./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 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/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_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro --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 --- [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-8393723 [2022-11-18 19:49:15,091 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 19:49:15,097 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 19:49:15,123 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 19:49:15,124 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 19:49:15,125 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 19:49:15,126 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 19:49:15,128 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 19:49:15,129 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 19:49:15,130 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 19:49:15,131 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 19:49:15,132 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 19:49:15,133 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 19:49:15,133 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 19:49:15,135 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 19:49:15,136 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 19:49:15,137 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 19:49:15,138 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 19:49:15,139 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 19:49:15,142 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 19:49:15,143 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 19:49:15,146 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 19:49:15,148 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 19:49:15,148 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 19:49:15,152 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 19:49:15,153 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 19:49:15,153 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 19:49:15,154 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 19:49:15,154 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 19:49:15,155 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 19:49:15,156 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 19:49:15,157 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 19:49:15,157 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 19:49:15,158 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 19:49:15,164 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 19:49:15,166 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 19:49:15,167 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 19:49:15,167 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 19:49:15,167 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 19:49:15,168 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 19:49:15,169 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 19:49:15,170 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-11-18 19:49:15,218 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 19:49:15,218 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 19:49:15,219 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 19:49:15,219 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 19:49:15,220 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 19:49:15,220 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 19:49:15,220 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 19:49:15,221 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 19:49:15,221 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 19:49:15,221 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 19:49:15,222 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 19:49:15,222 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 19:49:15,222 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 19:49:15,223 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 19:49:15,223 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 19:49:15,223 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 19:49:15,223 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 19:49:15,223 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 19:49:15,224 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 19:49:15,224 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 19:49:15,224 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 19:49:15,224 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 19:49:15,224 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 19:49:15,224 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 19:49:15,225 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 19:49:15,225 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 19:49:15,226 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 19:49:15,226 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 19:49:15,227 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 19:49:15,227 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 19:49:15,227 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_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a49fa15b0860d2357f9ad3c8c6bab1d80cf83a6734355dc0b05c55121c837273 [2022-11-18 19:49:15,547 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 19:49:15,578 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 19:49:15,581 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 19:49:15,583 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 19:49:15,584 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 19:49:15,585 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i [2022-11-18 19:49:15,691 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/data/e119f7380/e19ddbe8d33d440099fac2e51073e2f4/FLAG50213e108 [2022-11-18 19:49:16,542 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 19:49:16,543 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i [2022-11-18 19:49:16,590 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/data/e119f7380/e19ddbe8d33d440099fac2e51073e2f4/FLAG50213e108 [2022-11-18 19:49:17,079 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/data/e119f7380/e19ddbe8d33d440099fac2e51073e2f4 [2022-11-18 19:49:17,082 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 19:49:17,084 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 19:49:17,087 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 19:49:17,088 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 19:49:17,091 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 19:49:17,092 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 07:49:17" (1/1) ... [2022-11-18 19:49:17,094 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b474a2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:49:17, skipping insertion in model container [2022-11-18 19:49:17,094 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 07:49:17" (1/1) ... [2022-11-18 19:49:17,102 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 19:49:17,203 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 19:49:17,523 WARN L234 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_95020206-82ce-4221-bd4b-8d48f434c820/sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i[4493,4506] [2022-11-18 19:49:17,531 WARN L234 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_95020206-82ce-4221-bd4b-8d48f434c820/sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i[4553,4566] [2022-11-18 19:49:18,393 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 19:49:18,394 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 19:49:18,395 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 19:49:18,395 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 19:49:18,396 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 19:49:18,425 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 19:49:18,425 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 19:49:18,427 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 19:49:18,428 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 19:49:18,429 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 19:49:18,430 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 19:49:18,431 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 19:49:18,431 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 19:49:18,754 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-18 19:49:18,756 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-18 19:49:18,757 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-18 19:49:18,759 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-18 19:49:18,760 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-18 19:49:18,761 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-18 19:49:18,762 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-18 19:49:18,763 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-18 19:49:18,764 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-18 19:49:18,765 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-18 19:49:18,912 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-18 19:49:18,937 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 19:49:18,965 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 19:49:18,989 WARN L234 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_95020206-82ce-4221-bd4b-8d48f434c820/sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i[4493,4506] [2022-11-18 19:49:19,003 WARN L234 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_95020206-82ce-4221-bd4b-8d48f434c820/sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i[4553,4566] [2022-11-18 19:49:19,054 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 19:49:19,054 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 19:49:19,055 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 19:49:19,055 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 19:49:19,056 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 19:49:19,065 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 19:49:19,066 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 19:49:19,067 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 19:49:19,068 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 19:49:19,069 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 19:49:19,070 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 19:49:19,071 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 19:49:19,071 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 19:49:19,109 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-18 19:49:19,110 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-18 19:49:19,111 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-18 19:49:19,112 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-18 19:49:19,113 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-18 19:49:19,114 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-18 19:49:19,114 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-18 19:49:19,115 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-18 19:49:19,115 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-18 19:49:19,116 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-18 19:49:19,148 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-18 19:49:19,164 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 19:49:19,331 INFO L208 MainTranslator]: Completed translation [2022-11-18 19:49:19,331 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:49:19 WrapperNode [2022-11-18 19:49:19,331 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 19:49:19,333 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 19:49:19,333 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 19:49:19,333 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 19:49:19,341 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:49:19" (1/1) ... [2022-11-18 19:49:19,450 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:49:19" (1/1) ... [2022-11-18 19:49:19,513 INFO L138 Inliner]: procedures = 679, calls = 1039, calls flagged for inlining = 52, calls inlined = 6, statements flattened = 135 [2022-11-18 19:49:19,516 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 19:49:19,517 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 19:49:19,517 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 19:49:19,518 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 19:49:19,527 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:49:19" (1/1) ... [2022-11-18 19:49:19,528 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:49:19" (1/1) ... [2022-11-18 19:49:19,538 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:49:19" (1/1) ... [2022-11-18 19:49:19,538 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:49:19" (1/1) ... [2022-11-18 19:49:19,556 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:49:19" (1/1) ... [2022-11-18 19:49:19,578 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:49:19" (1/1) ... [2022-11-18 19:49:19,581 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:49:19" (1/1) ... [2022-11-18 19:49:19,596 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:49:19" (1/1) ... [2022-11-18 19:49:19,600 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 19:49:19,601 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 19:49:19,601 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 19:49:19,601 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 19:49:19,602 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:49:19" (1/1) ... [2022-11-18 19:49:19,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 19:49:19,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:49:19,634 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 19:49:19,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 19:49:19,684 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 19:49:19,684 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-18 19:49:19,685 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-18 19:49:19,685 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2022-11-18 19:49:19,686 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2022-11-18 19:49:19,686 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-18 19:49:19,686 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2022-11-18 19:49:19,687 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2022-11-18 19:49:19,688 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 19:49:19,688 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-18 19:49:19,689 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 19:49:19,689 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 19:49:19,689 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-18 19:49:19,690 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-18 19:49:19,690 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-18 19:49:19,690 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-18 19:49:19,690 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-18 19:49:19,691 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2022-11-18 19:49:19,691 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2022-11-18 19:49:19,691 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 19:49:19,995 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 19:49:19,998 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 19:49:20,287 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 19:49:20,299 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 19:49:20,299 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-18 19:49:20,301 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 07:49:20 BoogieIcfgContainer [2022-11-18 19:49:20,301 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 19:49:20,306 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 19:49:20,307 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 19:49:20,310 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 19:49:20,311 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 07:49:17" (1/3) ... [2022-11-18 19:49:20,312 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bc9a752 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 07:49:20, skipping insertion in model container [2022-11-18 19:49:20,312 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:49:19" (2/3) ... [2022-11-18 19:49:20,313 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bc9a752 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 07:49:20, skipping insertion in model container [2022-11-18 19:49:20,314 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 07:49:20" (3/3) ... [2022-11-18 19:49:20,315 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_linked_list_end_harness.i [2022-11-18 19:49:20,335 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 19:49:20,336 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-18 19:49:20,395 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 19:49:20,406 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=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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@334d4a00, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 19:49:20,407 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-18 19:49:20,412 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) [2022-11-18 19:49:20,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-18 19:49:20,425 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:49:20,426 INFO L195 NwaCegarLoop]: 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] [2022-11-18 19:49:20,427 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:49:20,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:49:20,433 INFO L85 PathProgramCache]: Analyzing trace with hash -2107862704, now seen corresponding path program 1 times [2022-11-18 19:49:20,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:49:20,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093552503] [2022-11-18 19:49:20,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:49:20,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:49:20,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:20,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 19:49:20,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:20,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-18 19:49:20,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:20,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-18 19:49:21,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:21,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-11-18 19:49:21,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:21,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-11-18 19:49:21,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:21,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-11-18 19:49:21,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:21,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-11-18 19:49:21,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:21,133 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-18 19:49:21,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:49:21,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093552503] [2022-11-18 19:49:21,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093552503] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:49:21,139 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:49:21,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 19:49:21,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110863300] [2022-11-18 19:49:21,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:49:21,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 19:49:21,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:49:21,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 19:49:21,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 19:49:21,190 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) [2022-11-18 19:49:21,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:49:21,223 INFO L93 Difference]: Finished difference Result 128 states and 184 transitions. [2022-11-18 19:49:21,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 19:49:21,225 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 [2022-11-18 19:49:21,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:49:21,234 INFO L225 Difference]: With dead ends: 128 [2022-11-18 19:49:21,234 INFO L226 Difference]: Without dead ends: 63 [2022-11-18 19:49:21,238 INFO L412 NwaCegarLoop]: 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 [2022-11-18 19:49:21,241 INFO L413 NwaCegarLoop]: 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 [2022-11-18 19:49:21,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 19:49:21,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-11-18 19:49:21,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2022-11-18 19:49:21,282 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) [2022-11-18 19:49:21,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 82 transitions. [2022-11-18 19:49:21,286 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 82 transitions. Word has length 68 [2022-11-18 19:49:21,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:49:21,286 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 82 transitions. [2022-11-18 19:49:21,287 INFO L496 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) [2022-11-18 19:49:21,287 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 82 transitions. [2022-11-18 19:49:21,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-18 19:49:21,290 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:49:21,290 INFO L195 NwaCegarLoop]: 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] [2022-11-18 19:49:21,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 19:49:21,291 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:49:21,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:49:21,291 INFO L85 PathProgramCache]: Analyzing trace with hash 900796622, now seen corresponding path program 1 times [2022-11-18 19:49:21,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:49:21,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687057658] [2022-11-18 19:49:21,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:49:21,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:49:21,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:21,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 19:49:21,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:21,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-18 19:49:21,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:21,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-18 19:49:21,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:21,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-11-18 19:49:21,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:21,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-11-18 19:49:21,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:21,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-11-18 19:49:21,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:21,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-11-18 19:49:21,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:21,975 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-18 19:49:21,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:49:21,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687057658] [2022-11-18 19:49:21,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687057658] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:49:21,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376791749] [2022-11-18 19:49:21,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:49:21,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:49:21,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:49:21,980 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:49:22,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 19:49:22,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:22,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 66 conjunts are in the unsatisfiable core [2022-11-18 19:49:22,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:49:22,377 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 19:49:22,396 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 19:49:22,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:49:22,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:49:22,488 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 19:49:22,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:49:22,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:49:22,501 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 19:49:23,786 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 21 proven. 7 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-18 19:49:23,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:49:24,554 INFO L350 Elim1Store]: Elim1 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 738 treesize of output 726 [2022-11-18 19:49:24,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:49:24,783 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 19:49:24,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:49:24,838 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-18 19:49:24,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376791749] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 19:49:24,839 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:49:24,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [6, 10] total 21 [2022-11-18 19:49:24,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265356771] [2022-11-18 19:49:24,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:49:24,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-18 19:49:24,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:49:24,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-18 19:49:24,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=361, Unknown=1, NotChecked=0, Total=420 [2022-11-18 19:49:24,842 INFO L87 Difference]: Start difference. First operand 63 states and 82 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-18 19:49:25,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:49:25,361 INFO L93 Difference]: Finished difference Result 133 states and 186 transitions. [2022-11-18 19:49:25,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 19:49:25,362 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 68 [2022-11-18 19:49:25,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:49:25,365 INFO L225 Difference]: With dead ends: 133 [2022-11-18 19:49:25,365 INFO L226 Difference]: Without dead ends: 84 [2022-11-18 19:49:25,366 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 126 SyntacticMatches, 8 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=74, Invalid=477, Unknown=1, NotChecked=0, Total=552 [2022-11-18 19:49:25,368 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 33 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 19:49:25,368 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 364 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 178 Invalid, 0 Unknown, 46 Unchecked, 0.3s Time] [2022-11-18 19:49:25,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-11-18 19:49:25,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2022-11-18 19:49:25,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 57 states have internal predecessors, (69), 22 states have call successors, (22), 5 states have call predecessors, (22), 6 states have return successors, (25), 20 states have call predecessors, (25), 21 states have call successors, (25) [2022-11-18 19:49:25,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 116 transitions. [2022-11-18 19:49:25,400 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 116 transitions. Word has length 68 [2022-11-18 19:49:25,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:49:25,400 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 116 transitions. [2022-11-18 19:49:25,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-18 19:49:25,403 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 116 transitions. [2022-11-18 19:49:25,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-18 19:49:25,408 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:49:25,408 INFO L195 NwaCegarLoop]: 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] [2022-11-18 19:49:25,420 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-18 19:49:25,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:49:25,614 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:49:25,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:49:25,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1895898232, now seen corresponding path program 1 times [2022-11-18 19:49:25,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:49:25,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849838970] [2022-11-18 19:49:25,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:49:25,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:49:25,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:25,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 19:49:25,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:25,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-18 19:49:25,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:25,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-18 19:49:25,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:25,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-11-18 19:49:25,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:25,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-11-18 19:49:25,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:25,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-11-18 19:49:25,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:25,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-11-18 19:49:25,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:25,990 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-18 19:49:25,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:49:25,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849838970] [2022-11-18 19:49:25,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849838970] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:49:25,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679748203] [2022-11-18 19:49:25,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:49:25,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:49:25,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:49:25,995 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:49:26,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 19:49:26,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:26,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-18 19:49:26,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:49:26,307 INFO L321 Elim1Store]: treesize reduction 30, result has 38.8 percent of original size [2022-11-18 19:49:26,308 INFO L350 Elim1Store]: Elim1 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 78 [2022-11-18 19:49:26,318 INFO L350 Elim1Store]: Elim1 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 10 treesize of output 9 [2022-11-18 19:49:26,362 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 19:49:26,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 26 [2022-11-18 19:49:26,434 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 13 [2022-11-18 19:49:26,465 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 19:49:27,222 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:49:27,222 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:49:27,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679748203] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:49:27,222 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 19:49:27,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [6] total 16 [2022-11-18 19:49:27,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542689437] [2022-11-18 19:49:27,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:49:27,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 19:49:27,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:49:27,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 19:49:27,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2022-11-18 19:49:27,224 INFO L87 Difference]: Start difference. First operand 83 states and 116 transitions. Second operand has 12 states, 11 states have (on average 4.818181818181818) internal successors, (53), 12 states have internal predecessors, (53), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-18 19:49:27,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:49:27,657 INFO L93 Difference]: Finished difference Result 202 states and 280 transitions. [2022-11-18 19:49:27,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-18 19:49:27,658 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.818181818181818) internal successors, (53), 12 states have internal predecessors, (53), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 68 [2022-11-18 19:49:27,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:49:27,665 INFO L225 Difference]: With dead ends: 202 [2022-11-18 19:49:27,666 INFO L226 Difference]: Without dead ends: 153 [2022-11-18 19:49:27,668 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 69 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-11-18 19:49:27,671 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 103 mSDsluCounter, 1002 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 1133 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 219 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 19:49:27,672 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 1133 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 117 Invalid, 0 Unknown, 219 Unchecked, 0.2s Time] [2022-11-18 19:49:27,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-11-18 19:49:27,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 146. [2022-11-18 19:49:27,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 107 states have (on average 1.3738317757009346) internal successors, (147), 109 states have internal predecessors, (147), 27 states have call successors, (27), 11 states have call predecessors, (27), 11 states have return successors, (32), 25 states have call predecessors, (32), 25 states have call successors, (32) [2022-11-18 19:49:27,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 206 transitions. [2022-11-18 19:49:27,722 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 206 transitions. Word has length 68 [2022-11-18 19:49:27,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:49:27,725 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 206 transitions. [2022-11-18 19:49:27,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.818181818181818) internal successors, (53), 12 states have internal predecessors, (53), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-18 19:49:27,725 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 206 transitions. [2022-11-18 19:49:27,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-18 19:49:27,734 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:49:27,734 INFO L195 NwaCegarLoop]: 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] [2022-11-18 19:49:27,740 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-18 19:49:27,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:49:27,940 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:49:27,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:49:27,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1889595974, now seen corresponding path program 1 times [2022-11-18 19:49:27,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:49:27,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323086990] [2022-11-18 19:49:27,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:49:27,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:49:27,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:28,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 19:49:28,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:28,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-18 19:49:28,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:28,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-18 19:49:28,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:28,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-11-18 19:49:28,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:28,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-11-18 19:49:28,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:28,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-11-18 19:49:28,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:28,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-11-18 19:49:28,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:28,269 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-18 19:49:28,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:49:28,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323086990] [2022-11-18 19:49:28,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323086990] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:49:28,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757273909] [2022-11-18 19:49:28,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:49:28,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:49:28,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:49:28,275 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:49:28,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 19:49:28,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:28,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-18 19:49:28,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:49:28,504 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-18 19:49:28,505 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 19:49:28,526 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-18 19:49:28,527 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 19:49:29,493 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 35 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-18 19:49:29,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:49:30,130 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-18 19:49:30,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757273909] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:49:30,130 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:49:30,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 15, 11] total 27 [2022-11-18 19:49:30,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148954714] [2022-11-18 19:49:30,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:49:30,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-18 19:49:30,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:49:30,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-18 19:49:30,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=618, Unknown=0, NotChecked=0, Total=702 [2022-11-18 19:49:30,133 INFO L87 Difference]: Start difference. First operand 146 states and 206 transitions. Second operand has 27 states, 25 states have (on average 3.28) internal successors, (82), 26 states have internal predecessors, (82), 8 states have call successors, (19), 3 states have call predecessors, (19), 7 states have return successors, (19), 7 states have call predecessors, (19), 8 states have call successors, (19) [2022-11-18 19:49:32,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:49:32,153 INFO L93 Difference]: Finished difference Result 460 states and 776 transitions. [2022-11-18 19:49:32,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-18 19:49:32,159 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 3.28) internal successors, (82), 26 states have internal predecessors, (82), 8 states have call successors, (19), 3 states have call predecessors, (19), 7 states have return successors, (19), 7 states have call predecessors, (19), 8 states have call successors, (19) Word has length 68 [2022-11-18 19:49:32,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:49:32,166 INFO L225 Difference]: With dead ends: 460 [2022-11-18 19:49:32,166 INFO L226 Difference]: Without dead ends: 336 [2022-11-18 19:49:32,168 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 136 SyntacticMatches, 4 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 532 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=363, Invalid=2393, Unknown=0, NotChecked=0, Total=2756 [2022-11-18 19:49:32,169 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 357 mSDsluCounter, 1530 mSDsCounter, 0 mSdLazyCounter, 717 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 1669 SdHoareTripleChecker+Invalid, 1250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 363 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-18 19:49:32,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [370 Valid, 1669 Invalid, 1250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 717 Invalid, 0 Unknown, 363 Unchecked, 0.8s Time] [2022-11-18 19:49:32,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2022-11-18 19:49:32,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 247. [2022-11-18 19:49:32,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 186 states have (on average 1.39247311827957) internal successors, (259), 198 states have internal predecessors, (259), 35 states have call successors, (35), 15 states have call predecessors, (35), 25 states have return successors, (91), 33 states have call predecessors, (91), 33 states have call successors, (91) [2022-11-18 19:49:32,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 385 transitions. [2022-11-18 19:49:32,222 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 385 transitions. Word has length 68 [2022-11-18 19:49:32,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:49:32,222 INFO L495 AbstractCegarLoop]: Abstraction has 247 states and 385 transitions. [2022-11-18 19:49:32,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 3.28) internal successors, (82), 26 states have internal predecessors, (82), 8 states have call successors, (19), 3 states have call predecessors, (19), 7 states have return successors, (19), 7 states have call predecessors, (19), 8 states have call successors, (19) [2022-11-18 19:49:32,223 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 385 transitions. [2022-11-18 19:49:32,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-18 19:49:32,225 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:49:32,225 INFO L195 NwaCegarLoop]: 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] [2022-11-18 19:49:32,236 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-18 19:49:32,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:49:32,431 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:49:32,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:49:32,432 INFO L85 PathProgramCache]: Analyzing trace with hash -169373690, now seen corresponding path program 1 times [2022-11-18 19:49:32,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:49:32,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165541751] [2022-11-18 19:49:32,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:49:32,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:49:32,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:32,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 19:49:32,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:32,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-18 19:49:32,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:32,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-18 19:49:32,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:32,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-11-18 19:49:32,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:32,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-18 19:49:32,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:32,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-11-18 19:49:32,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:32,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-11-18 19:49:32,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:32,736 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-18 19:49:32,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:49:32,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165541751] [2022-11-18 19:49:32,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165541751] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:49:32,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491310855] [2022-11-18 19:49:32,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:49:32,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:49:32,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:49:32,739 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:49:32,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 19:49:32,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:32,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-18 19:49:32,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:49:33,005 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-18 19:49:33,005 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:49:33,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491310855] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:49:33,006 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 19:49:33,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 11 [2022-11-18 19:49:33,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064922277] [2022-11-18 19:49:33,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:49:33,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 19:49:33,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:49:33,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 19:49:33,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-11-18 19:49:33,008 INFO L87 Difference]: Start difference. First operand 247 states and 385 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) [2022-11-18 19:49:33,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:49:33,233 INFO L93 Difference]: Finished difference Result 490 states and 780 transitions. [2022-11-18 19:49:33,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 19:49:33,233 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 [2022-11-18 19:49:33,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:49:33,239 INFO L225 Difference]: With dead ends: 490 [2022-11-18 19:49:33,239 INFO L226 Difference]: Without dead ends: 267 [2022-11-18 19:49:33,240 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-11-18 19:49:33,241 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 103 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 19:49:33,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 241 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 19:49:33,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-11-18 19:49:33,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 258. [2022-11-18 19:49:33,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 194 states have (on average 1.3711340206185567) internal successors, (266), 209 states have internal predecessors, (266), 35 states have call successors, (35), 15 states have call predecessors, (35), 28 states have return successors, (108), 33 states have call predecessors, (108), 33 states have call successors, (108) [2022-11-18 19:49:33,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 409 transitions. [2022-11-18 19:49:33,306 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 409 transitions. Word has length 70 [2022-11-18 19:49:33,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:49:33,307 INFO L495 AbstractCegarLoop]: Abstraction has 258 states and 409 transitions. [2022-11-18 19:49:33,307 INFO L496 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) [2022-11-18 19:49:33,307 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 409 transitions. [2022-11-18 19:49:33,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-18 19:49:33,310 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:49:33,311 INFO L195 NwaCegarLoop]: 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] [2022-11-18 19:49:33,324 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-18 19:49:33,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:49:33,517 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:49:33,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:49:33,518 INFO L85 PathProgramCache]: Analyzing trace with hash -782114893, now seen corresponding path program 1 times [2022-11-18 19:49:33,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:49:33,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606216961] [2022-11-18 19:49:33,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:49:33,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:49:33,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:33,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 19:49:33,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:33,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-18 19:49:33,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:33,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-18 19:49:33,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:33,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-11-18 19:49:33,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:33,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-11-18 19:49:33,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:33,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-11-18 19:49:33,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:33,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-11-18 19:49:33,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:33,824 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-18 19:49:33,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:49:33,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606216961] [2022-11-18 19:49:33,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606216961] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:49:33,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110263321] [2022-11-18 19:49:33,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:49:33,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:49:33,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:49:33,827 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:49:33,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-18 19:49:34,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:34,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 19:49:34,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:49:34,104 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-18 19:49:34,105 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:49:34,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110263321] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:49:34,105 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 19:49:34,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 13 [2022-11-18 19:49:34,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060847372] [2022-11-18 19:49:34,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:49:34,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-18 19:49:34,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:49:34,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-18 19:49:34,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2022-11-18 19:49:34,107 INFO L87 Difference]: Start difference. First operand 258 states and 409 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) [2022-11-18 19:49:34,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:49:34,427 INFO L93 Difference]: Finished difference Result 582 states and 956 transitions. [2022-11-18 19:49:34,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 19:49:34,427 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 [2022-11-18 19:49:34,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:49:34,433 INFO L225 Difference]: With dead ends: 582 [2022-11-18 19:49:34,433 INFO L226 Difference]: Without dead ends: 347 [2022-11-18 19:49:34,435 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2022-11-18 19:49:34,438 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 143 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 19:49:34,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 282 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 19:49:34,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2022-11-18 19:49:34,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 269. [2022-11-18 19:49:34,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 205 states have (on average 1.3756097560975609) internal successors, (282), 220 states have internal predecessors, (282), 35 states have call successors, (35), 15 states have call predecessors, (35), 28 states have return successors, (108), 33 states have call predecessors, (108), 33 states have call successors, (108) [2022-11-18 19:49:34,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 425 transitions. [2022-11-18 19:49:34,488 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 425 transitions. Word has length 72 [2022-11-18 19:49:34,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:49:34,488 INFO L495 AbstractCegarLoop]: Abstraction has 269 states and 425 transitions. [2022-11-18 19:49:34,489 INFO L496 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) [2022-11-18 19:49:34,489 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 425 transitions. [2022-11-18 19:49:34,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-18 19:49:34,494 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:49:34,494 INFO L195 NwaCegarLoop]: 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] [2022-11-18 19:49:34,500 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-18 19:49:34,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-18 19:49:34,700 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:49:34,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:49:34,701 INFO L85 PathProgramCache]: Analyzing trace with hash -360254429, now seen corresponding path program 1 times [2022-11-18 19:49:34,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:49:34,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710319852] [2022-11-18 19:49:34,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:49:34,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:49:34,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:34,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 19:49:34,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:34,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-18 19:49:34,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:34,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-18 19:49:34,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:34,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-18 19:49:34,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:34,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-18 19:49:34,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:34,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-18 19:49:35,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:35,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-11-18 19:49:35,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:35,033 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-18 19:49:35,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:49:35,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710319852] [2022-11-18 19:49:35,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710319852] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:49:35,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23623386] [2022-11-18 19:49:35,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:49:35,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:49:35,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:49:35,036 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:49:35,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-18 19:49:35,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:35,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-18 19:49:35,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:49:35,244 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-18 19:49:35,245 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:49:35,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23623386] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:49:35,245 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 19:49:35,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-11-18 19:49:35,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630887039] [2022-11-18 19:49:35,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:49:35,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 19:49:35,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:49:35,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 19:49:35,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:49:35,248 INFO L87 Difference]: Start difference. First operand 269 states and 425 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) [2022-11-18 19:49:35,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:49:35,315 INFO L93 Difference]: Finished difference Result 570 states and 967 transitions. [2022-11-18 19:49:35,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 19:49:35,316 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 [2022-11-18 19:49:35,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:49:35,319 INFO L225 Difference]: With dead ends: 570 [2022-11-18 19:49:35,319 INFO L226 Difference]: Without dead ends: 328 [2022-11-18 19:49:35,322 INFO L412 NwaCegarLoop]: 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 [2022-11-18 19:49:35,322 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 6 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 19:49:35,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 160 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 19:49:35,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2022-11-18 19:49:35,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 276. [2022-11-18 19:49:35,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 212 states have (on average 1.3679245283018868) internal successors, (290), 227 states have internal predecessors, (290), 35 states have call successors, (35), 15 states have call predecessors, (35), 28 states have return successors, (108), 33 states have call predecessors, (108), 33 states have call successors, (108) [2022-11-18 19:49:35,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 433 transitions. [2022-11-18 19:49:35,369 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 433 transitions. Word has length 73 [2022-11-18 19:49:35,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:49:35,370 INFO L495 AbstractCegarLoop]: Abstraction has 276 states and 433 transitions. [2022-11-18 19:49:35,370 INFO L496 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) [2022-11-18 19:49:35,370 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 433 transitions. [2022-11-18 19:49:35,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-18 19:49:35,373 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:49:35,373 INFO L195 NwaCegarLoop]: 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] [2022-11-18 19:49:35,384 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-18 19:49:35,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:49:35,584 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:49:35,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:49:35,584 INFO L85 PathProgramCache]: Analyzing trace with hash -186702901, now seen corresponding path program 1 times [2022-11-18 19:49:35,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:49:35,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048850922] [2022-11-18 19:49:35,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:49:35,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:49:35,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:35,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 19:49:35,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:35,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-18 19:49:35,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:35,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-11-18 19:49:35,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:35,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 19:49:35,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:35,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-18 19:49:35,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:35,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-11-18 19:49:35,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:35,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-11-18 19:49:35,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:35,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-11-18 19:49:35,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:35,962 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-18 19:49:35,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:49:35,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048850922] [2022-11-18 19:49:35,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048850922] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:49:35,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108072047] [2022-11-18 19:49:35,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:49:35,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:49:35,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:49:35,965 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:49:35,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-18 19:49:36,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:36,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-18 19:49:36,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:49:36,277 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-18 19:49:36,278 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 19:49:36,294 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-18 19:49:36,294 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 19:49:37,275 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 28 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-18 19:49:37,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:49:37,941 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-18 19:49:37,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108072047] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:49:37,941 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:49:37,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 14, 10] total 26 [2022-11-18 19:49:37,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028522341] [2022-11-18 19:49:37,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:49:37,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-18 19:49:37,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:49:37,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-18 19:49:37,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2022-11-18 19:49:37,943 INFO L87 Difference]: Start difference. First operand 276 states and 433 transitions. Second operand has 26 states, 25 states have (on average 4.8) internal successors, (120), 23 states have internal predecessors, (120), 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) [2022-11-18 19:49:39,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:49:39,346 INFO L93 Difference]: Finished difference Result 810 states and 1334 transitions. [2022-11-18 19:49:39,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-18 19:49:39,347 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 4.8) internal successors, (120), 23 states have internal predecessors, (120), 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 [2022-11-18 19:49:39,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:49:39,352 INFO L225 Difference]: With dead ends: 810 [2022-11-18 19:49:39,352 INFO L226 Difference]: Without dead ends: 539 [2022-11-18 19:49:39,355 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 167 SyntacticMatches, 7 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=280, Invalid=1976, Unknown=0, NotChecked=0, Total=2256 [2022-11-18 19:49:39,356 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 88 mSDsluCounter, 1312 mSDsCounter, 0 mSdLazyCounter, 606 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 1411 SdHoareTripleChecker+Invalid, 766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 143 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 19:49:39,356 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 1411 Invalid, 766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 606 Invalid, 0 Unknown, 143 Unchecked, 0.6s Time] [2022-11-18 19:49:39,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2022-11-18 19:49:39,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 417. [2022-11-18 19:49:39,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 326 states have (on average 1.352760736196319) internal successors, (441), 352 states have internal predecessors, (441), 43 states have call successors, (43), 23 states have call predecessors, (43), 47 states have return successors, (197), 41 states have call predecessors, (197), 41 states have call successors, (197) [2022-11-18 19:49:39,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 681 transitions. [2022-11-18 19:49:39,420 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 681 transitions. Word has length 83 [2022-11-18 19:49:39,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:49:39,420 INFO L495 AbstractCegarLoop]: Abstraction has 417 states and 681 transitions. [2022-11-18 19:49:39,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 4.8) internal successors, (120), 23 states have internal predecessors, (120), 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) [2022-11-18 19:49:39,421 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 681 transitions. [2022-11-18 19:49:39,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-18 19:49:39,423 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:49:39,424 INFO L195 NwaCegarLoop]: 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] [2022-11-18 19:49:39,434 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-18 19:49:39,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:49:39,630 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:49:39,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:49:39,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1760908594, now seen corresponding path program 1 times [2022-11-18 19:49:39,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:49:39,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432620327] [2022-11-18 19:49:39,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:49:39,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:49:39,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:39,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 19:49:39,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:39,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-18 19:49:39,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:39,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-18 19:49:39,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:40,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 19:49:40,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:40,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-18 19:49:40,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:40,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-11-18 19:49:40,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:40,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-11-18 19:49:40,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:40,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-11-18 19:49:40,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:40,194 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-18 19:49:40,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:49:40,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432620327] [2022-11-18 19:49:40,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432620327] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:49:40,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594261504] [2022-11-18 19:49:40,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:49:40,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:49:40,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:49:40,197 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:49:40,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-18 19:49:40,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:40,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-18 19:49:40,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:49:40,457 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-18 19:49:40,457 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 19:49:40,472 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-18 19:49:40,472 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 19:49:40,874 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 26 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-18 19:49:40,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:49:41,243 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-18 19:49:41,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594261504] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:49:41,243 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:49:41,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 13, 8] total 22 [2022-11-18 19:49:41,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725981785] [2022-11-18 19:49:41,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:49:41,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-18 19:49:41,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:49:41,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-18 19:49:41,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2022-11-18 19:49:41,246 INFO L87 Difference]: Start difference. First operand 417 states and 681 transitions. Second operand has 22 states, 22 states have (on average 4.363636363636363) internal successors, (96), 21 states have internal predecessors, (96), 6 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 5 states have call predecessors, (17), 6 states have call successors, (17) [2022-11-18 19:49:42,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:49:42,855 INFO L93 Difference]: Finished difference Result 1118 states and 2187 transitions. [2022-11-18 19:49:42,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-18 19:49:42,856 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.363636363636363) internal successors, (96), 21 states have internal predecessors, (96), 6 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 5 states have call predecessors, (17), 6 states have call successors, (17) Word has length 83 [2022-11-18 19:49:42,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:49:42,866 INFO L225 Difference]: With dead ends: 1118 [2022-11-18 19:49:42,867 INFO L226 Difference]: Without dead ends: 743 [2022-11-18 19:49:42,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=268, Invalid=1454, Unknown=0, NotChecked=0, Total=1722 [2022-11-18 19:49:42,876 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 310 mSDsluCounter, 758 mSDsCounter, 0 mSdLazyCounter, 695 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 826 SdHoareTripleChecker+Invalid, 774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-18 19:49:42,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [322 Valid, 826 Invalid, 774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 695 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-18 19:49:42,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 743 states. [2022-11-18 19:49:43,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 743 to 443. [2022-11-18 19:49:43,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 349 states have (on average 1.3553008595988538) internal successors, (473), 370 states have internal predecessors, (473), 48 states have call successors, (48), 24 states have call predecessors, (48), 45 states have return successors, (187), 48 states have call predecessors, (187), 46 states have call successors, (187) [2022-11-18 19:49:43,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 708 transitions. [2022-11-18 19:49:43,060 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 708 transitions. Word has length 83 [2022-11-18 19:49:43,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:49:43,061 INFO L495 AbstractCegarLoop]: Abstraction has 443 states and 708 transitions. [2022-11-18 19:49:43,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.363636363636363) internal successors, (96), 21 states have internal predecessors, (96), 6 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 5 states have call predecessors, (17), 6 states have call successors, (17) [2022-11-18 19:49:43,061 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 708 transitions. [2022-11-18 19:49:43,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-11-18 19:49:43,064 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:49:43,064 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:49:43,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-18 19:49:43,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-18 19:49:43,270 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:49:43,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:49:43,271 INFO L85 PathProgramCache]: Analyzing trace with hash -2118634058, now seen corresponding path program 1 times [2022-11-18 19:49:43,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:49:43,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620805882] [2022-11-18 19:49:43,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:49:43,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:49:43,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:43,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 19:49:43,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:43,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-18 19:49:43,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:43,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-11-18 19:49:43,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:43,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 19:49:43,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:43,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-18 19:49:43,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:43,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-18 19:49:43,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:43,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-11-18 19:49:43,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:43,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-11-18 19:49:43,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:43,492 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-18 19:49:43,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:49:43,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620805882] [2022-11-18 19:49:43,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620805882] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:49:43,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298700259] [2022-11-18 19:49:43,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:49:43,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:49:43,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:49:43,494 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:49:43,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-18 19:49:43,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:43,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-18 19:49:43,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:49:43,720 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-18 19:49:43,720 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:49:43,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298700259] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:49:43,720 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 19:49:43,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2022-11-18 19:49:43,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518991213] [2022-11-18 19:49:43,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:49:43,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 19:49:43,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:49:43,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 19:49:43,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 19:49:43,722 INFO L87 Difference]: Start difference. First operand 443 states and 708 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) [2022-11-18 19:49:43,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:49:43,801 INFO L93 Difference]: Finished difference Result 824 states and 1364 transitions. [2022-11-18 19:49:43,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 19:49:43,802 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 85 [2022-11-18 19:49:43,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:49:43,808 INFO L225 Difference]: With dead ends: 824 [2022-11-18 19:49:43,808 INFO L226 Difference]: Without dead ends: 422 [2022-11-18 19:49:43,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:49:43,812 INFO L413 NwaCegarLoop]: 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 [2022-11-18 19:49:43,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 244 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 19:49:43,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2022-11-18 19:49:43,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 422. [2022-11-18 19:49:43,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 328 states have (on average 1.329268292682927) internal successors, (436), 349 states have internal predecessors, (436), 48 states have call successors, (48), 24 states have call predecessors, (48), 45 states have return successors, (187), 48 states have call predecessors, (187), 46 states have call successors, (187) [2022-11-18 19:49:43,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 671 transitions. [2022-11-18 19:49:43,878 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 671 transitions. Word has length 85 [2022-11-18 19:49:43,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:49:43,878 INFO L495 AbstractCegarLoop]: Abstraction has 422 states and 671 transitions. [2022-11-18 19:49:43,878 INFO L496 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) [2022-11-18 19:49:43,878 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 671 transitions. [2022-11-18 19:49:43,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-11-18 19:49:43,881 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:49:43,881 INFO L195 NwaCegarLoop]: 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, 1, 1] [2022-11-18 19:49:43,893 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-18 19:49:44,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:49:44,088 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:49:44,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:49:44,089 INFO L85 PathProgramCache]: Analyzing trace with hash -157059400, now seen corresponding path program 1 times [2022-11-18 19:49:44,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:49:44,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988007872] [2022-11-18 19:49:44,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:49:44,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:49:44,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:44,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 19:49:44,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:44,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-18 19:49:44,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:44,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-11-18 19:49:44,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:44,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 19:49:44,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:44,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-18 19:49:44,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:44,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-18 19:49:44,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:44,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-11-18 19:49:44,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:44,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-11-18 19:49:44,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:44,307 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-18 19:49:44,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:49:44,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988007872] [2022-11-18 19:49:44,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988007872] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:49:44,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868906630] [2022-11-18 19:49:44,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:49:44,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:49:44,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:49:44,309 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:49:44,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-18 19:49:44,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:44,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-18 19:49:44,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:49:44,549 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-18 19:49:44,549 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:49:44,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868906630] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:49:44,550 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 19:49:44,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2022-11-18 19:49:44,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590085495] [2022-11-18 19:49:44,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:49:44,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 19:49:44,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:49:44,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 19:49:44,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 19:49:44,552 INFO L87 Difference]: Start difference. First operand 422 states and 671 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 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) [2022-11-18 19:49:44,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:49:44,599 INFO L93 Difference]: Finished difference Result 637 states and 1079 transitions. [2022-11-18 19:49:44,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 19:49:44,599 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 85 [2022-11-18 19:49:44,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:49:44,602 INFO L225 Difference]: With dead ends: 637 [2022-11-18 19:49:44,602 INFO L226 Difference]: Without dead ends: 240 [2022-11-18 19:49:44,605 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:49:44,606 INFO L413 NwaCegarLoop]: 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 [2022-11-18 19:49:44,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 235 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 19:49:44,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-11-18 19:49:44,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 232. [2022-11-18 19:49:44,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 174 states have (on average 1.2126436781609196) internal successors, (211), 181 states have internal predecessors, (211), 34 states have call successors, (34), 18 states have call predecessors, (34), 23 states have return successors, (73), 32 states have call predecessors, (73), 32 states have call successors, (73) [2022-11-18 19:49:44,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 318 transitions. [2022-11-18 19:49:44,637 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 318 transitions. Word has length 85 [2022-11-18 19:49:44,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:49:44,638 INFO L495 AbstractCegarLoop]: Abstraction has 232 states and 318 transitions. [2022-11-18 19:49:44,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 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) [2022-11-18 19:49:44,638 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 318 transitions. [2022-11-18 19:49:44,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-18 19:49:44,640 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:49:44,640 INFO L195 NwaCegarLoop]: 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] [2022-11-18 19:49:44,651 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-18 19:49:44,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-18 19:49:44,846 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:49:44,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:49:44,847 INFO L85 PathProgramCache]: Analyzing trace with hash 806524548, now seen corresponding path program 1 times [2022-11-18 19:49:44,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:49:44,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173488554] [2022-11-18 19:49:44,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:49:44,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:49:44,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:45,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 19:49:45,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:45,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-18 19:49:45,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:45,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-11-18 19:49:45,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:45,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 19:49:45,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:45,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-11-18 19:49:45,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:45,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-11-18 19:49:45,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:45,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-11-18 19:49:45,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:45,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-11-18 19:49:45,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:45,160 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-18 19:49:45,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:49:45,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173488554] [2022-11-18 19:49:45,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173488554] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:49:45,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742997802] [2022-11-18 19:49:45,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:49:45,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:49:45,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:49:45,162 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:49:45,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-18 19:49:45,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:45,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 63 conjunts are in the unsatisfiable core [2022-11-18 19:49:45,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:49:45,525 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 19:49:45,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:49:45,532 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 19:49:45,605 INFO L321 Elim1Store]: treesize reduction 38, result has 22.4 percent of original size [2022-11-18 19:49:45,606 INFO L350 Elim1Store]: Elim1 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 94 [2022-11-18 19:49:45,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:49:45,614 INFO L350 Elim1Store]: Elim1 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 80 treesize of output 68 [2022-11-18 19:49:45,623 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 19:49:45,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:49:45,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 23 [2022-11-18 19:49:45,665 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 19:49:47,691 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_31| Int)) (<= (+ 2 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_31|) 0)) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_31|)) is different from true [2022-11-18 19:50:00,084 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-18 19:50:00,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:50:04,675 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:50:04,675 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 19:50:04,699 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:50:04,699 INFO L350 Elim1Store]: Elim1 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 145 treesize of output 149 [2022-11-18 19:50:04,708 INFO L350 Elim1Store]: Elim1 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 144 treesize of output 140 [2022-11-18 19:50:04,723 INFO L350 Elim1Store]: Elim1 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 140 treesize of output 138 [2022-11-18 19:50:04,818 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 19:50:04,868 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-18 19:50:04,874 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 19:50:04,896 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:50:04,897 INFO L350 Elim1Store]: Elim1 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 97 treesize of output 95 [2022-11-18 19:50:05,117 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-18 19:50:05,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742997802] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:50:05,117 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:50:05,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 13, 11] total 26 [2022-11-18 19:50:05,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588633640] [2022-11-18 19:50:05,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:50:05,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-18 19:50:05,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:50:05,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-18 19:50:05,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=521, Unknown=13, NotChecked=46, Total=650 [2022-11-18 19:50:05,119 INFO L87 Difference]: Start difference. First operand 232 states and 318 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) [2022-11-18 19:50:12,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:50:12,408 INFO L93 Difference]: Finished difference Result 468 states and 637 transitions. [2022-11-18 19:50:12,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-18 19:50:12,409 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 [2022-11-18 19:50:12,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:50:12,410 INFO L225 Difference]: With dead ends: 468 [2022-11-18 19:50:12,411 INFO L226 Difference]: Without dead ends: 220 [2022-11-18 19:50:12,412 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 25.2s TimeCoverageRelationStatistics Valid=148, Invalid=1174, Unknown=14, NotChecked=70, Total=1406 [2022-11-18 19:50:12,413 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 133 mSDsluCounter, 1257 mSDsCounter, 0 mSdLazyCounter, 576 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 1353 SdHoareTripleChecker+Invalid, 1251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 627 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-18 19:50:12,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 1353 Invalid, 1251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 576 Invalid, 0 Unknown, 627 Unchecked, 0.7s Time] [2022-11-18 19:50:12,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-11-18 19:50:12,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 194. [2022-11-18 19:50:12,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 149 states have (on average 1.1946308724832215) internal successors, (178), 153 states have internal predecessors, (178), 27 states have call successors, (27), 15 states have call predecessors, (27), 17 states have return successors, (44), 25 states have call predecessors, (44), 25 states have call successors, (44) [2022-11-18 19:50:12,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 249 transitions. [2022-11-18 19:50:12,441 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 249 transitions. Word has length 86 [2022-11-18 19:50:12,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:50:12,441 INFO L495 AbstractCegarLoop]: Abstraction has 194 states and 249 transitions. [2022-11-18 19:50:12,442 INFO L496 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) [2022-11-18 19:50:12,442 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 249 transitions. [2022-11-18 19:50:12,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-11-18 19:50:12,443 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:50:12,443 INFO L195 NwaCegarLoop]: 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] [2022-11-18 19:50:12,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-18 19:50:12,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-18 19:50:12,663 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:50:12,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:50:12,665 INFO L85 PathProgramCache]: Analyzing trace with hash -216003458, now seen corresponding path program 1 times [2022-11-18 19:50:12,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:50:12,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832530535] [2022-11-18 19:50:12,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:50:12,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:50:12,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:12,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 19:50:12,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:12,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-18 19:50:12,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:12,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-11-18 19:50:12,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:12,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 19:50:12,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:12,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-11-18 19:50:12,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:13,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-11-18 19:50:13,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:13,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-11-18 19:50:13,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:13,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-11-18 19:50:13,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:13,089 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-18 19:50:13,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:50:13,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832530535] [2022-11-18 19:50:13,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832530535] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:50:13,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632925590] [2022-11-18 19:50:13,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:50:13,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:50:13,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:50:13,092 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:50:13,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-18 19:50:13,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:13,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-18 19:50:13,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:50:13,482 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-18 19:50:13,483 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:50:13,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632925590] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:50:13,483 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 19:50:13,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 13 [2022-11-18 19:50:13,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873977192] [2022-11-18 19:50:13,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:50:13,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-18 19:50:13,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:50:13,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-18 19:50:13,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2022-11-18 19:50:13,484 INFO L87 Difference]: Start difference. First operand 194 states and 249 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) [2022-11-18 19:50:13,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:50:13,749 INFO L93 Difference]: Finished difference Result 299 states and 387 transitions. [2022-11-18 19:50:13,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 19:50:13,750 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 [2022-11-18 19:50:13,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:50:13,752 INFO L225 Difference]: With dead ends: 299 [2022-11-18 19:50:13,752 INFO L226 Difference]: Without dead ends: 191 [2022-11-18 19:50:13,753 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2022-11-18 19:50:13,753 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 105 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 19:50:13,754 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 280 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 19:50:13,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-11-18 19:50:13,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2022-11-18 19:50:13,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 147 states have (on average 1.183673469387755) internal successors, (174), 150 states have internal predecessors, (174), 27 states have call successors, (27), 15 states have call predecessors, (27), 16 states have return successors, (40), 25 states have call predecessors, (40), 25 states have call successors, (40) [2022-11-18 19:50:13,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 241 transitions. [2022-11-18 19:50:13,779 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 241 transitions. Word has length 90 [2022-11-18 19:50:13,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:50:13,780 INFO L495 AbstractCegarLoop]: Abstraction has 191 states and 241 transitions. [2022-11-18 19:50:13,780 INFO L496 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) [2022-11-18 19:50:13,780 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 241 transitions. [2022-11-18 19:50:13,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-18 19:50:13,782 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:50:13,782 INFO L195 NwaCegarLoop]: 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] [2022-11-18 19:50:13,795 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-11-18 19:50:13,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-18 19:50:13,988 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:50:13,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:50:13,989 INFO L85 PathProgramCache]: Analyzing trace with hash -104570939, now seen corresponding path program 1 times [2022-11-18 19:50:13,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:50:13,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889932211] [2022-11-18 19:50:13,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:50:13,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:50:14,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:14,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 19:50:14,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:14,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-18 19:50:14,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:14,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-11-18 19:50:14,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:14,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 19:50:14,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:14,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-11-18 19:50:14,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:14,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-11-18 19:50:14,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:14,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 19:50:14,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:14,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-11-18 19:50:14,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:14,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-11-18 19:50:14,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:14,389 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-18 19:50:14,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:50:14,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889932211] [2022-11-18 19:50:14,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889932211] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:50:14,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035352123] [2022-11-18 19:50:14,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:50:14,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:50:14,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:50:14,392 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:50:14,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-18 19:50:14,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:14,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 60 conjunts are in the unsatisfiable core [2022-11-18 19:50:14,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:50:14,802 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 19:50:14,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:50:14,808 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 19:50:14,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:50:14,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:50:14,896 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-18 19:50:14,896 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 19:50:14,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:50:14,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:50:14,980 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 19:50:15,800 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 45 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-18 19:50:15,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:50:16,365 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:50:16,366 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 19:50:16,383 WARN L837 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| Int) (v_arrayElimArr_8 (Array Int Int)) (v_ArrVal_1377 Int) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_15| Int) (v_ArrVal_1370 (Array Int Int))) (or (not (= (+ |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.offset| 16) (select (select (let ((.cse0 (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_1370) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_15| v_arrayElimArr_8))) (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_1377))) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.offset|))) (not (< |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_15| |c_#StackHeapBarrier|)) (not (= (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 16) (select v_arrayElimArr_8 |ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset|))))) is different from false [2022-11-18 19:50:16,421 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:50:16,422 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 19:50:16,460 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:50:16,462 INFO L350 Elim1Store]: Elim1 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 6987 treesize of output 6909 [2022-11-18 19:50:16,547 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:50:16,548 INFO L350 Elim1Store]: Elim1 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 8807 treesize of output 8389 [2022-11-18 19:50:16,712 INFO L350 Elim1Store]: Elim1 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 8854 treesize of output 8706 [2022-11-18 19:50:17,705 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 19:50:17,722 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:50:17,722 INFO L350 Elim1Store]: Elim1 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 72 treesize of output 72 [2022-11-18 19:50:17,813 INFO L350 Elim1Store]: Elim1 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 61 treesize of output 57 [2022-11-18 19:50:17,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 46 [2022-11-18 19:50:18,012 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 32 trivial. 3 not checked. [2022-11-18 19:50:18,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035352123] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:50:18,013 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:50:18,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 13, 12] total 28 [2022-11-18 19:50:18,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511859790] [2022-11-18 19:50:18,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:50:18,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-18 19:50:18,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:50:18,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-18 19:50:18,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=619, Unknown=1, NotChecked=50, Total=756 [2022-11-18 19:50:18,016 INFO L87 Difference]: Start difference. First operand 191 states and 241 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) [2022-11-18 19:50:19,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:50:19,335 INFO L93 Difference]: Finished difference Result 366 states and 471 transitions. [2022-11-18 19:50:19,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-18 19:50:19,336 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 [2022-11-18 19:50:19,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:50:19,338 INFO L225 Difference]: With dead ends: 366 [2022-11-18 19:50:19,338 INFO L226 Difference]: Without dead ends: 228 [2022-11-18 19:50:19,339 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 200 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=165, Invalid=1320, Unknown=1, NotChecked=74, Total=1560 [2022-11-18 19:50:19,340 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 86 mSDsluCounter, 1101 mSDsCounter, 0 mSdLazyCounter, 606 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 1188 SdHoareTripleChecker+Invalid, 909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 253 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-18 19:50:19,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 1188 Invalid, 909 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 606 Invalid, 0 Unknown, 253 Unchecked, 0.8s Time] [2022-11-18 19:50:19,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2022-11-18 19:50:19,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 221. [2022-11-18 19:50:19,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 175 states have (on average 1.1828571428571428) internal successors, (207), 176 states have internal predecessors, (207), 28 states have call successors, (28), 17 states have call predecessors, (28), 17 states have return successors, (42), 27 states have call predecessors, (42), 26 states have call successors, (42) [2022-11-18 19:50:19,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 277 transitions. [2022-11-18 19:50:19,372 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 277 transitions. Word has length 101 [2022-11-18 19:50:19,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:50:19,372 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 277 transitions. [2022-11-18 19:50:19,373 INFO L496 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) [2022-11-18 19:50:19,373 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 277 transitions. [2022-11-18 19:50:19,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-11-18 19:50:19,374 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:50:19,375 INFO L195 NwaCegarLoop]: 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] [2022-11-18 19:50:19,383 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-18 19:50:19,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-18 19:50:19,584 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:50:19,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:50:19,584 INFO L85 PathProgramCache]: Analyzing trace with hash 2047426688, now seen corresponding path program 1 times [2022-11-18 19:50:19,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:50:19,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950089461] [2022-11-18 19:50:19,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:50:19,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:50:19,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:20,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 19:50:20,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:20,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-18 19:50:20,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:20,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-18 19:50:20,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:20,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 19:50:20,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:20,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-11-18 19:50:20,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:20,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-11-18 19:50:20,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:20,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 19:50:20,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:20,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-11-18 19:50:20,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:20,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-11-18 19:50:20,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:20,563 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-18 19:50:20,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:50:20,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950089461] [2022-11-18 19:50:20,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950089461] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:50:20,563 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:50:20,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-18 19:50:20,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132027075] [2022-11-18 19:50:20,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:50:20,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 19:50:20,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:50:20,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 19:50:20,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-11-18 19:50:20,565 INFO L87 Difference]: Start difference. First operand 221 states and 277 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) [2022-11-18 19:50:20,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:50:20,955 INFO L93 Difference]: Finished difference Result 317 states and 402 transitions. [2022-11-18 19:50:20,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-18 19:50:20,956 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 [2022-11-18 19:50:20,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:50:20,957 INFO L225 Difference]: With dead ends: 317 [2022-11-18 19:50:20,958 INFO L226 Difference]: Without dead ends: 221 [2022-11-18 19:50:20,960 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-11-18 19:50:20,961 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 57 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 19:50:20,962 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 372 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 19:50:20,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2022-11-18 19:50:20,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 219. [2022-11-18 19:50:20,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 173 states have (on average 1.1791907514450868) internal successors, (204), 174 states have internal predecessors, (204), 28 states have call successors, (28), 17 states have call predecessors, (28), 17 states have return successors, (42), 27 states have call predecessors, (42), 26 states have call successors, (42) [2022-11-18 19:50:20,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 274 transitions. [2022-11-18 19:50:20,996 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 274 transitions. Word has length 100 [2022-11-18 19:50:20,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:50:20,997 INFO L495 AbstractCegarLoop]: Abstraction has 219 states and 274 transitions. [2022-11-18 19:50:20,997 INFO L496 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) [2022-11-18 19:50:20,997 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 274 transitions. [2022-11-18 19:50:20,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-11-18 19:50:20,999 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:50:21,000 INFO L195 NwaCegarLoop]: 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] [2022-11-18 19:50:21,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-18 19:50:21,000 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:50:21,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:50:21,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1654399678, now seen corresponding path program 1 times [2022-11-18 19:50:21,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:50:21,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610076316] [2022-11-18 19:50:21,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:50:21,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:50:21,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:21,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 19:50:21,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:21,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-18 19:50:21,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:21,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-18 19:50:21,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:21,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 19:50:21,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:21,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-11-18 19:50:21,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:21,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-11-18 19:50:21,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:22,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 19:50:22,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:22,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-11-18 19:50:22,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:22,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-11-18 19:50:22,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:22,524 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 7 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-18 19:50:22,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:50:22,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610076316] [2022-11-18 19:50:22,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610076316] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:50:22,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582269905] [2022-11-18 19:50:22,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:50:22,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:50:22,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:50:22,527 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:50:22,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-18 19:50:22,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:22,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-18 19:50:22,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:50:22,868 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-18 19:50:22,868 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 19:50:22,900 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-18 19:50:22,900 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 19:50:24,386 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 32 proven. 28 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-18 19:50:24,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:50:25,064 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 10 proven. 33 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-18 19:50:25,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582269905] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:50:25,065 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:50:25,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16, 12] total 30 [2022-11-18 19:50:25,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829921027] [2022-11-18 19:50:25,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:50:25,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-18 19:50:25,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:50:25,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-18 19:50:25,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=752, Unknown=0, NotChecked=0, Total=870 [2022-11-18 19:50:25,067 INFO L87 Difference]: Start difference. First operand 219 states and 274 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) [2022-11-18 19:50:26,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:50:26,543 INFO L93 Difference]: Finished difference Result 389 states and 486 transitions. [2022-11-18 19:50:26,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-18 19:50:26,544 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 [2022-11-18 19:50:26,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:50:26,546 INFO L225 Difference]: With dead ends: 389 [2022-11-18 19:50:26,546 INFO L226 Difference]: Without dead ends: 289 [2022-11-18 19:50:26,547 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 202 SyntacticMatches, 7 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=345, Invalid=1817, Unknown=0, NotChecked=0, Total=2162 [2022-11-18 19:50:26,547 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 178 mSDsluCounter, 1046 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 1129 SdHoareTripleChecker+Invalid, 817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 329 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 19:50:26,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 1129 Invalid, 817 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 460 Invalid, 0 Unknown, 329 Unchecked, 0.5s Time] [2022-11-18 19:50:26,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2022-11-18 19:50:26,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 269. [2022-11-18 19:50:26,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 215 states have (on average 1.2) internal successors, (258), 217 states have internal predecessors, (258), 30 states have call successors, (30), 22 states have call predecessors, (30), 23 states have return successors, (45), 29 states have call predecessors, (45), 28 states have call successors, (45) [2022-11-18 19:50:26,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 333 transitions. [2022-11-18 19:50:26,603 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 333 transitions. Word has length 100 [2022-11-18 19:50:26,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:50:26,604 INFO L495 AbstractCegarLoop]: Abstraction has 269 states and 333 transitions. [2022-11-18 19:50:26,604 INFO L496 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) [2022-11-18 19:50:26,604 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 333 transitions. [2022-11-18 19:50:26,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-11-18 19:50:26,606 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:50:26,606 INFO L195 NwaCegarLoop]: 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] [2022-11-18 19:50:26,613 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-18 19:50:26,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-18 19:50:26,812 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:50:26,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:50:26,813 INFO L85 PathProgramCache]: Analyzing trace with hash 1912565116, now seen corresponding path program 1 times [2022-11-18 19:50:26,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:50:26,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526828797] [2022-11-18 19:50:26,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:50:26,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:50:26,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:27,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 19:50:27,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:27,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-18 19:50:27,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:27,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-18 19:50:27,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:27,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 19:50:27,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:27,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-11-18 19:50:27,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:27,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-11-18 19:50:27,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:27,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 19:50:27,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:27,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-11-18 19:50:27,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:27,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-11-18 19:50:27,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:27,645 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 10 proven. 34 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-18 19:50:27,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:50:27,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526828797] [2022-11-18 19:50:27,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526828797] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:50:27,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060374034] [2022-11-18 19:50:27,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:50:27,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:50:27,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:50:27,647 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:50:27,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-18 19:50:27,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:27,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 54 conjunts are in the unsatisfiable core [2022-11-18 19:50:27,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:50:28,029 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-18 19:50:28,030 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 19:50:29,307 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 34 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-18 19:50:29,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:50:29,976 INFO L350 Elim1Store]: Elim1 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 236 treesize of output 220 [2022-11-18 19:50:29,981 INFO L350 Elim1Store]: Elim1 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 220 treesize of output 204 [2022-11-18 19:50:29,985 INFO L350 Elim1Store]: Elim1 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 204 treesize of output 196 [2022-11-18 19:50:30,134 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 10 proven. 35 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-18 19:50:30,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060374034] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:50:30,134 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:50:30,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 16] total 34 [2022-11-18 19:50:30,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17691228] [2022-11-18 19:50:30,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:50:30,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-18 19:50:30,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:50:30,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-18 19:50:30,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=998, Unknown=0, NotChecked=0, Total=1122 [2022-11-18 19:50:30,137 INFO L87 Difference]: Start difference. First operand 269 states and 333 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, (21), 12 states have call predecessors, (21), 13 states have call successors, (21) [2022-11-18 19:50:32,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:50:32,077 INFO L93 Difference]: Finished difference Result 594 states and 741 transitions. [2022-11-18 19:50:32,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-18 19:50:32,078 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, (21), 12 states have call predecessors, (21), 13 states have call successors, (21) Word has length 100 [2022-11-18 19:50:32,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:50:32,081 INFO L225 Difference]: With dead ends: 594 [2022-11-18 19:50:32,081 INFO L226 Difference]: Without dead ends: 510 [2022-11-18 19:50:32,083 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 206 SyntacticMatches, 7 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 852 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=394, Invalid=3266, Unknown=0, NotChecked=0, Total=3660 [2022-11-18 19:50:32,084 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 349 mSDsluCounter, 1502 mSDsCounter, 0 mSdLazyCounter, 941 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 1614 SdHoareTripleChecker+Invalid, 1293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 941 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 237 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-18 19:50:32,084 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [360 Valid, 1614 Invalid, 1293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 941 Invalid, 0 Unknown, 237 Unchecked, 1.0s Time] [2022-11-18 19:50:32,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2022-11-18 19:50:32,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 401. [2022-11-18 19:50:32,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 323 states have (on average 1.2105263157894737) internal successors, (391), 326 states have internal predecessors, (391), 43 states have call successors, (43), 32 states have call predecessors, (43), 34 states have return successors, (62), 42 states have call predecessors, (62), 40 states have call successors, (62) [2022-11-18 19:50:32,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 496 transitions. [2022-11-18 19:50:32,155 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 496 transitions. Word has length 100 [2022-11-18 19:50:32,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:50:32,156 INFO L495 AbstractCegarLoop]: Abstraction has 401 states and 496 transitions. [2022-11-18 19:50:32,156 INFO L496 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, (21), 12 states have call predecessors, (21), 13 states have call successors, (21) [2022-11-18 19:50:32,156 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 496 transitions. [2022-11-18 19:50:32,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-11-18 19:50:32,157 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:50:32,158 INFO L195 NwaCegarLoop]: 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] [2022-11-18 19:50:32,164 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-18 19:50:32,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:50:32,365 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:50:32,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:50:32,365 INFO L85 PathProgramCache]: Analyzing trace with hash 901447866, now seen corresponding path program 1 times [2022-11-18 19:50:32,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:50:32,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773927304] [2022-11-18 19:50:32,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:50:32,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:50:32,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:32,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 19:50:32,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:32,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-18 19:50:32,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:32,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-18 19:50:32,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:32,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 19:50:32,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:32,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-11-18 19:50:32,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:32,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-11-18 19:50:32,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:32,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 19:50:32,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:32,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-11-18 19:50:32,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:32,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-11-18 19:50:32,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:32,691 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-18 19:50:32,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:50:32,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773927304] [2022-11-18 19:50:32,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773927304] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:50:32,692 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:50:32,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-18 19:50:32,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340043253] [2022-11-18 19:50:32,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:50:32,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 19:50:32,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:50:32,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 19:50:32,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-18 19:50:32,694 INFO L87 Difference]: Start difference. First operand 401 states and 496 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) [2022-11-18 19:50:32,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:50:32,877 INFO L93 Difference]: Finished difference Result 859 states and 1083 transitions. [2022-11-18 19:50:32,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 19:50:32,878 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 [2022-11-18 19:50:32,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:50:32,880 INFO L225 Difference]: With dead ends: 859 [2022-11-18 19:50:32,881 INFO L226 Difference]: Without dead ends: 372 [2022-11-18 19:50:32,882 INFO L412 NwaCegarLoop]: 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 [2022-11-18 19:50:32,883 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 32 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 19:50:32,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 383 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 19:50:32,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2022-11-18 19:50:32,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 366. [2022-11-18 19:50:32,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 290 states have (on average 1.1793103448275861) internal successors, (342), 294 states have internal predecessors, (342), 43 states have call successors, (43), 29 states have call predecessors, (43), 32 states have return successors, (58), 42 states have call predecessors, (58), 40 states have call successors, (58) [2022-11-18 19:50:32,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 443 transitions. [2022-11-18 19:50:32,950 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 443 transitions. Word has length 100 [2022-11-18 19:50:32,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:50:32,950 INFO L495 AbstractCegarLoop]: Abstraction has 366 states and 443 transitions. [2022-11-18 19:50:32,951 INFO L496 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) [2022-11-18 19:50:32,951 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 443 transitions. [2022-11-18 19:50:32,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-18 19:50:32,952 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:50:32,952 INFO L195 NwaCegarLoop]: 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] [2022-11-18 19:50:32,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-18 19:50:32,953 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:50:32,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:50:32,953 INFO L85 PathProgramCache]: Analyzing trace with hash -2065682137, now seen corresponding path program 1 times [2022-11-18 19:50:32,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:50:32,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546672914] [2022-11-18 19:50:32,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:50:32,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:50:33,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:34,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 19:50:34,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:34,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-18 19:50:34,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:34,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-18 19:50:34,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:34,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 19:50:34,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:34,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-11-18 19:50:34,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:34,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-11-18 19:50:34,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:35,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 19:50:35,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:35,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-11-18 19:50:35,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:35,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-11-18 19:50:35,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:35,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 19:50:35,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:36,130 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 12 proven. 36 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-11-18 19:50:36,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:50:36,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546672914] [2022-11-18 19:50:36,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546672914] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:50:36,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980199314] [2022-11-18 19:50:36,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:50:36,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:50:36,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:50:36,132 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:50:36,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-18 19:50:36,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:36,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 131 conjunts are in the unsatisfiable core [2022-11-18 19:50:36,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:50:36,509 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 19:50:36,513 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 19:50:36,519 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 19:50:36,523 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 19:50:41,102 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 54 proven. 40 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-18 19:50:41,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:50:52,980 WARN L233 SmtUtils]: Spent 10.04s on a formula simplification that was a NOOP. DAG size: 26 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 19:51:03,191 WARN L233 SmtUtils]: Spent 10.05s on a formula simplification that was a NOOP. DAG size: 29 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 19:51:05,036 INFO L321 Elim1Store]: treesize reduction 8, result has 95.2 percent of original size [2022-11-18 19:51:05,037 INFO L350 Elim1Store]: Elim1 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 2864 [2022-11-18 19:51:05,491 INFO L321 Elim1Store]: treesize reduction 30, result has 85.8 percent of original size [2022-11-18 19:51:05,493 INFO L350 Elim1Store]: Elim1 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 23786 treesize of output 22250 [2022-11-18 19:51:05,890 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:51:05,892 INFO L350 Elim1Store]: Elim1 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 22070 treesize of output 21020 [2022-11-18 19:51:06,646 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:51:06,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 24129 treesize of output 23407 [2022-11-18 19:51:07,852 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:51:07,854 INFO L350 Elim1Store]: Elim1 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 28562 treesize of output 27372 [2022-11-18 19:51:08,955 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:51:08,957 INFO L350 Elim1Store]: Elim1 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 26802 treesize of output 26315 [2022-11-18 19:51:44,846 WARN L319 FreeRefinementEngine]: Global settings require throwing the following exception [2022-11-18 19:51:44,852 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-18 19:51:45,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:51:45,047 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: Maybe an infinite loop at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:130) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:345) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:188) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:65) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:295) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:281) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminate(PartialQuantifierElimination.java:90) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:238) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:420) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeBackwardSequence(IterativePredicateTransformer.java:399) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeWeakestPreconditionSequence(IterativePredicateTransformer.java:271) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:342) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-18 19:51:45,052 INFO L158 Benchmark]: Toolchain (without parser) took 147968.11ms. Allocated memory was 136.3MB in the beginning and 1.2GB in the end (delta: 1.0GB). Free memory was 97.3MB in the beginning and 786.6MB in the end (delta: -689.3MB). Peak memory consumption was 728.7MB. Max. memory is 16.1GB. [2022-11-18 19:51:45,052 INFO L158 Benchmark]: CDTParser took 0.27ms. Allocated memory is still 90.2MB. Free memory was 49.4MB in the beginning and 49.4MB in the end (delta: 43.0kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-18 19:51:45,052 INFO L158 Benchmark]: CACSL2BoogieTranslator took 2244.58ms. Allocated memory is still 136.3MB. Free memory was 97.1MB in the beginning and 56.6MB in the end (delta: 40.4MB). Peak memory consumption was 61.8MB. Max. memory is 16.1GB. [2022-11-18 19:51:45,052 INFO L158 Benchmark]: Boogie Procedure Inliner took 183.19ms. Allocated memory is still 136.3MB. Free memory was 56.6MB in the beginning and 93.6MB in the end (delta: -37.0MB). Peak memory consumption was 10.4MB. Max. memory is 16.1GB. [2022-11-18 19:51:45,052 INFO L158 Benchmark]: Boogie Preprocessor took 83.36ms. Allocated memory is still 136.3MB. Free memory was 93.6MB in the beginning and 90.8MB in the end (delta: 2.8MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-18 19:51:45,053 INFO L158 Benchmark]: RCFGBuilder took 701.19ms. Allocated memory is still 136.3MB. Free memory was 90.8MB in the beginning and 67.0MB in the end (delta: 23.8MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. [2022-11-18 19:51:45,053 INFO L158 Benchmark]: TraceAbstraction took 144745.19ms. Allocated memory was 136.3MB in the beginning and 1.2GB in the end (delta: 1.0GB). Free memory was 66.4MB in the beginning and 786.6MB in the end (delta: -720.2MB). Peak memory consumption was 698.5MB. Max. memory is 16.1GB. [2022-11-18 19:51:45,059 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27ms. Allocated memory is still 90.2MB. Free memory was 49.4MB in the beginning and 49.4MB in the end (delta: 43.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 2244.58ms. Allocated memory is still 136.3MB. Free memory was 97.1MB in the beginning and 56.6MB in the end (delta: 40.4MB). Peak memory consumption was 61.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 183.19ms. Allocated memory is still 136.3MB. Free memory was 56.6MB in the beginning and 93.6MB in the end (delta: -37.0MB). Peak memory consumption was 10.4MB. Max. memory is 16.1GB. * Boogie Preprocessor took 83.36ms. Allocated memory is still 136.3MB. Free memory was 93.6MB in the beginning and 90.8MB in the end (delta: 2.8MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 701.19ms. Allocated memory is still 136.3MB. Free memory was 90.8MB in the beginning and 67.0MB in the end (delta: 23.8MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. * TraceAbstraction took 144745.19ms. Allocated memory was 136.3MB in the beginning and 1.2GB in the end (delta: 1.0GB). Free memory was 66.4MB in the beginning and 786.6MB in the end (delta: -720.2MB). Peak memory consumption was 698.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: Maybe an infinite loop de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: Maybe an infinite loop: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:130) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-11-18 19:51:45,101 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/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_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-64bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro --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 --- [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-8393723 [2022-11-18 19:51:47,383 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 19:51:47,386 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 19:51:47,426 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 19:51:47,427 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 19:51:47,431 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 19:51:47,434 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 19:51:47,440 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 19:51:47,442 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 19:51:47,448 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 19:51:47,449 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 19:51:47,451 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 19:51:47,452 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 19:51:47,454 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 19:51:47,456 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 19:51:47,457 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 19:51:47,459 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 19:51:47,461 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 19:51:47,466 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 19:51:47,469 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 19:51:47,474 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 19:51:47,476 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 19:51:47,478 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 19:51:47,480 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 19:51:47,486 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 19:51:47,491 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 19:51:47,491 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 19:51:47,492 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 19:51:47,494 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 19:51:47,495 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 19:51:47,495 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 19:51:47,496 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 19:51:47,498 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 19:51:47,499 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 19:51:47,500 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 19:51:47,500 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 19:51:47,501 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 19:51:47,501 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 19:51:47,502 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 19:51:47,504 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 19:51:47,504 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 19:51:47,509 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-64bit-Automizer_Bitvector.epf [2022-11-18 19:51:47,547 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 19:51:47,548 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 19:51:47,549 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 19:51:47,550 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 19:51:47,551 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 19:51:47,551 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 19:51:47,553 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 19:51:47,553 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 19:51:47,553 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 19:51:47,554 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 19:51:47,555 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 19:51:47,555 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 19:51:47,556 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 19:51:47,556 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 19:51:47,556 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-18 19:51:47,557 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-18 19:51:47,557 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-18 19:51:47,557 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 19:51:47,557 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 19:51:47,558 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 19:51:47,558 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 19:51:47,558 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 19:51:47,559 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 19:51:47,559 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 19:51:47,559 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 19:51:47,559 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 19:51:47,560 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 19:51:47,560 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-18 19:51:47,561 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-18 19:51:47,561 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 19:51:47,561 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 19:51:47,561 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 19:51:47,562 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-18 19:51:47,562 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a49fa15b0860d2357f9ad3c8c6bab1d80cf83a6734355dc0b05c55121c837273 [2022-11-18 19:51:47,965 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 19:51:47,990 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 19:51:47,992 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 19:51:47,994 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 19:51:47,995 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 19:51:47,996 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i [2022-11-18 19:51:48,071 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/data/5aa92a502/0021b879db7e40d8bfcdb4559de07936/FLAG84f14ac18 [2022-11-18 19:51:48,935 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 19:51:48,937 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i [2022-11-18 19:51:48,977 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/data/5aa92a502/0021b879db7e40d8bfcdb4559de07936/FLAG84f14ac18 [2022-11-18 19:51:49,448 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/data/5aa92a502/0021b879db7e40d8bfcdb4559de07936 [2022-11-18 19:51:49,450 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 19:51:49,452 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 19:51:49,453 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 19:51:49,453 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 19:51:49,458 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 19:51:49,459 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 07:51:49" (1/1) ... [2022-11-18 19:51:49,460 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2aacf2a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:51:49, skipping insertion in model container [2022-11-18 19:51:49,460 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 07:51:49" (1/1) ... [2022-11-18 19:51:49,468 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 19:51:49,571 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 19:51:49,872 WARN L234 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_95020206-82ce-4221-bd4b-8d48f434c820/sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i[4493,4506] [2022-11-18 19:51:49,880 WARN L234 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_95020206-82ce-4221-bd4b-8d48f434c820/sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i[4553,4566] [2022-11-18 19:51:50,745 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 19:51:50,746 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 19:51:50,746 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 19:51:50,747 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 19:51:50,748 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 19:51:50,763 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 19:51:50,764 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 19:51:50,766 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 19:51:50,767 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 19:51:50,769 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 19:51:50,770 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 19:51:50,771 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 19:51:50,772 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 19:51:51,205 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-18 19:51:51,206 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-18 19:51:51,207 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-18 19:51:51,209 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-18 19:51:51,211 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-18 19:51:51,212 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-18 19:51:51,213 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-18 19:51:51,214 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-18 19:51:51,215 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-18 19:51:51,217 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-18 19:51:51,427 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-18 19:51:51,475 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 19:51:51,516 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-18 19:51:51,554 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 19:51:51,559 WARN L234 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_95020206-82ce-4221-bd4b-8d48f434c820/sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i[4493,4506] [2022-11-18 19:51:51,559 WARN L234 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_95020206-82ce-4221-bd4b-8d48f434c820/sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i[4553,4566] [2022-11-18 19:51:51,633 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 19:51:51,634 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 19:51:51,635 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 19:51:51,635 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 19:51:51,636 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 19:51:51,649 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 19:51:51,649 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 19:51:51,654 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 19:51:51,655 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 19:51:51,657 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 19:51:51,657 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 19:51:51,658 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 19:51:51,659 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 19:51:51,710 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-18 19:51:51,714 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-18 19:51:51,714 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-18 19:51:51,715 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-18 19:51:51,722 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-18 19:51:51,722 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-18 19:51:51,723 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-18 19:51:51,724 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-18 19:51:51,724 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-18 19:51:51,725 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-18 19:51:51,765 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-18 19:51:51,779 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 19:51:51,785 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 19:51:51,798 WARN L234 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_95020206-82ce-4221-bd4b-8d48f434c820/sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i[4493,4506] [2022-11-18 19:51:51,799 WARN L234 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_95020206-82ce-4221-bd4b-8d48f434c820/sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i[4553,4566] [2022-11-18 19:51:51,851 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 19:51:51,852 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 19:51:51,852 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 19:51:51,852 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 19:51:51,853 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 19:51:51,858 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 19:51:51,858 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 19:51:51,859 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 19:51:51,860 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 19:51:51,861 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 19:51:51,861 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 19:51:51,862 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 19:51:51,862 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 19:51:51,891 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-18 19:51:51,892 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-18 19:51:51,893 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-18 19:51:51,894 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-18 19:51:51,894 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-18 19:51:51,895 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-18 19:51:51,895 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-18 19:51:51,896 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-18 19:51:51,896 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-18 19:51:51,897 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-18 19:51:51,919 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-18 19:51:51,935 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 19:51:52,135 INFO L208 MainTranslator]: Completed translation [2022-11-18 19:51:52,136 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:51:52 WrapperNode [2022-11-18 19:51:52,136 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 19:51:52,137 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 19:51:52,137 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 19:51:52,137 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 19:51:52,144 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:51:52" (1/1) ... [2022-11-18 19:51:52,212 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:51:52" (1/1) ... [2022-11-18 19:51:52,247 INFO L138 Inliner]: procedures = 698, calls = 1039, calls flagged for inlining = 52, calls inlined = 6, statements flattened = 136 [2022-11-18 19:51:52,259 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 19:51:52,260 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 19:51:52,260 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 19:51:52,261 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 19:51:52,270 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:51:52" (1/1) ... [2022-11-18 19:51:52,271 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:51:52" (1/1) ... [2022-11-18 19:51:52,276 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:51:52" (1/1) ... [2022-11-18 19:51:52,285 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:51:52" (1/1) ... [2022-11-18 19:51:52,318 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:51:52" (1/1) ... [2022-11-18 19:51:52,322 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:51:52" (1/1) ... [2022-11-18 19:51:52,326 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:51:52" (1/1) ... [2022-11-18 19:51:52,340 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:51:52" (1/1) ... [2022-11-18 19:51:52,346 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 19:51:52,347 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 19:51:52,347 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 19:51:52,347 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 19:51:52,348 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:51:52" (1/1) ... [2022-11-18 19:51:52,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 19:51:52,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:51:52,400 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 19:51:52,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 19:51:52,447 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 19:51:52,447 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-18 19:51:52,447 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-18 19:51:52,447 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-18 19:51:52,447 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2022-11-18 19:51:52,448 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2022-11-18 19:51:52,448 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-18 19:51:52,449 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2022-11-18 19:51:52,449 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2022-11-18 19:51:52,449 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 19:51:52,450 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-18 19:51:52,450 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 19:51:52,450 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 19:51:52,451 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-18 19:51:52,451 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-18 19:51:52,451 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-18 19:51:52,451 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-18 19:51:52,451 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-18 19:51:52,451 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2022-11-18 19:51:52,452 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2022-11-18 19:51:52,829 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 19:51:52,831 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 19:51:53,157 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 19:51:53,164 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 19:51:53,164 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-18 19:51:53,166 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 07:51:53 BoogieIcfgContainer [2022-11-18 19:51:53,166 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 19:51:53,168 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 19:51:53,169 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 19:51:53,172 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 19:51:53,172 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 07:51:49" (1/3) ... [2022-11-18 19:51:53,173 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4774a5ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 07:51:53, skipping insertion in model container [2022-11-18 19:51:53,173 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:51:52" (2/3) ... [2022-11-18 19:51:53,173 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4774a5ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 07:51:53, skipping insertion in model container [2022-11-18 19:51:53,173 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 07:51:53" (3/3) ... [2022-11-18 19:51:53,174 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_linked_list_end_harness.i [2022-11-18 19:51:53,193 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 19:51:53,193 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-18 19:51:53,242 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 19:51:53,247 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=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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@120e5b0b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 19:51:53,248 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-18 19:51:53,252 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) [2022-11-18 19:51:53,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-18 19:51:53,263 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:51:53,264 INFO L195 NwaCegarLoop]: 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] [2022-11-18 19:51:53,264 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:51:53,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:51:53,270 INFO L85 PathProgramCache]: Analyzing trace with hash -2107862704, now seen corresponding path program 1 times [2022-11-18 19:51:53,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:51:53,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [727157518] [2022-11-18 19:51:53,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:51:53,285 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:51:53,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:51:53,287 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:51:53,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-18 19:51:53,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:51:53,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-18 19:51:53,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:51:53,756 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-18 19:51:53,757 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:51:53,758 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:51:53,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [727157518] [2022-11-18 19:51:53,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [727157518] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:51:53,759 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:51:53,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 19:51:53,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908501826] [2022-11-18 19:51:53,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:51:53,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 19:51:53,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:51:53,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 19:51:53,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 19:51:53,810 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 14.5) internal successors, (29), 2 states have internal predecessors, (29), 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) [2022-11-18 19:51:53,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:51:53,841 INFO L93 Difference]: Finished difference Result 128 states and 184 transitions. [2022-11-18 19:51:53,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 19:51:53,844 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 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 [2022-11-18 19:51:53,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:51:53,852 INFO L225 Difference]: With dead ends: 128 [2022-11-18 19:51:53,852 INFO L226 Difference]: Without dead ends: 63 [2022-11-18 19:51:53,856 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 19:51:53,859 INFO L413 NwaCegarLoop]: 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 [2022-11-18 19:51:53,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 19:51:53,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-11-18 19:51:53,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2022-11-18 19:51:53,892 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) [2022-11-18 19:51:53,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 82 transitions. [2022-11-18 19:51:53,897 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 82 transitions. Word has length 68 [2022-11-18 19:51:53,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:51:53,897 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 82 transitions. [2022-11-18 19:51:53,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 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) [2022-11-18 19:51:53,898 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 82 transitions. [2022-11-18 19:51:53,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-18 19:51:53,901 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:51:53,901 INFO L195 NwaCegarLoop]: 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] [2022-11-18 19:51:53,919 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-18 19:51:54,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:51:54,115 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:51:54,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:51:54,116 INFO L85 PathProgramCache]: Analyzing trace with hash 900796622, now seen corresponding path program 1 times [2022-11-18 19:51:54,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:51:54,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [279934962] [2022-11-18 19:51:54,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:51:54,118 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:51:54,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:51:54,122 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:51:54,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-18 19:51:54,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:51:54,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-18 19:51:54,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:51:54,529 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-18 19:51:54,529 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:51:54,529 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:51:54,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [279934962] [2022-11-18 19:51:54,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [279934962] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:51:54,530 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:51:54,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-18 19:51:54,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201221149] [2022-11-18 19:51:54,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:51:54,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 19:51:54,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:51:54,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 19:51:54,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-18 19:51:54,533 INFO L87 Difference]: Start difference. First operand 63 states and 82 transitions. Second operand has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-18 19:51:54,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:51:54,650 INFO L93 Difference]: Finished difference Result 114 states and 152 transitions. [2022-11-18 19:51:54,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 19:51:54,651 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 68 [2022-11-18 19:51:54,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:51:54,654 INFO L225 Difference]: With dead ends: 114 [2022-11-18 19:51:54,654 INFO L226 Difference]: Without dead ends: 65 [2022-11-18 19:51:54,655 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-18 19:51:54,656 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 2 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 19:51:54,657 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 370 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 19:51:54,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-11-18 19:51:54,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2022-11-18 19:51:54,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 45 states have (on average 1.288888888888889) internal successors, (58), 47 states have internal predecessors, (58), 13 states have call successors, (13), 5 states have call predecessors, (13), 6 states have return successors, (15), 12 states have call predecessors, (15), 12 states have call successors, (15) [2022-11-18 19:51:54,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 86 transitions. [2022-11-18 19:51:54,677 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 86 transitions. Word has length 68 [2022-11-18 19:51:54,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:51:54,678 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 86 transitions. [2022-11-18 19:51:54,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-18 19:51:54,678 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 86 transitions. [2022-11-18 19:51:54,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-18 19:51:54,683 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:51:54,683 INFO L195 NwaCegarLoop]: 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] [2022-11-18 19:51:54,703 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-11-18 19:51:54,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:51:54,896 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:51:54,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:51:54,897 INFO L85 PathProgramCache]: Analyzing trace with hash 577933322, now seen corresponding path program 1 times [2022-11-18 19:51:54,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:51:54,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1781577773] [2022-11-18 19:51:54,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:51:54,899 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:51:54,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:51:54,900 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:51:54,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-18 19:51:55,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:51:55,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-18 19:51:55,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:51:55,304 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-18 19:51:55,304 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:51:55,305 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:51:55,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1781577773] [2022-11-18 19:51:55,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1781577773] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:51:55,305 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:51:55,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-18 19:51:55,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169904619] [2022-11-18 19:51:55,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:51:55,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 19:51:55,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:51:55,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 19:51:55,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-18 19:51:55,308 INFO L87 Difference]: Start difference. First operand 65 states and 86 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 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) [2022-11-18 19:51:55,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:51:55,546 INFO L93 Difference]: Finished difference Result 119 states and 161 transitions. [2022-11-18 19:51:55,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 19:51:55,547 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 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 [2022-11-18 19:51:55,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:51:55,548 INFO L225 Difference]: With dead ends: 119 [2022-11-18 19:51:55,548 INFO L226 Difference]: Without dead ends: 68 [2022-11-18 19:51:55,549 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-18 19:51:55,550 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 38 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 19:51:55,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 279 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 19:51:55,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-11-18 19:51:55,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2022-11-18 19:51:55,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 47 states have (on average 1.2765957446808511) internal successors, (60), 50 states have internal predecessors, (60), 13 states have call successors, (13), 5 states have call predecessors, (13), 7 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2022-11-18 19:51:55,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 90 transitions. [2022-11-18 19:51:55,571 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 90 transitions. Word has length 70 [2022-11-18 19:51:55,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:51:55,573 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 90 transitions. [2022-11-18 19:51:55,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 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) [2022-11-18 19:51:55,574 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 90 transitions. [2022-11-18 19:51:55,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-18 19:51:55,580 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:51:55,580 INFO L195 NwaCegarLoop]: 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] [2022-11-18 19:51:55,600 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-11-18 19:51:55,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:51:55,796 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:51:55,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:51:55,801 INFO L85 PathProgramCache]: Analyzing trace with hash -34807881, now seen corresponding path program 1 times [2022-11-18 19:51:55,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:51:55,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [576852695] [2022-11-18 19:51:55,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:51:55,803 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:51:55,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:51:55,806 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:51:55,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-18 19:51:56,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:51:56,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-18 19:51:56,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:51:56,231 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-18 19:51:56,232 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:51:56,232 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:51:56,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [576852695] [2022-11-18 19:51:56,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [576852695] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:51:56,233 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:51:56,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-18 19:51:56,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568473331] [2022-11-18 19:51:56,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:51:56,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 19:51:56,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:51:56,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 19:51:56,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-18 19:51:56,235 INFO L87 Difference]: Start difference. First operand 68 states and 90 transitions. Second operand has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 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) [2022-11-18 19:51:56,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:51:56,599 INFO L93 Difference]: Finished difference Result 134 states and 185 transitions. [2022-11-18 19:51:56,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 19:51:56,601 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 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 [2022-11-18 19:51:56,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:51:56,602 INFO L225 Difference]: With dead ends: 134 [2022-11-18 19:51:56,602 INFO L226 Difference]: Without dead ends: 80 [2022-11-18 19:51:56,604 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-11-18 19:51:56,605 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 68 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 19:51:56,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 331 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 19:51:56,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-11-18 19:51:56,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 70. [2022-11-18 19:51:56,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 49 states have (on average 1.2857142857142858) internal successors, (63), 52 states have internal predecessors, (63), 13 states have call successors, (13), 5 states have call predecessors, (13), 7 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2022-11-18 19:51:56,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 93 transitions. [2022-11-18 19:51:56,621 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 93 transitions. Word has length 72 [2022-11-18 19:51:56,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:51:56,622 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 93 transitions. [2022-11-18 19:51:56,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 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) [2022-11-18 19:51:56,622 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 93 transitions. [2022-11-18 19:51:56,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-18 19:51:56,623 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:51:56,623 INFO L195 NwaCegarLoop]: 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] [2022-11-18 19:51:56,644 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-18 19:51:56,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:51:56,831 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:51:56,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:51:56,832 INFO L85 PathProgramCache]: Analyzing trace with hash 387052583, now seen corresponding path program 1 times [2022-11-18 19:51:56,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:51:56,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [230583355] [2022-11-18 19:51:56,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:51:56,833 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:51:56,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:51:56,835 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:51:56,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-18 19:51:57,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:51:57,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-18 19:51:57,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:51:57,178 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-18 19:51:57,179 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:51:57,179 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:51:57,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [230583355] [2022-11-18 19:51:57,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [230583355] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:51:57,180 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:51:57,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-18 19:51:57,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728327237] [2022-11-18 19:51:57,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:51:57,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 19:51:57,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:51:57,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 19:51:57,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-18 19:51:57,182 INFO L87 Difference]: Start difference. First operand 70 states and 93 transitions. Second operand has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 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) [2022-11-18 19:51:57,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:51:57,402 INFO L93 Difference]: Finished difference Result 135 states and 189 transitions. [2022-11-18 19:51:57,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 19:51:57,403 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 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 [2022-11-18 19:51:57,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:51:57,404 INFO L225 Difference]: With dead ends: 135 [2022-11-18 19:51:57,405 INFO L226 Difference]: Without dead ends: 79 [2022-11-18 19:51:57,405 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-18 19:51:57,406 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 53 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 19:51:57,406 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 218 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 19:51:57,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-11-18 19:51:57,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 71. [2022-11-18 19:51:57,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 50 states have (on average 1.28) internal successors, (64), 53 states have internal predecessors, (64), 13 states have call successors, (13), 5 states have call predecessors, (13), 7 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2022-11-18 19:51:57,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 94 transitions. [2022-11-18 19:51:57,420 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 94 transitions. Word has length 73 [2022-11-18 19:51:57,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:51:57,420 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 94 transitions. [2022-11-18 19:51:57,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 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) [2022-11-18 19:51:57,421 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 94 transitions. [2022-11-18 19:51:57,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-18 19:51:57,422 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:51:57,422 INFO L195 NwaCegarLoop]: 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] [2022-11-18 19:51:57,444 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-18 19:51:57,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:51:57,638 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:51:57,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:51:57,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1595103561, now seen corresponding path program 1 times [2022-11-18 19:51:57,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:51:57,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [73102533] [2022-11-18 19:51:57,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:51:57,640 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:51:57,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:51:57,641 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:51:57,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-18 19:51:57,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:51:57,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-18 19:51:57,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:51:57,945 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-18 19:51:57,946 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:51:57,946 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:51:57,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [73102533] [2022-11-18 19:51:57,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [73102533] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:51:57,946 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:51:57,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-18 19:51:57,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034157951] [2022-11-18 19:51:57,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:51:57,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 19:51:57,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:51:57,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 19:51:57,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-18 19:51:57,949 INFO L87 Difference]: Start difference. First operand 71 states and 94 transitions. Second operand has 7 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-18 19:51:58,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:51:58,054 INFO L93 Difference]: Finished difference Result 134 states and 181 transitions. [2022-11-18 19:51:58,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 19:51:58,055 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 81 [2022-11-18 19:51:58,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:51:58,056 INFO L225 Difference]: With dead ends: 134 [2022-11-18 19:51:58,056 INFO L226 Difference]: Without dead ends: 77 [2022-11-18 19:51:58,057 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-18 19:51:58,058 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 4 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 19:51:58,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 457 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 19:51:58,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-11-18 19:51:58,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 72. [2022-11-18 19:51:58,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 51 states have (on average 1.2745098039215685) internal successors, (65), 54 states have internal predecessors, (65), 13 states have call successors, (13), 5 states have call predecessors, (13), 7 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2022-11-18 19:51:58,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 95 transitions. [2022-11-18 19:51:58,092 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 95 transitions. Word has length 81 [2022-11-18 19:51:58,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:51:58,092 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 95 transitions. [2022-11-18 19:51:58,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-18 19:51:58,093 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 95 transitions. [2022-11-18 19:51:58,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-18 19:51:58,097 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:51:58,098 INFO L195 NwaCegarLoop]: 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] [2022-11-18 19:51:58,119 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-18 19:51:58,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:51:58,314 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:51:58,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:51:58,315 INFO L85 PathProgramCache]: Analyzing trace with hash -1786751690, now seen corresponding path program 1 times [2022-11-18 19:51:58,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:51:58,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [348135027] [2022-11-18 19:51:58,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:51:58,316 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:51:58,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:51:58,316 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:51:58,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-18 19:51:58,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:51:58,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-18 19:51:58,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:52:00,885 WARN L859 $PredicateComparison]: unable to prove that (or (exists ((|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_BEFORE_CALL_1| (_ BitVec 64)) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_BEFORE_CALL_1| (_ BitVec 64))) (not (= (_ bv0 64) (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_BEFORE_CALL_1|) |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_BEFORE_CALL_1|)))) (exists ((|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_BEFORE_CALL_1| (_ BitVec 64)) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_BEFORE_CALL_1| (_ BitVec 64))) (not (= (_ bv0 64) (select (select |c_#memory_$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|))))) is different from true [2022-11-18 19:52:01,373 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 26 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-18 19:52:01,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:52:01,720 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-18 19:52:01,720 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:52:01,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [348135027] [2022-11-18 19:52:01,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [348135027] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:52:01,720 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:52:01,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2022-11-18 19:52:01,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890618071] [2022-11-18 19:52:01,721 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:52:01,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 19:52:01,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:52:01,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 19:52:01,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=87, Unknown=1, NotChecked=18, Total=132 [2022-11-18 19:52:01,723 INFO L87 Difference]: Start difference. First operand 72 states and 95 transitions. Second operand has 12 states, 12 states have (on average 6.0) internal successors, (72), 12 states have internal predecessors, (72), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-18 19:52:02,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:52:02,574 INFO L93 Difference]: Finished difference Result 173 states and 249 transitions. [2022-11-18 19:52:02,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-18 19:52:02,578 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.0) internal successors, (72), 12 states have internal predecessors, (72), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 83 [2022-11-18 19:52:02,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:52:02,579 INFO L225 Difference]: With dead ends: 173 [2022-11-18 19:52:02,579 INFO L226 Difference]: Without dead ends: 115 [2022-11-18 19:52:02,580 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 157 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=62, Invalid=181, Unknown=1, NotChecked=28, Total=272 [2022-11-18 19:52:02,581 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 126 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 166 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 19:52:02,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 460 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 166 Invalid, 0 Unknown, 166 Unchecked, 0.5s Time] [2022-11-18 19:52:02,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-11-18 19:52:02,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 89. [2022-11-18 19:52:02,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 66 states have (on average 1.303030303030303) internal successors, (86), 69 states have internal predecessors, (86), 14 states have call successors, (14), 6 states have call predecessors, (14), 8 states have return successors, (19), 13 states have call predecessors, (19), 13 states have call successors, (19) [2022-11-18 19:52:02,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 119 transitions. [2022-11-18 19:52:02,606 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 119 transitions. Word has length 83 [2022-11-18 19:52:02,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:52:02,607 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 119 transitions. [2022-11-18 19:52:02,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.0) internal successors, (72), 12 states have internal predecessors, (72), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-18 19:52:02,607 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 119 transitions. [2022-11-18 19:52:02,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-18 19:52:02,608 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:52:02,609 INFO L195 NwaCegarLoop]: 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] [2022-11-18 19:52:02,629 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-18 19:52:02,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:52:02,825 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:52:02,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:52:02,825 INFO L85 PathProgramCache]: Analyzing trace with hash 2090819000, now seen corresponding path program 1 times [2022-11-18 19:52:02,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:52:02,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1957292928] [2022-11-18 19:52:02,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:52:02,826 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:52:02,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:52:02,826 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:52:02,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-18 19:52:03,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:52:03,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-18 19:52:03,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:52:03,102 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-18 19:52:03,103 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:52:03,103 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:52:03,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1957292928] [2022-11-18 19:52:03,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1957292928] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:52:03,107 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:52:03,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 19:52:03,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719793557] [2022-11-18 19:52:03,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:52:03,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 19:52:03,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:52:03,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 19:52:03,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 19:52:03,111 INFO L87 Difference]: Start difference. First operand 89 states and 119 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 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) [2022-11-18 19:52:03,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:52:03,161 INFO L93 Difference]: Finished difference Result 167 states and 235 transitions. [2022-11-18 19:52:03,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 19:52:03,161 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 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 [2022-11-18 19:52:03,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:52:03,166 INFO L225 Difference]: With dead ends: 167 [2022-11-18 19:52:03,166 INFO L226 Difference]: Without dead ends: 92 [2022-11-18 19:52:03,167 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:52:03,168 INFO L413 NwaCegarLoop]: 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 [2022-11-18 19:52:03,168 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 244 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 19:52:03,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-11-18 19:52:03,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 89. [2022-11-18 19:52:03,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 66 states have (on average 1.2878787878787878) internal successors, (85), 69 states have internal predecessors, (85), 14 states have call successors, (14), 6 states have call predecessors, (14), 8 states have return successors, (19), 13 states have call predecessors, (19), 13 states have call successors, (19) [2022-11-18 19:52:03,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 118 transitions. [2022-11-18 19:52:03,212 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 118 transitions. Word has length 83 [2022-11-18 19:52:03,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:52:03,212 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 118 transitions. [2022-11-18 19:52:03,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 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) [2022-11-18 19:52:03,213 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 118 transitions. [2022-11-18 19:52:03,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-18 19:52:03,213 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:52:03,214 INFO L195 NwaCegarLoop]: 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] [2022-11-18 19:52:03,236 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-18 19:52:03,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:52:03,427 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:52:03,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:52:03,428 INFO L85 PathProgramCache]: Analyzing trace with hash -242573638, now seen corresponding path program 1 times [2022-11-18 19:52:03,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:52:03,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2037015383] [2022-11-18 19:52:03,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:52:03,429 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:52:03,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:52:03,430 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:52:03,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-18 19:52:03,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:52:03,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 19:52:03,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:52:03,692 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-18 19:52:03,693 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:52:03,693 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:52:03,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2037015383] [2022-11-18 19:52:03,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2037015383] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:52:03,694 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:52:03,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 19:52:03,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975593160] [2022-11-18 19:52:03,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:52:03,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 19:52:03,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:52:03,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 19:52:03,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:52:03,696 INFO L87 Difference]: Start difference. First operand 89 states and 118 transitions. Second operand has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-18 19:52:03,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:52:03,770 INFO L93 Difference]: Finished difference Result 165 states and 231 transitions. [2022-11-18 19:52:03,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 19:52:03,771 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 83 [2022-11-18 19:52:03,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:52:03,772 INFO L225 Difference]: With dead ends: 165 [2022-11-18 19:52:03,773 INFO L226 Difference]: Without dead ends: 90 [2022-11-18 19:52:03,773 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-18 19:52:03,774 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 6 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 19:52:03,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 311 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 19:52:03,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-11-18 19:52:03,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 86. [2022-11-18 19:52:03,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 63 states have (on average 1.253968253968254) internal successors, (79), 66 states have internal predecessors, (79), 14 states have call successors, (14), 6 states have call predecessors, (14), 8 states have return successors, (19), 13 states have call predecessors, (19), 13 states have call successors, (19) [2022-11-18 19:52:03,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 112 transitions. [2022-11-18 19:52:03,788 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 112 transitions. Word has length 83 [2022-11-18 19:52:03,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:52:03,788 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 112 transitions. [2022-11-18 19:52:03,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-18 19:52:03,789 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 112 transitions. [2022-11-18 19:52:03,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-18 19:52:03,790 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:52:03,790 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:52:03,810 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-18 19:52:04,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:52:04,006 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:52:04,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:52:04,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1911369352, now seen corresponding path program 1 times [2022-11-18 19:52:04,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:52:04,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [662544685] [2022-11-18 19:52:04,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:52:04,007 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:52:04,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:52:04,008 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:52:04,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-18 19:52:04,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:52:04,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-18 19:52:04,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:52:06,219 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 43 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 19:52:06,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:52:09,511 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-11-18 19:52:09,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 25 [2022-11-18 19:52:09,528 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-11-18 19:52:09,528 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 12 [2022-11-18 19:52:09,589 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-18 19:52:09,589 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:52:09,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [662544685] [2022-11-18 19:52:09,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [662544685] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:52:09,590 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:52:09,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2022-11-18 19:52:09,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380987446] [2022-11-18 19:52:09,590 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:52:09,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-18 19:52:09,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:52:09,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-18 19:52:09,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2022-11-18 19:52:09,592 INFO L87 Difference]: Start difference. First operand 86 states and 112 transitions. Second operand has 19 states, 17 states have (on average 5.9411764705882355) internal successors, (101), 17 states have internal predecessors, (101), 8 states have call successors, (17), 4 states have call predecessors, (17), 7 states have return successors, (16), 6 states have call predecessors, (16), 8 states have call successors, (16) [2022-11-18 19:52:10,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:52:10,974 INFO L93 Difference]: Finished difference Result 192 states and 256 transitions. [2022-11-18 19:52:10,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-18 19:52:10,975 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 5.9411764705882355) internal successors, (101), 17 states have internal predecessors, (101), 8 states have call successors, (17), 4 states have call predecessors, (17), 7 states have return successors, (16), 6 states have call predecessors, (16), 8 states have call successors, (16) Word has length 84 [2022-11-18 19:52:10,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:52:10,976 INFO L225 Difference]: With dead ends: 192 [2022-11-18 19:52:10,977 INFO L226 Difference]: Without dead ends: 121 [2022-11-18 19:52:10,977 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 150 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=144, Invalid=612, Unknown=0, NotChecked=0, Total=756 [2022-11-18 19:52:10,978 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 100 mSDsluCounter, 460 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 19:52:10,978 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 553 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 122 Invalid, 0 Unknown, 77 Unchecked, 0.5s Time] [2022-11-18 19:52:10,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-11-18 19:52:11,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 108. [2022-11-18 19:52:11,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 82 states have (on average 1.2439024390243902) internal successors, (102), 86 states have internal predecessors, (102), 14 states have call successors, (14), 8 states have call predecessors, (14), 11 states have return successors, (22), 13 states have call predecessors, (22), 13 states have call successors, (22) [2022-11-18 19:52:11,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 138 transitions. [2022-11-18 19:52:11,006 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 138 transitions. Word has length 84 [2022-11-18 19:52:11,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:52:11,007 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 138 transitions. [2022-11-18 19:52:11,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 5.9411764705882355) internal successors, (101), 17 states have internal predecessors, (101), 8 states have call successors, (17), 4 states have call predecessors, (17), 7 states have return successors, (16), 6 states have call predecessors, (16), 8 states have call successors, (16) [2022-11-18 19:52:11,008 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 138 transitions. [2022-11-18 19:52:11,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-18 19:52:11,008 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:52:11,009 INFO L195 NwaCegarLoop]: 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] [2022-11-18 19:52:11,031 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-18 19:52:11,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:52:11,225 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:52:11,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:52:11,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1973408966, now seen corresponding path program 1 times [2022-11-18 19:52:11,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:52:11,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [541233213] [2022-11-18 19:52:11,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:52:11,227 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:52:11,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:52:11,228 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:52:11,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-18 19:52:11,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:52:11,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-18 19:52:11,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:52:11,628 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-11-18 19:52:11,635 INFO L350 Elim1Store]: Elim1 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 6 treesize of output 5 [2022-11-18 19:52:12,837 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-18 19:52:12,837 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:52:12,837 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:52:12,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [541233213] [2022-11-18 19:52:12,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [541233213] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:52:12,838 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:52:12,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-18 19:52:12,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883628971] [2022-11-18 19:52:12,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:52:12,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-18 19:52:12,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:52:12,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-18 19:52:12,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-11-18 19:52:12,840 INFO L87 Difference]: Start difference. First operand 108 states and 138 transitions. Second operand has 11 states, 10 states have (on average 6.6) internal successors, (66), 11 states have internal predecessors, (66), 5 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-18 19:52:13,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:52:13,174 INFO L93 Difference]: Finished difference Result 275 states and 354 transitions. [2022-11-18 19:52:13,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-18 19:52:13,175 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 6.6) internal successors, (66), 11 states have internal predecessors, (66), 5 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) Word has length 84 [2022-11-18 19:52:13,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:52:13,176 INFO L225 Difference]: With dead ends: 275 [2022-11-18 19:52:13,177 INFO L226 Difference]: Without dead ends: 189 [2022-11-18 19:52:13,177 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 71 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-11-18 19:52:13,178 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 37 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 19:52:13,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 502 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 77 Unchecked, 0.2s Time] [2022-11-18 19:52:13,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-11-18 19:52:13,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 170. [2022-11-18 19:52:13,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 134 states have (on average 1.2537313432835822) internal successors, (168), 139 states have internal predecessors, (168), 19 states have call successors, (19), 13 states have call predecessors, (19), 16 states have return successors, (29), 17 states have call predecessors, (29), 18 states have call successors, (29) [2022-11-18 19:52:13,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 216 transitions. [2022-11-18 19:52:13,210 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 216 transitions. Word has length 84 [2022-11-18 19:52:13,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:52:13,210 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 216 transitions. [2022-11-18 19:52:13,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 6.6) internal successors, (66), 11 states have internal predecessors, (66), 5 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-18 19:52:13,211 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 216 transitions. [2022-11-18 19:52:13,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-18 19:52:13,212 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:52:13,212 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:52:13,229 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-18 19:52:13,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:52:13,428 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:52:13,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:52:13,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1463935876, now seen corresponding path program 1 times [2022-11-18 19:52:13,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:52:13,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2015918092] [2022-11-18 19:52:13,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:52:13,430 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:52:13,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:52:13,430 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:52:13,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-18 19:52:13,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:52:13,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-18 19:52:13,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:52:15,710 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 40 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 19:52:15,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:52:18,632 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-11-18 19:52:18,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 25 [2022-11-18 19:52:18,663 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-11-18 19:52:18,663 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 12 [2022-11-18 19:52:18,684 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-18 19:52:18,685 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:52:18,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2015918092] [2022-11-18 19:52:18,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2015918092] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:52:18,685 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:52:18,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2022-11-18 19:52:18,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043106816] [2022-11-18 19:52:18,685 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:52:18,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-18 19:52:18,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:52:18,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-18 19:52:18,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-11-18 19:52:18,687 INFO L87 Difference]: Start difference. First operand 170 states and 216 transitions. Second operand has 23 states, 21 states have (on average 4.857142857142857) internal successors, (102), 21 states have internal predecessors, (102), 8 states have call successors, (17), 4 states have call predecessors, (17), 7 states have return successors, (16), 6 states have call predecessors, (16), 8 states have call successors, (16) [2022-11-18 19:52:21,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:52:21,728 INFO L93 Difference]: Finished difference Result 268 states and 336 transitions. [2022-11-18 19:52:21,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-18 19:52:21,729 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 4.857142857142857) internal successors, (102), 21 states have internal predecessors, (102), 8 states have call successors, (17), 4 states have call predecessors, (17), 7 states have return successors, (16), 6 states have call predecessors, (16), 8 states have call successors, (16) Word has length 84 [2022-11-18 19:52:21,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:52:21,731 INFO L225 Difference]: With dead ends: 268 [2022-11-18 19:52:21,731 INFO L226 Difference]: Without dead ends: 182 [2022-11-18 19:52:21,732 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 149 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=263, Invalid=1143, Unknown=0, NotChecked=0, Total=1406 [2022-11-18 19:52:21,732 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 160 mSDsluCounter, 622 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 698 SdHoareTripleChecker+Invalid, 495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 99 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-18 19:52:21,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 698 Invalid, 495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 361 Invalid, 0 Unknown, 99 Unchecked, 1.3s Time] [2022-11-18 19:52:21,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-11-18 19:52:21,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 168. [2022-11-18 19:52:21,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 132 states have (on average 1.2348484848484849) internal successors, (163), 137 states have internal predecessors, (163), 19 states have call successors, (19), 13 states have call predecessors, (19), 16 states have return successors, (29), 17 states have call predecessors, (29), 18 states have call successors, (29) [2022-11-18 19:52:21,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 211 transitions. [2022-11-18 19:52:21,759 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 211 transitions. Word has length 84 [2022-11-18 19:52:21,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:52:21,760 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 211 transitions. [2022-11-18 19:52:21,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 4.857142857142857) internal successors, (102), 21 states have internal predecessors, (102), 8 states have call successors, (17), 4 states have call predecessors, (17), 7 states have return successors, (16), 6 states have call predecessors, (16), 8 states have call successors, (16) [2022-11-18 19:52:21,760 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 211 transitions. [2022-11-18 19:52:21,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-18 19:52:21,761 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:52:21,762 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:52:21,784 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-18 19:52:21,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:52:21,979 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:52:21,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:52:21,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1486568130, now seen corresponding path program 1 times [2022-11-18 19:52:21,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:52:21,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2350821] [2022-11-18 19:52:21,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:52:21,980 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:52:21,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:52:21,981 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:52:21,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-18 19:52:22,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:52:22,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-18 19:52:22,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:52:23,426 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 36 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:52:23,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:52:24,094 INFO L350 Elim1Store]: Elim1 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 17 treesize of output 9 [2022-11-18 19:52:24,297 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:52:24,298 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 20 [2022-11-18 19:52:24,726 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-18 19:52:24,727 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:52:24,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2350821] [2022-11-18 19:52:24,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2350821] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:52:24,727 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:52:24,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 26 [2022-11-18 19:52:24,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785908480] [2022-11-18 19:52:24,728 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:52:24,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-18 19:52:24,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:52:24,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-18 19:52:24,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2022-11-18 19:52:24,729 INFO L87 Difference]: Start difference. First operand 168 states and 211 transitions. Second operand has 26 states, 24 states have (on average 4.416666666666667) internal successors, (106), 24 states have internal predecessors, (106), 8 states have call successors, (14), 3 states have call predecessors, (14), 7 states have return successors, (14), 6 states have call predecessors, (14), 8 states have call successors, (14) [2022-11-18 19:52:27,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:52:27,693 INFO L93 Difference]: Finished difference Result 394 states and 523 transitions. [2022-11-18 19:52:27,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-18 19:52:27,694 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 4.416666666666667) internal successors, (106), 24 states have internal predecessors, (106), 8 states have call successors, (14), 3 states have call predecessors, (14), 7 states have return successors, (14), 6 states have call predecessors, (14), 8 states have call successors, (14) Word has length 84 [2022-11-18 19:52:27,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:52:27,697 INFO L225 Difference]: With dead ends: 394 [2022-11-18 19:52:27,697 INFO L226 Difference]: Without dead ends: 309 [2022-11-18 19:52:27,698 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 153 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=234, Invalid=1406, Unknown=0, NotChecked=0, Total=1640 [2022-11-18 19:52:27,699 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 230 mSDsluCounter, 1139 mSDsCounter, 0 mSdLazyCounter, 707 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 1251 SdHoareTripleChecker+Invalid, 857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 133 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-18 19:52:27,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [242 Valid, 1251 Invalid, 857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 707 Invalid, 0 Unknown, 133 Unchecked, 1.8s Time] [2022-11-18 19:52:27,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2022-11-18 19:52:27,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 227. [2022-11-18 19:52:27,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 179 states have (on average 1.2122905027932962) internal successors, (217), 188 states have internal predecessors, (217), 23 states have call successors, (23), 17 states have call predecessors, (23), 24 states have return successors, (49), 21 states have call predecessors, (49), 22 states have call successors, (49) [2022-11-18 19:52:27,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 289 transitions. [2022-11-18 19:52:27,741 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 289 transitions. Word has length 84 [2022-11-18 19:52:27,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:52:27,742 INFO L495 AbstractCegarLoop]: Abstraction has 227 states and 289 transitions. [2022-11-18 19:52:27,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 4.416666666666667) internal successors, (106), 24 states have internal predecessors, (106), 8 states have call successors, (14), 3 states have call predecessors, (14), 7 states have return successors, (14), 6 states have call predecessors, (14), 8 states have call successors, (14) [2022-11-18 19:52:27,742 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 289 transitions. [2022-11-18 19:52:27,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-18 19:52:27,744 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:52:27,744 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1] [2022-11-18 19:52:27,765 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Ended with exit code 0 [2022-11-18 19:52:27,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:52:27,960 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:52:27,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:52:27,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1761327744, now seen corresponding path program 1 times [2022-11-18 19:52:27,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:52:27,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1121785886] [2022-11-18 19:52:27,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:52:27,962 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:52:27,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:52:27,964 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:52:27,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-18 19:52:28,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:52:28,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-18 19:52:28,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:52:28,268 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-18 19:52:28,268 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:52:28,268 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:52:28,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1121785886] [2022-11-18 19:52:28,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1121785886] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:52:28,268 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:52:28,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-18 19:52:28,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814608305] [2022-11-18 19:52:28,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:52:28,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 19:52:28,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:52:28,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 19:52:28,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-18 19:52:28,270 INFO L87 Difference]: Start difference. First operand 227 states and 289 transitions. Second operand has 6 states, 5 states have (on average 12.6) internal successors, (63), 6 states have internal predecessors, (63), 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) [2022-11-18 19:52:28,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:52:28,419 INFO L93 Difference]: Finished difference Result 519 states and 678 transitions. [2022-11-18 19:52:28,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 19:52:28,419 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 12.6) internal successors, (63), 6 states have internal predecessors, (63), 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 84 [2022-11-18 19:52:28,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:52:28,421 INFO L225 Difference]: With dead ends: 519 [2022-11-18 19:52:28,421 INFO L226 Difference]: Without dead ends: 203 [2022-11-18 19:52:28,423 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-18 19:52:28,423 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 48 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 19:52:28,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 316 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 19:52:28,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-11-18 19:52:28,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 201. [2022-11-18 19:52:28,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 155 states have (on average 1.1870967741935483) internal successors, (184), 163 states have internal predecessors, (184), 23 states have call successors, (23), 16 states have call predecessors, (23), 22 states have return successors, (47), 21 states have call predecessors, (47), 22 states have call successors, (47) [2022-11-18 19:52:28,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 254 transitions. [2022-11-18 19:52:28,457 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 254 transitions. Word has length 84 [2022-11-18 19:52:28,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:52:28,458 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 254 transitions. [2022-11-18 19:52:28,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 12.6) internal successors, (63), 6 states have internal predecessors, (63), 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) [2022-11-18 19:52:28,458 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 254 transitions. [2022-11-18 19:52:28,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-18 19:52:28,460 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:52:28,460 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:52:28,477 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-18 19:52:28,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:52:28,667 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:52:28,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:52:28,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1945074884, now seen corresponding path program 1 times [2022-11-18 19:52:28,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:52:28,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1071157561] [2022-11-18 19:52:28,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:52:28,668 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:52:28,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:52:28,670 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:52:28,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-18 19:52:28,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:52:28,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 19:52:28,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:52:29,022 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-18 19:52:29,022 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:52:29,022 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:52:29,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1071157561] [2022-11-18 19:52:29,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1071157561] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:52:29,022 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:52:29,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-18 19:52:29,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544213481] [2022-11-18 19:52:29,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:52:29,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 19:52:29,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:52:29,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 19:52:29,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-18 19:52:29,024 INFO L87 Difference]: Start difference. First operand 201 states and 254 transitions. Second operand has 7 states, 6 states have (on average 10.833333333333334) internal successors, (65), 7 states have internal predecessors, (65), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-18 19:52:29,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:52:29,333 INFO L93 Difference]: Finished difference Result 280 states and 354 transitions. [2022-11-18 19:52:29,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 19:52:29,334 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 10.833333333333334) internal successors, (65), 7 states have internal predecessors, (65), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 86 [2022-11-18 19:52:29,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:52:29,336 INFO L225 Difference]: With dead ends: 280 [2022-11-18 19:52:29,336 INFO L226 Difference]: Without dead ends: 198 [2022-11-18 19:52:29,336 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-18 19:52:29,337 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 42 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 19:52:29,337 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 316 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 19:52:29,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-11-18 19:52:29,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2022-11-18 19:52:29,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 153 states have (on average 1.1764705882352942) internal successors, (180), 160 states have internal predecessors, (180), 23 states have call successors, (23), 16 states have call predecessors, (23), 21 states have return successors, (44), 21 states have call predecessors, (44), 22 states have call successors, (44) [2022-11-18 19:52:29,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 247 transitions. [2022-11-18 19:52:29,381 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 247 transitions. Word has length 86 [2022-11-18 19:52:29,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:52:29,381 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 247 transitions. [2022-11-18 19:52:29,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 10.833333333333334) internal successors, (65), 7 states have internal predecessors, (65), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-18 19:52:29,382 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 247 transitions. [2022-11-18 19:52:29,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-18 19:52:29,384 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:52:29,385 INFO L195 NwaCegarLoop]: 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] [2022-11-18 19:52:29,407 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-18 19:52:29,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:52:29,603 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:52:29,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:52:29,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1677910788, now seen corresponding path program 1 times [2022-11-18 19:52:29,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:52:29,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1180776868] [2022-11-18 19:52:29,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:52:29,604 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:52:29,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:52:29,605 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:52:29,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-18 19:52:29,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:52:29,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-18 19:52:29,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:52:30,077 INFO L321 Elim1Store]: treesize reduction 30, result has 38.8 percent of original size [2022-11-18 19:52:30,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 78 [2022-11-18 19:52:30,091 INFO L350 Elim1Store]: Elim1 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 10 treesize of output 9 [2022-11-18 19:52:30,117 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 15 [2022-11-18 19:52:30,209 INFO L321 Elim1Store]: treesize reduction 35, result has 2.8 percent of original size [2022-11-18 19:52:30,209 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 102 treesize of output 46 [2022-11-18 19:52:30,213 INFO L350 Elim1Store]: Elim1 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 30 treesize of output 18 [2022-11-18 19:52:31,143 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-18 19:52:31,143 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:52:31,143 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:52:31,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1180776868] [2022-11-18 19:52:31,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1180776868] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:52:31,143 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:52:31,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-18 19:52:31,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923472458] [2022-11-18 19:52:31,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:52:31,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-18 19:52:31,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:52:31,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-18 19:52:31,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-11-18 19:52:31,145 INFO L87 Difference]: Start difference. First operand 198 states and 247 transitions. Second operand has 11 states, 10 states have (on average 6.8) internal successors, (68), 11 states have internal predecessors, (68), 5 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-18 19:52:31,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:52:31,634 INFO L93 Difference]: Finished difference Result 339 states and 426 transitions. [2022-11-18 19:52:31,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-18 19:52:31,635 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 6.8) internal successors, (68), 11 states have internal predecessors, (68), 5 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) Word has length 86 [2022-11-18 19:52:31,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:52:31,637 INFO L225 Difference]: With dead ends: 339 [2022-11-18 19:52:31,637 INFO L226 Difference]: Without dead ends: 251 [2022-11-18 19:52:31,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 73 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-11-18 19:52:31,638 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 29 mSDsluCounter, 726 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 847 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 135 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 19:52:31,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 847 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 94 Invalid, 0 Unknown, 135 Unchecked, 0.3s Time] [2022-11-18 19:52:31,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2022-11-18 19:52:31,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 147. [2022-11-18 19:52:31,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 114 states have (on average 1.2017543859649122) internal successors, (137), 117 states have internal predecessors, (137), 18 states have call successors, (18), 12 states have call predecessors, (18), 14 states have return successors, (25), 17 states have call predecessors, (25), 17 states have call successors, (25) [2022-11-18 19:52:31,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 180 transitions. [2022-11-18 19:52:31,679 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 180 transitions. Word has length 86 [2022-11-18 19:52:31,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:52:31,680 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 180 transitions. [2022-11-18 19:52:31,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 6.8) internal successors, (68), 11 states have internal predecessors, (68), 5 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-18 19:52:31,680 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 180 transitions. [2022-11-18 19:52:31,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-11-18 19:52:31,683 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:52:31,683 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-18 19:52:31,699 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-18 19:52:31,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:52:31,895 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:52:31,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:52:31,895 INFO L85 PathProgramCache]: Analyzing trace with hash -803958397, now seen corresponding path program 1 times [2022-11-18 19:52:31,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:52:31,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [74665509] [2022-11-18 19:52:31,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:52:31,896 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:52:31,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:52:31,897 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:52:31,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-18 19:52:32,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:52:32,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-18 19:52:32,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:53:07,505 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 51 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:53:07,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:53:29,345 INFO L321 Elim1Store]: treesize reduction 21, result has 78.8 percent of original size [2022-11-18 19:53:29,345 INFO L350 Elim1Store]: Elim1 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 80 treesize of output 125 [2022-11-18 19:53:29,745 INFO L321 Elim1Store]: treesize reduction 15, result has 77.6 percent of original size [2022-11-18 19:53:29,745 INFO L350 Elim1Store]: Elim1 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 102 treesize of output 125 [2022-11-18 19:53:36,065 INFO L321 Elim1Store]: treesize reduction 17, result has 82.8 percent of original size [2022-11-18 19:53:36,065 INFO L350 Elim1Store]: Elim1 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 72 treesize of output 125 [2022-11-18 19:53:36,638 INFO L321 Elim1Store]: treesize reduction 8, result has 88.1 percent of original size [2022-11-18 19:53:36,638 INFO L350 Elim1Store]: Elim1 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 102 treesize of output 132 [2022-11-18 19:53:37,785 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-18 19:53:37,786 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:53:37,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [74665509] [2022-11-18 19:53:37,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [74665509] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:53:37,786 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:53:37,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 21] total 40 [2022-11-18 19:53:37,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384564994] [2022-11-18 19:53:37,786 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:53:37,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-18 19:53:37,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:53:37,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-18 19:53:37,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1410, Unknown=15, NotChecked=0, Total=1560 [2022-11-18 19:53:37,788 INFO L87 Difference]: Start difference. First operand 147 states and 180 transitions. Second operand has 40 states, 38 states have (on average 3.3684210526315788) internal successors, (128), 33 states have internal predecessors, (128), 11 states have call successors, (19), 4 states have call predecessors, (19), 11 states have return successors, (18), 9 states have call predecessors, (18), 11 states have call successors, (18) [2022-11-18 19:53:48,634 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 19:53:50,678 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 19:54:31,604 WARN L233 SmtUtils]: Spent 21.55s on a formula simplification. DAG size of input: 67 DAG size of output: 62 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 19:54:37,617 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 19:54:39,775 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 19:54:43,654 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 19:54:45,703 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 19:54:49,893 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 19:54:51,899 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 19:54:53,904 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 19:54:55,910 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 19:54:57,914 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 19:54:59,920 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 19:55:01,924 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 19:55:03,930 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 19:55:05,936 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 19:55:07,942 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 19:55:09,948 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 19:55:11,953 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 19:55:13,959 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 19:55:15,963 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 19:55:17,969 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 19:55:19,973 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 19:55:22,912 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 19:55:24,915 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 19:55:26,920 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 19:55:28,926 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 19:55:30,931 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 19:55:32,936 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 19:55:34,940 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 19:55:36,944 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 19:55:38,947 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 19:55:40,952 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 19:55:43,080 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 19:55:45,085 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 19:55:47,088 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 19:55:49,093 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 19:55:51,099 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 19:55:53,103 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 19:55:55,109 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 19:55:57,115 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 19:56:01,987 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 19:56:04,025 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 19:56:06,620 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 19:56:08,660 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 19:56:08,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:56:08,686 INFO L93 Difference]: Finished difference Result 459 states and 651 transitions. [2022-11-18 19:56:08,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-18 19:56:08,688 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 38 states have (on average 3.3684210526315788) internal successors, (128), 33 states have internal predecessors, (128), 11 states have call successors, (19), 4 states have call predecessors, (19), 11 states have return successors, (18), 9 states have call predecessors, (18), 11 states have call successors, (18) Word has length 97 [2022-11-18 19:56:08,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:56:08,691 INFO L225 Difference]: With dead ends: 459 [2022-11-18 19:56:08,691 INFO L226 Difference]: Without dead ends: 393 [2022-11-18 19:56:08,693 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 163 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 855 ImplicationChecksByTransitivity, 100.7s TimeCoverageRelationStatistics Valid=396, Invalid=3737, Unknown=27, NotChecked=0, Total=4160 [2022-11-18 19:56:08,693 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 269 mSDsluCounter, 1753 mSDsCounter, 0 mSdLazyCounter, 1920 mSolverCounterSat, 128 mSolverCounterUnsat, 44 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 97.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 1850 SdHoareTripleChecker+Invalid, 3032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 1920 IncrementalHoareTripleChecker+Invalid, 44 IncrementalHoareTripleChecker+Unknown, 940 IncrementalHoareTripleChecker+Unchecked, 98.4s IncrementalHoareTripleChecker+Time [2022-11-18 19:56:08,694 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [286 Valid, 1850 Invalid, 3032 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 1920 Invalid, 44 Unknown, 940 Unchecked, 98.4s Time] [2022-11-18 19:56:08,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2022-11-18 19:56:08,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 268. [2022-11-18 19:56:08,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 211 states have (on average 1.1990521327014219) internal successors, (253), 218 states have internal predecessors, (253), 29 states have call successors, (29), 18 states have call predecessors, (29), 27 states have return successors, (64), 31 states have call predecessors, (64), 28 states have call successors, (64) [2022-11-18 19:56:08,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 346 transitions. [2022-11-18 19:56:08,770 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 346 transitions. Word has length 97 [2022-11-18 19:56:08,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:56:08,771 INFO L495 AbstractCegarLoop]: Abstraction has 268 states and 346 transitions. [2022-11-18 19:56:08,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 38 states have (on average 3.3684210526315788) internal successors, (128), 33 states have internal predecessors, (128), 11 states have call successors, (19), 4 states have call predecessors, (19), 11 states have return successors, (18), 9 states have call predecessors, (18), 11 states have call successors, (18) [2022-11-18 19:56:08,771 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 346 transitions. [2022-11-18 19:56:08,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-11-18 19:56:08,773 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:56:08,773 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-18 19:56:08,786 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-18 19:56:08,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:56:08,974 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:56:08,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:56:08,974 INFO L85 PathProgramCache]: Analyzing trace with hash -835719041, now seen corresponding path program 1 times [2022-11-18 19:56:08,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:56:08,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1473104487] [2022-11-18 19:56:08,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:56:08,975 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:56:08,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:56:08,976 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:56:08,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-18 19:56:09,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:56:09,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-18 19:56:09,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:56:11,504 WARN L859 $PredicateComparison]: unable to prove that (or (exists ((|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_BEFORE_CALL_9| (_ BitVec 64)) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_BEFORE_CALL_9| (_ BitVec 64))) (not (= (_ bv0 64) (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_BEFORE_CALL_9|) |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_BEFORE_CALL_9|)))) (exists ((|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_BEFORE_CALL_9| (_ BitVec 64)) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_BEFORE_CALL_9| (_ BitVec 64))) (not (= (_ bv0 64) (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_BEFORE_CALL_9|) |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_BEFORE_CALL_9|))))) is different from true [2022-11-18 19:56:17,667 WARN L233 SmtUtils]: Spent 6.07s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 19:56:23,914 WARN L233 SmtUtils]: Spent 6.12s on a formula simplification that was a NOOP. DAG size: 33 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 19:56:34,368 WARN L233 SmtUtils]: Spent 6.06s on a formula simplification that was a NOOP. DAG size: 25 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 19:56:34,420 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-18 19:56:34,421 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:56:34,421 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:56:34,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1473104487] [2022-11-18 19:56:34,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1473104487] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:56:34,422 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:56:34,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-18 19:56:34,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148904355] [2022-11-18 19:56:34,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:56:34,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 19:56:34,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:56:34,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 19:56:34,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=92, Unknown=1, NotChecked=18, Total=132 [2022-11-18 19:56:34,428 INFO L87 Difference]: Start difference. First operand 268 states and 346 transitions. Second operand has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-18 19:56:35,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:56:35,510 INFO L93 Difference]: Finished difference Result 518 states and 680 transitions. [2022-11-18 19:56:35,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-18 19:56:35,511 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 97 [2022-11-18 19:56:35,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:56:35,513 INFO L225 Difference]: With dead ends: 518 [2022-11-18 19:56:35,513 INFO L226 Difference]: Without dead ends: 300 [2022-11-18 19:56:35,514 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 25.3s TimeCoverageRelationStatistics Valid=39, Invalid=174, Unknown=1, NotChecked=26, Total=240 [2022-11-18 19:56:35,515 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 61 mSDsluCounter, 536 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 234 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 19:56:35,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 615 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 125 Invalid, 0 Unknown, 234 Unchecked, 0.6s Time] [2022-11-18 19:56:35,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2022-11-18 19:56:35,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 280. [2022-11-18 19:56:35,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 221 states have (on average 1.1900452488687783) internal successors, (263), 230 states have internal predecessors, (263), 29 states have call successors, (29), 18 states have call predecessors, (29), 29 states have return successors, (64), 31 states have call predecessors, (64), 28 states have call successors, (64) [2022-11-18 19:56:35,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 356 transitions. [2022-11-18 19:56:35,589 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 356 transitions. Word has length 97 [2022-11-18 19:56:35,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:56:35,589 INFO L495 AbstractCegarLoop]: Abstraction has 280 states and 356 transitions. [2022-11-18 19:56:35,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-18 19:56:35,590 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 356 transitions. [2022-11-18 19:56:35,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-11-18 19:56:35,592 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:56:35,592 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-18 19:56:35,618 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-18 19:56:35,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:56:35,814 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:56:35,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:56:35,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1292926853, now seen corresponding path program 1 times [2022-11-18 19:56:35,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:56:35,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1593016458] [2022-11-18 19:56:35,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:56:35,815 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:56:35,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:56:35,815 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:56:35,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-18 19:56:36,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:56:36,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-18 19:56:36,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:56:36,275 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 45 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-18 19:56:36,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:56:36,696 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-18 19:56:36,696 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:56:36,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1593016458] [2022-11-18 19:56:36,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1593016458] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:56:36,697 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:56:36,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-11-18 19:56:36,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432298508] [2022-11-18 19:56:36,697 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:56:36,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 19:56:36,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:56:36,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 19:56:36,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-11-18 19:56:36,699 INFO L87 Difference]: Start difference. First operand 280 states and 356 transitions. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 5 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2022-11-18 19:56:37,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:56:37,275 INFO L93 Difference]: Finished difference Result 615 states and 785 transitions. [2022-11-18 19:56:37,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-18 19:56:37,276 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 5 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) Word has length 97 [2022-11-18 19:56:37,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:56:37,278 INFO L225 Difference]: With dead ends: 615 [2022-11-18 19:56:37,278 INFO L226 Difference]: Without dead ends: 343 [2022-11-18 19:56:37,279 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2022-11-18 19:56:37,279 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 89 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 19:56:37,280 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 476 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-18 19:56:37,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2022-11-18 19:56:37,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 260. [2022-11-18 19:56:37,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 210 states have (on average 1.2142857142857142) internal successors, (255), 215 states have internal predecessors, (255), 24 states have call successors, (24), 16 states have call predecessors, (24), 25 states have return successors, (44), 28 states have call predecessors, (44), 23 states have call successors, (44) [2022-11-18 19:56:37,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 323 transitions. [2022-11-18 19:56:37,349 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 323 transitions. Word has length 97 [2022-11-18 19:56:37,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:56:37,349 INFO L495 AbstractCegarLoop]: Abstraction has 260 states and 323 transitions. [2022-11-18 19:56:37,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 5 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2022-11-18 19:56:37,350 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 323 transitions. [2022-11-18 19:56:37,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-18 19:56:37,351 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:56:37,351 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1] [2022-11-18 19:56:37,372 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-18 19:56:37,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:56:37,567 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:56:37,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:56:37,568 INFO L85 PathProgramCache]: Analyzing trace with hash 2087769745, now seen corresponding path program 1 times [2022-11-18 19:56:37,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:56:37,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1826464310] [2022-11-18 19:56:37,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:56:37,569 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:56:37,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:56:37,570 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:56:37,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-18 19:56:37,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:56:37,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-18 19:56:37,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:56:38,534 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-18 19:56:38,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:56:39,295 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-11-18 19:56:39,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2022-11-18 19:56:39,424 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-18 19:56:39,424 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:56:39,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1826464310] [2022-11-18 19:56:39,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1826464310] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:56:39,425 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:56:39,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2022-11-18 19:56:39,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975049377] [2022-11-18 19:56:39,425 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:56:39,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-18 19:56:39,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:56:39,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-18 19:56:39,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-11-18 19:56:39,427 INFO L87 Difference]: Start difference. First operand 260 states and 323 transitions. Second operand has 14 states, 14 states have (on average 5.642857142857143) internal successors, (79), 12 states have internal predecessors, (79), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (14), 4 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-18 19:56:40,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:56:40,381 INFO L93 Difference]: Finished difference Result 519 states and 677 transitions. [2022-11-18 19:56:40,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-18 19:56:40,382 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.642857142857143) internal successors, (79), 12 states have internal predecessors, (79), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (14), 4 states have call predecessors, (14), 3 states have call successors, (14) Word has length 94 [2022-11-18 19:56:40,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:56:40,383 INFO L225 Difference]: With dead ends: 519 [2022-11-18 19:56:40,384 INFO L226 Difference]: Without dead ends: 313 [2022-11-18 19:56:40,385 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2022-11-18 19:56:40,386 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 40 mSDsluCounter, 543 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 626 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 19:56:40,387 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 626 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 112 Invalid, 0 Unknown, 79 Unchecked, 0.4s Time] [2022-11-18 19:56:40,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2022-11-18 19:56:40,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 267. [2022-11-18 19:56:40,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 216 states have (on average 1.2175925925925926) internal successors, (263), 220 states have internal predecessors, (263), 24 states have call successors, (24), 16 states have call predecessors, (24), 26 states have return successors, (48), 30 states have call predecessors, (48), 23 states have call successors, (48) [2022-11-18 19:56:40,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 335 transitions. [2022-11-18 19:56:40,455 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 335 transitions. Word has length 94 [2022-11-18 19:56:40,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:56:40,455 INFO L495 AbstractCegarLoop]: Abstraction has 267 states and 335 transitions. [2022-11-18 19:56:40,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.642857142857143) internal successors, (79), 12 states have internal predecessors, (79), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (14), 4 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-18 19:56:40,456 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 335 transitions. [2022-11-18 19:56:40,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-18 19:56:40,457 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:56:40,457 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-18 19:56:40,479 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-18 19:56:40,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:56:40,673 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:56:40,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:56:40,674 INFO L85 PathProgramCache]: Analyzing trace with hash 1606689487, now seen corresponding path program 1 times [2022-11-18 19:56:40,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:56:40,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [759884406] [2022-11-18 19:56:40,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:56:40,675 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:56:40,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:56:40,676 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:56:40,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-18 19:56:40,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:56:40,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 19:56:40,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:56:40,953 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-18 19:56:40,953 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:56:40,953 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:56:40,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [759884406] [2022-11-18 19:56:40,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [759884406] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:56:40,954 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:56:40,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 19:56:40,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502085031] [2022-11-18 19:56:40,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:56:40,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 19:56:40,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:56:40,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 19:56:40,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:56:40,955 INFO L87 Difference]: Start difference. First operand 267 states and 335 transitions. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-18 19:56:41,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:56:41,020 INFO L93 Difference]: Finished difference Result 484 states and 619 transitions. [2022-11-18 19:56:41,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 19:56:41,021 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) Word has length 94 [2022-11-18 19:56:41,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:56:41,022 INFO L225 Difference]: With dead ends: 484 [2022-11-18 19:56:41,023 INFO L226 Difference]: Without dead ends: 265 [2022-11-18 19:56:41,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:56:41,024 INFO L413 NwaCegarLoop]: 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 [2022-11-18 19:56:41,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 310 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 19:56:41,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2022-11-18 19:56:41,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 261. [2022-11-18 19:56:41,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 210 states have (on average 1.1761904761904762) internal successors, (247), 215 states have internal predecessors, (247), 24 states have call successors, (24), 16 states have call predecessors, (24), 26 states have return successors, (48), 29 states have call predecessors, (48), 23 states have call successors, (48) [2022-11-18 19:56:41,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 319 transitions. [2022-11-18 19:56:41,094 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 319 transitions. Word has length 94 [2022-11-18 19:56:41,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:56:41,095 INFO L495 AbstractCegarLoop]: Abstraction has 261 states and 319 transitions. [2022-11-18 19:56:41,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-18 19:56:41,095 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 319 transitions. [2022-11-18 19:56:41,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-11-18 19:56:41,096 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:56:41,097 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-18 19:56:41,118 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-18 19:56:41,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:56:41,310 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:56:41,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:56:41,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1621584321, now seen corresponding path program 2 times [2022-11-18 19:56:41,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:56:41,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1235228345] [2022-11-18 19:56:41,311 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 19:56:41,312 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:56:41,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:56:41,313 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:56:41,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-18 19:56:41,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 19:56:41,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:56:41,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-18 19:56:41,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:56:43,940 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 28 proven. 12 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-18 19:56:43,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:56:47,384 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:56:47,384 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-11-18 19:56:47,416 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-11-18 19:56:47,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-11-18 19:56:47,484 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-18 19:56:47,484 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:56:47,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1235228345] [2022-11-18 19:56:47,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1235228345] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:56:47,484 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:56:47,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2022-11-18 19:56:47,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920951091] [2022-11-18 19:56:47,485 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:56:47,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-18 19:56:47,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:56:47,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-18 19:56:47,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2022-11-18 19:56:47,486 INFO L87 Difference]: Start difference. First operand 261 states and 319 transitions. Second operand has 19 states, 19 states have (on average 5.2105263157894735) internal successors, (99), 17 states have internal predecessors, (99), 8 states have call successors, (17), 4 states have call predecessors, (17), 6 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) [2022-11-18 19:56:49,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:56:49,143 INFO L93 Difference]: Finished difference Result 434 states and 530 transitions. [2022-11-18 19:56:49,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-18 19:56:49,147 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.2105263157894735) internal successors, (99), 17 states have internal predecessors, (99), 8 states have call successors, (17), 4 states have call predecessors, (17), 6 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) Word has length 95 [2022-11-18 19:56:49,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:56:49,148 INFO L225 Difference]: With dead ends: 434 [2022-11-18 19:56:49,148 INFO L226 Difference]: Without dead ends: 341 [2022-11-18 19:56:49,149 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 164 SyntacticMatches, 9 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2022-11-18 19:56:49,150 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 65 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 617 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 154 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-18 19:56:49,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 617 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 214 Invalid, 0 Unknown, 154 Unchecked, 1.0s Time] [2022-11-18 19:56:49,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2022-11-18 19:56:49,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 291. [2022-11-18 19:56:49,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 231 states have (on average 1.1601731601731602) internal successors, (268), 239 states have internal predecessors, (268), 28 states have call successors, (28), 19 states have call predecessors, (28), 31 states have return successors, (58), 32 states have call predecessors, (58), 27 states have call successors, (58) [2022-11-18 19:56:49,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 354 transitions. [2022-11-18 19:56:49,216 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 354 transitions. Word has length 95 [2022-11-18 19:56:49,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:56:49,216 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 354 transitions. [2022-11-18 19:56:49,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.2105263157894735) internal successors, (99), 17 states have internal predecessors, (99), 8 states have call successors, (17), 4 states have call predecessors, (17), 6 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) [2022-11-18 19:56:49,217 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 354 transitions. [2022-11-18 19:56:49,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-11-18 19:56:49,218 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:56:49,218 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-18 19:56:49,239 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Ended with exit code 0 [2022-11-18 19:56:49,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:56:49,435 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:56:49,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:56:49,435 INFO L85 PathProgramCache]: Analyzing trace with hash 171442817, now seen corresponding path program 1 times [2022-11-18 19:56:49,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:56:49,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1390358694] [2022-11-18 19:56:49,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:56:49,436 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:56:49,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:56:49,437 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:56:49,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-18 19:56:49,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:56:49,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-18 19:56:49,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:56:51,970 WARN L859 $PredicateComparison]: unable to prove that (or (exists ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_17| (_ BitVec 64)) (|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_15| (_ BitVec 64))) (not (= (_ bv0 64) (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_17|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_15|)))) (exists ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_17| (_ BitVec 64)) (|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_15| (_ BitVec 64))) (not (= (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_17|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_15|) (_ bv0 64))))) is different from true [2022-11-18 19:56:54,103 WARN L859 $PredicateComparison]: unable to prove that (or (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_16| (_ BitVec 64)) (|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_18| (_ BitVec 64))) (not (= (_ bv0 64) (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_18|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_16|)))) (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_16| (_ BitVec 64)) (|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_18| (_ BitVec 64))) (not (= (_ bv0 64) (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_18|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_16|))))) is different from true [2022-11-18 19:56:56,302 WARN L859 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_49| (_ BitVec 64)) (|v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.offset_BEFORE_CALL_39| (_ BitVec 64))) (not (= (_ bv0 64) (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_49|) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.offset_BEFORE_CALL_39|)))) (exists ((|v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_49| (_ BitVec 64)) (|v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.offset_BEFORE_CALL_39| (_ BitVec 64))) (not (= (_ bv0 64) (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_49|) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.offset_BEFORE_CALL_39|))))) is different from true [2022-11-18 19:56:58,481 WARN L859 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_19| (_ BitVec 64)) (|v_ULTIMATE.start_aws_linked_list_end_~list#1.offset_BEFORE_CALL_17| (_ BitVec 64))) (not (= (_ bv0 64) (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_19|) |v_ULTIMATE.start_aws_linked_list_end_~list#1.offset_BEFORE_CALL_17|)))) (exists ((|v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_19| (_ BitVec 64)) (|v_ULTIMATE.start_aws_linked_list_end_~list#1.offset_BEFORE_CALL_17| (_ BitVec 64))) (not (= (_ bv0 64) (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_19|) |v_ULTIMATE.start_aws_linked_list_end_~list#1.offset_BEFORE_CALL_17|))))) is different from true [2022-11-18 19:57:06,683 WARN L233 SmtUtils]: Spent 6.08s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 19:57:14,918 WARN L233 SmtUtils]: Spent 6.10s on a formula simplification that was a NOOP. DAG size: 33 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 19:57:23,191 WARN L233 SmtUtils]: Spent 6.12s on a formula simplification that was a NOOP. DAG size: 33 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 19:57:25,903 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 38 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 7 not checked. [2022-11-18 19:57:25,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:57:28,995 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-11-18 19:57:28,996 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2022-11-18 19:57:29,019 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-11-18 19:57:29,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 12 [2022-11-18 19:57:29,026 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-18 19:57:29,027 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:57:29,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1390358694] [2022-11-18 19:57:29,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1390358694] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:57:29,027 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:57:29,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 22 [2022-11-18 19:57:29,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811964724] [2022-11-18 19:57:29,027 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:57:29,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-18 19:57:29,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:57:29,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-18 19:57:29,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=251, Unknown=8, NotChecked=140, Total=462 [2022-11-18 19:57:29,029 INFO L87 Difference]: Start difference. First operand 291 states and 354 transitions. Second operand has 22 states, 21 states have (on average 4.904761904761905) internal successors, (103), 20 states have internal predecessors, (103), 5 states have call successors, (15), 6 states have call predecessors, (15), 8 states have return successors, (14), 4 states have call predecessors, (14), 5 states have call successors, (14) [2022-11-18 19:57:37,583 WARN L859 $PredicateComparison]: unable to prove that (and (or (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_16| (_ BitVec 64)) (|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_18| (_ BitVec 64))) (not (= (_ bv0 64) (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_18|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_16|)))) (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_16| (_ BitVec 64)) (|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_18| (_ BitVec 64))) (not (= (_ bv0 64) (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_18|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_16|))))) (or (exists ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_17| (_ BitVec 64)) (|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_15| (_ BitVec 64))) (not (= (_ bv0 64) (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_17|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_15|)))) (exists ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_17| (_ BitVec 64)) (|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_15| (_ BitVec 64))) (not (= (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_17|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_15|) (_ bv0 64)))))) is different from true [2022-11-18 19:57:38,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:57:38,598 INFO L93 Difference]: Finished difference Result 399 states and 486 transitions. [2022-11-18 19:57:38,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-18 19:57:38,599 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 4.904761904761905) internal successors, (103), 20 states have internal predecessors, (103), 5 states have call successors, (15), 6 states have call predecessors, (15), 8 states have return successors, (14), 4 states have call predecessors, (14), 5 states have call successors, (14) Word has length 97 [2022-11-18 19:57:38,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:57:38,601 INFO L225 Difference]: With dead ends: 399 [2022-11-18 19:57:38,601 INFO L226 Difference]: Without dead ends: 263 [2022-11-18 19:57:38,602 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 169 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 46.5s TimeCoverageRelationStatistics Valid=112, Invalid=448, Unknown=12, NotChecked=240, Total=812 [2022-11-18 19:57:38,602 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 51 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 385 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-18 19:57:38,602 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 338 Invalid, 661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 254 Invalid, 0 Unknown, 385 Unchecked, 0.9s Time] [2022-11-18 19:57:38,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-11-18 19:57:38,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 239. [2022-11-18 19:57:38,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 188 states have (on average 1.1648936170212767) internal successors, (219), 194 states have internal predecessors, (219), 24 states have call successors, (24), 15 states have call predecessors, (24), 26 states have return successors, (48), 29 states have call predecessors, (48), 23 states have call successors, (48) [2022-11-18 19:57:38,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 291 transitions. [2022-11-18 19:57:38,664 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 291 transitions. Word has length 97 [2022-11-18 19:57:38,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:57:38,665 INFO L495 AbstractCegarLoop]: Abstraction has 239 states and 291 transitions. [2022-11-18 19:57:38,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 4.904761904761905) internal successors, (103), 20 states have internal predecessors, (103), 5 states have call successors, (15), 6 states have call predecessors, (15), 8 states have return successors, (14), 4 states have call predecessors, (14), 5 states have call successors, (14) [2022-11-18 19:57:38,665 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 291 transitions. [2022-11-18 19:57:38,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-11-18 19:57:38,666 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:57:38,667 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:57:38,691 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-11-18 19:57:38,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:57:38,883 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:57:38,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:57:38,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1315913155, now seen corresponding path program 1 times [2022-11-18 19:57:38,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:57:38,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [658496764] [2022-11-18 19:57:38,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:57:38,885 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:57:38,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:57:38,886 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:57:38,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-18 19:57:39,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:57:39,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-18 19:57:39,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:57:39,360 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-18 19:57:39,360 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:57:39,361 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:57:39,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [658496764] [2022-11-18 19:57:39,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [658496764] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:57:39,361 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:57:39,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-18 19:57:39,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953200478] [2022-11-18 19:57:39,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:57:39,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 19:57:39,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:57:39,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 19:57:39,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-11-18 19:57:39,362 INFO L87 Difference]: Start difference. First operand 239 states and 291 transitions. Second operand has 10 states, 9 states have (on average 8.222222222222221) internal successors, (74), 10 states have internal predecessors, (74), 5 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) [2022-11-18 19:57:39,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:57:39,935 INFO L93 Difference]: Finished difference Result 399 states and 492 transitions. [2022-11-18 19:57:39,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-18 19:57:39,937 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 8.222222222222221) internal successors, (74), 10 states have internal predecessors, (74), 5 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) Word has length 97 [2022-11-18 19:57:39,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:57:39,938 INFO L225 Difference]: With dead ends: 399 [2022-11-18 19:57:39,938 INFO L226 Difference]: Without dead ends: 222 [2022-11-18 19:57:39,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-11-18 19:57:39,940 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 77 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 19:57:39,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 425 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-18 19:57:39,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2022-11-18 19:57:40,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 200. [2022-11-18 19:57:40,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 156 states have (on average 1.1153846153846154) internal successors, (174), 160 states have internal predecessors, (174), 22 states have call successors, (22), 15 states have call predecessors, (22), 21 states have return successors, (32), 24 states have call predecessors, (32), 21 states have call successors, (32) [2022-11-18 19:57:40,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 228 transitions. [2022-11-18 19:57:40,002 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 228 transitions. Word has length 97 [2022-11-18 19:57:40,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:57:40,003 INFO L495 AbstractCegarLoop]: Abstraction has 200 states and 228 transitions. [2022-11-18 19:57:40,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 8.222222222222221) internal successors, (74), 10 states have internal predecessors, (74), 5 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) [2022-11-18 19:57:40,003 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 228 transitions. [2022-11-18 19:57:40,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-11-18 19:57:40,004 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:57:40,004 INFO L195 NwaCegarLoop]: 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] [2022-11-18 19:57:40,035 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-11-18 19:57:40,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:57:40,220 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:57:40,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:57:40,221 INFO L85 PathProgramCache]: Analyzing trace with hash 2047426688, now seen corresponding path program 2 times [2022-11-18 19:57:40,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:57:40,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1570304134] [2022-11-18 19:57:40,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 19:57:40,222 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:57:40,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:57:40,223 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:57:40,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-18 19:57:40,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 19:57:40,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:57:40,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-18 19:57:40,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:57:40,606 INFO L350 Elim1Store]: Elim1 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 11 treesize of output 14 [2022-11-18 19:57:40,610 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 19:57:42,024 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-18 19:57:42,025 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:57:42,025 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:57:42,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1570304134] [2022-11-18 19:57:42,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1570304134] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:57:42,025 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:57:42,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-18 19:57:42,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461633143] [2022-11-18 19:57:42,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:57:42,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 19:57:42,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:57:42,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 19:57:42,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-11-18 19:57:42,027 INFO L87 Difference]: Start difference. First operand 200 states and 228 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 12 states have internal predecessors, (53), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-18 19:57:42,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:57:42,571 INFO L93 Difference]: Finished difference Result 432 states and 496 transitions. [2022-11-18 19:57:42,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-18 19:57:42,571 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 12 states have internal predecessors, (53), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 100 [2022-11-18 19:57:42,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:57:42,573 INFO L225 Difference]: With dead ends: 432 [2022-11-18 19:57:42,574 INFO L226 Difference]: Without dead ends: 366 [2022-11-18 19:57:42,574 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 82 SyntacticMatches, 8 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-11-18 19:57:42,575 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 27 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 97 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 19:57:42,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 483 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 61 Invalid, 0 Unknown, 97 Unchecked, 0.3s Time] [2022-11-18 19:57:42,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2022-11-18 19:57:42,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 350. [2022-11-18 19:57:42,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 275 states have (on average 1.1127272727272728) internal successors, (306), 282 states have internal predecessors, (306), 37 states have call successors, (37), 26 states have call predecessors, (37), 37 states have return successors, (54), 41 states have call predecessors, (54), 36 states have call successors, (54) [2022-11-18 19:57:42,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 397 transitions. [2022-11-18 19:57:42,679 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 397 transitions. Word has length 100 [2022-11-18 19:57:42,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:57:42,679 INFO L495 AbstractCegarLoop]: Abstraction has 350 states and 397 transitions. [2022-11-18 19:57:42,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 12 states have internal predecessors, (53), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-18 19:57:42,680 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 397 transitions. [2022-11-18 19:57:42,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-18 19:57:42,681 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:57:42,681 INFO L195 NwaCegarLoop]: 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, 1, 1] [2022-11-18 19:57:42,699 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-11-18 19:57:42,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:57:42,895 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:57:42,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:57:42,895 INFO L85 PathProgramCache]: Analyzing trace with hash 364122814, now seen corresponding path program 2 times [2022-11-18 19:57:42,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:57:42,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1815706329] [2022-11-18 19:57:42,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 19:57:42,896 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:57:42,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:57:42,897 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:57:42,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-18 19:57:43,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 19:57:43,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:57:43,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-18 19:57:43,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:57:43,415 INFO L321 Elim1Store]: treesize reduction 30, result has 38.8 percent of original size [2022-11-18 19:57:43,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 78 [2022-11-18 19:57:43,428 INFO L350 Elim1Store]: Elim1 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 10 treesize of output 9 [2022-11-18 19:57:43,440 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 15 [2022-11-18 19:57:43,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 25 [2022-11-18 19:57:43,483 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 19:57:44,782 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-18 19:57:44,783 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:57:44,783 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:57:44,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1815706329] [2022-11-18 19:57:44,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1815706329] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:57:44,783 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:57:44,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-18 19:57:44,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004176517] [2022-11-18 19:57:44,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:57:44,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-18 19:57:44,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:57:44,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-18 19:57:44,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-11-18 19:57:44,785 INFO L87 Difference]: Start difference. First operand 350 states and 397 transitions. Second operand has 11 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-18 19:57:45,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:57:45,158 INFO L93 Difference]: Finished difference Result 456 states and 520 transitions. [2022-11-18 19:57:45,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-18 19:57:45,163 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 102 [2022-11-18 19:57:45,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:57:45,165 INFO L225 Difference]: With dead ends: 456 [2022-11-18 19:57:45,166 INFO L226 Difference]: Without dead ends: 390 [2022-11-18 19:57:45,166 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 85 SyntacticMatches, 8 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-11-18 19:57:45,167 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 24 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 19:57:45,167 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 447 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 53 Unchecked, 0.2s Time] [2022-11-18 19:57:45,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2022-11-18 19:57:45,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 218. [2022-11-18 19:57:45,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 170 states have (on average 1.1176470588235294) internal successors, (190), 174 states have internal predecessors, (190), 24 states have call successors, (24), 17 states have call predecessors, (24), 23 states have return successors, (31), 26 states have call predecessors, (31), 23 states have call successors, (31) [2022-11-18 19:57:45,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 245 transitions. [2022-11-18 19:57:45,235 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 245 transitions. Word has length 102 [2022-11-18 19:57:45,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:57:45,235 INFO L495 AbstractCegarLoop]: Abstraction has 218 states and 245 transitions. [2022-11-18 19:57:45,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-18 19:57:45,236 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 245 transitions. [2022-11-18 19:57:45,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-18 19:57:45,237 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:57:45,237 INFO L195 NwaCegarLoop]: 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] [2022-11-18 19:57:45,255 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-11-18 19:57:45,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:57:45,451 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:57:45,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:57:45,451 INFO L85 PathProgramCache]: Analyzing trace with hash -2065682137, now seen corresponding path program 1 times [2022-11-18 19:57:45,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:57:45,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1709428843] [2022-11-18 19:57:45,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:57:45,453 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:57:45,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:57:45,454 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:57:45,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-18 19:57:45,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:57:45,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-18 19:57:45,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:58:32,769 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 55 proven. 40 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-18 19:58:32,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:58:54,973 INFO L321 Elim1Store]: treesize reduction 17, result has 82.8 percent of original size [2022-11-18 19:58:54,973 INFO L350 Elim1Store]: Elim1 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 80 treesize of output 129 [2022-11-18 19:58:55,677 INFO L321 Elim1Store]: treesize reduction 8, result has 88.1 percent of original size [2022-11-18 19:58:55,677 INFO L350 Elim1Store]: Elim1 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 102 treesize of output 132 [2022-11-18 19:59:01,940 INFO L321 Elim1Store]: treesize reduction 17, result has 82.8 percent of original size [2022-11-18 19:59:01,940 INFO L350 Elim1Store]: Elim1 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 72 treesize of output 125 [2022-11-18 19:59:02,453 INFO L321 Elim1Store]: treesize reduction 8, result has 88.1 percent of original size [2022-11-18 19:59:02,453 INFO L350 Elim1Store]: Elim1 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 102 treesize of output 132 [2022-11-18 19:59:03,301 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 24 proven. 55 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-18 19:59:03,301 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:59:03,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1709428843] [2022-11-18 19:59:03,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1709428843] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:59:03,302 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:59:03,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 21] total 42 [2022-11-18 19:59:03,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800024571] [2022-11-18 19:59:03,302 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:59:03,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-18 19:59:03,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:59:03,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-18 19:59:03,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1557, Unknown=9, NotChecked=0, Total=1722 [2022-11-18 19:59:03,305 INFO L87 Difference]: Start difference. First operand 218 states and 245 transitions. Second operand has 42 states, 40 states have (on average 3.875) internal successors, (155), 35 states have internal predecessors, (155), 13 states have call successors, (21), 4 states have call predecessors, (21), 11 states have return successors, (20), 13 states have call predecessors, (20), 12 states have call successors, (20) [2022-11-18 19:59:11,303 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 19:59:15,344 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 19:59:17,400 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 19:59:39,242 WARN L233 SmtUtils]: Spent 20.36s on a formula simplification. DAG size of input: 67 DAG size of output: 50 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 19:59:42,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:59:42,789 INFO L93 Difference]: Finished difference Result 384 states and 442 transitions. [2022-11-18 19:59:42,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-18 19:59:42,791 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 40 states have (on average 3.875) internal successors, (155), 35 states have internal predecessors, (155), 13 states have call successors, (21), 4 states have call predecessors, (21), 11 states have return successors, (20), 13 states have call predecessors, (20), 12 states have call successors, (20) Word has length 113 [2022-11-18 19:59:42,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:59:42,792 INFO L225 Difference]: With dead ends: 384 [2022-11-18 19:59:42,792 INFO L226 Difference]: Without dead ends: 324 [2022-11-18 19:59:42,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 188 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 874 ImplicationChecksByTransitivity, 89.0s TimeCoverageRelationStatistics Valid=357, Invalid=3538, Unknown=11, NotChecked=0, Total=3906 [2022-11-18 19:59:42,794 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 154 mSDsluCounter, 1402 mSDsCounter, 0 mSdLazyCounter, 672 mSolverCounterSat, 27 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 1501 SdHoareTripleChecker+Invalid, 1220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 672 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 518 IncrementalHoareTripleChecker+Unchecked, 9.4s IncrementalHoareTripleChecker+Time [2022-11-18 19:59:42,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 1501 Invalid, 1220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 672 Invalid, 3 Unknown, 518 Unchecked, 9.4s Time] [2022-11-18 19:59:42,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2022-11-18 19:59:42,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 222. [2022-11-18 19:59:42,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 175 states have (on average 1.12) internal successors, (196), 179 states have internal predecessors, (196), 22 states have call successors, (22), 18 states have call predecessors, (22), 24 states have return successors, (28), 24 states have call predecessors, (28), 21 states have call successors, (28) [2022-11-18 19:59:42,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 246 transitions. [2022-11-18 19:59:42,876 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 246 transitions. Word has length 113 [2022-11-18 19:59:42,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:59:42,876 INFO L495 AbstractCegarLoop]: Abstraction has 222 states and 246 transitions. [2022-11-18 19:59:42,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 40 states have (on average 3.875) internal successors, (155), 35 states have internal predecessors, (155), 13 states have call successors, (21), 4 states have call predecessors, (21), 11 states have return successors, (20), 13 states have call predecessors, (20), 12 states have call successors, (20) [2022-11-18 19:59:42,877 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 246 transitions. [2022-11-18 19:59:42,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-18 19:59:42,878 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:59:42,878 INFO L195 NwaCegarLoop]: 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] [2022-11-18 19:59:42,904 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-11-18 19:59:43,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:59:43,099 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:59:43,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:59:43,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1112769404, now seen corresponding path program 1 times [2022-11-18 19:59:43,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:59:43,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2089845395] [2022-11-18 19:59:43,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:59:43,100 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:59:43,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:59:43,102 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:59:43,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-18 19:59:43,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:59:43,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-18 19:59:43,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:59:43,520 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-11-18 19:59:43,520 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:59:43,520 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:59:43,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2089845395] [2022-11-18 19:59:43,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2089845395] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:59:43,520 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:59:43,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-18 19:59:43,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796434578] [2022-11-18 19:59:43,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:59:43,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-18 19:59:43,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:59:43,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-18 19:59:43,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-18 19:59:43,522 INFO L87 Difference]: Start difference. First operand 222 states and 246 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) [2022-11-18 19:59:43,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:59:43,679 INFO L93 Difference]: Finished difference Result 239 states and 263 transitions. [2022-11-18 19:59:43,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 19:59:43,680 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 [2022-11-18 19:59:43,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:59:43,681 INFO L225 Difference]: With dead ends: 239 [2022-11-18 19:59:43,682 INFO L226 Difference]: Without dead ends: 237 [2022-11-18 19:59:43,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-11-18 19:59:43,683 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 10 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 498 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 19:59:43,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 498 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 19:59:43,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-11-18 19:59:43,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 230. [2022-11-18 19:59:43,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 180 states have (on average 1.1166666666666667) internal successors, (201), 185 states have internal predecessors, (201), 23 states have call successors, (23), 19 states have call predecessors, (23), 26 states have return successors, (30), 25 states have call predecessors, (30), 22 states have call successors, (30) [2022-11-18 19:59:43,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 254 transitions. [2022-11-18 19:59:43,759 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 254 transitions. Word has length 116 [2022-11-18 19:59:43,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:59:43,760 INFO L495 AbstractCegarLoop]: Abstraction has 230 states and 254 transitions. [2022-11-18 19:59:43,760 INFO L496 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) [2022-11-18 19:59:43,760 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 254 transitions. [2022-11-18 19:59:43,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-11-18 19:59:43,761 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:59:43,761 INFO L195 NwaCegarLoop]: 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] [2022-11-18 19:59:43,779 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-11-18 19:59:43,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:59:43,975 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:59:43,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:59:43,975 INFO L85 PathProgramCache]: Analyzing trace with hash 610448605, now seen corresponding path program 1 times [2022-11-18 19:59:43,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:59:43,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1795002404] [2022-11-18 19:59:43,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:59:43,976 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:59:43,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:59:43,977 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:59:43,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-11-18 19:59:44,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:59:44,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-18 19:59:44,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:59:44,453 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-11-18 19:59:44,453 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:59:44,454 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:59:44,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1795002404] [2022-11-18 19:59:44,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1795002404] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:59:44,454 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:59:44,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 19:59:44,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738044314] [2022-11-18 19:59:44,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:59:44,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 19:59:44,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:59:44,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 19:59:44,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:59:44,455 INFO L87 Difference]: Start difference. First operand 230 states and 254 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) [2022-11-18 19:59:44,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:59:44,597 INFO L93 Difference]: Finished difference Result 236 states and 259 transitions. [2022-11-18 19:59:44,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 19:59:44,604 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 [2022-11-18 19:59:44,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:59:44,605 INFO L225 Difference]: With dead ends: 236 [2022-11-18 19:59:44,605 INFO L226 Difference]: Without dead ends: 234 [2022-11-18 19:59:44,605 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-18 19:59:44,606 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 7 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 19:59:44,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 280 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 19:59:44,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-11-18 19:59:44,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 234. [2022-11-18 19:59:44,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 183 states have (on average 1.1147540983606556) internal successors, (204), 188 states have internal predecessors, (204), 23 states have call successors, (23), 20 states have call predecessors, (23), 27 states have return successors, (30), 25 states have call predecessors, (30), 22 states have call successors, (30) [2022-11-18 19:59:44,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 257 transitions. [2022-11-18 19:59:44,661 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 257 transitions. Word has length 122 [2022-11-18 19:59:44,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:59:44,662 INFO L495 AbstractCegarLoop]: Abstraction has 234 states and 257 transitions. [2022-11-18 19:59:44,662 INFO L496 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) [2022-11-18 19:59:44,662 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 257 transitions. [2022-11-18 19:59:44,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-18 19:59:44,663 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:59:44,664 INFO L195 NwaCegarLoop]: 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] [2022-11-18 19:59:44,683 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-11-18 19:59:44,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:59:44,877 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:59:44,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:59:44,878 INFO L85 PathProgramCache]: Analyzing trace with hash 594113950, now seen corresponding path program 2 times [2022-11-18 19:59:44,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:59:44,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1423606124] [2022-11-18 19:59:44,878 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 19:59:44,878 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:59:44,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:59:44,879 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:59:44,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-11-18 19:59:45,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 19:59:45,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:59:45,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-18 19:59:45,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:00:11,910 WARN L233 SmtUtils]: Spent 10.07s on a formula simplification that was a NOOP. DAG size: 28 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 20:00:12,354 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 84 proven. 38 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-18 20:00:12,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:00:15,631 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:00:15,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 29 [2022-11-18 20:00:15,674 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:00:15,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 27 [2022-11-18 20:00:15,894 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 26 proven. 51 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-11-18 20:00:15,894 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:00:15,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1423606124] [2022-11-18 20:00:15,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1423606124] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:00:15,895 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:00:15,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 25 [2022-11-18 20:00:15,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976376848] [2022-11-18 20:00:15,895 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:00:15,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-18 20:00:15,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:00:15,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-18 20:00:15,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=498, Unknown=7, NotChecked=0, Total=600 [2022-11-18 20:00:15,897 INFO L87 Difference]: Start difference. First operand 234 states and 257 transitions. Second operand has 25 states, 25 states have (on average 5.48) internal successors, (137), 23 states have internal predecessors, (137), 13 states have call successors, (22), 4 states have call predecessors, (22), 6 states have return successors, (21), 13 states have call predecessors, (21), 12 states have call successors, (21) [2022-11-18 20:00:28,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:00:28,739 INFO L93 Difference]: Finished difference Result 508 states and 576 transitions. [2022-11-18 20:00:28,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-18 20:00:28,742 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.48) internal successors, (137), 23 states have internal predecessors, (137), 13 states have call successors, (22), 4 states have call predecessors, (22), 6 states have return successors, (21), 13 states have call predecessors, (21), 12 states have call successors, (21) Word has length 124 [2022-11-18 20:00:28,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:00:28,744 INFO L225 Difference]: With dead ends: 508 [2022-11-18 20:00:28,744 INFO L226 Difference]: Without dead ends: 381 [2022-11-18 20:00:28,745 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 219 SyntacticMatches, 8 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 37.0s TimeCoverageRelationStatistics Valid=167, Invalid=944, Unknown=11, NotChecked=0, Total=1122 [2022-11-18 20:00:28,745 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 85 mSDsluCounter, 972 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 1081 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 178 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:00:28,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 1081 Invalid, 683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 485 Invalid, 0 Unknown, 178 Unchecked, 3.1s Time] [2022-11-18 20:00:28,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2022-11-18 20:00:28,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 325. [2022-11-18 20:00:28,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 255 states have (on average 1.1019607843137256) internal successors, (281), 263 states have internal predecessors, (281), 34 states have call successors, (34), 28 states have call predecessors, (34), 35 states have return successors, (42), 33 states have call predecessors, (42), 33 states have call successors, (42) [2022-11-18 20:00:28,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 357 transitions. [2022-11-18 20:00:28,838 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 357 transitions. Word has length 124 [2022-11-18 20:00:28,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:00:28,839 INFO L495 AbstractCegarLoop]: Abstraction has 325 states and 357 transitions. [2022-11-18 20:00:28,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.48) internal successors, (137), 23 states have internal predecessors, (137), 13 states have call successors, (22), 4 states have call predecessors, (22), 6 states have return successors, (21), 13 states have call predecessors, (21), 12 states have call successors, (21) [2022-11-18 20:00:28,839 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 357 transitions. [2022-11-18 20:00:28,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-11-18 20:00:28,841 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:00:28,841 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 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, 1] [2022-11-18 20:00:28,867 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-11-18 20:00:29,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:00:29,061 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:00:29,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:00:29,061 INFO L85 PathProgramCache]: Analyzing trace with hash -52974209, now seen corresponding path program 1 times [2022-11-18 20:00:29,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:00:29,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1278307923] [2022-11-18 20:00:29,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:00:29,062 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:00:29,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:00:29,063 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:00:29,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-11-18 20:00:29,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:00:29,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-18 20:00:29,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:00:35,484 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 169 proven. 43 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-18 20:00:35,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:00:56,144 INFO L321 Elim1Store]: treesize reduction 14, result has 6.7 percent of original size [2022-11-18 20:00:56,144 INFO L350 Elim1Store]: Elim1 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 13 [2022-11-18 20:01:01,326 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:01:01,326 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 36 [2022-11-18 20:01:02,358 INFO L321 Elim1Store]: treesize reduction 4, result has 93.8 percent of original size [2022-11-18 20:01:02,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 76 [2022-11-18 20:01:03,371 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 19 proven. 115 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-11-18 20:01:03,371 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:01:03,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1278307923] [2022-11-18 20:01:03,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1278307923] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:01:03,372 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:01:03,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2022-11-18 20:01:03,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762391352] [2022-11-18 20:01:03,372 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:01:03,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-18 20:01:03,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:01:03,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-18 20:01:03,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1416, Unknown=6, NotChecked=0, Total=1560 [2022-11-18 20:01:03,374 INFO L87 Difference]: Start difference. First operand 325 states and 357 transitions. Second operand has 40 states, 38 states have (on average 4.473684210526316) internal successors, (170), 37 states have internal predecessors, (170), 15 states have call successors, (22), 3 states have call predecessors, (22), 9 states have return successors, (22), 13 states have call predecessors, (22), 15 states have call successors, (22) [2022-11-18 20:01:19,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:01:19,583 INFO L93 Difference]: Finished difference Result 700 states and 838 transitions. [2022-11-18 20:01:19,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-18 20:01:19,584 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 38 states have (on average 4.473684210526316) internal successors, (170), 37 states have internal predecessors, (170), 15 states have call successors, (22), 3 states have call predecessors, (22), 9 states have return successors, (22), 13 states have call predecessors, (22), 15 states have call successors, (22) Word has length 145 [2022-11-18 20:01:19,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:01:19,587 INFO L225 Difference]: With dead ends: 700 [2022-11-18 20:01:19,587 INFO L226 Difference]: Without dead ends: 580 [2022-11-18 20:01:19,588 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 256 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 680 ImplicationChecksByTransitivity, 42.4s TimeCoverageRelationStatistics Valid=323, Invalid=2974, Unknown=9, NotChecked=0, Total=3306 [2022-11-18 20:01:19,589 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 220 mSDsluCounter, 1990 mSDsCounter, 0 mSdLazyCounter, 968 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 2103 SdHoareTripleChecker+Invalid, 2022 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 968 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 994 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-11-18 20:01:19,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 2103 Invalid, 2022 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 968 Invalid, 0 Unknown, 994 Unchecked, 3.8s Time] [2022-11-18 20:01:19,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2022-11-18 20:01:19,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 430. [2022-11-18 20:01:19,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 332 states have (on average 1.1174698795180722) internal successors, (371), 346 states have internal predecessors, (371), 51 states have call successors, (51), 32 states have call predecessors, (51), 46 states have return successors, (78), 51 states have call predecessors, (78), 50 states have call successors, (78) [2022-11-18 20:01:19,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 500 transitions. [2022-11-18 20:01:19,710 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 500 transitions. Word has length 145 [2022-11-18 20:01:19,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:01:19,711 INFO L495 AbstractCegarLoop]: Abstraction has 430 states and 500 transitions. [2022-11-18 20:01:19,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 38 states have (on average 4.473684210526316) internal successors, (170), 37 states have internal predecessors, (170), 15 states have call successors, (22), 3 states have call predecessors, (22), 9 states have return successors, (22), 13 states have call predecessors, (22), 15 states have call successors, (22) [2022-11-18 20:01:19,711 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 500 transitions. [2022-11-18 20:01:19,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-11-18 20:01:19,713 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:01:19,714 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 7, 6, 5, 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, 1] [2022-11-18 20:01:19,733 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Ended with exit code 0 [2022-11-18 20:01:19,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:01:19,927 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:01:19,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:01:19,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1953946276, now seen corresponding path program 2 times [2022-11-18 20:01:19,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:01:19,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1649901102] [2022-11-18 20:01:19,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:01:19,928 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:01:19,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:01:19,929 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:01:19,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95020206-82ce-4221-bd4b-8d48f434c820/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-11-18 20:01:20,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:01:20,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:01:20,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 57 conjunts are in the unsatisfiable core [2022-11-18 20:01:20,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:01:23,404 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_39| (_ BitVec 64)) (|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_42| (_ BitVec 64))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_42|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_39|)) (.cse3 (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_42|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_39|))) (let ((.cse1 (select (select |c_#memory_$Pointer$.base| .cse0) .cse3)) (.cse2 (bvadd (_ bv8 64) (select (select |c_#memory_$Pointer$.offset| .cse0) .cse3)))) (and (= .cse0 (select (select |c_#memory_$Pointer$.base| .cse1) .cse2)) (= .cse3 (select (select |c_#memory_$Pointer$.offset| .cse1) .cse2)))))) is different from true [2022-11-18 20:01:25,918 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_78| (_ BitVec 64)) (|v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.offset_BEFORE_CALL_65| (_ BitVec 64))) (let ((.cse2 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_78|) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.offset_BEFORE_CALL_65|)) (.cse3 (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_78|) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.offset_BEFORE_CALL_65|))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| .cse2) .cse3)) (.cse1 (bvadd (_ bv8 64) (select (select |c_#memory_$Pointer$.offset| .cse2) .cse3)))) (and (= (select (select |c_#memory_$Pointer$.base| .cse0) .cse1) .cse2) (= .cse3 (select (select |c_#memory_$Pointer$.offset| .cse0) .cse1)))))) is different from true [2022-11-18 20:01:28,360 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_45| (_ BitVec 64)) (|v_ULTIMATE.start_aws_linked_list_end_~list#1.offset_BEFORE_CALL_42| (_ BitVec 64))) (let ((.cse3 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_45|) |v_ULTIMATE.start_aws_linked_list_end_~list#1.offset_BEFORE_CALL_42|)) (.cse2 (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_45|) |v_ULTIMATE.start_aws_linked_list_end_~list#1.offset_BEFORE_CALL_42|))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| .cse3) .cse2)) (.cse1 (bvadd (_ bv8 64) (select (select |c_#memory_$Pointer$.offset| .cse3) .cse2)))) (and (= (select (select |c_#memory_$Pointer$.offset| .cse0) .cse1) .cse2) (= (select (select |c_#memory_$Pointer$.base| .cse0) .cse1) .cse3))))) is different from true [2022-11-18 20:02:13,900 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 197 proven. 43 refuted. 0 times theorem prover too weak. 19 trivial. 38 not checked. [2022-11-18 20:02:13,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:02:58,672 WARN L233 SmtUtils]: Spent 11.71s on a formula simplification that was a NOOP. DAG size: 41 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 20:03:11,389 WARN L233 SmtUtils]: Spent 11.43s on a formula simplification that was a NOOP. DAG size: 40 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)