./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_hash_table_move_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1e43ad-89f1-44ef-8183-59726e9dc6ad/bin/utaipan-G1rejxKTta/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1e43ad-89f1-44ef-8183-59726e9dc6ad/bin/utaipan-G1rejxKTta/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1e43ad-89f1-44ef-8183-59726e9dc6ad/bin/utaipan-G1rejxKTta/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1e43ad-89f1-44ef-8183-59726e9dc6ad/bin/utaipan-G1rejxKTta/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_hash_table_move_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1e43ad-89f1-44ef-8183-59726e9dc6ad/bin/utaipan-G1rejxKTta/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1e43ad-89f1-44ef-8183-59726e9dc6ad/bin/utaipan-G1rejxKTta --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 Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash ba6eb72b2235d93ac0dcdd3f0e672793184c4cf65112c581319750a174c5bca8 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-dbf71c6-m [2022-10-17 17:41:28,755 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 17:41:28,758 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 17:41:28,789 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 17:41:28,790 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 17:41:28,791 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 17:41:28,793 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 17:41:28,795 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 17:41:28,797 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 17:41:28,798 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 17:41:28,800 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 17:41:28,801 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 17:41:28,802 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 17:41:28,803 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 17:41:28,804 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 17:41:28,806 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 17:41:28,809 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 17:41:28,810 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 17:41:28,813 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 17:41:28,815 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 17:41:28,817 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 17:41:28,827 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 17:41:28,828 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 17:41:28,829 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 17:41:28,835 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 17:41:28,835 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 17:41:28,836 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 17:41:28,837 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 17:41:28,837 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 17:41:28,841 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 17:41:28,842 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 17:41:28,844 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 17:41:28,846 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 17:41:28,847 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 17:41:28,850 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 17:41:28,851 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 17:41:28,851 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 17:41:28,851 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 17:41:28,851 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 17:41:28,852 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 17:41:28,853 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 17:41:28,853 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1e43ad-89f1-44ef-8183-59726e9dc6ad/bin/utaipan-G1rejxKTta/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-10-17 17:41:28,900 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 17:41:28,905 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 17:41:28,906 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 17:41:28,906 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 17:41:28,907 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 17:41:28,907 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 17:41:28,907 INFO L138 SettingsManager]: * User list type=DISABLED [2022-10-17 17:41:28,908 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-10-17 17:41:28,908 INFO L138 SettingsManager]: * Explicit value domain=true [2022-10-17 17:41:28,909 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-10-17 17:41:28,909 INFO L138 SettingsManager]: * Octagon Domain=false [2022-10-17 17:41:28,910 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-10-17 17:41:28,910 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-10-17 17:41:28,911 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-10-17 17:41:28,911 INFO L138 SettingsManager]: * Interval Domain=false [2022-10-17 17:41:28,911 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-10-17 17:41:28,911 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-10-17 17:41:28,912 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-10-17 17:41:28,913 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 17:41:28,913 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 17:41:28,913 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 17:41:28,913 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 17:41:28,914 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 17:41:28,914 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 17:41:28,914 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 17:41:28,914 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 17:41:28,915 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 17:41:28,915 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 17:41:28,915 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 17:41:28,915 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:41:28,916 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 17:41:28,916 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-10-17 17:41:28,916 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 17:41:28,917 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 17:41:28,917 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-10-17 17:41:28,917 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 17:41:28,917 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 17:41:28,918 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-10-17 17:41:28,918 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_9a1e43ad-89f1-44ef-8183-59726e9dc6ad/bin/utaipan-G1rejxKTta/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1e43ad-89f1-44ef-8183-59726e9dc6ad/bin/utaipan-G1rejxKTta Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ba6eb72b2235d93ac0dcdd3f0e672793184c4cf65112c581319750a174c5bca8 [2022-10-17 17:41:29,173 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 17:41:29,197 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 17:41:29,199 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 17:41:29,200 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 17:41:29,202 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 17:41:29,203 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1e43ad-89f1-44ef-8183-59726e9dc6ad/bin/utaipan-G1rejxKTta/../../sv-benchmarks/c/aws-c-common/aws_hash_table_move_harness.i [2022-10-17 17:41:29,275 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1e43ad-89f1-44ef-8183-59726e9dc6ad/bin/utaipan-G1rejxKTta/data/a82462baf/fde7a369ac3546f8ad6f391e75ac449a/FLAG14935c2e3 [2022-10-17 17:41:30,084 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 17:41:30,085 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1e43ad-89f1-44ef-8183-59726e9dc6ad/sv-benchmarks/c/aws-c-common/aws_hash_table_move_harness.i [2022-10-17 17:41:30,156 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1e43ad-89f1-44ef-8183-59726e9dc6ad/bin/utaipan-G1rejxKTta/data/a82462baf/fde7a369ac3546f8ad6f391e75ac449a/FLAG14935c2e3 [2022-10-17 17:41:30,563 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1e43ad-89f1-44ef-8183-59726e9dc6ad/bin/utaipan-G1rejxKTta/data/a82462baf/fde7a369ac3546f8ad6f391e75ac449a [2022-10-17 17:41:30,566 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 17:41:30,567 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 17:41:30,569 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 17:41:30,569 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 17:41:30,573 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 17:41:30,574 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:41:30" (1/1) ... [2022-10-17 17:41:30,575 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c2164eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:30, skipping insertion in model container [2022-10-17 17:41:30,575 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:41:30" (1/1) ... [2022-10-17 17:41:30,583 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 17:41:30,702 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 17:41:30,977 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_9a1e43ad-89f1-44ef-8183-59726e9dc6ad/sv-benchmarks/c/aws-c-common/aws_hash_table_move_harness.i[4493,4506] [2022-10-17 17:41:30,986 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_9a1e43ad-89f1-44ef-8183-59726e9dc6ad/sv-benchmarks/c/aws-c-common/aws_hash_table_move_harness.i[4553,4566] [2022-10-17 17:41:32,163 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:41:32,164 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:41:32,164 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:41:32,165 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:41:32,167 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:41:32,182 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:41:32,183 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:41:32,185 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:41:32,186 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:41:32,188 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:41:32,189 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:41:32,190 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:41:32,190 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:41:32,735 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-10-17 17:41:32,736 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-10-17 17:41:32,737 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-10-17 17:41:32,738 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-10-17 17:41:32,740 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-10-17 17:41:32,741 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-10-17 17:41:32,741 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-10-17 17:41:32,742 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-10-17 17:41:32,743 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-10-17 17:41:32,744 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-10-17 17:41:32,975 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-10-17 17:41:33,349 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:41:33,350 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:41:33,387 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:41:33,389 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:41:33,396 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:41:33,396 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:41:33,417 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:41:33,418 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:41:33,419 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:41:33,420 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:41:33,420 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:41:33,421 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:41:33,421 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:41:33,477 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:41:33,520 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 17:41:33,547 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_9a1e43ad-89f1-44ef-8183-59726e9dc6ad/sv-benchmarks/c/aws-c-common/aws_hash_table_move_harness.i[4493,4506] [2022-10-17 17:41:33,547 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_9a1e43ad-89f1-44ef-8183-59726e9dc6ad/sv-benchmarks/c/aws-c-common/aws_hash_table_move_harness.i[4553,4566] [2022-10-17 17:41:33,598 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:41:33,600 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:41:33,600 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:41:33,601 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:41:33,601 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:41:33,609 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:41:33,610 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:41:33,611 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:41:33,612 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:41:33,615 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:41:33,615 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:41:33,616 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:41:33,616 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:41:33,688 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-10-17 17:41:33,691 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-10-17 17:41:33,691 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-10-17 17:41:33,692 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-10-17 17:41:33,693 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-10-17 17:41:33,694 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-10-17 17:41:33,694 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-10-17 17:41:33,694 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-10-17 17:41:33,695 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-10-17 17:41:33,695 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-10-17 17:41:33,721 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-10-17 17:41:33,855 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:41:33,855 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:41:33,863 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:41:33,864 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:41:33,868 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:41:33,868 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:41:33,883 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:41:33,884 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:41:33,885 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:41:33,885 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:41:33,885 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:41:33,886 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:41:33,886 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:41:33,938 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:41:34,322 INFO L208 MainTranslator]: Completed translation [2022-10-17 17:41:34,322 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:34 WrapperNode [2022-10-17 17:41:34,322 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 17:41:34,324 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 17:41:34,324 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 17:41:34,325 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 17:41:34,333 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:34" (1/1) ... [2022-10-17 17:41:34,477 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:34" (1/1) ... [2022-10-17 17:41:34,569 INFO L138 Inliner]: procedures = 774, calls = 2432, calls flagged for inlining = 69, calls inlined = 12, statements flattened = 622 [2022-10-17 17:41:34,582 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 17:41:34,583 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 17:41:34,584 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 17:41:34,584 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 17:41:34,593 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:34" (1/1) ... [2022-10-17 17:41:34,594 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:34" (1/1) ... [2022-10-17 17:41:34,613 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:34" (1/1) ... [2022-10-17 17:41:34,614 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:34" (1/1) ... [2022-10-17 17:41:34,653 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:34" (1/1) ... [2022-10-17 17:41:34,658 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:34" (1/1) ... [2022-10-17 17:41:34,666 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:34" (1/1) ... [2022-10-17 17:41:34,671 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:34" (1/1) ... [2022-10-17 17:41:34,681 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 17:41:34,682 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 17:41:34,682 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 17:41:34,682 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 17:41:34,683 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:34" (1/1) ... [2022-10-17 17:41:34,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:41:34,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1e43ad-89f1-44ef-8183-59726e9dc6ad/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:41:34,715 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1e43ad-89f1-44ef-8183-59726e9dc6ad/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 17:41:34,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1e43ad-89f1-44ef-8183-59726e9dc6ad/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 17:41:34,823 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2022-10-17 17:41:34,824 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-17 17:41:34,824 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2022-10-17 17:41:34,824 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2022-10-17 17:41:34,825 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-10-17 17:41:34,825 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-10-17 17:41:34,825 INFO L130 BoogieDeclarations]: Found specification of procedure hash_table_state_is_valid [2022-10-17 17:41:34,826 INFO L138 BoogieDeclarations]: Found implementation of procedure hash_table_state_is_valid [2022-10-17 17:41:34,826 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-10-17 17:41:34,826 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 17:41:34,826 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-10-17 17:41:34,826 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 17:41:34,826 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 17:41:34,827 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2022-10-17 17:41:34,827 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2022-10-17 17:41:34,827 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2022-10-17 17:41:34,828 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2022-10-17 17:41:34,828 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-10-17 17:41:34,828 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-10-17 17:41:34,829 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-17 17:41:34,829 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_plus [2022-10-17 17:41:34,829 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_plus [2022-10-17 17:41:34,829 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-10-17 17:41:34,829 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2022-10-17 17:41:34,829 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2022-10-17 17:41:34,830 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-17 17:41:34,830 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_power_of_two [2022-10-17 17:41:34,830 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_power_of_two [2022-10-17 17:41:34,830 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-17 17:41:34,831 INFO L130 BoogieDeclarations]: Found specification of procedure hash_table_state_required_bytes [2022-10-17 17:41:34,831 INFO L138 BoogieDeclarations]: Found implementation of procedure hash_table_state_required_bytes [2022-10-17 17:41:34,831 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-10-17 17:41:34,831 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-10-17 17:41:34,832 INFO L130 BoogieDeclarations]: Found specification of procedure aws_hash_table_is_valid [2022-10-17 17:41:34,833 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_hash_table_is_valid [2022-10-17 17:41:34,835 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-10-17 17:41:34,835 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2022-10-17 17:41:34,836 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2022-10-17 17:41:34,836 INFO L130 BoogieDeclarations]: Found specification of procedure aws_add_size_checked [2022-10-17 17:41:34,836 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_add_size_checked [2022-10-17 17:41:34,837 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 17:41:35,228 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 17:41:35,230 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 17:41:36,171 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 17:41:36,350 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 17:41:36,351 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-10-17 17:41:36,355 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:41:36 BoogieIcfgContainer [2022-10-17 17:41:36,355 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 17:41:36,358 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 17:41:36,358 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 17:41:36,361 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 17:41:36,362 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 05:41:30" (1/3) ... [2022-10-17 17:41:36,362 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54a97be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:41:36, skipping insertion in model container [2022-10-17 17:41:36,363 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:34" (2/3) ... [2022-10-17 17:41:36,363 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54a97be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:41:36, skipping insertion in model container [2022-10-17 17:41:36,363 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:41:36" (3/3) ... [2022-10-17 17:41:36,365 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_hash_table_move_harness.i [2022-10-17 17:41:36,384 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 17:41:36,384 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 17:41:36,465 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 17:41:36,478 INFO L357 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=FINITE_AUTOMATA, 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@be91a25, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 17:41:36,478 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-17 17:41:36,482 INFO L276 IsEmpty]: Start isEmpty. Operand has 101 states, 54 states have (on average 1.1851851851851851) internal successors, (64), 54 states have internal predecessors, (64), 32 states have call successors, (32), 14 states have call predecessors, (32), 14 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-10-17 17:41:36,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-10-17 17:41:36,501 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:41:36,502 INFO L195 NwaCegarLoop]: trace histogram [10, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:41:36,503 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:41:36,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:41:36,510 INFO L85 PathProgramCache]: Analyzing trace with hash -1806303517, now seen corresponding path program 1 times [2022-10-17 17:41:36,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:41:36,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818585713] [2022-10-17 17:41:36,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:41:36,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:41:36,919 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-17 17:41:36,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [961252446] [2022-10-17 17:41:36,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:41:36,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:41:36,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1e43ad-89f1-44ef-8183-59726e9dc6ad/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:41:36,927 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1e43ad-89f1-44ef-8183-59726e9dc6ad/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:41:36,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1e43ad-89f1-44ef-8183-59726e9dc6ad/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-17 17:41:37,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:41:37,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 2391 conjuncts, 1 conjunts are in the unsatisfiable core [2022-10-17 17:41:37,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:41:37,706 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2022-10-17 17:41:37,710 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:41:37,711 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:41:37,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818585713] [2022-10-17 17:41:37,711 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-17 17:41:37,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961252446] [2022-10-17 17:41:37,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961252446] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:41:37,712 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:41:37,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 17:41:37,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870011431] [2022-10-17 17:41:37,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:41:37,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-10-17 17:41:37,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:41:37,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-10-17 17:41:37,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-17 17:41:37,760 INFO L87 Difference]: Start difference. First operand has 101 states, 54 states have (on average 1.1851851851851851) internal successors, (64), 54 states have internal predecessors, (64), 32 states have call successors, (32), 14 states have call predecessors, (32), 14 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) Second operand has 2 states, 2 states have (on average 17.5) internal successors, (35), 2 states have internal predecessors, (35), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-10-17 17:41:38,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:41:38,144 INFO L93 Difference]: Finished difference Result 136 states and 174 transitions. [2022-10-17 17:41:38,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-17 17:41:38,147 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 17.5) internal successors, (35), 2 states have internal predecessors, (35), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 100 [2022-10-17 17:41:38,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:41:38,160 INFO L225 Difference]: With dead ends: 136 [2022-10-17 17:41:38,160 INFO L226 Difference]: Without dead ends: 99 [2022-10-17 17:41:38,164 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-17 17:41:38,177 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-17 17:41:38,179 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 106 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-17 17:41:38,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-10-17 17:41:38,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2022-10-17 17:41:38,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 52 states have (on average 1.1538461538461537) internal successors, (60), 53 states have internal predecessors, (60), 32 states have call successors, (32), 14 states have call predecessors, (32), 14 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-10-17 17:41:38,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 123 transitions. [2022-10-17 17:41:38,249 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 123 transitions. Word has length 100 [2022-10-17 17:41:38,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:41:38,253 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 123 transitions. [2022-10-17 17:41:38,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 17.5) internal successors, (35), 2 states have internal predecessors, (35), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-10-17 17:41:38,254 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 123 transitions. [2022-10-17 17:41:38,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-10-17 17:41:38,265 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:41:38,266 INFO L195 NwaCegarLoop]: trace histogram [10, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:41:38,301 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1e43ad-89f1-44ef-8183-59726e9dc6ad/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-10-17 17:41:38,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1e43ad-89f1-44ef-8183-59726e9dc6ad/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-10-17 17:41:38,489 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:41:38,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:41:38,490 INFO L85 PathProgramCache]: Analyzing trace with hash 493483735, now seen corresponding path program 1 times [2022-10-17 17:41:38,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:41:38,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164019235] [2022-10-17 17:41:38,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:41:38,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:41:38,740 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-17 17:41:38,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1602583441] [2022-10-17 17:41:38,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:41:38,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:41:38,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1e43ad-89f1-44ef-8183-59726e9dc6ad/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:41:38,747 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1e43ad-89f1-44ef-8183-59726e9dc6ad/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:41:38,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1e43ad-89f1-44ef-8183-59726e9dc6ad/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-17 17:41:39,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:41:39,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 2419 conjuncts, 7 conjunts are in the unsatisfiable core [2022-10-17 17:41:39,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:41:39,412 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-10-17 17:41:39,412 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:41:39,412 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:41:39,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164019235] [2022-10-17 17:41:39,413 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-17 17:41:39,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602583441] [2022-10-17 17:41:39,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602583441] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:41:39,413 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:41:39,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 17:41:39,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139603240] [2022-10-17 17:41:39,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:41:39,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 17:41:39,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:41:39,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 17:41:39,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:41:39,418 INFO L87 Difference]: Start difference. First operand 99 states and 123 transitions. Second operand has 5 states, 4 states have (on average 10.75) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 3 states have call predecessors, (23), 2 states have call successors, (23) [2022-10-17 17:41:40,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:41:40,653 INFO L93 Difference]: Finished difference Result 192 states and 239 transitions. [2022-10-17 17:41:40,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 17:41:40,654 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 10.75) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 3 states have call predecessors, (23), 2 states have call successors, (23) Word has length 105 [2022-10-17 17:41:40,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:41:40,662 INFO L225 Difference]: With dead ends: 192 [2022-10-17 17:41:40,666 INFO L226 Difference]: Without dead ends: 103 [2022-10-17 17:41:40,667 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-10-17 17:41:40,669 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 1 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-10-17 17:41:40,672 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 407 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-10-17 17:41:40,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-10-17 17:41:40,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2022-10-17 17:41:40,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 55 states have (on average 1.1454545454545455) internal successors, (63), 56 states have internal predecessors, (63), 32 states have call successors, (32), 14 states have call predecessors, (32), 15 states have return successors, (32), 32 states have call predecessors, (32), 31 states have call successors, (32) [2022-10-17 17:41:40,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 127 transitions. [2022-10-17 17:41:40,694 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 127 transitions. Word has length 105 [2022-10-17 17:41:40,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:41:40,697 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 127 transitions. [2022-10-17 17:41:40,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 10.75) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 3 states have call predecessors, (23), 2 states have call successors, (23) [2022-10-17 17:41:40,698 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 127 transitions. [2022-10-17 17:41:40,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-10-17 17:41:40,708 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:41:40,708 INFO L195 NwaCegarLoop]: trace histogram [10, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:41:40,751 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1e43ad-89f1-44ef-8183-59726e9dc6ad/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-17 17:41:40,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1e43ad-89f1-44ef-8183-59726e9dc6ad/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:41:40,935 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:41:40,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:41:40,935 INFO L85 PathProgramCache]: Analyzing trace with hash -774970137, now seen corresponding path program 1 times [2022-10-17 17:41:40,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:41:40,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142614283] [2022-10-17 17:41:40,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:41:40,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:41:41,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:41:43,398 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2022-10-17 17:41:43,398 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:41:43,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142614283] [2022-10-17 17:41:43,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142614283] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:41:43,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562689382] [2022-10-17 17:41:43,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:41:43,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:41:43,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1e43ad-89f1-44ef-8183-59726e9dc6ad/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:41:43,400 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1e43ad-89f1-44ef-8183-59726e9dc6ad/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:41:43,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1e43ad-89f1-44ef-8183-59726e9dc6ad/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-17 17:41:43,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:41:43,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 2425 conjuncts, 37 conjunts are in the unsatisfiable core [2022-10-17 17:41:43,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:41:44,172 INFO L390 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 11 treesize of output 7 [2022-10-17 17:41:44,660 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-10-17 17:41:44,661 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:41:44,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562689382] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:41:44,661 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 17:41:44,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 14 [2022-10-17 17:41:44,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162906531] [2022-10-17 17:41:44,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:41:44,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-10-17 17:41:44,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:41:44,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-10-17 17:41:44,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-10-17 17:41:44,664 INFO L87 Difference]: Start difference. First operand 103 states and 127 transitions. Second operand has 9 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (26), 3 states have call predecessors, (26), 4 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2022-10-17 17:41:47,886 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-17 17:41:48,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:41:48,429 INFO L93 Difference]: Finished difference Result 190 states and 232 transitions. [2022-10-17 17:41:48,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-10-17 17:41:48,430 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (26), 3 states have call predecessors, (26), 4 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) Word has length 113 [2022-10-17 17:41:48,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:41:48,432 INFO L225 Difference]: With dead ends: 190 [2022-10-17 17:41:48,432 INFO L226 Difference]: Without dead ends: 105 [2022-10-17 17:41:48,433 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-10-17 17:41:48,434 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 13 mSDsluCounter, 648 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 677 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-10-17 17:41:48,434 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 677 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 131 Invalid, 0 Unknown, 69 Unchecked, 3.7s Time] [2022-10-17 17:41:48,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-10-17 17:41:48,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2022-10-17 17:41:48,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 57 states have (on average 1.1403508771929824) internal successors, (65), 57 states have internal predecessors, (65), 32 states have call successors, (32), 15 states have call predecessors, (32), 15 states have return successors, (32), 32 states have call predecessors, (32), 31 states have call successors, (32) [2022-10-17 17:41:48,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 129 transitions. [2022-10-17 17:41:48,452 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 129 transitions. Word has length 113 [2022-10-17 17:41:48,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:41:48,453 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 129 transitions. [2022-10-17 17:41:48,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (26), 3 states have call predecessors, (26), 4 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2022-10-17 17:41:48,453 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 129 transitions. [2022-10-17 17:41:48,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-10-17 17:41:48,455 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:41:48,455 INFO L195 NwaCegarLoop]: trace histogram [10, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:41:48,497 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1e43ad-89f1-44ef-8183-59726e9dc6ad/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-10-17 17:41:48,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1e43ad-89f1-44ef-8183-59726e9dc6ad/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:41:48,683 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:41:48,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:41:48,683 INFO L85 PathProgramCache]: Analyzing trace with hash -658417536, now seen corresponding path program 1 times [2022-10-17 17:41:48,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:41:48,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511980837] [2022-10-17 17:41:48,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:41:48,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:41:48,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:41:50,354 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2022-10-17 17:41:50,355 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:41:50,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511980837] [2022-10-17 17:41:50,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511980837] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:41:50,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488651752] [2022-10-17 17:41:50,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:41:50,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:41:50,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1e43ad-89f1-44ef-8183-59726e9dc6ad/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:41:50,359 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1e43ad-89f1-44ef-8183-59726e9dc6ad/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:41:50,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1e43ad-89f1-44ef-8183-59726e9dc6ad/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-10-17 17:41:50,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:41:50,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 2449 conjuncts, 35 conjunts are in the unsatisfiable core [2022-10-17 17:41:50,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:41:51,054 INFO L390 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 11 treesize of output 7 [2022-10-17 17:41:51,414 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-10-17 17:41:51,415 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:41:51,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488651752] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:41:51,416 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 17:41:51,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [8] total 18 [2022-10-17 17:41:51,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309293670] [2022-10-17 17:41:51,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:41:51,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-10-17 17:41:51,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:41:51,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-10-17 17:41:51,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2022-10-17 17:41:51,419 INFO L87 Difference]: Start difference. First operand 105 states and 129 transitions. Second operand has 12 states, 9 states have (on average 6.111111111111111) internal successors, (55), 10 states have internal predecessors, (55), 5 states have call successors, (27), 3 states have call predecessors, (27), 5 states have return successors, (26), 5 states have call predecessors, (26), 5 states have call successors, (26) [2022-10-17 17:41:52,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:41:52,814 INFO L93 Difference]: Finished difference Result 196 states and 239 transitions. [2022-10-17 17:41:52,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-10-17 17:41:52,815 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 6.111111111111111) internal successors, (55), 10 states have internal predecessors, (55), 5 states have call successors, (27), 3 states have call predecessors, (27), 5 states have return successors, (26), 5 states have call predecessors, (26), 5 states have call successors, (26) Word has length 119 [2022-10-17 17:41:52,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:41:52,818 INFO L225 Difference]: With dead ends: 196 [2022-10-17 17:41:52,819 INFO L226 Difference]: Without dead ends: 108 [2022-10-17 17:41:52,820 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2022-10-17 17:41:52,821 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 16 mSDsluCounter, 471 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-10-17 17:41:52,821 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 511 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 130 Invalid, 0 Unknown, 60 Unchecked, 1.3s Time] [2022-10-17 17:41:52,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-10-17 17:41:52,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2022-10-17 17:41:52,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 59 states have (on average 1.1355932203389831) internal successors, (67), 59 states have internal predecessors, (67), 33 states have call successors, (33), 16 states have call predecessors, (33), 15 states have return successors, (33), 32 states have call predecessors, (33), 32 states have call successors, (33) [2022-10-17 17:41:52,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 133 transitions. [2022-10-17 17:41:52,837 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 133 transitions. Word has length 119 [2022-10-17 17:41:52,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:41:52,837 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 133 transitions. [2022-10-17 17:41:52,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 6.111111111111111) internal successors, (55), 10 states have internal predecessors, (55), 5 states have call successors, (27), 3 states have call predecessors, (27), 5 states have return successors, (26), 5 states have call predecessors, (26), 5 states have call successors, (26) [2022-10-17 17:41:52,838 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 133 transitions. [2022-10-17 17:41:52,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-10-17 17:41:52,840 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:41:52,840 INFO L195 NwaCegarLoop]: trace histogram [10, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:41:52,881 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1e43ad-89f1-44ef-8183-59726e9dc6ad/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-10-17 17:41:53,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1e43ad-89f1-44ef-8183-59726e9dc6ad/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:41:53,067 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:41:53,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:41:53,067 INFO L85 PathProgramCache]: Analyzing trace with hash -569912338, now seen corresponding path program 1 times [2022-10-17 17:41:53,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:41:53,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583947179] [2022-10-17 17:41:53,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:41:53,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:41:53,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:41:56,986 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2022-10-17 17:41:56,986 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:41:56,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583947179] [2022-10-17 17:41:56,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583947179] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:41:56,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718710727] [2022-10-17 17:41:56,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:41:56,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:41:56,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1e43ad-89f1-44ef-8183-59726e9dc6ad/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:41:56,988 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1e43ad-89f1-44ef-8183-59726e9dc6ad/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:41:57,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1e43ad-89f1-44ef-8183-59726e9dc6ad/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-10-17 17:41:57,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:41:57,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 2478 conjuncts, 63 conjunts are in the unsatisfiable core [2022-10-17 17:41:57,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:41:57,817 INFO L390 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 11 treesize of output 7 [2022-10-17 17:41:58,923 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-10-17 17:41:58,923 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-10-17 17:41:59,608 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-10-17 17:41:59,608 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:41:59,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718710727] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:41:59,608 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 17:41:59,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 23 [2022-10-17 17:41:59,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121536694] [2022-10-17 17:41:59,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:41:59,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-10-17 17:41:59,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:41:59,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-10-17 17:41:59,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2022-10-17 17:41:59,611 INFO L87 Difference]: Start difference. First operand 108 states and 133 transitions. Second operand has 13 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 8 states have call successors, (28), 5 states have call predecessors, (28), 5 states have return successors, (27), 9 states have call predecessors, (27), 7 states have call successors, (27)