,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-06 19:44:48,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:44:48,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 19:44:48,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:44:49,052 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 30 proven. 34 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-06 19:44:49,052 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:44:49,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228703398] [2021-12-06 19:44:49,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228703398] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:44:49,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198646203] [2021-12-06 19:44:49,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:44:49,053 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:44:49,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:44:49,053 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:44:49,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-06 19:44:49,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:44:49,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 74 conjunts are in the unsatisfiable core [2021-12-06 19:44:49,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:44:49,247 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 19:44:49,247 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 9 treesize of output 15 [2021-12-06 19:44:50,406 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 57 proven. 34 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 19:44:50,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:44:51,087 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 108 treesize of output 100 [2021-12-06 19:44:51,089 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 100 treesize of output 92 [2021-12-06 19:44:51,092 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 71 treesize of output 67 [2021-12-06 19:44:51,268 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 30 proven. 43 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-06 19:44:51,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198646203] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:44:51,268 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:44:51,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 21, 20] total 44 [2021-12-06 19:44:51,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233579894] [2021-12-06 19:44:51,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:44:51,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-12-06 19:44:51,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:44:51,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-12-06 19:44:51,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1725, Unknown=0, NotChecked=0, Total=1892 [2021-12-06 19:44:51,271 INFO L87 Difference]: Start difference. First operand 488 states and 621 transitions. Second operand has 44 states, 44 states have (on average 3.8863636363636362) internal successors, (171), 42 states have internal predecessors, (171), 17 states have call successors, (25), 3 states have call predecessors, (25), 9 states have return successors, (24), 14 states have call predecessors, (24), 16 states have call successors, (24) [2021-12-06 19:44:54,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:44:54,521 INFO L93 Difference]: Finished difference Result 1601 states and 2313 transitions. [2021-12-06 19:44:54,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-12-06 19:44:54,521 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.8863636363636362) internal successors, (171), 42 states have internal predecessors, (171), 17 states have call successors, (25), 3 states have call predecessors, (25), 9 states have return successors, (24), 14 states have call predecessors, (24), 16 states have call successors, (24) Word has length 113 [2021-12-06 19:44:54,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:44:54,527 INFO L225 Difference]: With dead ends: 1601 [2021-12-06 19:44:54,527 INFO L226 Difference]: Without dead ends: 1211 [2021-12-06 19:44:54,531 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 258 SyntacticMatches, 8 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3086 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1142, Invalid=9570, Unknown=0, NotChecked=0, Total=10712 [2021-12-06 19:44:54,531 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 583 mSDsluCounter, 2463 mSDsCounter, 0 mSdLazyCounter, 2570 mSolverCounterSat, 262 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 583 SdHoareTripleChecker+Valid, 2589 SdHoareTripleChecker+Invalid, 3580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 262 IncrementalHoareTripleChecker+Valid, 2570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 748 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-06 19:44:54,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [583 Valid, 2589 Invalid, 3580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [262 Valid, 2570 Invalid, 0 Unknown, 748 Unchecked, 1.4s Time] [2021-12-06 19:44:54,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1211 states. [2021-12-06 19:44:54,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1211 to 771. [2021-12-06 19:44:54,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 771 states, 617 states have (on average 1.2171799027552674) internal successors, (751), 618 states have internal predecessors, (751), 95 states have call successors, (95), 37 states have call predecessors, (95), 58 states have return successors, (214), 115 states have call predecessors, (214), 93 states have call successors, (214) [2021-12-06 19:44:54,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 771 states to 771 states and 1060 transitions. [2021-12-06 19:44:54,610 INFO L78 Accepts]: Start accepts. Automaton has 771 states and 1060 transitions. Word has length 113 [2021-12-06 19:44:54,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:44:54,610 INFO L470 AbstractCegarLoop]: Abstraction has 771 states and 1060 transitions. [2021-12-06 19:44:54,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.8863636363636362) internal successors, (171), 42 states have internal predecessors, (171), 17 states have call successors, (25), 3 states have call predecessors, (25), 9 states have return successors, (24), 14 states have call predecessors, (24), 16 states have call successors, (24) [2021-12-06 19:44:54,611 INFO L276 IsEmpty]: Start isEmpty. Operand 771 states and 1060 transitions. [2021-12-06 19:44:54,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-06 19:44:54,613 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:44:54,613 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] [2021-12-06 19:44:54,633 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-12-06 19:44:54,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:44:54,813 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:44:54,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:44:54,813 INFO L85 PathProgramCache]: Analyzing trace with hash 1476333347, now seen corresponding path program 1 times [2021-12-06 19:44:54,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:44:54,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782726953] [2021-12-06 19:44:54,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:44:54,814 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:44:54,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:44:54,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 19:44:54,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:44:54,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:44:54,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:44:54,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 19:44:54,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:44:54,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 19:44:54,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:44:54,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-06 19:44:54,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:44:54,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-06 19:44:54,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:44:54,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 19:44:54,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:44:54,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-06 19:44:54,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:44:54,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-06 19:44:54,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:44:54,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 19:44:54,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:44:55,001 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-12-06 19:44:55,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:44:55,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782726953] [2021-12-06 19:44:55,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782726953] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:44:55,002 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:44:55,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-06 19:44:55,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023625308] [2021-12-06 19:44:55,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:44:55,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 19:44:55,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:44:55,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 19:44:55,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-12-06 19:44:55,003 INFO L87 Difference]: Start difference. First operand 771 states and 1060 transitions. Second operand has 10 states, 10 states have (on average 6.1) internal successors, (61), 10 states have internal predecessors, (61), 5 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-12-06 19:44:55,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:44:55,188 INFO L93 Difference]: Finished difference Result 1495 states and 2112 transitions. [2021-12-06 19:44:55,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 19:44:55,188 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.1) internal successors, (61), 10 states have internal predecessors, (61), 5 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 113 [2021-12-06 19:44:55,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:44:55,192 INFO L225 Difference]: With dead ends: 1495 [2021-12-06 19:44:55,192 INFO L226 Difference]: Without dead ends: 783 [2021-12-06 19:44:55,195 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-12-06 19:44:55,195 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 59 mSDsluCounter, 496 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 569 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:44:55,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 569 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 19:44:55,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 783 states. [2021-12-06 19:44:55,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 783 to 713. [2021-12-06 19:44:55,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 713 states, 566 states have (on average 1.185512367491166) internal successors, (671), 571 states have internal predecessors, (671), 91 states have call successors, (91), 36 states have call predecessors, (91), 55 states have return successors, (163), 105 states have call predecessors, (163), 89 states have call successors, (163) [2021-12-06 19:44:55,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 925 transitions. [2021-12-06 19:44:55,264 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 925 transitions. Word has length 113 [2021-12-06 19:44:55,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:44:55,265 INFO L470 AbstractCegarLoop]: Abstraction has 713 states and 925 transitions. [2021-12-06 19:44:55,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.1) internal successors, (61), 10 states have internal predecessors, (61), 5 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-12-06 19:44:55,265 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 925 transitions. [2021-12-06 19:44:55,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-12-06 19:44:55,267 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:44:55,267 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] [2021-12-06 19:44:55,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-06 19:44:55,267 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:44:55,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:44:55,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1112769404, now seen corresponding path program 1 times [2021-12-06 19:44:55,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:44:55,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633818130] [2021-12-06 19:44:55,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:44:55,267 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:44:55,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:44:55,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 19:44:55,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:44:55,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:44:55,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:44:55,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 19:44:55,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:44:55,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 19:44:55,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:44:55,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-06 19:44:55,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:44:55,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-06 19:44:55,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:44:55,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 19:44:55,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:44:55,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-06 19:44:55,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:44:55,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-06 19:44:55,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:44:55,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 19:44:55,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:44:55,418 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-12-06 19:44:55,419 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:44:55,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633818130] [2021-12-06 19:44:55,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633818130] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:44:55,419 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:44:55,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-06 19:44:55,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055693349] [2021-12-06 19:44:55,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:44:55,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 19:44:55,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:44:55,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 19:44:55,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-06 19:44:55,420 INFO L87 Difference]: Start difference. First operand 713 states and 925 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) [2021-12-06 19:44:55,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:44:55,550 INFO L93 Difference]: Finished difference Result 768 states and 991 transitions. [2021-12-06 19:44:55,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 19:44:55,550 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 [2021-12-06 19:44:55,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:44:55,553 INFO L225 Difference]: With dead ends: 768 [2021-12-06 19:44:55,553 INFO L226 Difference]: Without dead ends: 766 [2021-12-06 19:44:55,554 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-12-06 19:44:55,554 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 10 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 562 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:44:55,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 562 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:44:55,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2021-12-06 19:44:55,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 739. [2021-12-06 19:44:55,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 739 states, 582 states have (on average 1.1769759450171822) internal successors, (685), 592 states have internal predecessors, (685), 95 states have call successors, (95), 38 states have call predecessors, (95), 61 states have return successors, (175), 108 states have call predecessors, (175), 93 states have call successors, (175) [2021-12-06 19:44:55,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 739 states to 739 states and 955 transitions. [2021-12-06 19:44:55,625 INFO L78 Accepts]: Start accepts. Automaton has 739 states and 955 transitions. Word has length 116 [2021-12-06 19:44:55,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:44:55,626 INFO L470 AbstractCegarLoop]: Abstraction has 739 states and 955 transitions. [2021-12-06 19:44:55,626 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) [2021-12-06 19:44:55,626 INFO L276 IsEmpty]: Start isEmpty. Operand 739 states and 955 transitions. [2021-12-06 19:44:55,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-12-06 19:44:55,628 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:44:55,628 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] [2021-12-06 19:44:55,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-06 19:44:55,628 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:44:55,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:44:55,628 INFO L85 PathProgramCache]: Analyzing trace with hash 509544598, now seen corresponding path program 1 times [2021-12-06 19:44:55,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:44:55,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560783298] [2021-12-06 19:44:55,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:44:55,629 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:44:55,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:44:55,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 19:44:55,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:44:55,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:44:55,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:44:55,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 19:44:55,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:44:55,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 19:44:55,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:44:55,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 19:44:55,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:44:55,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-06 19:44:55,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:44:55,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-06 19:44:55,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:44:55,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 19:44:55,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:44:55,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 19:44:55,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:44:55,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-06 19:44:55,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:44:55,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-12-06 19:44:55,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:44:55,767 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 3 proven. 30 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-12-06 19:44:55,768 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:44:55,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560783298] [2021-12-06 19:44:55,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560783298] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:44:55,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796771450] [2021-12-06 19:44:55,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:44:55,768 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:44:55,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:44:55,769 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:44:55,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-06 19:44:55,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:44:55,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 49 conjunts are in the unsatisfiable core [2021-12-06 19:44:55,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:44:55,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:44:55,971 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 16 treesize of output 17 [2021-12-06 19:44:55,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:44:55,976 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 [2021-12-06 19:45:18,410 WARN L227 SmtUtils]: Spent 10.02s 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) [2021-12-06 19:45:18,645 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 89 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-06 19:45:18,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:45:19,065 INFO L354 Elim1Store]: treesize reduction 15, result has 64.3 percent of original size [2021-12-06 19:45:19,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 174 treesize of output 160 [2021-12-06 19:45:19,078 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:45:19,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 160 treesize of output 172 [2021-12-06 19:45:19,083 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 126 treesize of output 122 [2021-12-06 19:45:19,093 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 6 treesize of output 4 [2021-12-06 19:45:19,172 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:45:19,172 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 13 treesize of output 17 [2021-12-06 19:45:19,192 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 6 treesize of output 4 [2021-12-06 19:45:19,202 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 6 treesize of output 4 [2021-12-06 19:45:19,431 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:45:19,431 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 104 treesize of output 102 [2021-12-06 19:45:19,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:45:19,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:45:19,553 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:45:19,553 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2021-12-06 19:45:19,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-12-06 19:45:19,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 19:45:19,560 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-06 19:45:19,634 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 4 proven. 46 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-12-06 19:45:19,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796771450] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:45:19,634 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:45:19,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 10] total 26 [2021-12-06 19:45:19,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225337748] [2021-12-06 19:45:19,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:45:19,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-06 19:45:19,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:45:19,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-06 19:45:19,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=564, Unknown=6, NotChecked=0, Total=650 [2021-12-06 19:45:19,636 INFO L87 Difference]: Start difference. First operand 739 states and 955 transitions. Second operand has 26 states, 25 states have (on average 6.04) internal successors, (151), 25 states have internal predecessors, (151), 12 states have call successors, (26), 4 states have call predecessors, (26), 8 states have return successors, (25), 10 states have call predecessors, (25), 12 states have call successors, (25) [2021-12-06 19:45:26,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:45:26,515 INFO L93 Difference]: Finished difference Result 1117 states and 1488 transitions. [2021-12-06 19:45:26,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-06 19:45:26,516 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 6.04) internal successors, (151), 25 states have internal predecessors, (151), 12 states have call successors, (26), 4 states have call predecessors, (26), 8 states have return successors, (25), 10 states have call predecessors, (25), 12 states have call successors, (25) Word has length 120 [2021-12-06 19:45:26,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:45:26,519 INFO L225 Difference]: With dead ends: 1117 [2021-12-06 19:45:26,519 INFO L226 Difference]: Without dead ends: 806 [2021-12-06 19:45:26,521 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 253 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 29.0s TimeCoverageRelationStatistics Valid=319, Invalid=1928, Unknown=9, NotChecked=0, Total=2256 [2021-12-06 19:45:26,521 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 116 mSDsluCounter, 956 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 1029 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 19:45:26,521 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 1029 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 385 Invalid, 0 Unknown, 101 Unchecked, 0.3s Time] [2021-12-06 19:45:26,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 806 states. [2021-12-06 19:45:26,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 806 to 715. [2021-12-06 19:45:26,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 715 states, 563 states have (on average 1.1705150976909413) internal successors, (659), 575 states have internal predecessors, (659), 92 states have call successors, (92), 36 states have call predecessors, (92), 59 states have return successors, (168), 103 states have call predecessors, (168), 90 states have call successors, (168) [2021-12-06 19:45:26,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 715 states to 715 states and 919 transitions. [2021-12-06 19:45:26,594 INFO L78 Accepts]: Start accepts. Automaton has 715 states and 919 transitions. Word has length 120 [2021-12-06 19:45:26,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:45:26,594 INFO L470 AbstractCegarLoop]: Abstraction has 715 states and 919 transitions. [2021-12-06 19:45:26,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 6.04) internal successors, (151), 25 states have internal predecessors, (151), 12 states have call successors, (26), 4 states have call predecessors, (26), 8 states have return successors, (25), 10 states have call predecessors, (25), 12 states have call successors, (25) [2021-12-06 19:45:26,594 INFO L276 IsEmpty]: Start isEmpty. Operand 715 states and 919 transitions. [2021-12-06 19:45:26,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-06 19:45:26,596 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:45:26,596 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 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] [2021-12-06 19:45:26,631 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-12-06 19:45:26,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-12-06 19:45:26,797 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:45:26,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:45:26,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1350319447, now seen corresponding path program 1 times [2021-12-06 19:45:26,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:45:26,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108890752] [2021-12-06 19:45:26,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:45:26,797 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:45:26,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:45:26,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 19:45:26,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:45:26,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:45:26,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:45:26,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 19:45:26,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:45:26,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 19:45:26,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:45:26,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-06 19:45:26,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:45:26,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-06 19:45:26,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:45:26,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 19:45:26,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:45:26,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 19:45:26,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:45:26,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-06 19:45:26,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:45:26,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-06 19:45:26,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:45:26,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 19:45:26,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:45:26,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 19:45:26,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:45:26,962 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 24 proven. 21 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-12-06 19:45:26,963 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:45:26,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108890752] [2021-12-06 19:45:26,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108890752] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:45:26,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716624420] [2021-12-06 19:45:26,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:45:26,963 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:45:26,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:45:26,964 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:45:26,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-06 19:45:27,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:45:27,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 586 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-06 19:45:27,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:45:27,214 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 117 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-12-06 19:45:27,214 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:45:27,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716624420] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:45:27,214 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:45:27,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2021-12-06 19:45:27,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996546296] [2021-12-06 19:45:27,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:45:27,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 19:45:27,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:45:27,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 19:45:27,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-12-06 19:45:27,215 INFO L87 Difference]: Start difference. First operand 715 states and 919 transitions. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-06 19:45:27,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:45:27,265 INFO L93 Difference]: Finished difference Result 1109 states and 1443 transitions. [2021-12-06 19:45:27,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 19:45:27,266 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 134 [2021-12-06 19:45:27,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:45:27,268 INFO L225 Difference]: With dead ends: 1109 [2021-12-06 19:45:27,268 INFO L226 Difference]: Without dead ends: 489 [2021-12-06 19:45:27,270 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-12-06 19:45:27,270 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 0 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:45:27,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 310 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:45:27,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-12-06 19:45:27,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 469. [2021-12-06 19:45:27,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 371 states have (on average 1.1078167115902966) internal successors, (411), 380 states have internal predecessors, (411), 56 states have call successors, (56), 31 states have call predecessors, (56), 41 states have return successors, (78), 57 states have call predecessors, (78), 54 states have call successors, (78) [2021-12-06 19:45:27,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 545 transitions. [2021-12-06 19:45:27,311 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 545 transitions. Word has length 134 [2021-12-06 19:45:27,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:45:27,312 INFO L470 AbstractCegarLoop]: Abstraction has 469 states and 545 transitions. [2021-12-06 19:45:27,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-06 19:45:27,312 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 545 transitions. [2021-12-06 19:45:27,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-12-06 19:45:27,314 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:45:27,314 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, 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] [2021-12-06 19:45:27,334 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-12-06 19:45:27,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:45:27,515 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:45:27,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:45:27,516 INFO L85 PathProgramCache]: Analyzing trace with hash 610448605, now seen corresponding path program 1 times [2021-12-06 19:45:27,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:45:27,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732422542] [2021-12-06 19:45:27,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:45:27,517 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:45:27,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:45:27,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 19:45:27,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:45:27,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:45:27,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:45:27,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 19:45:27,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:45:27,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 19:45:27,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:45:27,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-06 19:45:27,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:45:27,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-06 19:45:27,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:45:27,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 19:45:27,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:45:27,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-06 19:45:27,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:45:27,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-06 19:45:27,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:45:27,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 19:45:27,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:45:27,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-12-06 19:45:27,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:45:27,684 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-12-06 19:45:27,685 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:45:27,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732422542] [2021-12-06 19:45:27,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732422542] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:45:27,685 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:45:27,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 19:45:27,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407627871] [2021-12-06 19:45:27,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:45:27,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 19:45:27,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:45:27,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 19:45:27,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:45:27,686 INFO L87 Difference]: Start difference. First operand 469 states and 545 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-06 19:45:27,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:45:27,742 INFO L93 Difference]: Finished difference Result 479 states and 554 transitions. [2021-12-06 19:45:27,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 19:45:27,743 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 122 [2021-12-06 19:45:27,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:45:27,744 INFO L225 Difference]: With dead ends: 479 [2021-12-06 19:45:27,745 INFO L226 Difference]: Without dead ends: 477 [2021-12-06 19:45:27,745 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 19:45:27,745 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 7 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:45:27,745 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 290 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:45:27,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2021-12-06 19:45:27,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 477. [2021-12-06 19:45:27,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 377 states have (on average 1.106100795755968) internal successors, (417), 386 states have internal predecessors, (417), 56 states have call successors, (56), 33 states have call predecessors, (56), 43 states have return successors, (78), 57 states have call predecessors, (78), 54 states have call successors, (78) [2021-12-06 19:45:27,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 551 transitions. [2021-12-06 19:45:27,789 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 551 transitions. Word has length 122 [2021-12-06 19:45:27,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:45:27,789 INFO L470 AbstractCegarLoop]: Abstraction has 477 states and 551 transitions. [2021-12-06 19:45:27,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-06 19:45:27,789 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 551 transitions. [2021-12-06 19:45:27,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-06 19:45:27,791 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:45:27,791 INFO L514 BasicCegarLoop]: trace histogram [7, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 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] [2021-12-06 19:45:27,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-06 19:45:27,791 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:45:27,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:45:27,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1446727131, now seen corresponding path program 2 times [2021-12-06 19:45:27,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:45:27,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604234839] [2021-12-06 19:45:27,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:45:27,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:45:27,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:45:27,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 19:45:27,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:45:27,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:45:27,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:45:27,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 19:45:27,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:45:27,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 19:45:27,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:45:27,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-06 19:45:27,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:45:27,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-06 19:45:27,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:45:27,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 19:45:27,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:45:27,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 19:45:27,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:45:27,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-06 19:45:27,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:45:27,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-06 19:45:27,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:45:28,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 19:45:28,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:45:28,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 19:45:28,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:45:28,094 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 77 proven. 35 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-12-06 19:45:28,094 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:45:28,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604234839] [2021-12-06 19:45:28,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604234839] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:45:28,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050796049] [2021-12-06 19:45:28,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 19:45:28,094 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:45:28,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:45:28,095 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:45:28,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-06 19:45:28,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 19:45:28,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:45:28,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 598 conjuncts, 82 conjunts are in the unsatisfiable core [2021-12-06 19:45:28,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:45:28,298 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 19:45:28,299 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 19:45:28,307 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 19:45:28,308 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 19:45:29,436 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 120 proven. 35 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-12-06 19:45:29,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:45:30,639 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:45:30,639 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 2181 treesize of output 1908 [2021-12-06 19:45:30,674 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:45:30,675 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 1850 treesize of output 1654 [2021-12-06 19:45:30,700 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:45:30,700 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 1640 treesize of output 1548 [2021-12-06 19:45:30,729 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 605 treesize of output 565 [2021-12-06 19:45:30,752 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 565 treesize of output 545 [2021-12-06 19:45:30,775 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 545 treesize of output 505 [2021-12-06 19:45:38,882 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 78 proven. 43 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-12-06 19:45:38,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050796049] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:45:38,883 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:45:38,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22, 21] total 48 [2021-12-06 19:45:38,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568073044] [2021-12-06 19:45:38,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:45:38,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-12-06 19:45:38,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:45:38,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-12-06 19:45:38,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=2069, Unknown=0, NotChecked=0, Total=2256 [2021-12-06 19:45:38,884 INFO L87 Difference]: Start difference. First operand 477 states and 551 transitions. Second operand has 48 states, 45 states have (on average 3.6) internal successors, (162), 48 states have internal predecessors, (162), 21 states have call successors, (29), 3 states have call predecessors, (29), 9 states have return successors, (28), 17 states have call predecessors, (28), 20 states have call successors, (28) [2021-12-06 19:45:40,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:45:40,710 INFO L93 Difference]: Finished difference Result 1072 states and 1411 transitions. [2021-12-06 19:45:40,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-06 19:45:40,710 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 45 states have (on average 3.6) internal successors, (162), 48 states have internal predecessors, (162), 21 states have call successors, (29), 3 states have call predecessors, (29), 9 states have return successors, (28), 17 states have call predecessors, (28), 20 states have call successors, (28) Word has length 135 [2021-12-06 19:45:40,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:45:40,714 INFO L225 Difference]: With dead ends: 1072 [2021-12-06 19:45:40,714 INFO L226 Difference]: Without dead ends: 930 [2021-12-06 19:45:40,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 280 SyntacticMatches, 4 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1252 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=484, Invalid=4918, Unknown=0, NotChecked=0, Total=5402 [2021-12-06 19:45:40,717 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 223 mSDsluCounter, 2562 mSDsCounter, 0 mSdLazyCounter, 1382 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 2690 SdHoareTripleChecker+Invalid, 2168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 1382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 650 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-06 19:45:40,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 2690 Invalid, 2168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 1382 Invalid, 0 Unknown, 650 Unchecked, 0.9s Time] [2021-12-06 19:45:40,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2021-12-06 19:45:40,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 608. [2021-12-06 19:45:40,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 608 states, 480 states have (on average 1.1104166666666666) internal successors, (533), 495 states have internal predecessors, (533), 70 states have call successors, (70), 41 states have call predecessors, (70), 57 states have return successors, (107), 71 states have call predecessors, (107), 68 states have call successors, (107) [2021-12-06 19:45:40,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 710 transitions. [2021-12-06 19:45:40,777 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 710 transitions. Word has length 135 [2021-12-06 19:45:40,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:45:40,778 INFO L470 AbstractCegarLoop]: Abstraction has 608 states and 710 transitions. [2021-12-06 19:45:40,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 45 states have (on average 3.6) internal successors, (162), 48 states have internal predecessors, (162), 21 states have call successors, (29), 3 states have call predecessors, (29), 9 states have return successors, (28), 17 states have call predecessors, (28), 20 states have call successors, (28) [2021-12-06 19:45:40,778 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 710 transitions. [2021-12-06 19:45:40,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-12-06 19:45:40,779 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:45:40,779 INFO L514 BasicCegarLoop]: trace histogram [6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:45:40,810 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-12-06 19:45:40,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-12-06 19:45:40,980 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:45:40,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:45:40,981 INFO L85 PathProgramCache]: Analyzing trace with hash 409153948, now seen corresponding path program 2 times [2021-12-06 19:45:40,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:45:40,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805610618] [2021-12-06 19:45:40,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:45:40,982 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:45:41,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:45:41,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 19:45:41,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:45:41,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:45:41,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:45:41,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 19:45:41,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:45:41,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 19:45:41,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:45:41,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 19:45:41,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:45:41,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-06 19:45:41,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:45:41,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-06 19:45:41,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:45:41,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 19:45:41,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:45:41,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 19:45:41,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:45:41,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-06 19:45:41,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:45:41,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-12-06 19:45:41,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:45:41,221 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-12-06 19:45:41,221 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:45:41,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805610618] [2021-12-06 19:45:41,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805610618] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:45:41,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878562977] [2021-12-06 19:45:41,221 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 19:45:41,222 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:45:41,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:45:41,222 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:45:41,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-06 19:45:41,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 19:45:41,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:45:41,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 50 conjunts are in the unsatisfiable core [2021-12-06 19:45:41,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:45:41,404 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 19:45:41,405 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 9 treesize of output 15 [2021-12-06 19:45:41,412 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 19:45:41,413 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 9 treesize of output 15 [2021-12-06 19:45:42,922 WARN L860 $PredicateComparison]: unable to prove that (or (exists ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_34| Int) (|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_34| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_34|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_34|) 0))) (exists ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_34| Int) (|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_34| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_34|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_34|) 0)))) is different from true [2021-12-06 19:45:44,348 WARN L860 $PredicateComparison]: unable to prove that (or (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_35| Int) (|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_35| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_35|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_35|) 0))) (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_35| Int) (|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_35| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_35|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_35|) 0)))) is different from true [2021-12-06 19:45:45,254 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 21 proven. 48 refuted. 0 times theorem prover too weak. 28 trivial. 35 not checked. [2021-12-06 19:45:45,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:45:45,653 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 10 proven. 49 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-12-06 19:45:45,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878562977] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:45:45,653 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:45:45,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18, 12] total 30 [2021-12-06 19:45:45,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120023501] [2021-12-06 19:45:45,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:45:45,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-06 19:45:45,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:45:45,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-06 19:45:45,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=668, Unknown=2, NotChecked=106, Total=870 [2021-12-06 19:45:45,654 INFO L87 Difference]: Start difference. First operand 608 states and 710 transitions. Second operand has 30 states, 30 states have (on average 4.866666666666666) internal successors, (146), 28 states have internal predecessors, (146), 11 states have call successors, (21), 5 states have call predecessors, (21), 7 states have return successors, (20), 10 states have call predecessors, (20), 10 states have call successors, (20) [2021-12-06 19:45:47,296 WARN L860 $PredicateComparison]: unable to prove that (and (or (exists ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_34| Int) (|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_34| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_34|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_34|) 0))) (exists ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_34| Int) (|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_34| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_34|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_34|) 0)))) (or (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_35| Int) (|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_35| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_35|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_35|) 0))) (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_35| Int) (|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_35| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_35|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_35|) 0))))) is different from true [2021-12-06 19:45:47,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:45:47,901 INFO L93 Difference]: Finished difference Result 745 states and 884 transitions. [2021-12-06 19:45:47,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-06 19:45:47,902 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.866666666666666) internal successors, (146), 28 states have internal predecessors, (146), 11 states have call successors, (21), 5 states have call predecessors, (21), 7 states have return successors, (20), 10 states have call predecessors, (20), 10 states have call successors, (20) Word has length 122 [2021-12-06 19:45:47,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:45:47,904 INFO L225 Difference]: With dead ends: 745 [2021-12-06 19:45:47,904 INFO L226 Difference]: Without dead ends: 652 [2021-12-06 19:45:47,905 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 251 SyntacticMatches, 11 SemanticMatches, 47 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=303, Invalid=1776, Unknown=3, NotChecked=270, Total=2352 [2021-12-06 19:45:47,905 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 161 mSDsluCounter, 1066 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 1146 SdHoareTripleChecker+Invalid, 914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 500 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 19:45:47,905 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 1146 Invalid, 914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 392 Invalid, 0 Unknown, 500 Unchecked, 0.2s Time] [2021-12-06 19:45:47,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2021-12-06 19:45:47,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 598. [2021-12-06 19:45:47,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 598 states, 470 states have (on average 1.1085106382978724) internal successors, (521), 485 states have internal predecessors, (521), 70 states have call successors, (70), 41 states have call predecessors, (70), 57 states have return successors, (107), 71 states have call predecessors, (107), 68 states have call successors, (107) [2021-12-06 19:45:47,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 698 transitions. [2021-12-06 19:45:47,967 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 698 transitions. Word has length 122 [2021-12-06 19:45:47,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:45:47,967 INFO L470 AbstractCegarLoop]: Abstraction has 598 states and 698 transitions. [2021-12-06 19:45:47,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.866666666666666) internal successors, (146), 28 states have internal predecessors, (146), 11 states have call successors, (21), 5 states have call predecessors, (21), 7 states have return successors, (20), 10 states have call predecessors, (20), 10 states have call successors, (20) [2021-12-06 19:45:47,968 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 698 transitions. [2021-12-06 19:45:47,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-12-06 19:45:47,969 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:45:47,969 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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] [2021-12-06 19:45:47,989 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-12-06 19:45:48,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-12-06 19:45:48,170 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:45:48,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:45:48,171 INFO L85 PathProgramCache]: Analyzing trace with hash 594113950, now seen corresponding path program 2 times [2021-12-06 19:45:48,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:45:48,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139254797] [2021-12-06 19:45:48,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:45:48,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:45:48,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:45:48,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 19:45:48,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:45:48,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:45:48,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:45:48,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 19:45:48,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:45:48,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 19:45:48,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:45:48,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-06 19:45:48,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:45:48,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-06 19:45:48,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:45:48,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 19:45:48,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:45:48,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-06 19:45:48,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:45:48,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-06 19:45:48,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:45:48,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 19:45:48,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:45:48,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 19:45:48,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:45:48,683 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 42 proven. 46 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-12-06 19:45:48,683 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:45:48,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139254797] [2021-12-06 19:45:48,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139254797] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:45:48,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617983098] [2021-12-06 19:45:48,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 19:45:48,683 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:45:48,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:45:48,684 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:45:48,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-06 19:45:48,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 19:45:48,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:45:48,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 567 conjuncts, 81 conjunts are in the unsatisfiable core [2021-12-06 19:45:48,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:45:48,884 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 19:45:48,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 19:45:48,893 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 19:45:48,893 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 9 treesize of output 15 [2021-12-06 19:46:11,762 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) [2021-12-06 19:46:11,990 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 107 proven. 15 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-06 19:46:11,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:46:12,832 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 49 proven. 28 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-12-06 19:46:12,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617983098] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:46:12,832 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:46:12,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 13] total 46 [2021-12-06 19:46:12,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809703380] [2021-12-06 19:46:12,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:46:12,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-06 19:46:12,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:46:12,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-06 19:46:12,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1891, Unknown=6, NotChecked=0, Total=2070 [2021-12-06 19:46:12,833 INFO L87 Difference]: Start difference. First operand 598 states and 698 transitions. Second operand has 46 states, 44 states have (on average 3.772727272727273) internal successors, (166), 45 states have internal predecessors, (166), 20 states have call successors, (32), 4 states have call predecessors, (32), 9 states have return successors, (31), 18 states have call predecessors, (31), 19 states have call successors, (31) [2021-12-06 19:46:56,138 WARN L227 SmtUtils]: Spent 10.03s on a formula simplification that was a NOOP. DAG size: 34 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 19:47:22,263 WARN L227 SmtUtils]: Spent 20.06s on a formula simplification. DAG size of input: 47 DAG size of output: 45 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 19:47:46,421 WARN L227 SmtUtils]: Spent 20.09s on a formula simplification. DAG size of input: 50 DAG size of output: 48 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 19:48:08,555 WARN L227 SmtUtils]: Spent 20.06s on a formula simplification. DAG size of input: 59 DAG size of output: 43 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 19:48:10,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:48:10,263 INFO L93 Difference]: Finished difference Result 969 states and 1181 transitions. [2021-12-06 19:48:10,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-12-06 19:48:10,263 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 44 states have (on average 3.772727272727273) internal successors, (166), 45 states have internal predecessors, (166), 20 states have call successors, (32), 4 states have call predecessors, (32), 9 states have return successors, (31), 18 states have call predecessors, (31), 19 states have call successors, (31) Word has length 124 [2021-12-06 19:48:10,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:48:10,266 INFO L225 Difference]: With dead ends: 969 [2021-12-06 19:48:10,266 INFO L226 Difference]: Without dead ends: 664 [2021-12-06 19:48:10,267 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 263 SyntacticMatches, 6 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2195 ImplicationChecksByTransitivity, 138.4s TimeCoverageRelationStatistics Valid=818, Invalid=8276, Unknown=26, NotChecked=0, Total=9120 [2021-12-06 19:48:10,268 INFO L933 BasicCegarLoop]: 122 mSDtfsCounter, 341 mSDsluCounter, 2252 mSDsCounter, 0 mSdLazyCounter, 3371 mSolverCounterSat, 269 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 2374 SdHoareTripleChecker+Invalid, 4307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 269 IncrementalHoareTripleChecker+Valid, 3371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 667 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-06 19:48:10,268 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [345 Valid, 2374 Invalid, 4307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [269 Valid, 3371 Invalid, 0 Unknown, 667 Unchecked, 2.2s Time] [2021-12-06 19:48:10,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2021-12-06 19:48:10,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 542. [2021-12-06 19:48:10,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 430 states have (on average 1.0906976744186045) internal successors, (469), 441 states have internal predecessors, (469), 60 states have call successors, (60), 41 states have call predecessors, (60), 51 states have return successors, (83), 59 states have call predecessors, (83), 58 states have call successors, (83) [2021-12-06 19:48:10,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 612 transitions. [2021-12-06 19:48:10,318 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 612 transitions. Word has length 124 [2021-12-06 19:48:10,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:48:10,318 INFO L470 AbstractCegarLoop]: Abstraction has 542 states and 612 transitions. [2021-12-06 19:48:10,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 44 states have (on average 3.772727272727273) internal successors, (166), 45 states have internal predecessors, (166), 20 states have call successors, (32), 4 states have call predecessors, (32), 9 states have return successors, (31), 18 states have call predecessors, (31), 19 states have call successors, (31) [2021-12-06 19:48:10,319 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 612 transitions. [2021-12-06 19:48:10,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-12-06 19:48:10,320 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:48:10,320 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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] [2021-12-06 19:48:10,340 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-12-06 19:48:10,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-12-06 19:48:10,521 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:48:10,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:48:10,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1250754886, now seen corresponding path program 3 times [2021-12-06 19:48:10,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:48:10,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838719220] [2021-12-06 19:48:10,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:48:10,523 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:48:10,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:48:10,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 19:48:10,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:48:10,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:48:10,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:48:10,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 19:48:10,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:48:10,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 19:48:10,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:48:10,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 19:48:10,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:48:10,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-06 19:48:10,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:48:10,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-06 19:48:10,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:48:10,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 19:48:10,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:48:10,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-06 19:48:10,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:48:10,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-06 19:48:10,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:48:10,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 19:48:10,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:48:10,793 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 69 proven. 11 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-12-06 19:48:10,793 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:48:10,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838719220] [2021-12-06 19:48:10,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838719220] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:48:10,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39373228] [2021-12-06 19:48:10,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 19:48:10,793 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:48:10,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:48:10,794 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:48:10,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-06 19:48:10,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2021-12-06 19:48:10,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:48:10,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-06 19:48:10,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:48:12,519 WARN L860 $PredicateComparison]: unable to prove that (or (exists ((|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_BEFORE_CALL_34| Int) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_BEFORE_CALL_36| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_BEFORE_CALL_36|) |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_BEFORE_CALL_34|) 0))) (exists ((|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_BEFORE_CALL_34| Int) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_BEFORE_CALL_36| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_BEFORE_CALL_36|) |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_BEFORE_CALL_34|) 0)))) is different from true [2021-12-06 19:48:30,283 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-12-06 19:48:30,283 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:48:30,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39373228] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:48:30,283 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:48:30,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [16] total 26 [2021-12-06 19:48:30,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134689694] [2021-12-06 19:48:30,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:48:30,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-06 19:48:30,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:48:30,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-06 19:48:30,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=539, Unknown=2, NotChecked=46, Total=650 [2021-12-06 19:48:30,285 INFO L87 Difference]: Start difference. First operand 542 states and 612 transitions. Second operand has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 12 states have internal predecessors, (61), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-06 19:48:30,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:48:30,530 INFO L93 Difference]: Finished difference Result 676 states and 769 transitions. [2021-12-06 19:48:30,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 19:48:30,531 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 12 states have internal predecessors, (61), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 124 [2021-12-06 19:48:30,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:48:30,534 INFO L225 Difference]: With dead ends: 676 [2021-12-06 19:48:30,534 INFO L226 Difference]: Without dead ends: 561 [2021-12-06 19:48:30,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 19.3s TimeCoverageRelationStatistics Valid=89, Invalid=725, Unknown=2, NotChecked=54, Total=870 [2021-12-06 19:48:30,536 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 69 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 211 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:48:30,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 520 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 123 Invalid, 0 Unknown, 211 Unchecked, 0.1s Time] [2021-12-06 19:48:30,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2021-12-06 19:48:30,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 527. [2021-12-06 19:48:30,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 527 states, 417 states have (on average 1.0815347721822541) internal successors, (451), 427 states have internal predecessors, (451), 60 states have call successors, (60), 41 states have call predecessors, (60), 49 states have return successors, (78), 58 states have call predecessors, (78), 58 states have call successors, (78) [2021-12-06 19:48:30,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 589 transitions. [2021-12-06 19:48:30,601 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 589 transitions. Word has length 124 [2021-12-06 19:48:30,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:48:30,601 INFO L470 AbstractCegarLoop]: Abstraction has 527 states and 589 transitions. [2021-12-06 19:48:30,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 12 states have internal predecessors, (61), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-06 19:48:30,601 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 589 transitions. [2021-12-06 19:48:30,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-12-06 19:48:30,602 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:48:30,602 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, 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] [2021-12-06 19:48:30,622 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-12-06 19:48:30,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:48:30,803 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:48:30,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:48:30,803 INFO L85 PathProgramCache]: Analyzing trace with hash -993241429, now seen corresponding path program 1 times [2021-12-06 19:48:30,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:48:30,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27271079] [2021-12-06 19:48:30,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:48:30,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:48:30,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:48:30,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 19:48:30,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:48:30,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:48:30,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:48:30,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 19:48:30,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:48:30,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 19:48:30,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:48:30,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-06 19:48:30,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:48:30,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-06 19:48:30,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:48:30,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 19:48:30,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:48:30,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-06 19:48:30,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:48:30,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-06 19:48:30,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:48:30,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 19:48:30,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:48:30,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-12-06 19:48:31,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:48:31,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-12-06 19:48:31,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:48:31,008 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2021-12-06 19:48:31,008 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:48:31,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27271079] [2021-12-06 19:48:31,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27271079] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:48:31,008 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:48:31,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-06 19:48:31,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146429207] [2021-12-06 19:48:31,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:48:31,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 19:48:31,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:48:31,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 19:48:31,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-12-06 19:48:31,009 INFO L87 Difference]: Start difference. First operand 527 states and 589 transitions. Second operand has 10 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 5 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-06 19:48:31,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:48:31,175 INFO L93 Difference]: Finished difference Result 537 states and 598 transitions. [2021-12-06 19:48:31,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 19:48:31,175 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 5 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 129 [2021-12-06 19:48:31,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:48:31,177 INFO L225 Difference]: With dead ends: 537 [2021-12-06 19:48:31,177 INFO L226 Difference]: Without dead ends: 533 [2021-12-06 19:48:31,178 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-12-06 19:48:31,178 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 16 mSDsluCounter, 448 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 521 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:48:31,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 521 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 19:48:31,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2021-12-06 19:48:31,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 533. [2021-12-06 19:48:31,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 533 states, 422 states have (on average 1.0781990521327014) internal successors, (455), 431 states have internal predecessors, (455), 60 states have call successors, (60), 43 states have call predecessors, (60), 50 states have return successors, (78), 58 states have call predecessors, (78), 58 states have call successors, (78) [2021-12-06 19:48:31,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 593 transitions. [2021-12-06 19:48:31,226 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 593 transitions. Word has length 129 [2021-12-06 19:48:31,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:48:31,226 INFO L470 AbstractCegarLoop]: Abstraction has 533 states and 593 transitions. [2021-12-06 19:48:31,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 5 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-06 19:48:31,227 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 593 transitions. [2021-12-06 19:48:31,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-06 19:48:31,228 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:48:31,228 INFO L514 BasicCegarLoop]: trace histogram [9, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 3, 3, 3, 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] [2021-12-06 19:48:31,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-12-06 19:48:31,228 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:48:31,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:48:31,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1408756293, now seen corresponding path program 4 times [2021-12-06 19:48:31,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:48:31,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777369459] [2021-12-06 19:48:31,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:48:31,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:48:31,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:48:31,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 19:48:31,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:48:31,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:48:31,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:48:31,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 19:48:31,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:48:31,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 19:48:31,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:48:31,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 19:48:31,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:48:31,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-06 19:48:31,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:48:31,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-06 19:48:31,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:48:31,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 19:48:31,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:48:31,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 19:48:31,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:48:31,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-06 19:48:31,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:48:31,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-06 19:48:31,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:48:31,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-06 19:48:31,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:48:31,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 19:48:31,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:48:31,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 19:48:31,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:48:31,554 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 76 proven. 84 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-12-06 19:48:31,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:48:31,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777369459] [2021-12-06 19:48:31,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777369459] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:48:31,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584759383] [2021-12-06 19:48:31,555 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 19:48:31,555 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:48:31,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:48:31,556 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:48:31,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-06 19:48:31,713 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 19:48:31,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:48:31,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 678 conjuncts, 99 conjunts are in the unsatisfiable core [2021-12-06 19:48:31,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:48:31,766 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 19:48:31,766 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 9 treesize of output 15 [2021-12-06 19:48:31,774 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 19:48:31,774 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 9 treesize of output 15 [2021-12-06 19:48:32,854 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 139 proven. 101 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-12-06 19:48:32,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:48:34,131 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 281 treesize of output 273 [2021-12-06 19:48:34,700 INFO L354 Elim1Store]: treesize reduction 294, result has 51.8 percent of original size [2021-12-06 19:48:34,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 11 new quantified variables, introduced 45 case distinctions, treesize of input 7053 treesize of output 6516 [2021-12-06 19:48:34,826 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 6306 treesize of output 5904 [2021-12-06 19:48:34,940 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:48:34,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 5920 treesize of output 5320 [2021-12-06 19:48:35,132 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:48:35,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 5304 treesize of output 5132 [2021-12-06 19:48:35,290 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 5072 treesize of output 4862 [2021-12-06 19:48:54,190 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 77 proven. 92 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-12-06 19:48:54,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584759383] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:48:54,191 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:48:54,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 23, 21] total 55 [2021-12-06 19:48:54,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62747467] [2021-12-06 19:48:54,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:48:54,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-12-06 19:48:54,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:48:54,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-12-06 19:48:54,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=2776, Unknown=0, NotChecked=0, Total=2970 [2021-12-06 19:48:54,192 INFO L87 Difference]: Start difference. First operand 533 states and 593 transitions. Second operand has 55 states, 55 states have (on average 3.672727272727273) internal successors, (202), 52 states have internal predecessors, (202), 26 states have call successors, (36), 3 states have call predecessors, (36), 11 states have return successors, (35), 24 states have call predecessors, (35), 25 states have call successors, (35) [2021-12-06 19:48:56,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:48:56,202 INFO L93 Difference]: Finished difference Result 944 states and 1120 transitions. [2021-12-06 19:48:56,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-06 19:48:56,202 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 3.672727272727273) internal successors, (202), 52 states have internal predecessors, (202), 26 states have call successors, (36), 3 states have call predecessors, (36), 11 states have return successors, (35), 24 states have call predecessors, (35), 25 states have call successors, (35) Word has length 157 [2021-12-06 19:48:56,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:48:56,206 INFO L225 Difference]: With dead ends: 944 [2021-12-06 19:48:56,206 INFO L226 Difference]: Without dead ends: 857 [2021-12-06 19:48:56,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 406 GetRequests, 312 SyntacticMatches, 12 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1612 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=566, Invalid=6406, Unknown=0, NotChecked=0, Total=6972 [2021-12-06 19:48:56,207 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 366 mSDsluCounter, 2486 mSDsCounter, 0 mSdLazyCounter, 1212 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 2594 SdHoareTripleChecker+Invalid, 1789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 1212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 470 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 19:48:56,207 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [366 Valid, 2594 Invalid, 1789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 1212 Invalid, 0 Unknown, 470 Unchecked, 0.7s Time] [2021-12-06 19:48:56,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 857 states. [2021-12-06 19:48:56,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 857 to 732. [2021-12-06 19:48:56,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 732 states, 575 states have (on average 1.0834782608695652) internal successors, (623), 592 states have internal predecessors, (623), 85 states have call successors, (85), 55 states have call predecessors, (85), 71 states have return successors, (122), 84 states have call predecessors, (122), 83 states have call successors, (122) [2021-12-06 19:48:56,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 732 states to 732 states and 830 transitions. [2021-12-06 19:48:56,282 INFO L78 Accepts]: Start accepts. Automaton has 732 states and 830 transitions. Word has length 157 [2021-12-06 19:48:56,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:48:56,282 INFO L470 AbstractCegarLoop]: Abstraction has 732 states and 830 transitions. [2021-12-06 19:48:56,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 3.672727272727273) internal successors, (202), 52 states have internal predecessors, (202), 26 states have call successors, (36), 3 states have call predecessors, (36), 11 states have return successors, (35), 24 states have call predecessors, (35), 25 states have call successors, (35) [2021-12-06 19:48:56,282 INFO L276 IsEmpty]: Start isEmpty. Operand 732 states and 830 transitions. [2021-12-06 19:48:56,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-06 19:48:56,283 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:48:56,284 INFO L514 BasicCegarLoop]: trace histogram [9, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 3, 3, 3, 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] [2021-12-06 19:48:56,304 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-12-06 19:48:56,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:48:56,484 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:48:56,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:48:56,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1666921731, now seen corresponding path program 3 times [2021-12-06 19:48:56,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:48:56,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133270730] [2021-12-06 19:48:56,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:48:56,487 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:48:56,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:48:56,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 19:48:56,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:48:56,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:48:56,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:48:56,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 19:48:56,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:48:56,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 19:48:56,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:48:56,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 19:48:56,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:48:56,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-06 19:48:56,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:48:56,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-06 19:48:56,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:48:56,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 19:48:56,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:48:56,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 19:48:56,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:48:56,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-06 19:48:56,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:48:56,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-06 19:48:56,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:48:56,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-06 19:48:56,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:48:56,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 19:48:56,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:48:56,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 19:48:56,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:48:56,743 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 0 proven. 89 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2021-12-06 19:48:56,743 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:48:56,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133270730] [2021-12-06 19:48:56,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133270730] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:48:56,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503416024] [2021-12-06 19:48:56,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 19:48:56,743 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:48:56,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:48:56,744 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:48:56,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-12-06 19:48:56,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-06 19:48:56,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:48:56,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 96 conjunts are in the unsatisfiable core [2021-12-06 19:48:56,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:48:57,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:48:57,007 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 [2021-12-06 19:48:57,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:48:57,011 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 16 treesize of output 17 [2021-12-06 19:49:30,414 WARN L227 SmtUtils]: Spent 8.04s on a formula simplification that was a NOOP. DAG size: 33 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 19:49:40,607 WARN L227 SmtUtils]: Spent 8.06s on a formula simplification that was a NOOP. DAG size: 38 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 19:49:40,922 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 154 proven. 10 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2021-12-06 19:49:40,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:49:41,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503416024] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:49:41,321 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:49:41,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 21] total 30 [2021-12-06 19:49:41,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901313146] [2021-12-06 19:49:41,321 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:49:41,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-06 19:49:41,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:49:41,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-06 19:49:41,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=820, Unknown=13, NotChecked=0, Total=930 [2021-12-06 19:49:41,322 INFO L87 Difference]: Start difference. First operand 732 states and 830 transitions. Second operand has 30 states, 29 states have (on average 4.655172413793103) internal successors, (135), 28 states have internal predecessors, (135), 12 states have call successors, (21), 4 states have call predecessors, (21), 6 states have return successors, (20), 11 states have call predecessors, (20), 12 states have call successors, (20) [2021-12-06 19:49:52,135 WARN L227 SmtUtils]: Spent 8.59s 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) [2021-12-06 19:50:02,203 WARN L227 SmtUtils]: Spent 10.03s 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) [2021-12-06 19:50:18,391 WARN L227 SmtUtils]: Spent 16.15s on a formula simplification. DAG size of input: 43 DAG size of output: 42 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 19:50:24,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:50:24,715 INFO L93 Difference]: Finished difference Result 1267 states and 1442 transitions. [2021-12-06 19:50:24,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-06 19:50:24,716 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 4.655172413793103) internal successors, (135), 28 states have internal predecessors, (135), 12 states have call successors, (21), 4 states have call predecessors, (21), 6 states have return successors, (20), 11 states have call predecessors, (20), 12 states have call successors, (20) Word has length 157 [2021-12-06 19:50:24,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:50:24,719 INFO L225 Difference]: With dead ends: 1267 [2021-12-06 19:50:24,719 INFO L226 Difference]: Without dead ends: 991 [2021-12-06 19:50:24,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 166 SyntacticMatches, 8 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 86.4s TimeCoverageRelationStatistics Valid=153, Invalid=1390, Unknown=17, NotChecked=0, Total=1560 [2021-12-06 19:50:24,721 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 27 mSDsluCounter, 1313 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 1405 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 170 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 19:50:24,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 1405 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 218 Invalid, 0 Unknown, 170 Unchecked, 0.2s Time] [2021-12-06 19:50:24,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 991 states. [2021-12-06 19:50:24,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 991 to 905. [2021-12-06 19:50:24,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 905 states, 715 states have (on average 1.0797202797202796) internal successors, (772), 734 states have internal predecessors, (772), 101 states have call successors, (101), 69 states have call predecessors, (101), 88 states have return successors, (140), 101 states have call predecessors, (140), 99 states have call successors, (140) [2021-12-06 19:50:24,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 1013 transitions. [2021-12-06 19:50:24,820 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 1013 transitions. Word has length 157 [2021-12-06 19:50:24,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:50:24,821 INFO L470 AbstractCegarLoop]: Abstraction has 905 states and 1013 transitions. [2021-12-06 19:50:24,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 4.655172413793103) internal successors, (135), 28 states have internal predecessors, (135), 12 states have call successors, (21), 4 states have call predecessors, (21), 6 states have return successors, (20), 11 states have call predecessors, (20), 12 states have call successors, (20) [2021-12-06 19:50:24,821 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 1013 transitions. [2021-12-06 19:50:24,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-12-06 19:50:24,822 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:50:24,823 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:50:24,843 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-12-06 19:50:25,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-12-06 19:50:25,024 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:50:25,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:50:25,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1657217267, now seen corresponding path program 1 times [2021-12-06 19:50:25,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:50:25,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540100929] [2021-12-06 19:50:25,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:50:25,026 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:50:25,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:50:25,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 19:50:25,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:50:25,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:50:25,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:50:25,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 19:50:25,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:50:25,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 19:50:25,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:50:25,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-06 19:50:25,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:50:25,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-06 19:50:25,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:50:25,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 19:50:25,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:50:25,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-06 19:50:25,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:50:25,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-06 19:50:25,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:50:25,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 19:50:25,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:50:25,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-12-06 19:50:25,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:50:25,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-12-06 19:50:25,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:50:25,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-12-06 19:50:25,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:50:25,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2021-12-06 19:50:25,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:50:25,333 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 72 proven. 3 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-12-06 19:50:25,333 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:50:25,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540100929] [2021-12-06 19:50:25,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540100929] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:50:25,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000860971] [2021-12-06 19:50:25,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:50:25,333 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:50:25,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:50:25,334 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:50:25,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-12-06 19:50:25,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:50:25,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 617 conjuncts, 98 conjunts are in the unsatisfiable core [2021-12-06 19:50:25,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:50:25,547 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 19:50:25,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 19:50:25,557 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 19:50:25,557 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 9 treesize of output 15 [2021-12-06 19:50:27,541 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 105 proven. 38 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-06 19:50:27,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:50:29,906 WARN L838 $PredicateComparison]: unable to prove that (or (and (forall ((|v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.offset_BEFORE_CALL_115| Int) (|v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_115| Int)) (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_115|) (+ 16 |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.offset_BEFORE_CALL_115|)) 0)) (forall ((|v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.offset_BEFORE_CALL_115| Int) (|v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_115| Int)) (= (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_115|) (+ 16 |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.offset_BEFORE_CALL_115|)) 0))) (let ((.cse0 (select |c_#memory_$Pointer$.offset| |c_aws_linked_list_is_valid_#in~list#1.base|)) (.cse1 (+ 16 |c_aws_linked_list_is_valid_#in~list#1.offset|))) (and (= (select .cse0 .cse1) 0) (= .cse1 (select .cse0 |c_aws_linked_list_is_valid_#in~list#1.offset|)) (= (select (select |c_#memory_$Pointer$.base| |c_aws_linked_list_is_valid_#in~list#1.base|) .cse1) 0)))) is different from false [2021-12-06 19:50:38,052 WARN L227 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 34 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 19:50:46,517 WARN L227 SmtUtils]: Spent 8.38s on a formula simplification that was a NOOP. DAG size: 37 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 19:50:46,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000860971] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:50:46,532 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:50:46,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 28] total 36 [2021-12-06 19:50:46,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471328159] [2021-12-06 19:50:46,532 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:50:46,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-06 19:50:46,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:50:46,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-06 19:50:46,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1384, Unknown=1, NotChecked=76, Total=1640 [2021-12-06 19:50:46,533 INFO L87 Difference]: Start difference. First operand 905 states and 1013 transitions. Second operand has 36 states, 34 states have (on average 4.4411764705882355) internal successors, (151), 35 states have internal predecessors, (151), 16 states have call successors, (28), 5 states have call predecessors, (28), 9 states have return successors, (27), 14 states have call predecessors, (27), 15 states have call successors, (27) [2021-12-06 19:50:47,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:50:47,836 INFO L93 Difference]: Finished difference Result 1162 states and 1315 transitions. [2021-12-06 19:50:47,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-12-06 19:50:47,836 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 34 states have (on average 4.4411764705882355) internal successors, (151), 35 states have internal predecessors, (151), 16 states have call successors, (28), 5 states have call predecessors, (28), 9 states have return successors, (27), 14 states have call predecessors, (27), 15 states have call successors, (27) Word has length 146 [2021-12-06 19:50:47,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:50:47,840 INFO L225 Difference]: With dead ends: 1162 [2021-12-06 19:50:47,840 INFO L226 Difference]: Without dead ends: 1138 [2021-12-06 19:50:47,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 180 SyntacticMatches, 16 SemanticMatches, 61 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1163 ImplicationChecksByTransitivity, 20.8s TimeCoverageRelationStatistics Valid=437, Invalid=3348, Unknown=1, NotChecked=120, Total=3906 [2021-12-06 19:50:47,841 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 177 mSDsluCounter, 1523 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 1634 SdHoareTripleChecker+Invalid, 1384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 662 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 19:50:47,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 1634 Invalid, 1384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 632 Invalid, 0 Unknown, 662 Unchecked, 0.4s Time] [2021-12-06 19:50:47,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1138 states. [2021-12-06 19:50:47,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1138 to 958. [2021-12-06 19:50:47,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 958 states, 749 states have (on average 1.0827770360480642) internal successors, (811), 775 states have internal predecessors, (811), 107 states have call successors, (107), 73 states have call predecessors, (107), 101 states have return successors, (160), 109 states have call predecessors, (160), 105 states have call successors, (160) [2021-12-06 19:50:47,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 958 states to 958 states and 1078 transitions. [2021-12-06 19:50:47,942 INFO L78 Accepts]: Start accepts. Automaton has 958 states and 1078 transitions. Word has length 146 [2021-12-06 19:50:47,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:50:47,943 INFO L470 AbstractCegarLoop]: Abstraction has 958 states and 1078 transitions. [2021-12-06 19:50:47,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 34 states have (on average 4.4411764705882355) internal successors, (151), 35 states have internal predecessors, (151), 16 states have call successors, (28), 5 states have call predecessors, (28), 9 states have return successors, (27), 14 states have call predecessors, (27), 15 states have call successors, (27) [2021-12-06 19:50:47,943 INFO L276 IsEmpty]: Start isEmpty. Operand 958 states and 1078 transitions. [2021-12-06 19:50:47,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-12-06 19:50:47,944 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:50:47,945 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:50:47,965 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-12-06 19:50:48,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:50:48,146 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:50:48,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:50:48,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1435376393, now seen corresponding path program 1 times [2021-12-06 19:50:48,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:50:48,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64429521] [2021-12-06 19:50:48,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:50:48,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:50:48,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:50:48,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 19:50:48,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:50:48,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:50:48,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:50:48,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 19:50:48,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:50:48,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 19:50:48,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:50:48,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-06 19:50:48,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:50:48,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-06 19:50:48,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:50:48,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 19:50:48,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:50:48,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-06 19:50:48,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:50:48,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-06 19:50:48,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:50:48,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 19:50:48,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:50:48,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-12-06 19:50:48,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:50:48,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-12-06 19:50:48,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:50:48,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-12-06 19:50:48,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:50:48,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2021-12-06 19:50:48,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:50:48,505 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 29 proven. 53 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-12-06 19:50:48,506 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:50:48,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64429521] [2021-12-06 19:50:48,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64429521] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:50:48,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355799176] [2021-12-06 19:50:48,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:50:48,506 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:50:48,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:50:48,507 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:50:48,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-12-06 19:50:48,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:50:48,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 607 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-06 19:50:48,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:50:48,738 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 19:50:48,738 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 9 treesize of output 15 [2021-12-06 19:50:48,749 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 19:50:48,750 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 9 treesize of output 15 [2021-12-06 19:50:50,152 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 110 proven. 28 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-06 19:50:50,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:50:50,655 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 49 proven. 33 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-12-06 19:50:50,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355799176] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:50:50,655 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:50:50,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19, 12] total 33 [2021-12-06 19:50:50,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752947887] [2021-12-06 19:50:50,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:50:50,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-06 19:50:50,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:50:50,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-06 19:50:50,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=921, Unknown=0, NotChecked=0, Total=1056 [2021-12-06 19:50:50,657 INFO L87 Difference]: Start difference. First operand 958 states and 1078 transitions. Second operand has 33 states, 30 states have (on average 5.3) internal successors, (159), 32 states have internal predecessors, (159), 13 states have call successors, (32), 4 states have call predecessors, (32), 7 states have return successors, (32), 11 states have call predecessors, (32), 12 states have call successors, (32) [2021-12-06 19:50:51,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:50:51,808 INFO L93 Difference]: Finished difference Result 1187 states and 1311 transitions. [2021-12-06 19:50:51,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-06 19:50:51,808 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 30 states have (on average 5.3) internal successors, (159), 32 states have internal predecessors, (159), 13 states have call successors, (32), 4 states have call predecessors, (32), 7 states have return successors, (32), 11 states have call predecessors, (32), 12 states have call successors, (32) Word has length 146 [2021-12-06 19:50:51,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:50:51,812 INFO L225 Difference]: With dead ends: 1187 [2021-12-06 19:50:51,812 INFO L226 Difference]: Without dead ends: 1138 [2021-12-06 19:50:51,812 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 293 SyntacticMatches, 12 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=396, Invalid=2054, Unknown=0, NotChecked=0, Total=2450 [2021-12-06 19:50:51,813 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 192 mSDsluCounter, 874 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 959 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 198 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 19:50:51,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 959 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 357 Invalid, 0 Unknown, 198 Unchecked, 0.3s Time] [2021-12-06 19:50:51,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1138 states. [2021-12-06 19:50:51,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1138 to 1114. [2021-12-06 19:50:51,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1114 states, 880 states have (on average 1.0704545454545455) internal successors, (942), 910 states have internal predecessors, (942), 115 states have call successors, (115), 87 states have call predecessors, (115), 118 states have return successors, (164), 116 states have call predecessors, (164), 114 states have call successors, (164) [2021-12-06 19:50:51,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1114 states to 1114 states and 1221 transitions. [2021-12-06 19:50:51,934 INFO L78 Accepts]: Start accepts. Automaton has 1114 states and 1221 transitions. Word has length 146 [2021-12-06 19:50:51,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:50:51,935 INFO L470 AbstractCegarLoop]: Abstraction has 1114 states and 1221 transitions. [2021-12-06 19:50:51,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 30 states have (on average 5.3) internal successors, (159), 32 states have internal predecessors, (159), 13 states have call successors, (32), 4 states have call predecessors, (32), 7 states have return successors, (32), 11 states have call predecessors, (32), 12 states have call successors, (32) [2021-12-06 19:50:51,935 INFO L276 IsEmpty]: Start isEmpty. Operand 1114 states and 1221 transitions. [2021-12-06 19:50:51,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-12-06 19:50:51,936 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:50:51,936 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:50:51,957 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-12-06 19:50:52,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-12-06 19:50:52,138 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:50:52,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:50:52,138 INFO L85 PathProgramCache]: Analyzing trace with hash 1693541831, now seen corresponding path program 1 times [2021-12-06 19:50:52,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:50:52,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605986732] [2021-12-06 19:50:52,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:50:52,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:50:52,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:50:52,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 19:50:52,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:50:52,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:50:52,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:50:52,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 19:50:52,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:50:52,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 19:50:52,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:50:52,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-06 19:50:52,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:50:52,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-06 19:50:52,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:50:52,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 19:50:52,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:50:52,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-06 19:50:52,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:50:52,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-06 19:50:52,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:50:52,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 19:50:52,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:50:52,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-12-06 19:50:52,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:50:52,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-12-06 19:50:52,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:50:52,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-12-06 19:50:52,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:50:52,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2021-12-06 19:50:52,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:50:52,400 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 26 proven. 57 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-12-06 19:50:52,400 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:50:52,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605986732] [2021-12-06 19:50:52,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605986732] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:50:52,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482232592] [2021-12-06 19:50:52,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:50:52,400 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:50:52,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:50:52,401 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:50:52,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-12-06 19:50:52,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:50:52,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 602 conjuncts, 42 conjunts are in the unsatisfiable core [2021-12-06 19:50:52,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:50:52,609 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 19:50:52,610 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 9 treesize of output 15 [2021-12-06 19:50:52,619 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 19:50:52,619 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 9 treesize of output 15 [2021-12-06 19:50:54,268 WARN L860 $PredicateComparison]: unable to prove that (or (exists ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_59| Int) (|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_59| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_59|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_59|) 0))) (exists ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_59| Int) (|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_59| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_59|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_59|) 0)))) is different from true [2021-12-06 19:50:55,672 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 38 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 14 not checked. [2021-12-06 19:50:55,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:50:56,149 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 26 proven. 56 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-12-06 19:50:56,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482232592] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:50:56,150 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:50:56,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16, 11] total 33 [2021-12-06 19:50:56,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049132233] [2021-12-06 19:50:56,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:50:56,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-06 19:50:56,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:50:56,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-06 19:50:56,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=882, Unknown=1, NotChecked=60, Total=1056 [2021-12-06 19:50:56,151 INFO L87 Difference]: Start difference. First operand 1114 states and 1221 transitions. Second operand has 33 states, 33 states have (on average 5.2727272727272725) internal successors, (174), 33 states have internal predecessors, (174), 10 states have call successors, (38), 4 states have call predecessors, (38), 8 states have return successors, (38), 10 states have call predecessors, (38), 9 states have call successors, (38) [2021-12-06 19:50:57,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:50:57,195 INFO L93 Difference]: Finished difference Result 1158 states and 1278 transitions. [2021-12-06 19:50:57,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-06 19:50:57,196 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.2727272727272725) internal successors, (174), 33 states have internal predecessors, (174), 10 states have call successors, (38), 4 states have call predecessors, (38), 8 states have return successors, (38), 10 states have call predecessors, (38), 9 states have call successors, (38) Word has length 146 [2021-12-06 19:50:57,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:50:57,200 INFO L225 Difference]: With dead ends: 1158 [2021-12-06 19:50:57,200 INFO L226 Difference]: Without dead ends: 1139 [2021-12-06 19:50:57,200 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 294 SyntacticMatches, 16 SemanticMatches, 53 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 755 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=337, Invalid=2528, Unknown=1, NotChecked=104, Total=2970 [2021-12-06 19:50:57,201 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 146 mSDsluCounter, 819 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 893 SdHoareTripleChecker+Invalid, 698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 383 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 19:50:57,201 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 893 Invalid, 698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 302 Invalid, 0 Unknown, 383 Unchecked, 0.2s Time] [2021-12-06 19:50:57,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1139 states. [2021-12-06 19:50:57,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1139 to 1042. [2021-12-06 19:50:57,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1042 states, 823 states have (on average 1.0668286755771568) internal successors, (878), 850 states have internal predecessors, (878), 109 states have call successors, (109), 81 states have call predecessors, (109), 109 states have return successors, (152), 110 states have call predecessors, (152), 108 states have call successors, (152) [2021-12-06 19:50:57,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1042 states to 1042 states and 1139 transitions. [2021-12-06 19:50:57,341 INFO L78 Accepts]: Start accepts. Automaton has 1042 states and 1139 transitions. Word has length 146 [2021-12-06 19:50:57,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:50:57,341 INFO L470 AbstractCegarLoop]: Abstraction has 1042 states and 1139 transitions. [2021-12-06 19:50:57,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 5.2727272727272725) internal successors, (174), 33 states have internal predecessors, (174), 10 states have call successors, (38), 4 states have call predecessors, (38), 8 states have return successors, (38), 10 states have call predecessors, (38), 9 states have call successors, (38) [2021-12-06 19:50:57,341 INFO L276 IsEmpty]: Start isEmpty. Operand 1042 states and 1139 transitions. [2021-12-06 19:50:57,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-12-06 19:50:57,343 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:50:57,343 INFO L514 BasicCegarLoop]: trace histogram [8, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 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] [2021-12-06 19:50:57,364 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-12-06 19:50:57,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-12-06 19:50:57,543 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:50:57,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:50:57,544 INFO L85 PathProgramCache]: Analyzing trace with hash 507350458, now seen corresponding path program 1 times [2021-12-06 19:50:57,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:50:57,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825369961] [2021-12-06 19:50:57,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:50:57,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:50:57,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:50:57,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 19:50:57,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:50:57,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:50:57,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:50:57,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-06 19:50:57,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:50:57,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 19:50:57,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:50:57,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 19:50:57,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:50:57,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-06 19:50:57,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:50:57,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-06 19:50:57,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:50:57,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 19:50:57,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:50:57,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 19:50:57,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:50:57,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-12-06 19:50:57,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:50:57,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-12-06 19:50:57,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:50:57,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 19:50:57,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:50:57,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 19:50:57,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:50:57,996 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 39 proven. 44 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2021-12-06 19:50:57,996 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:50:57,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825369961] [2021-12-06 19:50:57,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825369961] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:50:57,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48366811] [2021-12-06 19:50:57,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:50:57,997 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:50:57,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:50:57,997 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:50:57,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-12-06 19:50:58,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:50:58,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 757 conjuncts, 148 conjunts are in the unsatisfiable core [2021-12-06 19:50:58,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:50:58,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 19:50:58,288 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2021-12-06 19:50:58,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:50:58,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-06 19:50:58,352 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-12-06 19:50:58,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 34 [2021-12-06 19:50:58,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:50:58,363 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-12-06 19:50:58,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 40 [2021-12-06 19:50:58,371 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-12-06 19:50:58,371 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 15 treesize of output 15 [2021-12-06 19:50:58,471 INFO L354 Elim1Store]: treesize reduction 124, result has 14.5 percent of original size [2021-12-06 19:50:58,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 127 treesize of output 97 [2021-12-06 19:50:58,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:50:58,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 103 [2021-12-06 19:50:58,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 17 [2021-12-06 19:50:58,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:50:58,512 INFO L354 Elim1Store]: treesize reduction 20, result has 4.8 percent of original size [2021-12-06 19:50:58,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 102 treesize of output 59 [2021-12-06 19:50:58,515 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 15 treesize of output 11 [2021-12-06 19:51:02,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 19:51:02,387 INFO L354 Elim1Store]: treesize reduction 284, result has 0.4 percent of original size [2021-12-06 19:51:02,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 162 treesize of output 1 [2021-12-06 19:51:02,450 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 143 proven. 12 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-12-06 19:51:02,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:51:03,024 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 45 treesize of output 29 [2021-12-06 19:51:03,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48366811] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:51:03,117 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:51:03,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 20] total 33 [2021-12-06 19:51:03,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670171745] [2021-12-06 19:51:03,117 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:51:03,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-06 19:51:03,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:51:03,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-06 19:51:03,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1227, Unknown=1, NotChecked=0, Total=1332 [2021-12-06 19:51:03,118 INFO L87 Difference]: Start difference. First operand 1042 states and 1139 transitions. Second operand has 33 states, 32 states have (on average 4.28125) internal successors, (137), 31 states have internal predecessors, (137), 11 states have call successors, (21), 3 states have call predecessors, (21), 6 states have return successors, (20), 9 states have call predecessors, (20), 11 states have call successors, (20) [2021-12-06 19:51:06,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:51:06,763 INFO L93 Difference]: Finished difference Result 1654 states and 1869 transitions. [2021-12-06 19:51:06,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-06 19:51:06,764 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 4.28125) internal successors, (137), 31 states have internal predecessors, (137), 11 states have call successors, (21), 3 states have call predecessors, (21), 6 states have return successors, (20), 9 states have call predecessors, (20), 11 states have call successors, (20) Word has length 150 [2021-12-06 19:51:06,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:51:06,768 INFO L225 Difference]: With dead ends: 1654 [2021-12-06 19:51:06,768 INFO L226 Difference]: Without dead ends: 1229 [2021-12-06 19:51:06,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=227, Invalid=2851, Unknown=2, NotChecked=0, Total=3080 [2021-12-06 19:51:06,769 INFO L933 BasicCegarLoop]: 123 mSDtfsCounter, 107 mSDsluCounter, 1773 mSDsCounter, 0 mSdLazyCounter, 836 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 1896 SdHoareTripleChecker+Invalid, 1885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 836 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 911 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 19:51:06,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 1896 Invalid, 1885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 836 Invalid, 0 Unknown, 911 Unchecked, 0.7s Time] [2021-12-06 19:51:06,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1229 states. [2021-12-06 19:51:06,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1229 to 1133. [2021-12-06 19:51:06,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1133 states, 887 states have (on average 1.0710259301014655) internal successors, (950), 916 states have internal predecessors, (950), 131 states have call successors, (131), 84 states have call predecessors, (131), 114 states have return successors, (186), 132 states have call predecessors, (186), 130 states have call successors, (186) [2021-12-06 19:51:06,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1133 states to 1133 states and 1267 transitions. [2021-12-06 19:51:06,921 INFO L78 Accepts]: Start accepts. Automaton has 1133 states and 1267 transitions. Word has length 150 [2021-12-06 19:51:06,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:51:06,921 INFO L470 AbstractCegarLoop]: Abstraction has 1133 states and 1267 transitions. [2021-12-06 19:51:06,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 4.28125) internal successors, (137), 31 states have internal predecessors, (137), 11 states have call successors, (21), 3 states have call predecessors, (21), 6 states have return successors, (20), 9 states have call predecessors, (20), 11 states have call successors, (20) [2021-12-06 19:51:06,922 INFO L276 IsEmpty]: Start isEmpty. Operand 1133 states and 1267 transitions. [2021-12-06 19:51:06,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-12-06 19:51:06,923 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:51:06,923 INFO L514 BasicCegarLoop]: trace histogram [8, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 3, 3, 3, 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] [2021-12-06 19:51:06,944 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2021-12-06 19:51:07,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-12-06 19:51:07,124 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:51:07,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:51:07,125 INFO L85 PathProgramCache]: Analyzing trace with hash 2062249852, now seen corresponding path program 2 times [2021-12-06 19:51:07,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:51:07,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329576725] [2021-12-06 19:51:07,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:51:07,126 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:51:07,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:51:07,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 19:51:07,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:51:07,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:51:07,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:51:07,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 19:51:07,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:51:07,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 19:51:07,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:51:07,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 19:51:07,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:51:07,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-06 19:51:07,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:51:07,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-06 19:51:07,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:51:07,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 19:51:07,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:51:07,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 19:51:07,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:51:07,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-06 19:51:07,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:51:07,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-12-06 19:51:07,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:51:07,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 19:51:07,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:51:07,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 19:51:07,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:51:07,807 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 42 proven. 98 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-12-06 19:51:07,807 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:51:07,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329576725] [2021-12-06 19:51:07,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329576725] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:51:07,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392162693] [2021-12-06 19:51:07,807 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 19:51:07,807 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:51:07,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:51:07,808 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:51:07,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25618655-0b71-4f79-9561-b7ed2d40c140/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-12-06 19:51:07,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 19:51:07,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:51:08,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 702 conjuncts, 195 conjunts are in the unsatisfiable core [2021-12-06 19:51:08,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:51:08,116 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2021-12-06 19:51:08,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:51:08,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-06 19:51:08,123 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2021-12-06 19:51:08,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:51:08,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-06 19:51:08,215 INFO L354 Elim1Store]: treesize reduction 42, result has 20.8 percent of original size [2021-12-06 19:51:08,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 123 treesize of output 108 [2021-12-06 19:51:08,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:51:08,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 88 [2021-12-06 19:51:08,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-12-06 19:51:08,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:51:08,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:51:08,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:51:08,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 33 [2021-12-06 19:51:08,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:51:08,238 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 0 case distinctions, treesize of input 29 treesize of output 21 [2021-12-06 19:51:08,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 19:51:12,781 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 119 proven. 80 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-06 19:51:12,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:51:15,065 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3116 (Array Int Int)) (v_ArrVal_3117 (Array Int Int))) (let ((.cse7 (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24))) (let ((.cse5 (let ((.cse8 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 16))))) (store .cse8 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse8 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse7 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset|)))) (.cse2 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_3116) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_3117) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse7 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|)))) (let ((.cse1 (select (select .cse2 |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.offset|)) (.cse4 (select (select .cse5 |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.offset|))) (let ((.cse0 (select (select .cse2 .cse1) .cse4)) (.cse6 (select (select .cse5 .cse1) .cse4))) (or (not (= .cse0 |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base|)) (let ((.cse3 (+ .cse6 8))) (and (= .cse1 (select (select .cse2 .cse0) .cse3)) (= .cse4 (select (select .cse5 .cse0) .cse3)))) (not (= (+ 16 |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.offset|) .cse6)))))))) is different from false [2021-12-06 19:51:15,192 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:51:15,192 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 924 treesize of output 756 [2021-12-06 19:51:17,451 INFO L354 Elim1Store]: treesize reduction 58, result has 92.3 percent of original size [2021-12-06 19:51:17,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 24 new quantified variables, introduced 91 case distinctions, treesize of input 191185 treesize of output 160741 [2021-12-06 19:51:18,220 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:51:18,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 165163 treesize of output 125459 [2021-12-06 19:52:40,866 WARN L227 SmtUtils]: Spent 1.35m on a formula simplification. DAG size of input: 2476 DAG size of output: 1568 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-12-06 19:52:40,870 INFO L354 Elim1Store]: treesize reduction 5861, result has 50.9 percent of original size [2021-12-06 19:52:40,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 35 select indices, 35 select index equivalence classes, 0 disjoint index pairs (out of 595 index pairs), introduced 49 new quantified variables, introduced 595 case distinctions, treesize of input 2997557 treesize of output 2684235 [2021-12-06 19:52:59,081 WARN L227 SmtUtils]: Spent 18.19s on a formula simplification that was a NOOP. DAG size: 10789 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-06 19:53:16,838 WARN L227 SmtUtils]: Spent 17.64s on a formula simplification that was a NOOP. DAG size: 10618 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-06 19:53:17,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 19:53:20,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 19:53:21,676 INFO L244 Elim1Store]: Index analysis took 1329 ms