./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/memset_using_uint64_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e63d4984-df40-4cf6-b7df-5b29db263374/bin/uautomizer-J5u9QxTXDZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e63d4984-df40-4cf6-b7df-5b29db263374/bin/uautomizer-J5u9QxTXDZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e63d4984-df40-4cf6-b7df-5b29db263374/bin/uautomizer-J5u9QxTXDZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e63d4984-df40-4cf6-b7df-5b29db263374/bin/uautomizer-J5u9QxTXDZ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/aws-c-common/memset_using_uint64_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e63d4984-df40-4cf6-b7df-5b29db263374/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e63d4984-df40-4cf6-b7df-5b29db263374/bin/uautomizer-J5u9QxTXDZ --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 9ff439c9da308e48e314eaeb6f620d0560f5430b3c601570b5afd8d635a5b965 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-dbf71c6-m [2022-10-17 10:35:27,863 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 10:35:27,869 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 10:35:27,902 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 10:35:27,903 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 10:35:27,905 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 10:35:27,906 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 10:35:27,909 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 10:35:27,911 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 10:35:27,913 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 10:35:27,914 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 10:35:27,916 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 10:35:27,916 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 10:35:27,918 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 10:35:27,919 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 10:35:27,921 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 10:35:27,922 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 10:35:27,923 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 10:35:27,925 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 10:35:27,928 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 10:35:27,930 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 10:35:27,931 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 10:35:27,933 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 10:35:27,934 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 10:35:27,939 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 10:35:27,940 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 10:35:27,940 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 10:35:27,941 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 10:35:27,942 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 10:35:27,943 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 10:35:27,944 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 10:35:27,945 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 10:35:27,946 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 10:35:27,947 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 10:35:27,948 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 10:35:27,948 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 10:35:27,949 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 10:35:27,950 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 10:35:27,950 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 10:35:27,951 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 10:35:27,952 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 10:35:27,952 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e63d4984-df40-4cf6-b7df-5b29db263374/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-10-17 10:35:27,977 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 10:35:27,977 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 10:35:27,978 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 10:35:27,978 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 10:35:27,978 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 10:35:27,979 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 10:35:27,979 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-17 10:35:27,980 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-17 10:35:27,980 INFO L138 SettingsManager]: * Use SBE=true [2022-10-17 10:35:27,980 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 10:35:27,980 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 10:35:27,981 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 10:35:27,981 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 10:35:27,981 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 10:35:27,981 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 10:35:27,981 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 10:35:27,982 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 10:35:27,982 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 10:35:27,982 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 10:35:27,982 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-17 10:35:27,983 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 10:35:27,983 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:35:27,983 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 10:35:27,983 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 10:35:27,984 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 10:35:27,984 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-17 10:35:27,984 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 10:35:27,984 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-10-17 10:35:27,984 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-10-17 10:35:27,985 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 10:35:27,985 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_e63d4984-df40-4cf6-b7df-5b29db263374/bin/uautomizer-J5u9QxTXDZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e63d4984-df40-4cf6-b7df-5b29db263374/bin/uautomizer-J5u9QxTXDZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9ff439c9da308e48e314eaeb6f620d0560f5430b3c601570b5afd8d635a5b965 [2022-10-17 10:35:28,244 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 10:35:28,268 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 10:35:28,270 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 10:35:28,271 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 10:35:28,274 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 10:35:28,275 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e63d4984-df40-4cf6-b7df-5b29db263374/bin/uautomizer-J5u9QxTXDZ/../../sv-benchmarks/c/aws-c-common/memset_using_uint64_harness.i [2022-10-17 10:35:28,366 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e63d4984-df40-4cf6-b7df-5b29db263374/bin/uautomizer-J5u9QxTXDZ/data/f5c511e0f/9acd620fdcb3480ab917393032a20754/FLAG1e0f0b90f [2022-10-17 10:35:29,029 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 10:35:29,030 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e63d4984-df40-4cf6-b7df-5b29db263374/sv-benchmarks/c/aws-c-common/memset_using_uint64_harness.i [2022-10-17 10:35:29,064 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e63d4984-df40-4cf6-b7df-5b29db263374/bin/uautomizer-J5u9QxTXDZ/data/f5c511e0f/9acd620fdcb3480ab917393032a20754/FLAG1e0f0b90f [2022-10-17 10:35:29,178 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e63d4984-df40-4cf6-b7df-5b29db263374/bin/uautomizer-J5u9QxTXDZ/data/f5c511e0f/9acd620fdcb3480ab917393032a20754 [2022-10-17 10:35:29,182 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 10:35:29,184 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 10:35:29,189 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 10:35:29,189 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 10:35:29,192 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 10:35:29,193 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:35:29" (1/1) ... [2022-10-17 10:35:29,195 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@586b4594 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:35:29, skipping insertion in model container [2022-10-17 10:35:29,195 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:35:29" (1/1) ... [2022-10-17 10:35:29,202 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 10:35:29,320 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 10:35:29,581 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e63d4984-df40-4cf6-b7df-5b29db263374/sv-benchmarks/c/aws-c-common/memset_using_uint64_harness.i[4493,4506] [2022-10-17 10:35:29,587 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e63d4984-df40-4cf6-b7df-5b29db263374/sv-benchmarks/c/aws-c-common/memset_using_uint64_harness.i[4553,4566] [2022-10-17 10:35:30,297 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 10:35:30,298 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 10:35:30,298 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 10:35:30,299 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 10:35:30,301 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 10:35:30,316 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 10:35:30,316 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 10:35:30,319 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 10:35:30,319 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 10:35:30,321 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 10:35:30,323 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 10:35:30,323 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 10:35:30,324 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 10:35:30,498 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-10-17 10:35:30,500 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-10-17 10:35:30,501 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-10-17 10:35:30,502 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-10-17 10:35:30,504 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-10-17 10:35:30,505 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-10-17 10:35:30,506 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-10-17 10:35:30,510 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-10-17 10:35:30,517 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-10-17 10:35:30,518 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-10-17 10:35:30,589 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:35:30,602 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 10:35:30,616 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e63d4984-df40-4cf6-b7df-5b29db263374/sv-benchmarks/c/aws-c-common/memset_using_uint64_harness.i[4493,4506] [2022-10-17 10:35:30,617 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e63d4984-df40-4cf6-b7df-5b29db263374/sv-benchmarks/c/aws-c-common/memset_using_uint64_harness.i[4553,4566] [2022-10-17 10:35:30,685 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 10:35:30,685 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 10:35:30,686 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 10:35:30,687 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 10:35:30,688 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 10:35:30,718 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 10:35:30,719 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 10:35:30,720 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 10:35:30,720 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 10:35:30,722 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 10:35:30,723 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 10:35:30,723 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 10:35:30,724 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 10:35:30,805 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-10-17 10:35:30,809 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-10-17 10:35:30,810 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-10-17 10:35:30,811 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-10-17 10:35:30,812 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-10-17 10:35:30,813 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-10-17 10:35:30,813 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-10-17 10:35:30,814 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-10-17 10:35:30,814 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-10-17 10:35:30,815 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-10-17 10:35:30,863 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:35:31,077 INFO L208 MainTranslator]: Completed translation [2022-10-17 10:35:31,078 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:35:31 WrapperNode [2022-10-17 10:35:31,078 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 10:35:31,079 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 10:35:31,079 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 10:35:31,079 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 10:35:31,087 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:35:31" (1/1) ... [2022-10-17 10:35:31,179 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:35:31" (1/1) ... [2022-10-17 10:35:31,246 INFO L138 Inliner]: procedures = 592, calls = 625, calls flagged for inlining = 38, calls inlined = 6, statements flattened = 123 [2022-10-17 10:35:31,247 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 10:35:31,248 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 10:35:31,248 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 10:35:31,249 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 10:35:31,258 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:35:31" (1/1) ... [2022-10-17 10:35:31,258 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:35:31" (1/1) ... [2022-10-17 10:35:31,269 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:35:31" (1/1) ... [2022-10-17 10:35:31,270 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:35:31" (1/1) ... [2022-10-17 10:35:31,297 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:35:31" (1/1) ... [2022-10-17 10:35:31,312 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:35:31" (1/1) ... [2022-10-17 10:35:31,315 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:35:31" (1/1) ... [2022-10-17 10:35:31,318 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:35:31" (1/1) ... [2022-10-17 10:35:31,323 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 10:35:31,330 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 10:35:31,330 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 10:35:31,331 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 10:35:31,332 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:35:31" (1/1) ... [2022-10-17 10:35:31,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:35:31,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e63d4984-df40-4cf6-b7df-5b29db263374/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:35:31,371 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e63d4984-df40-4cf6-b7df-5b29db263374/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 10:35:31,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e63d4984-df40-4cf6-b7df-5b29db263374/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 10:35:31,420 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-17 10:35:31,420 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-17 10:35:31,420 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-10-17 10:35:31,421 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-10-17 10:35:31,421 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 10:35:31,421 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 10:35:31,421 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 10:35:31,421 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-10-17 10:35:31,421 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-10-17 10:35:31,421 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-17 10:35:31,422 INFO L130 BoogieDeclarations]: Found specification of procedure assert_all_bytes_are [2022-10-17 10:35:31,422 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_all_bytes_are [2022-10-17 10:35:31,422 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2022-10-17 10:35:31,422 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2022-10-17 10:35:31,422 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-17 10:35:31,422 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 10:35:31,713 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 10:35:31,719 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 10:35:32,186 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 10:35:32,194 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 10:35:32,194 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-10-17 10:35:32,196 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:35:32 BoogieIcfgContainer [2022-10-17 10:35:32,196 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 10:35:32,199 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 10:35:32,199 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 10:35:32,203 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 10:35:32,203 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 10:35:29" (1/3) ... [2022-10-17 10:35:32,204 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@628195e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:35:32, skipping insertion in model container [2022-10-17 10:35:32,204 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:35:31" (2/3) ... [2022-10-17 10:35:32,205 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@628195e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:35:32, skipping insertion in model container [2022-10-17 10:35:32,205 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:35:32" (3/3) ... [2022-10-17 10:35:32,206 INFO L112 eAbstractionObserver]: Analyzing ICFG memset_using_uint64_harness.i [2022-10-17 10:35:32,225 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 10:35:32,226 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 10:35:32,278 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 10:35:32,286 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;@503e386, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 10:35:32,286 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-17 10:35:32,290 INFO L276 IsEmpty]: Start isEmpty. Operand has 70 states, 53 states have (on average 1.3396226415094339) internal successors, (71), 54 states have internal predecessors, (71), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-10-17 10:35:32,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-10-17 10:35:32,299 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:35:32,300 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:35:32,301 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:35:32,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:35:32,306 INFO L85 PathProgramCache]: Analyzing trace with hash -1569633619, now seen corresponding path program 1 times [2022-10-17 10:35:32,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:35:32,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016145191] [2022-10-17 10:35:32,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:35:32,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:35:32,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:35:32,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:35:32,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:35:32,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-10-17 10:35:32,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:35:32,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-10-17 10:35:32,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:35:32,949 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-10-17 10:35:32,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:35:32,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016145191] [2022-10-17 10:35:32,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016145191] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:35:32,951 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:35:32,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 10:35:32,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392384733] [2022-10-17 10:35:32,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:35:32,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-10-17 10:35:32,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:35:32,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-10-17 10:35:32,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-17 10:35:32,999 INFO L87 Difference]: Start difference. First operand has 70 states, 53 states have (on average 1.3396226415094339) internal successors, (71), 54 states have internal predecessors, (71), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 2 states, 2 states have (on average 16.0) internal successors, (32), 2 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-10-17 10:35:33,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:35:33,023 INFO L93 Difference]: Finished difference Result 137 states and 191 transitions. [2022-10-17 10:35:33,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-17 10:35:33,025 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 16.0) internal successors, (32), 2 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2022-10-17 10:35:33,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:35:33,034 INFO L225 Difference]: With dead ends: 137 [2022-10-17 10:35:33,034 INFO L226 Difference]: Without dead ends: 62 [2022-10-17 10:35:33,038 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-17 10:35:33,041 INFO L413 NwaCegarLoop]: 89 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, 89 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 [2022-10-17 10:35:33,043 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 10:35:33,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-10-17 10:35:33,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2022-10-17 10:35:33,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 47 states have (on average 1.2765957446808511) internal successors, (60), 48 states have internal predecessors, (60), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-10-17 10:35:33,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 80 transitions. [2022-10-17 10:35:33,086 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 80 transitions. Word has length 45 [2022-10-17 10:35:33,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:35:33,087 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 80 transitions. [2022-10-17 10:35:33,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 16.0) internal successors, (32), 2 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-10-17 10:35:33,088 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 80 transitions. [2022-10-17 10:35:33,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-10-17 10:35:33,090 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:35:33,090 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:35:33,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 10:35:33,091 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:35:33,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:35:33,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1695278887, now seen corresponding path program 1 times [2022-10-17 10:35:33,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:35:33,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773167507] [2022-10-17 10:35:33,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:35:33,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:35:33,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:35:33,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:35:33,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:35:33,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-10-17 10:35:33,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:35:33,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-10-17 10:35:33,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:35:33,540 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-10-17 10:35:33,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:35:33,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773167507] [2022-10-17 10:35:33,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773167507] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:35:33,541 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:35:33,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 10:35:33,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991879335] [2022-10-17 10:35:33,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:35:33,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:35:33,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:35:33,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:35:33,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:35:33,551 INFO L87 Difference]: Start difference. First operand 62 states and 80 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-10-17 10:35:33,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:35:33,661 INFO L93 Difference]: Finished difference Result 122 states and 157 transitions. [2022-10-17 10:35:33,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:35:33,662 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2022-10-17 10:35:33,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:35:33,665 INFO L225 Difference]: With dead ends: 122 [2022-10-17 10:35:33,666 INFO L226 Difference]: Without dead ends: 75 [2022-10-17 10:35:33,667 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:35:33,669 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 5 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:35:33,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 125 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:35:33,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-10-17 10:35:33,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2022-10-17 10:35:33,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 59 states have (on average 1.2203389830508475) internal successors, (72), 60 states have internal predecessors, (72), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-10-17 10:35:33,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 92 transitions. [2022-10-17 10:35:33,694 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 92 transitions. Word has length 45 [2022-10-17 10:35:33,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:35:33,695 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 92 transitions. [2022-10-17 10:35:33,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-10-17 10:35:33,696 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 92 transitions. [2022-10-17 10:35:33,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-10-17 10:35:33,699 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:35:33,699 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:35:33,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 10:35:33,700 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:35:33,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:35:33,701 INFO L85 PathProgramCache]: Analyzing trace with hash -910744667, now seen corresponding path program 1 times [2022-10-17 10:35:33,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:35:33,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764870433] [2022-10-17 10:35:33,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:35:33,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:35:33,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:35:34,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:35:34,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:35:34,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-10-17 10:35:34,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:35:34,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-10-17 10:35:34,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:35:34,625 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-10-17 10:35:34,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:35:34,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764870433] [2022-10-17 10:35:34,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764870433] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:35:34,627 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:35:34,628 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-10-17 10:35:34,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562733112] [2022-10-17 10:35:34,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:35:34,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 10:35:34,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:35:34,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 10:35:34,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-10-17 10:35:34,631 INFO L87 Difference]: Start difference. First operand 74 states and 92 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-17 10:35:34,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:35:34,918 INFO L93 Difference]: Finished difference Result 169 states and 208 transitions. [2022-10-17 10:35:34,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-17 10:35:34,919 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 45 [2022-10-17 10:35:34,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:35:34,924 INFO L225 Difference]: With dead ends: 169 [2022-10-17 10:35:34,924 INFO L226 Difference]: Without dead ends: 120 [2022-10-17 10:35:34,930 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2022-10-17 10:35:34,935 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 117 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 10:35:34,936 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 343 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 10:35:34,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-10-17 10:35:34,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 79. [2022-10-17 10:35:34,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 63 states have (on average 1.2063492063492063) internal successors, (76), 64 states have internal predecessors, (76), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-10-17 10:35:34,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 98 transitions. [2022-10-17 10:35:34,964 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 98 transitions. Word has length 45 [2022-10-17 10:35:34,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:35:34,965 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 98 transitions. [2022-10-17 10:35:34,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-17 10:35:34,965 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 98 transitions. [2022-10-17 10:35:34,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-10-17 10:35:34,968 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:35:34,969 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:35:34,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-17 10:35:34,970 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:35:34,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:35:34,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1578784295, now seen corresponding path program 1 times [2022-10-17 10:35:34,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:35:34,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819795482] [2022-10-17 10:35:34,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:35:34,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:35:35,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:35:35,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:35:35,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:35:35,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-10-17 10:35:35,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:35:35,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-10-17 10:35:35,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:35:35,877 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-10-17 10:35:35,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:35:35,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819795482] [2022-10-17 10:35:35,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819795482] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:35:35,884 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:35:35,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-10-17 10:35:35,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796712144] [2022-10-17 10:35:35,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:35:35,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 10:35:35,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:35:35,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 10:35:35,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-10-17 10:35:35,887 INFO L87 Difference]: Start difference. First operand 79 states and 98 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-10-17 10:35:36,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:35:36,012 INFO L93 Difference]: Finished difference Result 85 states and 103 transitions. [2022-10-17 10:35:36,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 10:35:36,012 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2022-10-17 10:35:36,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:35:36,015 INFO L225 Difference]: With dead ends: 85 [2022-10-17 10:35:36,015 INFO L226 Difference]: Without dead ends: 83 [2022-10-17 10:35:36,016 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-10-17 10:35:36,023 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 32 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:35:36,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 294 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:35:36,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-10-17 10:35:36,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2022-10-17 10:35:36,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 66 states have (on average 1.196969696969697) internal successors, (79), 67 states have internal predecessors, (79), 12 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-10-17 10:35:36,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 101 transitions. [2022-10-17 10:35:36,052 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 101 transitions. Word has length 45 [2022-10-17 10:35:36,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:35:36,053 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 101 transitions. [2022-10-17 10:35:36,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-10-17 10:35:36,054 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 101 transitions. [2022-10-17 10:35:36,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-10-17 10:35:36,060 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:35:36,060 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2022-10-17 10:35:36,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-17 10:35:36,061 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:35:36,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:35:36,061 INFO L85 PathProgramCache]: Analyzing trace with hash -116213960, now seen corresponding path program 1 times [2022-10-17 10:35:36,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:35:36,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16314943] [2022-10-17 10:35:36,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:35:36,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:35:36,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:35:36,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:35:36,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:35:37,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-10-17 10:35:37,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:35:37,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-10-17 10:35:37,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:35:37,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-10-17 10:35:37,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:35:37,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-10-17 10:35:37,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:35:37,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-10-17 10:35:37,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:35:37,062 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-10-17 10:35:37,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:35:37,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16314943] [2022-10-17 10:35:37,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16314943] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:35:37,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465937308] [2022-10-17 10:35:37,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:35:37,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:35:37,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e63d4984-df40-4cf6-b7df-5b29db263374/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:35:37,066 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e63d4984-df40-4cf6-b7df-5b29db263374/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:35:37,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e63d4984-df40-4cf6-b7df-5b29db263374/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-17 10:35:37,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:35:37,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 10 conjunts are in the unsatisfiable core [2022-10-17 10:35:37,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:35:37,579 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-10-17 10:35:37,579 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 10:35:37,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465937308] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:35:37,580 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 10:35:37,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 12 [2022-10-17 10:35:37,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840710371] [2022-10-17 10:35:37,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:35:37,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 10:35:37,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:35:37,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 10:35:37,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2022-10-17 10:35:37,583 INFO L87 Difference]: Start difference. First operand 83 states and 101 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-10-17 10:35:37,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:35:37,688 INFO L93 Difference]: Finished difference Result 144 states and 174 transitions. [2022-10-17 10:35:37,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 10:35:37,689 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 62 [2022-10-17 10:35:37,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:35:37,690 INFO L225 Difference]: With dead ends: 144 [2022-10-17 10:35:37,690 INFO L226 Difference]: Without dead ends: 116 [2022-10-17 10:35:37,691 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 72 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-10-17 10:35:37,692 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 84 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 10:35:37,692 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 241 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 15 Unchecked, 0.0s Time] [2022-10-17 10:35:37,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-10-17 10:35:37,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 114. [2022-10-17 10:35:37,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 96 states have (on average 1.21875) internal successors, (117), 97 states have internal predecessors, (117), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-10-17 10:35:37,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 141 transitions. [2022-10-17 10:35:37,709 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 141 transitions. Word has length 62 [2022-10-17 10:35:37,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:35:37,710 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 141 transitions. [2022-10-17 10:35:37,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-10-17 10:35:37,710 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 141 transitions. [2022-10-17 10:35:37,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-10-17 10:35:37,711 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:35:37,712 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2022-10-17 10:35:37,747 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e63d4984-df40-4cf6-b7df-5b29db263374/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-17 10:35:37,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e63d4984-df40-4cf6-b7df-5b29db263374/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:35:37,925 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:35:37,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:35:37,926 INFO L85 PathProgramCache]: Analyzing trace with hash -983473925, now seen corresponding path program 1 times [2022-10-17 10:35:37,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:35:37,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704620165] [2022-10-17 10:35:37,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:35:37,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:35:37,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:35:38,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:35:38,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:35:38,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-10-17 10:35:38,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:35:38,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-10-17 10:35:38,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:35:38,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-10-17 10:35:38,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:35:38,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-10-17 10:35:38,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:35:38,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-10-17 10:35:38,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:35:38,190 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-10-17 10:35:38,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:35:38,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704620165] [2022-10-17 10:35:38,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704620165] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:35:38,191 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:35:38,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 10:35:38,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964375158] [2022-10-17 10:35:38,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:35:38,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:35:38,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:35:38,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:35:38,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:35:38,195 INFO L87 Difference]: Start difference. First operand 114 states and 141 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-10-17 10:35:38,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:35:38,230 INFO L93 Difference]: Finished difference Result 186 states and 227 transitions. [2022-10-17 10:35:38,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:35:38,231 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 63 [2022-10-17 10:35:38,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:35:38,234 INFO L225 Difference]: With dead ends: 186 [2022-10-17 10:35:38,234 INFO L226 Difference]: Without dead ends: 116 [2022-10-17 10:35:38,235 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:35:38,237 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 1 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 10:35:38,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 151 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 10:35:38,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-10-17 10:35:38,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2022-10-17 10:35:38,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 97 states have (on average 1.2164948453608246) internal successors, (118), 98 states have internal predecessors, (118), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-10-17 10:35:38,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 142 transitions. [2022-10-17 10:35:38,263 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 142 transitions. Word has length 63 [2022-10-17 10:35:38,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:35:38,264 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 142 transitions. [2022-10-17 10:35:38,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-10-17 10:35:38,264 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 142 transitions. [2022-10-17 10:35:38,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-10-17 10:35:38,265 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:35:38,265 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:35:38,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-10-17 10:35:38,266 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:35:38,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:35:38,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1785268669, now seen corresponding path program 1 times [2022-10-17 10:35:38,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:35:38,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835437716] [2022-10-17 10:35:38,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:35:38,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:35:38,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:35:39,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:35:39,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:35:39,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-10-17 10:35:39,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:35:39,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-10-17 10:35:39,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:35:39,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-10-17 10:35:39,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:35:39,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-10-17 10:35:39,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:35:39,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-10-17 10:35:39,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:35:39,261 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-10-17 10:35:39,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:35:39,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835437716] [2022-10-17 10:35:39,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835437716] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:35:39,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902788934] [2022-10-17 10:35:39,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:35:39,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:35:39,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e63d4984-df40-4cf6-b7df-5b29db263374/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:35:39,263 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e63d4984-df40-4cf6-b7df-5b29db263374/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:35:39,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e63d4984-df40-4cf6-b7df-5b29db263374/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-17 10:35:39,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:35:39,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 10 conjunts are in the unsatisfiable core [2022-10-17 10:35:39,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:35:39,710 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-10-17 10:35:39,710 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 10:35:39,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902788934] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:35:39,711 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 10:35:39,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 13 [2022-10-17 10:35:39,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33697737] [2022-10-17 10:35:39,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:35:39,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 10:35:39,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:35:39,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 10:35:39,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-10-17 10:35:39,713 INFO L87 Difference]: Start difference. First operand 115 states and 142 transitions. Second operand has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 5 states have internal predecessors, (46), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-10-17 10:35:39,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:35:39,861 INFO L93 Difference]: Finished difference Result 137 states and 163 transitions. [2022-10-17 10:35:39,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 10:35:39,864 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 5 states have internal predecessors, (46), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 66 [2022-10-17 10:35:39,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:35:39,865 INFO L225 Difference]: With dead ends: 137 [2022-10-17 10:35:39,865 INFO L226 Difference]: Without dead ends: 79 [2022-10-17 10:35:39,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 75 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-10-17 10:35:39,866 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 55 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:35:39,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 405 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:35:39,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-10-17 10:35:39,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2022-10-17 10:35:39,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 63 states have (on average 1.1904761904761905) internal successors, (75), 64 states have internal predecessors, (75), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-10-17 10:35:39,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 95 transitions. [2022-10-17 10:35:39,877 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 95 transitions. Word has length 66 [2022-10-17 10:35:39,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:35:39,878 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 95 transitions. [2022-10-17 10:35:39,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 5 states have internal predecessors, (46), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-10-17 10:35:39,878 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 95 transitions. [2022-10-17 10:35:39,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-10-17 10:35:39,879 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:35:39,879 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:35:39,917 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e63d4984-df40-4cf6-b7df-5b29db263374/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-17 10:35:40,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e63d4984-df40-4cf6-b7df-5b29db263374/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:35:40,102 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:35:40,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:35:40,102 INFO L85 PathProgramCache]: Analyzing trace with hash 168968953, now seen corresponding path program 1 times [2022-10-17 10:35:40,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:35:40,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696265734] [2022-10-17 10:35:40,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:35:40,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:35:40,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:35:40,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:35:40,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:35:40,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-10-17 10:35:40,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:35:40,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-10-17 10:35:40,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:35:40,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-10-17 10:35:40,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:35:40,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-10-17 10:35:40,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:35:40,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-10-17 10:35:40,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:35:40,413 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-10-17 10:35:40,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:35:40,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696265734] [2022-10-17 10:35:40,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696265734] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:35:40,413 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:35:40,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 10:35:40,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378319365] [2022-10-17 10:35:40,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:35:40,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 10:35:40,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:35:40,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 10:35:40,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:35:40,417 INFO L87 Difference]: Start difference. First operand 79 states and 95 transitions. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-10-17 10:35:40,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:35:40,554 INFO L93 Difference]: Finished difference Result 131 states and 157 transitions. [2022-10-17 10:35:40,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 10:35:40,555 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 65 [2022-10-17 10:35:40,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:35:40,557 INFO L225 Difference]: With dead ends: 131 [2022-10-17 10:35:40,557 INFO L226 Difference]: Without dead ends: 95 [2022-10-17 10:35:40,557 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:35:40,558 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 12 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:35:40,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 255 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:35:40,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-10-17 10:35:40,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 81. [2022-10-17 10:35:40,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 65 states have (on average 1.1846153846153846) internal successors, (77), 66 states have internal predecessors, (77), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-10-17 10:35:40,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 97 transitions. [2022-10-17 10:35:40,573 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 97 transitions. Word has length 65 [2022-10-17 10:35:40,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:35:40,573 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 97 transitions. [2022-10-17 10:35:40,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-10-17 10:35:40,573 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 97 transitions. [2022-10-17 10:35:40,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-10-17 10:35:40,574 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:35:40,575 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:35:40,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-10-17 10:35:40,575 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:35:40,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:35:40,576 INFO L85 PathProgramCache]: Analyzing trace with hash 231008567, now seen corresponding path program 1 times [2022-10-17 10:35:40,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:35:40,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332076616] [2022-10-17 10:35:40,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:35:40,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:35:40,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:35:41,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:35:41,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:35:41,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-10-17 10:35:41,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:35:41,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-10-17 10:35:41,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:35:41,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-10-17 10:35:41,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:35:41,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-10-17 10:35:41,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:35:41,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-10-17 10:35:41,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:35:41,480 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-10-17 10:35:41,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:35:41,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332076616] [2022-10-17 10:35:41,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332076616] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:35:41,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266186025] [2022-10-17 10:35:41,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:35:41,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:35:41,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e63d4984-df40-4cf6-b7df-5b29db263374/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:35:41,482 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e63d4984-df40-4cf6-b7df-5b29db263374/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:35:41,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e63d4984-df40-4cf6-b7df-5b29db263374/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-17 10:35:42,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:35:42,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 37 conjunts are in the unsatisfiable core [2022-10-17 10:35:42,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:35:42,483 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-10-17 10:35:42,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:35:43,005 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-10-17 10:35:43,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266186025] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:35:43,006 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:35:43,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 14, 11] total 25 [2022-10-17 10:35:43,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043304103] [2022-10-17 10:35:43,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:35:43,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-10-17 10:35:43,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:35:43,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-10-17 10:35:43,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2022-10-17 10:35:43,009 INFO L87 Difference]: Start difference. First operand 81 states and 97 transitions. Second operand has 25 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 22 states have internal predecessors, (70), 8 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 8 states have call predecessors, (13), 8 states have call successors, (13) [2022-10-17 10:35:44,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:35:44,441 INFO L93 Difference]: Finished difference Result 189 states and 226 transitions. [2022-10-17 10:35:44,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-10-17 10:35:44,442 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 22 states have internal predecessors, (70), 8 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 8 states have call predecessors, (13), 8 states have call successors, (13) Word has length 65 [2022-10-17 10:35:44,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:35:44,443 INFO L225 Difference]: With dead ends: 189 [2022-10-17 10:35:44,443 INFO L226 Difference]: Without dead ends: 134 [2022-10-17 10:35:44,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 124 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=279, Invalid=1281, Unknown=0, NotChecked=0, Total=1560 [2022-10-17 10:35:44,444 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 543 mSDsluCounter, 791 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 544 SdHoareTripleChecker+Valid, 877 SdHoareTripleChecker+Invalid, 706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-10-17 10:35:44,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [544 Valid, 877 Invalid, 706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 568 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-10-17 10:35:44,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-10-17 10:35:44,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 88. [2022-10-17 10:35:44,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 71 states have (on average 1.1830985915492958) internal successors, (84), 72 states have internal predecessors, (84), 12 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-10-17 10:35:44,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 106 transitions. [2022-10-17 10:35:44,466 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 106 transitions. Word has length 65 [2022-10-17 10:35:44,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:35:44,467 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 106 transitions. [2022-10-17 10:35:44,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 22 states have internal predecessors, (70), 8 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 8 states have call predecessors, (13), 8 states have call successors, (13) [2022-10-17 10:35:44,467 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 106 transitions. [2022-10-17 10:35:44,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-10-17 10:35:44,468 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:35:44,468 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:35:44,510 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e63d4984-df40-4cf6-b7df-5b29db263374/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-10-17 10:35:44,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e63d4984-df40-4cf6-b7df-5b29db263374/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:35:44,690 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:35:44,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:35:44,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1140798731, now seen corresponding path program 1 times [2022-10-17 10:35:44,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:35:44,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036588499] [2022-10-17 10:35:44,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:35:44,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:35:44,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:35:45,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:35:45,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:35:45,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-10-17 10:35:45,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:35:45,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-10-17 10:35:45,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:35:45,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-10-17 10:35:45,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:35:45,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-10-17 10:35:45,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:35:45,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-10-17 10:35:45,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:35:45,618 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-10-17 10:35:45,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:35:45,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036588499] [2022-10-17 10:35:45,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036588499] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:35:45,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940243609] [2022-10-17 10:35:45,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:35:45,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:35:45,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e63d4984-df40-4cf6-b7df-5b29db263374/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:35:45,620 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e63d4984-df40-4cf6-b7df-5b29db263374/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:35:45,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e63d4984-df40-4cf6-b7df-5b29db263374/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-10-17 10:35:45,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:35:45,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 38 conjunts are in the unsatisfiable core [2022-10-17 10:35:45,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:35:46,435 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-10-17 10:35:46,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:35:46,986 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-10-17 10:35:46,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940243609] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:35:46,986 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:35:46,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 16, 13] total 29 [2022-10-17 10:35:46,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708133563] [2022-10-17 10:35:46,987 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:35:46,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-10-17 10:35:46,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:35:46,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-10-17 10:35:46,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2022-10-17 10:35:46,989 INFO L87 Difference]: Start difference. First operand 88 states and 106 transitions. Second operand has 29 states, 27 states have (on average 2.7777777777777777) internal successors, (75), 26 states have internal predecessors, (75), 8 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 8 states have call predecessors, (13), 8 states have call successors, (13) [2022-10-17 10:35:48,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:35:48,641 INFO L93 Difference]: Finished difference Result 177 states and 213 transitions. [2022-10-17 10:35:48,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-10-17 10:35:48,642 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 2.7777777777777777) internal successors, (75), 26 states have internal predecessors, (75), 8 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 8 states have call predecessors, (13), 8 states have call successors, (13) Word has length 65 [2022-10-17 10:35:48,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:35:48,643 INFO L225 Difference]: With dead ends: 177 [2022-10-17 10:35:48,644 INFO L226 Difference]: Without dead ends: 124 [2022-10-17 10:35:48,645 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 123 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=327, Invalid=1653, Unknown=0, NotChecked=0, Total=1980 [2022-10-17 10:35:48,646 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 427 mSDsluCounter, 850 mSDsCounter, 0 mSdLazyCounter, 673 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 428 SdHoareTripleChecker+Valid, 922 SdHoareTripleChecker+Invalid, 831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-10-17 10:35:48,646 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [428 Valid, 922 Invalid, 831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 673 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-10-17 10:35:48,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-10-17 10:35:48,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 98. [2022-10-17 10:35:48,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 81 states have (on average 1.1604938271604939) internal successors, (94), 82 states have internal predecessors, (94), 12 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-10-17 10:35:48,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 116 transitions. [2022-10-17 10:35:48,664 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 116 transitions. Word has length 65 [2022-10-17 10:35:48,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:35:48,664 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 116 transitions. [2022-10-17 10:35:48,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 2.7777777777777777) internal successors, (75), 26 states have internal predecessors, (75), 8 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 8 states have call predecessors, (13), 8 states have call successors, (13) [2022-10-17 10:35:48,665 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 116 transitions. [2022-10-17 10:35:48,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-10-17 10:35:48,666 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:35:48,666 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:35:48,701 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e63d4984-df40-4cf6-b7df-5b29db263374/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-10-17 10:35:48,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e63d4984-df40-4cf6-b7df-5b29db263374/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-10-17 10:35:48,891 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:35:48,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:35:48,892 INFO L85 PathProgramCache]: Analyzing trace with hash -216148949, now seen corresponding path program 1 times [2022-10-17 10:35:48,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:35:48,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403697623] [2022-10-17 10:35:48,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:35:48,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:35:49,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:35:54,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:35:54,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:35:54,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-10-17 10:35:54,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:35:54,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-10-17 10:35:54,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:35:54,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-10-17 10:35:54,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:35:54,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-10-17 10:35:54,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:35:54,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-10-17 10:35:54,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:35:54,838 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-10-17 10:35:54,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:35:54,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403697623] [2022-10-17 10:35:54,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403697623] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:35:54,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233195111] [2022-10-17 10:35:54,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:35:54,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:35:54,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e63d4984-df40-4cf6-b7df-5b29db263374/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:35:54,842 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e63d4984-df40-4cf6-b7df-5b29db263374/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:35:54,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e63d4984-df40-4cf6-b7df-5b29db263374/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-10-17 10:35:55,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:35:55,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 103 conjunts are in the unsatisfiable core [2022-10-17 10:35:55,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:35:55,281 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-10-17 10:35:55,771 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 41 [2022-10-17 10:35:55,783 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 75 [2022-10-17 10:35:55,815 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 9