./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_back_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c727f3e-673f-429f-bb8d-7441f8a93e75/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c727f3e-673f-429f-bb8d-7441f8a93e75/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c727f3e-673f-429f-bb8d-7441f8a93e75/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c727f3e-673f-429f-bb8d-7441f8a93e75/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_back_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c727f3e-673f-429f-bb8d-7441f8a93e75/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c727f3e-673f-429f-bb8d-7441f8a93e75/bin/uautomizer-tPACEb0tL8 --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 f57bc64edf303a057c8eafb48480d4e5b764bd411481261d53eb2a101eb82ae8 --- 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-e04fb08 [2022-11-16 12:06:58,918 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 12:06:58,921 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 12:06:58,961 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 12:06:58,962 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 12:06:58,964 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 12:06:58,967 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 12:06:58,972 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 12:06:58,974 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 12:06:58,975 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 12:06:58,977 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 12:06:58,980 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 12:06:58,981 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 12:06:58,984 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 12:06:58,986 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 12:06:58,987 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 12:06:58,989 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 12:06:58,996 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 12:06:58,998 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 12:06:59,000 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 12:06:59,004 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 12:06:59,005 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 12:06:59,006 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 12:06:59,011 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 12:06:59,015 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 12:06:59,020 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 12:06:59,020 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 12:06:59,021 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 12:06:59,023 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 12:06:59,024 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 12:06:59,024 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 12:06:59,025 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 12:06:59,027 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 12:06:59,029 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 12:06:59,030 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 12:06:59,030 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 12:06:59,031 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 12:06:59,031 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 12:06:59,031 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 12:06:59,032 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 12:06:59,033 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 12:06:59,033 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c727f3e-673f-429f-bb8d-7441f8a93e75/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-11-16 12:06:59,072 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 12:06:59,072 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 12:06:59,073 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 12:06:59,073 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 12:06:59,074 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 12:06:59,074 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 12:06:59,075 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 12:06:59,075 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 12:06:59,075 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 12:06:59,075 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 12:06:59,076 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 12:06:59,077 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 12:06:59,077 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 12:06:59,077 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 12:06:59,077 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 12:06:59,077 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 12:06:59,078 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 12:06:59,078 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 12:06:59,078 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 12:06:59,078 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 12:06:59,078 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 12:06:59,079 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:06:59,079 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 12:06:59,079 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 12:06:59,079 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 12:06:59,079 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 12:06:59,081 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 12:06:59,081 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 12:06:59,081 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 12:06:59,081 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 12:06:59,082 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_1c727f3e-673f-429f-bb8d-7441f8a93e75/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c727f3e-673f-429f-bb8d-7441f8a93e75/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f57bc64edf303a057c8eafb48480d4e5b764bd411481261d53eb2a101eb82ae8 [2022-11-16 12:06:59,407 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 12:06:59,438 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 12:06:59,441 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 12:06:59,442 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 12:06:59,443 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 12:06:59,444 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c727f3e-673f-429f-bb8d-7441f8a93e75/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/aws-c-common/aws_linked_list_back_harness.i [2022-11-16 12:06:59,512 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c727f3e-673f-429f-bb8d-7441f8a93e75/bin/uautomizer-tPACEb0tL8/data/84f57c369/afbe2c52845846618060c20876cc7c19/FLAG405bd2f6d [2022-11-16 12:07:00,359 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 12:07:00,360 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c727f3e-673f-429f-bb8d-7441f8a93e75/sv-benchmarks/c/aws-c-common/aws_linked_list_back_harness.i [2022-11-16 12:07:00,401 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c727f3e-673f-429f-bb8d-7441f8a93e75/bin/uautomizer-tPACEb0tL8/data/84f57c369/afbe2c52845846618060c20876cc7c19/FLAG405bd2f6d [2022-11-16 12:07:00,884 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c727f3e-673f-429f-bb8d-7441f8a93e75/bin/uautomizer-tPACEb0tL8/data/84f57c369/afbe2c52845846618060c20876cc7c19 [2022-11-16 12:07:00,887 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 12:07:00,892 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 12:07:00,894 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 12:07:00,894 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 12:07:00,898 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 12:07:00,899 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:07:00" (1/1) ... [2022-11-16 12:07:00,900 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@eb07480 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:07:00, skipping insertion in model container [2022-11-16 12:07:00,900 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:07:00" (1/1) ... [2022-11-16 12:07:00,908 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 12:07:01,021 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 12:07:01,317 WARN L229 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_1c727f3e-673f-429f-bb8d-7441f8a93e75/sv-benchmarks/c/aws-c-common/aws_linked_list_back_harness.i[4494,4507] [2022-11-16 12:07:01,325 WARN L229 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_1c727f3e-673f-429f-bb8d-7441f8a93e75/sv-benchmarks/c/aws-c-common/aws_linked_list_back_harness.i[4554,4567] [2022-11-16 12:07:02,111 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 12:07:02,112 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 12:07:02,114 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 12:07:02,116 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 12:07:02,118 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 12:07:02,144 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 12:07:02,145 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 12:07:02,147 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 12:07:02,148 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 12:07:02,150 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 12:07:02,151 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 12:07:02,152 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 12:07:02,152 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 12:07:02,469 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-16 12:07:02,471 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-16 12:07:02,472 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-16 12:07:02,474 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-16 12:07:02,475 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-16 12:07:02,476 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-16 12:07:02,477 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-16 12:07:02,478 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-16 12:07:02,479 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-16 12:07:02,479 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-16 12:07:02,632 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-16 12:07:02,675 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:07:02,700 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 12:07:02,715 WARN L229 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_1c727f3e-673f-429f-bb8d-7441f8a93e75/sv-benchmarks/c/aws-c-common/aws_linked_list_back_harness.i[4494,4507] [2022-11-16 12:07:02,715 WARN L229 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_1c727f3e-673f-429f-bb8d-7441f8a93e75/sv-benchmarks/c/aws-c-common/aws_linked_list_back_harness.i[4554,4567] [2022-11-16 12:07:02,784 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 12:07:02,786 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 12:07:02,786 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 12:07:02,790 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 12:07:02,791 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 12:07:02,808 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 12:07:02,810 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 12:07:02,812 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 12:07:02,813 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 12:07:02,814 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 12:07:02,815 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 12:07:02,816 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 12:07:02,816 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 12:07:02,887 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-16 12:07:02,888 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-16 12:07:02,889 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-16 12:07:02,890 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-16 12:07:02,891 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-16 12:07:02,892 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-16 12:07:02,893 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-16 12:07:02,893 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-16 12:07:02,894 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-16 12:07:02,894 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-16 12:07:02,932 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-16 12:07:02,963 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:07:03,242 INFO L208 MainTranslator]: Completed translation [2022-11-16 12:07:03,243 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:07:03 WrapperNode [2022-11-16 12:07:03,243 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 12:07:03,244 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 12:07:03,245 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 12:07:03,245 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 12:07:03,252 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:07:03" (1/1) ... [2022-11-16 12:07:03,336 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:07:03" (1/1) ... [2022-11-16 12:07:03,442 INFO L138 Inliner]: procedures = 679, calls = 1045, calls flagged for inlining = 50, calls inlined = 5, statements flattened = 134 [2022-11-16 12:07:03,446 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 12:07:03,447 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 12:07:03,448 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 12:07:03,448 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 12:07:03,458 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:07:03" (1/1) ... [2022-11-16 12:07:03,458 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:07:03" (1/1) ... [2022-11-16 12:07:03,467 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:07:03" (1/1) ... [2022-11-16 12:07:03,468 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:07:03" (1/1) ... [2022-11-16 12:07:03,505 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:07:03" (1/1) ... [2022-11-16 12:07:03,509 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:07:03" (1/1) ... [2022-11-16 12:07:03,518 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:07:03" (1/1) ... [2022-11-16 12:07:03,520 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:07:03" (1/1) ... [2022-11-16 12:07:03,543 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 12:07:03,544 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 12:07:03,544 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 12:07:03,544 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 12:07:03,545 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:07:03" (1/1) ... [2022-11-16 12:07:03,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:07:03,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c727f3e-673f-429f-bb8d-7441f8a93e75/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:07:03,585 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c727f3e-673f-429f-bb8d-7441f8a93e75/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 12:07:03,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c727f3e-673f-429f-bb8d-7441f8a93e75/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 12:07:03,634 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_back [2022-11-16 12:07:03,635 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_back [2022-11-16 12:07:03,635 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 12:07:03,635 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-16 12:07:03,635 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-16 12:07:03,636 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2022-11-16 12:07:03,636 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2022-11-16 12:07:03,636 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-16 12:07:03,636 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2022-11-16 12:07:03,636 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2022-11-16 12:07:03,637 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 12:07:03,637 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-16 12:07:03,637 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 12:07:03,637 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 12:07:03,637 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_empty [2022-11-16 12:07:03,638 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_empty [2022-11-16 12:07:03,638 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-16 12:07:03,638 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-16 12:07:03,638 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 12:07:03,638 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-16 12:07:03,639 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-16 12:07:03,639 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2022-11-16 12:07:03,639 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2022-11-16 12:07:03,639 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_prev_is_valid [2022-11-16 12:07:03,639 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_prev_is_valid [2022-11-16 12:07:03,640 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 12:07:03,906 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 12:07:03,909 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 12:07:04,328 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 12:07:04,339 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 12:07:04,343 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-16 12:07:04,345 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:07:04 BoogieIcfgContainer [2022-11-16 12:07:04,346 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 12:07:04,350 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 12:07:04,350 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 12:07:04,354 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 12:07:04,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 12:07:00" (1/3) ... [2022-11-16 12:07:04,355 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c318328 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:07:04, skipping insertion in model container [2022-11-16 12:07:04,355 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:07:03" (2/3) ... [2022-11-16 12:07:04,355 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c318328 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:07:04, skipping insertion in model container [2022-11-16 12:07:04,356 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:07:04" (3/3) ... [2022-11-16 12:07:04,359 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_linked_list_back_harness.i [2022-11-16 12:07:04,384 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 12:07:04,385 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 12:07:04,468 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:07:04,480 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;@1a289393, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:07:04,480 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-16 12:07:04,485 INFO L276 IsEmpty]: Start isEmpty. Operand has 98 states, 64 states have (on average 1.296875) internal successors, (83), 65 states have internal predecessors, (83), 24 states have call successors, (24), 8 states have call predecessors, (24), 8 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-11-16 12:07:04,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-16 12:07:04,501 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:07:04,502 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:07:04,503 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:07:04,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:07:04,513 INFO L85 PathProgramCache]: Analyzing trace with hash 464723229, now seen corresponding path program 1 times [2022-11-16 12:07:04,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:07:04,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671223021] [2022-11-16 12:07:04,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:07:04,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:07:04,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:04,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:07:04,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:04,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:07:04,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:05,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-16 12:07:05,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:05,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:07:05,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:05,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-16 12:07:05,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:05,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-11-16 12:07:05,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:05,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-11-16 12:07:05,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:05,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-11-16 12:07:05,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:05,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:07:05,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:05,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-11-16 12:07:05,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:05,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-11-16 12:07:05,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:05,204 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-11-16 12:07:05,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:07:05,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671223021] [2022-11-16 12:07:05,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671223021] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:07:05,206 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:07:05,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:07:05,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245354476] [2022-11-16 12:07:05,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:07:05,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 12:07:05,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:07:05,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 12:07:05,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 12:07:05,247 INFO L87 Difference]: Start difference. First operand has 98 states, 64 states have (on average 1.296875) internal successors, (83), 65 states have internal predecessors, (83), 24 states have call successors, (24), 8 states have call predecessors, (24), 8 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) 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, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-16 12:07:05,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:07:05,285 INFO L93 Difference]: Finished difference Result 188 states and 271 transitions. [2022-11-16 12:07:05,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 12:07:05,288 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, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 84 [2022-11-16 12:07:05,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:07:05,297 INFO L225 Difference]: With dead ends: 188 [2022-11-16 12:07:05,298 INFO L226 Difference]: Without dead ends: 93 [2022-11-16 12:07:05,302 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 12:07:05,305 INFO L413 NwaCegarLoop]: 127 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, 127 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:07:05,306 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:07:05,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-11-16 12:07:05,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2022-11-16 12:07:05,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 60 states have (on average 1.25) internal successors, (75), 61 states have internal predecessors, (75), 24 states have call successors, (24), 8 states have call predecessors, (24), 8 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-11-16 12:07:05,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 122 transitions. [2022-11-16 12:07:05,356 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 122 transitions. Word has length 84 [2022-11-16 12:07:05,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:07:05,356 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 122 transitions. [2022-11-16 12:07:05,357 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, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-16 12:07:05,357 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 122 transitions. [2022-11-16 12:07:05,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-16 12:07:05,360 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:07:05,360 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:07:05,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 12:07:05,361 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:07:05,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:07:05,362 INFO L85 PathProgramCache]: Analyzing trace with hash 463621205, now seen corresponding path program 1 times [2022-11-16 12:07:05,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:07:05,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376188233] [2022-11-16 12:07:05,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:07:05,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:07:05,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:05,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:07:05,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:05,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:07:05,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:05,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-16 12:07:05,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:05,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:07:05,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:05,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-16 12:07:05,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:05,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-11-16 12:07:05,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:05,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-11-16 12:07:05,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:05,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-11-16 12:07:05,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:05,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:07:05,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:06,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-11-16 12:07:06,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:06,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-11-16 12:07:06,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:06,055 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-11-16 12:07:06,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:07:06,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376188233] [2022-11-16 12:07:06,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376188233] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:07:06,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666706775] [2022-11-16 12:07:06,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:07:06,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:07:06,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c727f3e-673f-429f-bb8d-7441f8a93e75/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:07:06,063 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c727f3e-673f-429f-bb8d-7441f8a93e75/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:07:06,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c727f3e-673f-429f-bb8d-7441f8a93e75/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 12:07:06,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:06,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-16 12:07:06,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:07:06,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-11-16 12:07:06,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-11-16 12:07:06,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:06,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:06,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 29 [2022-11-16 12:07:06,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:06,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:06,691 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 29 [2022-11-16 12:07:08,032 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-11-16 12:07:08,033 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:07:08,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666706775] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:07:08,033 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:07:08,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [6] total 15 [2022-11-16 12:07:08,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874068848] [2022-11-16 12:07:08,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:07:08,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-16 12:07:08,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:07:08,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-16 12:07:08,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2022-11-16 12:07:08,039 INFO L87 Difference]: Start difference. First operand 93 states and 122 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 5 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-16 12:07:08,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:07:08,288 INFO L93 Difference]: Finished difference Result 201 states and 273 transitions. [2022-11-16 12:07:08,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 12:07:08,290 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 5 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 84 [2022-11-16 12:07:08,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:07:08,300 INFO L225 Difference]: With dead ends: 201 [2022-11-16 12:07:08,300 INFO L226 Difference]: Without dead ends: 142 [2022-11-16 12:07:08,304 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 85 SyntacticMatches, 12 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-11-16 12:07:08,308 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 37 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 539 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:07:08,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 539 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 76 Unchecked, 0.1s Time] [2022-11-16 12:07:08,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-11-16 12:07:08,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 131. [2022-11-16 12:07:08,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 85 states have (on average 1.2588235294117647) internal successors, (107), 88 states have internal predecessors, (107), 33 states have call successors, (33), 12 states have call predecessors, (33), 12 states have return successors, (35), 30 states have call predecessors, (35), 32 states have call successors, (35) [2022-11-16 12:07:08,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 175 transitions. [2022-11-16 12:07:08,356 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 175 transitions. Word has length 84 [2022-11-16 12:07:08,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:07:08,360 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 175 transitions. [2022-11-16 12:07:08,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 5 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-16 12:07:08,365 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 175 transitions. [2022-11-16 12:07:08,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-16 12:07:08,373 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:07:08,374 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:07:08,388 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c727f3e-673f-429f-bb8d-7441f8a93e75/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 12:07:08,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c727f3e-673f-429f-bb8d-7441f8a93e75/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:07:08,582 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:07:08,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:07:08,583 INFO L85 PathProgramCache]: Analyzing trace with hash -345725421, now seen corresponding path program 1 times [2022-11-16 12:07:08,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:07:08,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471519963] [2022-11-16 12:07:08,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:07:08,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:07:08,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:08,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:07:08,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:08,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:07:08,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:08,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-16 12:07:08,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:08,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:07:08,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:08,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-16 12:07:08,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:08,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-11-16 12:07:08,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:08,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-11-16 12:07:09,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:09,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-11-16 12:07:09,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:09,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:07:09,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:09,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-11-16 12:07:09,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:09,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-11-16 12:07:09,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:09,136 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-11-16 12:07:09,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:07:09,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471519963] [2022-11-16 12:07:09,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471519963] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:07:09,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962076208] [2022-11-16 12:07:09,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:07:09,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:07:09,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c727f3e-673f-429f-bb8d-7441f8a93e75/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:07:09,141 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c727f3e-673f-429f-bb8d-7441f8a93e75/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:07:09,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c727f3e-673f-429f-bb8d-7441f8a93e75/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 12:07:09,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:09,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-16 12:07:09,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:07:09,375 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 12:07:09,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-16 12:07:09,392 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 12:07:09,393 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-16 12:07:11,640 WARN L855 $PredicateComparison]: unable to prove that (or (exists ((v_aws_linked_list_back_~list.offset_BEFORE_CALL_6 Int) (v_aws_linked_list_back_~list.base_BEFORE_CALL_6 Int)) (not (= (select (select |c_#memory_$Pointer$.base| v_aws_linked_list_back_~list.base_BEFORE_CALL_6) (+ v_aws_linked_list_back_~list.offset_BEFORE_CALL_6 24)) 0))) (exists ((v_aws_linked_list_back_~list.offset_BEFORE_CALL_6 Int) (v_aws_linked_list_back_~list.base_BEFORE_CALL_6 Int)) (not (= (select (select |c_#memory_$Pointer$.offset| v_aws_linked_list_back_~list.base_BEFORE_CALL_6) (+ v_aws_linked_list_back_~list.offset_BEFORE_CALL_6 24)) 0)))) is different from true [2022-11-16 12:07:19,766 WARN L855 $PredicateComparison]: unable to prove that (or (exists ((v_aws_linked_list_back_~list.offset_BEFORE_CALL_7 Int) (v_aws_linked_list_back_~list.base_BEFORE_CALL_7 Int)) (not (= (select (select |c_#memory_$Pointer$.offset| v_aws_linked_list_back_~list.base_BEFORE_CALL_7) (+ v_aws_linked_list_back_~list.offset_BEFORE_CALL_7 24)) 0))) (exists ((v_aws_linked_list_back_~list.offset_BEFORE_CALL_7 Int) (v_aws_linked_list_back_~list.base_BEFORE_CALL_7 Int)) (not (= (select (select |c_#memory_$Pointer$.base| v_aws_linked_list_back_~list.base_BEFORE_CALL_7) (+ v_aws_linked_list_back_~list.offset_BEFORE_CALL_7 24)) 0)))) is different from true [2022-11-16 12:07:21,883 WARN L855 $PredicateComparison]: unable to prove that (or (exists ((v_aws_linked_list_back_~list.offset_BEFORE_CALL_8 Int) (v_aws_linked_list_back_~list.base_BEFORE_CALL_8 Int)) (not (= (select (select |c_#memory_$Pointer$.offset| v_aws_linked_list_back_~list.base_BEFORE_CALL_8) (+ v_aws_linked_list_back_~list.offset_BEFORE_CALL_8 24)) 0))) (exists ((v_aws_linked_list_back_~list.offset_BEFORE_CALL_8 Int) (v_aws_linked_list_back_~list.base_BEFORE_CALL_8 Int)) (not (= (select (select |c_#memory_$Pointer$.base| v_aws_linked_list_back_~list.base_BEFORE_CALL_8) (+ v_aws_linked_list_back_~list.offset_BEFORE_CALL_8 24)) 0)))) is different from true [2022-11-16 12:07:27,993 WARN L855 $PredicateComparison]: unable to prove that (or (exists ((v_aws_linked_list_back_~list.base_BEFORE_CALL_9 Int) (v_aws_linked_list_back_~list.offset_BEFORE_CALL_9 Int)) (not (= (select (select |c_#memory_$Pointer$.base| v_aws_linked_list_back_~list.base_BEFORE_CALL_9) (+ v_aws_linked_list_back_~list.offset_BEFORE_CALL_9 24)) 0))) (exists ((v_aws_linked_list_back_~list.base_BEFORE_CALL_9 Int) (v_aws_linked_list_back_~list.offset_BEFORE_CALL_9 Int)) (not (= (select (select |c_#memory_$Pointer$.offset| v_aws_linked_list_back_~list.base_BEFORE_CALL_9) (+ v_aws_linked_list_back_~list.offset_BEFORE_CALL_9 24)) 0)))) is different from true [2022-11-16 12:07:36,071 WARN L233 SmtUtils]: Spent 6.02s on a formula simplification that was a NOOP. DAG size: 25 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:07:44,262 WARN L233 SmtUtils]: Spent 6.04s on a formula simplification that was a NOOP. DAG size: 36 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:07:52,441 WARN L233 SmtUtils]: Spent 6.04s on a formula simplification that was a NOOP. DAG size: 36 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:07:58,566 WARN L233 SmtUtils]: Spent 6.02s on a formula simplification that was a NOOP. DAG size: 28 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:07:58,607 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 49 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 12 not checked. [2022-11-16 12:07:58,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:08:01,384 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-11-16 12:08:01,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962076208] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:08:01,385 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:08:01,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 16, 11] total 27 [2022-11-16 12:08:01,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532817062] [2022-11-16 12:08:01,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:08:01,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-16 12:08:01,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:08:01,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-16 12:08:01,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=438, Unknown=8, NotChecked=180, Total=702 [2022-11-16 12:08:01,387 INFO L87 Difference]: Start difference. First operand 131 states and 175 transitions. Second operand has 27 states, 26 states have (on average 3.6538461538461537) internal successors, (95), 25 states have internal predecessors, (95), 6 states have call successors, (23), 6 states have call predecessors, (23), 9 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2022-11-16 12:08:32,183 WARN L233 SmtUtils]: Spent 6.02s on a formula simplification that was a NOOP. DAG size: 22 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:08:40,230 WARN L233 SmtUtils]: Spent 6.02s on a formula simplification that was a NOOP. DAG size: 27 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:08:48,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:08:48,885 INFO L93 Difference]: Finished difference Result 298 states and 415 transitions. [2022-11-16 12:08:48,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-16 12:08:48,886 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 3.6538461538461537) internal successors, (95), 25 states have internal predecessors, (95), 6 states have call successors, (23), 6 states have call predecessors, (23), 9 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) Word has length 84 [2022-11-16 12:08:48,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:08:48,889 INFO L225 Difference]: With dead ends: 298 [2022-11-16 12:08:48,890 INFO L226 Difference]: Without dead ends: 179 [2022-11-16 12:08:48,892 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 170 SyntacticMatches, 11 SemanticMatches, 39 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 97.7s TimeCoverageRelationStatistics Valid=202, Invalid=1125, Unknown=21, NotChecked=292, Total=1640 [2022-11-16 12:08:48,893 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 138 mSDsluCounter, 1416 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 1538 SdHoareTripleChecker+Invalid, 1531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 984 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:08:48,894 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 1538 Invalid, 1531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 532 Invalid, 0 Unknown, 984 Unchecked, 0.6s Time] [2022-11-16 12:08:48,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-11-16 12:08:48,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 163. [2022-11-16 12:08:48,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 113 states have (on average 1.2743362831858407) internal successors, (144), 116 states have internal predecessors, (144), 35 states have call successors, (35), 15 states have call predecessors, (35), 14 states have return successors, (43), 31 states have call predecessors, (43), 34 states have call successors, (43) [2022-11-16 12:08:48,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 222 transitions. [2022-11-16 12:08:48,917 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 222 transitions. Word has length 84 [2022-11-16 12:08:48,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:08:48,918 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 222 transitions. [2022-11-16 12:08:48,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 3.6538461538461537) internal successors, (95), 25 states have internal predecessors, (95), 6 states have call successors, (23), 6 states have call predecessors, (23), 9 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2022-11-16 12:08:48,918 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 222 transitions. [2022-11-16 12:08:48,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-16 12:08:48,920 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:08:48,920 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:08:48,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c727f3e-673f-429f-bb8d-7441f8a93e75/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 12:08:49,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c727f3e-673f-429f-bb8d-7441f8a93e75/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:08:49,127 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:08:49,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:08:49,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1647985715, now seen corresponding path program 1 times [2022-11-16 12:08:49,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:08:49,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048152061] [2022-11-16 12:08:49,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:08:49,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:08:49,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:49,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:08:49,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:49,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:08:49,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:49,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-11-16 12:08:49,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:49,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:08:49,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:49,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-11-16 12:08:49,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:49,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-16 12:08:49,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:49,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-11-16 12:08:49,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:49,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-11-16 12:08:49,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:49,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:08:49,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:49,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-11-16 12:08:49,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:49,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-11-16 12:08:49,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:49,516 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-11-16 12:08:49,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:08:49,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048152061] [2022-11-16 12:08:49,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048152061] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:08:49,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571269277] [2022-11-16 12:08:49,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:08:49,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:08:49,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c727f3e-673f-429f-bb8d-7441f8a93e75/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:08:49,521 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c727f3e-673f-429f-bb8d-7441f8a93e75/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:08:49,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c727f3e-673f-429f-bb8d-7441f8a93e75/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 12:08:49,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:49,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 12:08:49,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:08:49,770 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-16 12:08:49,770 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:08:49,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571269277] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:08:49,771 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:08:49,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 7 [2022-11-16 12:08:49,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357272469] [2022-11-16 12:08:49,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:08:49,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:08:49,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:08:49,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:08:49,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:08:49,773 INFO L87 Difference]: Start difference. First operand 163 states and 222 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-16 12:08:49,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:08:49,805 INFO L93 Difference]: Finished difference Result 263 states and 362 transitions. [2022-11-16 12:08:49,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:08:49,806 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 88 [2022-11-16 12:08:49,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:08:49,808 INFO L225 Difference]: With dead ends: 263 [2022-11-16 12:08:49,808 INFO L226 Difference]: Without dead ends: 145 [2022-11-16 12:08:49,809 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:08:49,810 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 3 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:08:49,810 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 354 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:08:49,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-11-16 12:08:49,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 144. [2022-11-16 12:08:49,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 100 states have (on average 1.21) internal successors, (121), 102 states have internal predecessors, (121), 30 states have call successors, (30), 15 states have call predecessors, (30), 13 states have return successors, (32), 26 states have call predecessors, (32), 29 states have call successors, (32) [2022-11-16 12:08:49,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 183 transitions. [2022-11-16 12:08:49,826 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 183 transitions. Word has length 88 [2022-11-16 12:08:49,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:08:49,826 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 183 transitions. [2022-11-16 12:08:49,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-16 12:08:49,827 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 183 transitions. [2022-11-16 12:08:49,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-16 12:08:49,828 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:08:49,828 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:08:49,839 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c727f3e-673f-429f-bb8d-7441f8a93e75/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 12:08:50,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c727f3e-673f-429f-bb8d-7441f8a93e75/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:08:50,034 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:08:50,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:08:50,035 INFO L85 PathProgramCache]: Analyzing trace with hash 718708879, now seen corresponding path program 1 times [2022-11-16 12:08:50,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:08:50,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503964080] [2022-11-16 12:08:50,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:08:50,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:08:50,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:50,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:08:50,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:50,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:08:50,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:50,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-11-16 12:08:50,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:50,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:08:50,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:50,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-11-16 12:08:50,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:50,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-16 12:08:50,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:50,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-11-16 12:08:50,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:50,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-11-16 12:08:50,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:50,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:08:50,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:50,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-11-16 12:08:50,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:50,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-11-16 12:08:50,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:50,471 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-11-16 12:08:50,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:08:50,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503964080] [2022-11-16 12:08:50,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503964080] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:08:50,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82501023] [2022-11-16 12:08:50,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:08:50,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:08:50,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c727f3e-673f-429f-bb8d-7441f8a93e75/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:08:50,473 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c727f3e-673f-429f-bb8d-7441f8a93e75/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:08:50,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c727f3e-673f-429f-bb8d-7441f8a93e75/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 12:08:50,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:50,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 12:08:50,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:08:50,855 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-16 12:08:50,855 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:08:50,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82501023] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:08:50,855 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:08:50,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 15 [2022-11-16 12:08:50,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220041453] [2022-11-16 12:08:50,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:08:50,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 12:08:50,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:08:50,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 12:08:50,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2022-11-16 12:08:50,857 INFO L87 Difference]: Start difference. First operand 144 states and 183 transitions. Second operand has 9 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-11-16 12:08:51,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:08:51,232 INFO L93 Difference]: Finished difference Result 239 states and 310 transitions. [2022-11-16 12:08:51,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:08:51,233 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 88 [2022-11-16 12:08:51,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:08:51,238 INFO L225 Difference]: With dead ends: 239 [2022-11-16 12:08:51,239 INFO L226 Difference]: Without dead ends: 144 [2022-11-16 12:08:51,239 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2022-11-16 12:08:51,242 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 147 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 522 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:08:51,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 522 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 12:08:51,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-11-16 12:08:51,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2022-11-16 12:08:51,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 100 states have (on average 1.2) internal successors, (120), 102 states have internal predecessors, (120), 30 states have call successors, (30), 15 states have call predecessors, (30), 13 states have return successors, (32), 26 states have call predecessors, (32), 29 states have call successors, (32) [2022-11-16 12:08:51,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 182 transitions. [2022-11-16 12:08:51,292 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 182 transitions. Word has length 88 [2022-11-16 12:08:51,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:08:51,292 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 182 transitions. [2022-11-16 12:08:51,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-11-16 12:08:51,293 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 182 transitions. [2022-11-16 12:08:51,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-16 12:08:51,295 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:08:51,296 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:08:51,307 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c727f3e-673f-429f-bb8d-7441f8a93e75/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 12:08:51,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c727f3e-673f-429f-bb8d-7441f8a93e75/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:08:51,502 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:08:51,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:08:51,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1801781246, now seen corresponding path program 1 times [2022-11-16 12:08:51,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:08:51,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635022130] [2022-11-16 12:08:51,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:08:51,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:08:51,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:51,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:08:51,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:51,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:08:51,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:51,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-16 12:08:51,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:51,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:08:51,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:51,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-16 12:08:51,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:51,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-11-16 12:08:51,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:51,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-11-16 12:08:51,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:51,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-11-16 12:08:51,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:51,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:08:51,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:51,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-11-16 12:08:51,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:51,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-11-16 12:08:51,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:51,828 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-11-16 12:08:51,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:08:51,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635022130] [2022-11-16 12:08:51,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635022130] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:08:51,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267231196] [2022-11-16 12:08:51,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:08:51,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:08:51,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c727f3e-673f-429f-bb8d-7441f8a93e75/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:08:51,831 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c727f3e-673f-429f-bb8d-7441f8a93e75/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:08:51,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c727f3e-673f-429f-bb8d-7441f8a93e75/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 12:08:52,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:52,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 12:08:52,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:08:52,219 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-16 12:08:52,219 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:08:52,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267231196] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:08:52,219 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:08:52,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 14 [2022-11-16 12:08:52,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537969792] [2022-11-16 12:08:52,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:08:52,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 12:08:52,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:08:52,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 12:08:52,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2022-11-16 12:08:52,221 INFO L87 Difference]: Start difference. First operand 144 states and 182 transitions. Second operand has 10 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-11-16 12:08:52,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:08:52,664 INFO L93 Difference]: Finished difference Result 248 states and 324 transitions. [2022-11-16 12:08:52,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 12:08:52,665 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 88 [2022-11-16 12:08:52,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:08:52,667 INFO L225 Difference]: With dead ends: 248 [2022-11-16 12:08:52,667 INFO L226 Difference]: Without dead ends: 152 [2022-11-16 12:08:52,668 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2022-11-16 12:08:52,669 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 188 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 577 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:08:52,669 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 577 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 12:08:52,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-11-16 12:08:52,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 145. [2022-11-16 12:08:52,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 101 states have (on average 1.198019801980198) internal successors, (121), 103 states have internal predecessors, (121), 30 states have call successors, (30), 15 states have call predecessors, (30), 13 states have return successors, (32), 26 states have call predecessors, (32), 29 states have call successors, (32) [2022-11-16 12:08:52,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 183 transitions. [2022-11-16 12:08:52,685 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 183 transitions. Word has length 88 [2022-11-16 12:08:52,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:08:52,686 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 183 transitions. [2022-11-16 12:08:52,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-11-16 12:08:52,686 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 183 transitions. [2022-11-16 12:08:52,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-11-16 12:08:52,688 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:08:52,688 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:08:52,699 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c727f3e-673f-429f-bb8d-7441f8a93e75/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 12:08:52,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c727f3e-673f-429f-bb8d-7441f8a93e75/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:08:52,894 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:08:52,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:08:52,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1442434984, now seen corresponding path program 1 times [2022-11-16 12:08:52,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:08:52,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469824319] [2022-11-16 12:08:52,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:08:52,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:08:52,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:53,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:08:53,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:53,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:08:53,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:53,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-16 12:08:53,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:53,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:08:53,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:53,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-16 12:08:53,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:53,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-11-16 12:08:53,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:53,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-16 12:08:53,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:53,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-11-16 12:08:53,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:53,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:08:53,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:53,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-11-16 12:08:53,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:53,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-11-16 12:08:53,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:53,328 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-11-16 12:08:53,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:08:53,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469824319] [2022-11-16 12:08:53,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469824319] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:08:53,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833147469] [2022-11-16 12:08:53,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:08:53,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:08:53,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c727f3e-673f-429f-bb8d-7441f8a93e75/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:08:53,330 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c727f3e-673f-429f-bb8d-7441f8a93e75/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:08:53,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c727f3e-673f-429f-bb8d-7441f8a93e75/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 12:08:53,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:53,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 12:08:53,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:08:53,544 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-16 12:08:53,544 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:08:53,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833147469] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:08:53,544 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:08:53,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-16 12:08:53,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908398349] [2022-11-16 12:08:53,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:08:53,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:08:53,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:08:53,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:08:53,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:08:53,547 INFO L87 Difference]: Start difference. First operand 145 states and 183 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-16 12:08:53,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:08:53,574 INFO L93 Difference]: Finished difference Result 244 states and 320 transitions. [2022-11-16 12:08:53,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:08:53,575 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 89 [2022-11-16 12:08:53,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:08:53,576 INFO L225 Difference]: With dead ends: 244 [2022-11-16 12:08:53,576 INFO L226 Difference]: Without dead ends: 151 [2022-11-16 12:08:53,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:08:53,578 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 4 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:08:53,579 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 236 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:08:53,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-11-16 12:08:53,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 146. [2022-11-16 12:08:53,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 102 states have (on average 1.196078431372549) internal successors, (122), 104 states have internal predecessors, (122), 30 states have call successors, (30), 15 states have call predecessors, (30), 13 states have return successors, (32), 26 states have call predecessors, (32), 29 states have call successors, (32) [2022-11-16 12:08:53,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 184 transitions. [2022-11-16 12:08:53,602 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 184 transitions. Word has length 89 [2022-11-16 12:08:53,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:08:53,603 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 184 transitions. [2022-11-16 12:08:53,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-16 12:08:53,603 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 184 transitions. [2022-11-16 12:08:53,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-11-16 12:08:53,605 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:08:53,605 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:08:53,612 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c727f3e-673f-429f-bb8d-7441f8a93e75/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 12:08:53,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c727f3e-673f-429f-bb8d-7441f8a93e75/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-16 12:08:53,812 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:08:53,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:08:53,813 INFO L85 PathProgramCache]: Analyzing trace with hash 1174325196, now seen corresponding path program 1 times [2022-11-16 12:08:53,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:08:53,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641997072] [2022-11-16 12:08:53,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:08:53,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:08:53,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:54,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:08:54,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:54,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:08:54,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:54,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-11-16 12:08:54,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:54,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:08:54,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:54,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-11-16 12:08:54,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:54,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-16 12:08:54,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:54,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 12:08:54,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:54,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-11-16 12:08:54,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:54,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-11-16 12:08:54,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:54,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:08:54,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:54,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-11-16 12:08:54,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:54,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-11-16 12:08:54,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:54,345 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-16 12:08:54,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:08:54,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641997072] [2022-11-16 12:08:54,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641997072] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:08:54,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780236270] [2022-11-16 12:08:54,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:08:54,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:08:54,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c727f3e-673f-429f-bb8d-7441f8a93e75/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:08:54,347 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c727f3e-673f-429f-bb8d-7441f8a93e75/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:08:54,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c727f3e-673f-429f-bb8d-7441f8a93e75/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 12:08:54,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:54,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-16 12:08:54,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:08:54,632 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 12:08:54,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-16 12:08:54,652 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 12:08:54,652 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-16 12:08:55,578 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 50 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-16 12:08:55,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:08:56,236 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-11-16 12:08:56,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780236270] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:08:56,237 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:08:56,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 9] total 21 [2022-11-16 12:08:56,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712402407] [2022-11-16 12:08:56,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:08:56,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-16 12:08:56,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:08:56,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-16 12:08:56,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-11-16 12:08:56,241 INFO L87 Difference]: Start difference. First operand 146 states and 184 transitions. Second operand has 21 states, 20 states have (on average 5.75) internal successors, (115), 20 states have internal predecessors, (115), 7 states have call successors, (26), 3 states have call predecessors, (26), 7 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) [2022-11-16 12:08:57,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:08:57,198 INFO L93 Difference]: Finished difference Result 257 states and 328 transitions. [2022-11-16 12:08:57,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-16 12:08:57,199 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 5.75) internal successors, (115), 20 states have internal predecessors, (115), 7 states have call successors, (26), 3 states have call predecessors, (26), 7 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) Word has length 99 [2022-11-16 12:08:57,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:08:57,200 INFO L225 Difference]: With dead ends: 257 [2022-11-16 12:08:57,200 INFO L226 Difference]: Without dead ends: 163 [2022-11-16 12:08:57,201 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 201 SyntacticMatches, 10 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=165, Invalid=957, Unknown=0, NotChecked=0, Total=1122 [2022-11-16 12:08:57,202 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 89 mSDsluCounter, 1311 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 1422 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:08:57,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 1422 Invalid, 683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 620 Invalid, 0 Unknown, 57 Unchecked, 0.6s Time] [2022-11-16 12:08:57,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-11-16 12:08:57,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 157. [2022-11-16 12:08:57,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 110 states have (on average 1.2) internal successors, (132), 113 states have internal predecessors, (132), 30 states have call successors, (30), 16 states have call predecessors, (30), 16 states have return successors, (33), 27 states have call predecessors, (33), 29 states have call successors, (33) [2022-11-16 12:08:57,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 195 transitions. [2022-11-16 12:08:57,217 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 195 transitions. Word has length 99 [2022-11-16 12:08:57,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:08:57,217 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 195 transitions. [2022-11-16 12:08:57,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 5.75) internal successors, (115), 20 states have internal predecessors, (115), 7 states have call successors, (26), 3 states have call predecessors, (26), 7 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) [2022-11-16 12:08:57,218 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 195 transitions. [2022-11-16 12:08:57,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-11-16 12:08:57,219 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:08:57,219 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:08:57,231 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c727f3e-673f-429f-bb8d-7441f8a93e75/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-16 12:08:57,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c727f3e-673f-429f-bb8d-7441f8a93e75/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-16 12:08:57,426 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:08:57,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:08:57,426 INFO L85 PathProgramCache]: Analyzing trace with hash -1176254157, now seen corresponding path program 1 times [2022-11-16 12:08:57,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:08:57,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200542463] [2022-11-16 12:08:57,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:08:57,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:08:57,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:57,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:08:57,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:57,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:08:57,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:57,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-16 12:08:57,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:57,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:08:57,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:57,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-16 12:08:57,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:57,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-11-16 12:08:57,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:58,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 12:08:58,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:58,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-11-16 12:08:58,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:58,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-11-16 12:08:58,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:58,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:08:58,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:58,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-11-16 12:08:58,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:58,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-11-16 12:08:58,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:58,105 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-11-16 12:08:58,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:08:58,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200542463] [2022-11-16 12:08:58,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200542463] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:08:58,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468033628] [2022-11-16 12:08:58,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:08:58,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:08:58,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c727f3e-673f-429f-bb8d-7441f8a93e75/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:08:58,107 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c727f3e-673f-429f-bb8d-7441f8a93e75/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:08:58,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c727f3e-673f-429f-bb8d-7441f8a93e75/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 12:08:58,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:58,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-16 12:08:58,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:08:58,371 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 12:08:58,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-16 12:08:58,386 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 12:08:58,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-16 12:08:59,530 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 47 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-16 12:08:59,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:09:00,180 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-11-16 12:09:00,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468033628] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:09:00,181 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:09:00,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 13, 11] total 26 [2022-11-16 12:09:00,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173100459] [2022-11-16 12:09:00,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:09:00,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-16 12:09:00,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:09:00,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-16 12:09:00,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2022-11-16 12:09:00,186 INFO L87 Difference]: Start difference. First operand 157 states and 195 transitions. Second operand has 26 states, 26 states have (on average 4.461538461538462) internal successors, (116), 26 states have internal predecessors, (116), 7 states have call successors, (26), 3 states have call predecessors, (26), 6 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) [2022-11-16 12:09:01,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:09:01,895 INFO L93 Difference]: Finished difference Result 299 states and 383 transitions. [2022-11-16 12:09:01,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-16 12:09:01,897 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.461538461538462) internal successors, (116), 26 states have internal predecessors, (116), 7 states have call successors, (26), 3 states have call predecessors, (26), 6 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) Word has length 99 [2022-11-16 12:09:01,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:09:01,899 INFO L225 Difference]: With dead ends: 299 [2022-11-16 12:09:01,899 INFO L226 Difference]: Without dead ends: 194 [2022-11-16 12:09:01,902 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 203 SyntacticMatches, 13 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=381, Invalid=1599, Unknown=0, NotChecked=0, Total=1980 [2022-11-16 12:09:01,905 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 264 mSDsluCounter, 1368 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 1481 SdHoareTripleChecker+Invalid, 741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:09:01,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [278 Valid, 1481 Invalid, 741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 634 Invalid, 0 Unknown, 85 Unchecked, 0.6s Time] [2022-11-16 12:09:01,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-11-16 12:09:01,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 173. [2022-11-16 12:09:01,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 125 states have (on average 1.208) internal successors, (151), 128 states have internal predecessors, (151), 31 states have call successors, (31), 16 states have call predecessors, (31), 16 states have return successors, (34), 28 states have call predecessors, (34), 30 states have call successors, (34) [2022-11-16 12:09:01,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 216 transitions. [2022-11-16 12:09:01,929 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 216 transitions. Word has length 99 [2022-11-16 12:09:01,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:09:01,929 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 216 transitions. [2022-11-16 12:09:01,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.461538461538462) internal successors, (116), 26 states have internal predecessors, (116), 7 states have call successors, (26), 3 states have call predecessors, (26), 6 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) [2022-11-16 12:09:01,930 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 216 transitions. [2022-11-16 12:09:01,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-16 12:09:01,931 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:09:01,932 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:09:01,942 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c727f3e-673f-429f-bb8d-7441f8a93e75/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-16 12:09:02,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c727f3e-673f-429f-bb8d-7441f8a93e75/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:09:02,142 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:09:02,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:09:02,143 INFO L85 PathProgramCache]: Analyzing trace with hash 158730997, now seen corresponding path program 1 times [2022-11-16 12:09:02,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:09:02,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550349715] [2022-11-16 12:09:02,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:09:02,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:09:02,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:02,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:09:02,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:02,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:09:02,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:02,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-11-16 12:09:02,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:02,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:09:02,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:02,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-11-16 12:09:02,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:02,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-16 12:09:02,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:02,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 12:09:02,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:02,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-11-16 12:09:02,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:02,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-11-16 12:09:02,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:02,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:09:02,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:02,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-11-16 12:09:02,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:02,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-11-16 12:09:02,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:02,377 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-11-16 12:09:02,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:09:02,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550349715] [2022-11-16 12:09:02,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550349715] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:09:02,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316294735] [2022-11-16 12:09:02,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:09:02,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:09:02,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c727f3e-673f-429f-bb8d-7441f8a93e75/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:09:02,383 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c727f3e-673f-429f-bb8d-7441f8a93e75/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:09:02,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c727f3e-673f-429f-bb8d-7441f8a93e75/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 12:09:02,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:02,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 12:09:02,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:09:02,637 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-16 12:09:02,637 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:09:02,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316294735] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:09:02,638 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:09:02,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2022-11-16 12:09:02,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587146193] [2022-11-16 12:09:02,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:09:02,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:09:02,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:09:02,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:09:02,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:09:02,640 INFO L87 Difference]: Start difference. First operand 173 states and 216 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-16 12:09:02,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:09:02,673 INFO L93 Difference]: Finished difference Result 289 states and 371 transitions. [2022-11-16 12:09:02,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:09:02,674 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 101 [2022-11-16 12:09:02,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:09:02,675 INFO L225 Difference]: With dead ends: 289 [2022-11-16 12:09:02,675 INFO L226 Difference]: Without dead ends: 166 [2022-11-16 12:09:02,676 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:09:02,677 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 6 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:09:02,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 356 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:09:02,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-11-16 12:09:02,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 162. [2022-11-16 12:09:02,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 114 states have (on average 1.1842105263157894) internal successors, (135), 117 states have internal predecessors, (135), 31 states have call successors, (31), 16 states have call predecessors, (31), 16 states have return successors, (34), 28 states have call predecessors, (34), 30 states have call successors, (34) [2022-11-16 12:09:02,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 200 transitions. [2022-11-16 12:09:02,701 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 200 transitions. Word has length 101 [2022-11-16 12:09:02,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:09:02,701 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 200 transitions. [2022-11-16 12:09:02,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-16 12:09:02,702 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 200 transitions. [2022-11-16 12:09:02,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-16 12:09:02,704 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:09:02,704 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:09:02,710 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c727f3e-673f-429f-bb8d-7441f8a93e75/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-16 12:09:02,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c727f3e-673f-429f-bb8d-7441f8a93e75/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-16 12:09:02,910 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:09:02,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:09:02,911 INFO L85 PathProgramCache]: Analyzing trace with hash -370312569, now seen corresponding path program 1 times [2022-11-16 12:09:02,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:09:02,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465358199] [2022-11-16 12:09:02,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:09:02,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:09:02,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:03,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:09:03,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:03,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:09:03,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:03,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-11-16 12:09:03,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:03,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:09:03,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:03,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-11-16 12:09:03,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:03,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-16 12:09:03,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:03,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 12:09:03,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:03,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-11-16 12:09:03,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:03,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-11-16 12:09:03,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:03,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:09:03,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:03,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-11-16 12:09:03,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:03,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-11-16 12:09:03,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:03,988 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-11-16 12:09:03,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:09:03,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465358199] [2022-11-16 12:09:03,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465358199] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:09:03,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283395230] [2022-11-16 12:09:03,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:09:03,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:09:03,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c727f3e-673f-429f-bb8d-7441f8a93e75/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:09:03,990 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c727f3e-673f-429f-bb8d-7441f8a93e75/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:09:04,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c727f3e-673f-429f-bb8d-7441f8a93e75/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-16 12:09:04,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:04,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 71 conjunts are in the unsatisfiable core [2022-11-16 12:09:04,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:09:04,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 12:09:04,503 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-16 12:09:04,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-16 12:09:04,509 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-11-16 12:09:04,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 12:09:04,595 INFO L321 Elim1Store]: treesize reduction 38, result has 22.4 percent of original size [2022-11-16 12:09:04,596 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 65 treesize of output 93 [2022-11-16 12:09:04,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:09:04,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 67 [2022-11-16 12:09:04,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2022-11-16 12:09:04,729 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_DerPreprocessor_1 (Array Int Int)) (v_DerPreprocessor_2 (Array Int Int)) (|v_ULTIMATE.start_aws_linked_list_back_harness_~#list~0#1.base_BEFORE_CALL_27| Int)) (let ((.cse0 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_back_harness_~#list~0#1.base_BEFORE_CALL_27|))) (let ((.cse1 (select .cse0 0))) (and (= (select .cse0 24) (select v_DerPreprocessor_2 24)) (not (= |v_ULTIMATE.start_aws_linked_list_back_harness_~#list~0#1.base_BEFORE_CALL_27| .cse1)) (= (select |c_#memory_$Pointer$.base| .cse1) (select (store (store (store (store |c_#memory_$Pointer$.base| .cse1 v_DerPreprocessor_1) |v_ULTIMATE.start_aws_linked_list_back_harness_~#list~0#1.base_BEFORE_CALL_27| v_DerPreprocessor_2) .cse1 v_DerPreprocessor_1) |v_ULTIMATE.start_aws_linked_list_back_harness_~#list~0#1.base_BEFORE_CALL_27| v_DerPreprocessor_2) .cse1)))))) is different from true [2022-11-16 12:09:04,930 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_DerPreprocessor_1 (Array Int Int)) (v_DerPreprocessor_2 (Array Int Int)) (|v_ULTIMATE.start_aws_linked_list_back_harness_~#list~0#1.base_BEFORE_CALL_28| Int)) (let ((.cse1 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_back_harness_~#list~0#1.base_BEFORE_CALL_28|))) (let ((.cse0 (select .cse1 0))) (and (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse0 v_DerPreprocessor_1) |v_ULTIMATE.start_aws_linked_list_back_harness_~#list~0#1.base_BEFORE_CALL_28| v_DerPreprocessor_2) .cse0 v_DerPreprocessor_1) |v_ULTIMATE.start_aws_linked_list_back_harness_~#list~0#1.base_BEFORE_CALL_28| v_DerPreprocessor_2) .cse0) (select |c_#memory_$Pointer$.base| .cse0)) (not (= .cse0 |v_ULTIMATE.start_aws_linked_list_back_harness_~#list~0#1.base_BEFORE_CALL_28|)) (= (select .cse1 24) (select v_DerPreprocessor_2 24)))))) (exists ((v_DerPreprocessor_3 (Array Int Int)) (|v_ULTIMATE.start_aws_linked_list_back_harness_~#list~0#1.base_BEFORE_CALL_27| Int) (v_DerPreprocessor_4 (Array Int Int))) (let ((.cse2 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_back_harness_~#list~0#1.base_BEFORE_CALL_27|))) (let ((.cse3 (select .cse2 0))) (and (= (select v_DerPreprocessor_4 24) (select .cse2 24)) (= (select |c_#memory_$Pointer$.base| .cse3) (select (store (store (store (store |c_#memory_$Pointer$.base| .cse3 v_DerPreprocessor_3) |v_ULTIMATE.start_aws_linked_list_back_harness_~#list~0#1.base_BEFORE_CALL_27| v_DerPreprocessor_4) .cse3 v_DerPreprocessor_3) |v_ULTIMATE.start_aws_linked_list_back_harness_~#list~0#1.base_BEFORE_CALL_27| v_DerPreprocessor_4) .cse3)) (not (= |v_ULTIMATE.start_aws_linked_list_back_harness_~#list~0#1.base_BEFORE_CALL_27| .cse3))))))) is different from true [2022-11-16 12:09:05,636 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_DerPreprocessor_1 (Array Int Int)) (v_DerPreprocessor_2 (Array Int Int)) (|v_ULTIMATE.start_aws_linked_list_back_harness_~#list~0#1.base_BEFORE_CALL_28| Int)) (let ((.cse1 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_back_harness_~#list~0#1.base_BEFORE_CALL_28|))) (let ((.cse0 (select .cse1 0))) (and (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse0 v_DerPreprocessor_1) |v_ULTIMATE.start_aws_linked_list_back_harness_~#list~0#1.base_BEFORE_CALL_28| v_DerPreprocessor_2) .cse0 v_DerPreprocessor_1) |v_ULTIMATE.start_aws_linked_list_back_harness_~#list~0#1.base_BEFORE_CALL_28| v_DerPreprocessor_2) .cse0) (select |c_#memory_$Pointer$.base| .cse0)) (not (= .cse0 |v_ULTIMATE.start_aws_linked_list_back_harness_~#list~0#1.base_BEFORE_CALL_28|)) (= (select .cse1 24) (select v_DerPreprocessor_2 24)))))) (exists ((v_aws_linked_list_back_~list.base_BEFORE_CALL_35 Int) (v_DerPreprocessor_5 (Array Int Int)) (v_DerPreprocessor_6 (Array Int Int))) (let ((.cse3 (select |c_#memory_$Pointer$.base| v_aws_linked_list_back_~list.base_BEFORE_CALL_35))) (let ((.cse2 (select .cse3 0))) (and (= (select |c_#memory_$Pointer$.base| .cse2) (select (store (store (store (store |c_#memory_$Pointer$.base| .cse2 v_DerPreprocessor_5) v_aws_linked_list_back_~list.base_BEFORE_CALL_35 v_DerPreprocessor_6) .cse2 v_DerPreprocessor_5) v_aws_linked_list_back_~list.base_BEFORE_CALL_35 v_DerPreprocessor_6) .cse2)) (not (= .cse2 v_aws_linked_list_back_~list.base_BEFORE_CALL_35)) (= (select .cse3 24) (select v_DerPreprocessor_6 24)))))) (exists ((|v_ULTIMATE.start_aws_linked_list_back_harness_~#list~0#1.base_BEFORE_CALL_27| Int) (v_DerPreprocessor_7 (Array Int Int)) (v_DerPreprocessor_8 (Array Int Int))) (let ((.cse4 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_back_harness_~#list~0#1.base_BEFORE_CALL_27|))) (let ((.cse5 (select .cse4 0))) (and (= (select .cse4 24) (select v_DerPreprocessor_8 24)) (not (= |v_ULTIMATE.start_aws_linked_list_back_harness_~#list~0#1.base_BEFORE_CALL_27| .cse5)) (= (select |c_#memory_$Pointer$.base| .cse5) (select (store (store (store (store |c_#memory_$Pointer$.base| .cse5 v_DerPreprocessor_7) |v_ULTIMATE.start_aws_linked_list_back_harness_~#list~0#1.base_BEFORE_CALL_27| v_DerPreprocessor_8) .cse5 v_DerPreprocessor_7) |v_ULTIMATE.start_aws_linked_list_back_harness_~#list~0#1.base_BEFORE_CALL_27| v_DerPreprocessor_8) .cse5)))))) (exists ((v_DerPreprocessor_3 (Array Int Int)) (v_DerPreprocessor_4 (Array Int Int)) (|v_ULTIMATE.start_aws_linked_list_back_harness_~#list~0#1.base_BEFORE_CALL_30| Int)) (let ((.cse7 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_back_harness_~#list~0#1.base_BEFORE_CALL_30|))) (let ((.cse6 (select .cse7 0))) (and (= (select |c_#memory_$Pointer$.base| .cse6) (select (store (store (store (store |c_#memory_$Pointer$.base| .cse6 v_DerPreprocessor_3) |v_ULTIMATE.start_aws_linked_list_back_harness_~#list~0#1.base_BEFORE_CALL_30| v_DerPreprocessor_4) .cse6 v_DerPreprocessor_3) |v_ULTIMATE.start_aws_linked_list_back_harness_~#list~0#1.base_BEFORE_CALL_30| v_DerPreprocessor_4) .cse6)) (not (= .cse6 |v_ULTIMATE.start_aws_linked_list_back_harness_~#list~0#1.base_BEFORE_CALL_30|)) (= (select v_DerPreprocessor_4 24) (select .cse7 24))))))) is different from true [2022-11-16 12:09:07,685 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 52 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 12 not checked. [2022-11-16 12:09:07,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:09:08,365 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1011 Int) (v_ArrVal_1012 (Array Int Int)) (v_ArrVal_1010 (Array Int Int))) (not (= |c_ULTIMATE.start_aws_linked_list_back_harness_~#list~0#1.base| (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_1012) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_1010) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24) v_ArrVal_1011)) |c_ULTIMATE.start_aws_linked_list_back_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_back_harness_~#list~0#1.offset|)))) is different from false [2022-11-16 12:09:08,402 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:09:08,403 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 33 [2022-11-16 12:09:08,420 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:09:08,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 147 treesize of output 151 [2022-11-16 12:09:08,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 140 [2022-11-16 12:09:08,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 140 treesize of output 138 [2022-11-16 12:09:08,525 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-16 12:09:08,538 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2022-11-16 12:09:08,571 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:09:08,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 58 [2022-11-16 12:09:09,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283395230] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:09:09,023 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:09:09,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 20] total 32 [2022-11-16 12:09:09,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125442514] [2022-11-16 12:09:09,024 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:09:09,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-16 12:09:09,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:09:09,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-16 12:09:09,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1353, Unknown=20, NotChecked=308, Total=1806 [2022-11-16 12:09:09,026 INFO L87 Difference]: Start difference. First operand 162 states and 200 transitions. Second operand has 32 states, 29 states have (on average 4.241379310344827) internal successors, (123), 29 states have internal predecessors, (123), 13 states have call successors, (26), 8 states have call predecessors, (26), 9 states have return successors, (23), 10 states have call predecessors, (23), 12 states have call successors, (23) [2022-11-16 12:09:10,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:09:10,524 INFO L93 Difference]: Finished difference Result 452 states and 599 transitions. [2022-11-16 12:09:10,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-16 12:09:10,524 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 29 states have (on average 4.241379310344827) internal successors, (123), 29 states have internal predecessors, (123), 13 states have call successors, (26), 8 states have call predecessors, (26), 9 states have return successors, (23), 10 states have call predecessors, (23), 12 states have call successors, (23) Word has length 102 [2022-11-16 12:09:10,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:09:10,527 INFO L225 Difference]: With dead ends: 452 [2022-11-16 12:09:10,527 INFO L226 Difference]: Without dead ends: 328 [2022-11-16 12:09:10,528 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 185 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=183, Invalid=2158, Unknown=27, NotChecked=388, Total=2756 [2022-11-16 12:09:10,529 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 63 mSDsluCounter, 2896 mSDsCounter, 0 mSdLazyCounter, 651 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 3092 SdHoareTripleChecker+Invalid, 2385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1716 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:09:10,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 3092 Invalid, 2385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 651 Invalid, 0 Unknown, 1716 Unchecked, 0.6s Time] [2022-11-16 12:09:10,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2022-11-16 12:09:10,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 277. [2022-11-16 12:09:10,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 196 states have (on average 1.1683673469387754) internal successors, (229), 202 states have internal predecessors, (229), 55 states have call successors, (55), 23 states have call predecessors, (55), 25 states have return successors, (75), 51 states have call predecessors, (75), 54 states have call successors, (75) [2022-11-16 12:09:10,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 359 transitions. [2022-11-16 12:09:10,589 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 359 transitions. Word has length 102 [2022-11-16 12:09:10,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:09:10,590 INFO L495 AbstractCegarLoop]: Abstraction has 277 states and 359 transitions. [2022-11-16 12:09:10,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 29 states have (on average 4.241379310344827) internal successors, (123), 29 states have internal predecessors, (123), 13 states have call successors, (26), 8 states have call predecessors, (26), 9 states have return successors, (23), 10 states have call predecessors, (23), 12 states have call successors, (23) [2022-11-16 12:09:10,590 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 359 transitions. [2022-11-16 12:09:10,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-11-16 12:09:10,592 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:09:10,592 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:09:10,611 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c727f3e-673f-429f-bb8d-7441f8a93e75/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-16 12:09:10,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c727f3e-673f-429f-bb8d-7441f8a93e75/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:09:10,798 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:09:10,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:09:10,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1232893959, now seen corresponding path program 1 times [2022-11-16 12:09:10,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:09:10,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477971394] [2022-11-16 12:09:10,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:09:10,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:09:10,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:10,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:09:10,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:10,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:09:10,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:10,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-16 12:09:10,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:10,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:09:10,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:10,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-16 12:09:10,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:10,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-11-16 12:09:10,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:10,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 12:09:10,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:10,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-11-16 12:09:10,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:10,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-11-16 12:09:10,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:10,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:09:10,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:10,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-11-16 12:09:10,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:10,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-11-16 12:09:11,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:11,008 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-11-16 12:09:11,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:09:11,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477971394] [2022-11-16 12:09:11,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477971394] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:09:11,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64645220] [2022-11-16 12:09:11,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:09:11,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:09:11,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c727f3e-673f-429f-bb8d-7441f8a93e75/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:09:11,011 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c727f3e-673f-429f-bb8d-7441f8a93e75/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:09:11,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c727f3e-673f-429f-bb8d-7441f8a93e75/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-16 12:09:11,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:11,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 12:09:11,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:09:11,262 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-16 12:09:11,262 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:09:11,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64645220] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:09:11,262 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:09:11,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2022-11-16 12:09:11,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915810194] [2022-11-16 12:09:11,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:09:11,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:09:11,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:09:11,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:09:11,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:09:11,264 INFO L87 Difference]: Start difference. First operand 277 states and 359 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-16 12:09:11,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:09:11,313 INFO L93 Difference]: Finished difference Result 459 states and 613 transitions. [2022-11-16 12:09:11,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:09:11,314 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 100 [2022-11-16 12:09:11,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:09:11,317 INFO L225 Difference]: With dead ends: 459 [2022-11-16 12:09:11,317 INFO L226 Difference]: Without dead ends: 267 [2022-11-16 12:09:11,318 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:09:11,319 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 10 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:09:11,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 357 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:09:11,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-11-16 12:09:11,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 259. [2022-11-16 12:09:11,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 179 states have (on average 1.1396648044692737) internal successors, (204), 185 states have internal predecessors, (204), 54 states have call successors, (54), 23 states have call predecessors, (54), 25 states have return successors, (74), 50 states have call predecessors, (74), 53 states have call successors, (74) [2022-11-16 12:09:11,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 332 transitions. [2022-11-16 12:09:11,354 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 332 transitions. Word has length 100 [2022-11-16 12:09:11,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:09:11,355 INFO L495 AbstractCegarLoop]: Abstraction has 259 states and 332 transitions. [2022-11-16 12:09:11,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-16 12:09:11,355 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 332 transitions. [2022-11-16 12:09:11,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-11-16 12:09:11,358 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:09:11,359 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:09:11,369 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c727f3e-673f-429f-bb8d-7441f8a93e75/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-16 12:09:11,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c727f3e-673f-429f-bb8d-7441f8a93e75/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:09:11,565 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:09:11,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:09:11,565 INFO L85 PathProgramCache]: Analyzing trace with hash -901611389, now seen corresponding path program 1 times [2022-11-16 12:09:11,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:09:11,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294538727] [2022-11-16 12:09:11,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:09:11,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:09:11,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:11,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:09:11,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:11,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:09:11,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:11,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-11-16 12:09:11,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:11,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:09:11,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:11,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-11-16 12:09:11,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:11,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-11-16 12:09:11,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:12,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 12:09:12,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:12,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-11-16 12:09:12,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:12,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-11-16 12:09:12,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:12,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:09:12,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:12,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-11-16 12:09:12,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:12,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-11-16 12:09:12,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:12,312 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-11-16 12:09:12,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:09:12,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294538727] [2022-11-16 12:09:12,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294538727] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:09:12,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741321968] [2022-11-16 12:09:12,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:09:12,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:09:12,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c727f3e-673f-429f-bb8d-7441f8a93e75/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:09:12,315 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c727f3e-673f-429f-bb8d-7441f8a93e75/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:09:12,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c727f3e-673f-429f-bb8d-7441f8a93e75/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-16 12:09:12,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:12,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 12:09:12,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:09:12,783 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-11-16 12:09:12,783 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:09:12,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741321968] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:09:12,784 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:09:12,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 17 [2022-11-16 12:09:12,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919575287] [2022-11-16 12:09:12,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:09:12,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:09:12,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:09:12,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:09:12,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2022-11-16 12:09:12,785 INFO L87 Difference]: Start difference. First operand 259 states and 332 transitions. Second operand has 8 states, 8 states have (on average 7.125) internal successors, (57), 7 states have internal predecessors, (57), 4 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-16 12:09:13,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:09:13,037 INFO L93 Difference]: Finished difference Result 364 states and 467 transitions. [2022-11-16 12:09:13,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 12:09:13,037 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.125) internal successors, (57), 7 states have internal predecessors, (57), 4 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) Word has length 104 [2022-11-16 12:09:13,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:09:13,043 INFO L225 Difference]: With dead ends: 364 [2022-11-16 12:09:13,043 INFO L226 Difference]: Without dead ends: 248 [2022-11-16 12:09:13,044 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2022-11-16 12:09:13,045 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 121 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:09:13,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 449 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 12:09:13,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-11-16 12:09:13,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 248. [2022-11-16 12:09:13,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 169 states have (on average 1.136094674556213) internal successors, (192), 174 states have internal predecessors, (192), 54 states have call successors, (54), 23 states have call predecessors, (54), 24 states have return successors, (70), 50 states have call predecessors, (70), 53 states have call successors, (70) [2022-11-16 12:09:13,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 316 transitions. [2022-11-16 12:09:13,075 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 316 transitions. Word has length 104 [2022-11-16 12:09:13,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:09:13,076 INFO L495 AbstractCegarLoop]: Abstraction has 248 states and 316 transitions. [2022-11-16 12:09:13,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.125) internal successors, (57), 7 states have internal predecessors, (57), 4 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-16 12:09:13,076 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 316 transitions. [2022-11-16 12:09:13,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-11-16 12:09:13,078 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:09:13,078 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:09:13,090 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c727f3e-673f-429f-bb8d-7441f8a93e75/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-16 12:09:13,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c727f3e-673f-429f-bb8d-7441f8a93e75/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-16 12:09:13,285 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:09:13,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:09:13,286 INFO L85 PathProgramCache]: Analyzing trace with hash -225472422, now seen corresponding path program 1 times [2022-11-16 12:09:13,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:09:13,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340045573] [2022-11-16 12:09:13,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:09:13,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:09:13,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:13,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:09:13,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:13,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:09:13,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:13,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-11-16 12:09:13,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:13,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:09:13,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:13,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-11-16 12:09:13,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:13,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-16 12:09:13,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:13,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 12:09:13,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:14,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-11-16 12:09:14,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:14,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-11-16 12:09:14,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:14,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:09:14,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:14,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-11-16 12:09:14,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:14,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-11-16 12:09:14,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:14,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 12:09:14,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:14,115 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-11-16 12:09:14,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:09:14,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340045573] [2022-11-16 12:09:14,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340045573] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:09:14,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263114846] [2022-11-16 12:09:14,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:09:14,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:09:14,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c727f3e-673f-429f-bb8d-7441f8a93e75/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:09:14,117 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c727f3e-673f-429f-bb8d-7441f8a93e75/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:09:14,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c727f3e-673f-429f-bb8d-7441f8a93e75/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-16 12:09:14,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:14,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-16 12:09:14,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:09:14,728 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 67 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-16 12:09:14,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:09:14,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-16 12:09:15,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-16 12:09:15,172 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-11-16 12:09:15,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-11-16 12:09:15,326 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-11-16 12:09:15,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263114846] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:09:15,326 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:09:15,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15, 14] total 28 [2022-11-16 12:09:15,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084702843] [2022-11-16 12:09:15,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:09:15,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-16 12:09:15,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:09:15,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-16 12:09:15,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2022-11-16 12:09:15,329 INFO L87 Difference]: Start difference. First operand 248 states and 316 transitions. Second operand has 28 states, 26 states have (on average 5.115384615384615) internal successors, (133), 23 states have internal predecessors, (133), 8 states have call successors, (27), 4 states have call predecessors, (27), 6 states have return successors, (26), 7 states have call predecessors, (26), 8 states have call successors, (26) [2022-11-16 12:09:16,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:09:16,309 INFO L93 Difference]: Finished difference Result 428 states and 599 transitions. [2022-11-16 12:09:16,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-16 12:09:16,310 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 5.115384615384615) internal successors, (133), 23 states have internal predecessors, (133), 8 states have call successors, (27), 4 states have call predecessors, (27), 6 states have return successors, (26), 7 states have call predecessors, (26), 8 states have call successors, (26) Word has length 115 [2022-11-16 12:09:16,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:09:16,312 INFO L225 Difference]: With dead ends: 428 [2022-11-16 12:09:16,312 INFO L226 Difference]: Without dead ends: 279 [2022-11-16 12:09:16,314 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=172, Invalid=1234, Unknown=0, NotChecked=0, Total=1406 [2022-11-16 12:09:16,315 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 142 mSDsluCounter, 1528 mSDsCounter, 0 mSdLazyCounter, 830 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 1630 SdHoareTripleChecker+Invalid, 885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 830 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:09:16,316 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 1630 Invalid, 885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 830 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-16 12:09:16,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2022-11-16 12:09:16,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 258. [2022-11-16 12:09:16,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 178 states have (on average 1.1404494382022472) internal successors, (203), 182 states have internal predecessors, (203), 54 states have call successors, (54), 23 states have call predecessors, (54), 25 states have return successors, (72), 52 states have call predecessors, (72), 53 states have call successors, (72) [2022-11-16 12:09:16,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 329 transitions. [2022-11-16 12:09:16,350 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 329 transitions. Word has length 115 [2022-11-16 12:09:16,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:09:16,351 INFO L495 AbstractCegarLoop]: Abstraction has 258 states and 329 transitions. [2022-11-16 12:09:16,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 5.115384615384615) internal successors, (133), 23 states have internal predecessors, (133), 8 states have call successors, (27), 4 states have call predecessors, (27), 6 states have return successors, (26), 7 states have call predecessors, (26), 8 states have call successors, (26) [2022-11-16 12:09:16,351 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 329 transitions. [2022-11-16 12:09:16,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-11-16 12:09:16,353 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:09:16,353 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:09:16,359 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c727f3e-673f-429f-bb8d-7441f8a93e75/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-16 12:09:16,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c727f3e-673f-429f-bb8d-7441f8a93e75/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-16 12:09:16,559 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:09:16,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:09:16,560 INFO L85 PathProgramCache]: Analyzing trace with hash -21699882, now seen corresponding path program 1 times [2022-11-16 12:09:16,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:09:16,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389446021] [2022-11-16 12:09:16,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:09:16,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:09:16,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:16,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:09:16,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:16,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:09:16,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:16,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-11-16 12:09:16,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:16,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:09:16,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:16,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-11-16 12:09:16,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:16,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-16 12:09:16,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:16,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 12:09:17,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:17,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-11-16 12:09:17,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:17,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-11-16 12:09:17,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:17,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:09:17,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:17,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-11-16 12:09:17,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:17,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-11-16 12:09:17,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:17,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 12:09:17,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:17,101 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-11-16 12:09:17,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:09:17,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389446021] [2022-11-16 12:09:17,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389446021] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:09:17,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723414204] [2022-11-16 12:09:17,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:09:17,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:09:17,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c727f3e-673f-429f-bb8d-7441f8a93e75/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:09:17,116 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c727f3e-673f-429f-bb8d-7441f8a93e75/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:09:17,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c727f3e-673f-429f-bb8d-7441f8a93e75/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-16 12:09:17,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:17,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-16 12:09:17,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:09:17,639 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 67 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-16 12:09:17,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:09:18,130 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 2 proven. 24 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-11-16 12:09:18,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723414204] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:09:18,130 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:09:18,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 12] total 25 [2022-11-16 12:09:18,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264891257] [2022-11-16 12:09:18,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:09:18,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-16 12:09:18,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:09:18,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-16 12:09:18,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2022-11-16 12:09:18,132 INFO L87 Difference]: Start difference. First operand 258 states and 329 transitions. Second operand has 25 states, 22 states have (on average 6.454545454545454) internal successors, (142), 22 states have internal predecessors, (142), 11 states have call successors, (34), 5 states have call predecessors, (34), 5 states have return successors, (30), 6 states have call predecessors, (30), 11 states have call successors, (30) [2022-11-16 12:09:18,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:09:18,872 INFO L93 Difference]: Finished difference Result 426 states and 578 transitions. [2022-11-16 12:09:18,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 12:09:18,873 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 22 states have (on average 6.454545454545454) internal successors, (142), 22 states have internal predecessors, (142), 11 states have call successors, (34), 5 states have call predecessors, (34), 5 states have return successors, (30), 6 states have call predecessors, (30), 11 states have call successors, (30) Word has length 115 [2022-11-16 12:09:18,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:09:18,875 INFO L225 Difference]: With dead ends: 426 [2022-11-16 12:09:18,875 INFO L226 Difference]: Without dead ends: 257 [2022-11-16 12:09:18,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 241 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=142, Invalid=980, Unknown=0, NotChecked=0, Total=1122 [2022-11-16 12:09:18,877 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 215 mSDsluCounter, 1133 mSDsCounter, 0 mSdLazyCounter, 678 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 1223 SdHoareTripleChecker+Invalid, 780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:09:18,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 1223 Invalid, 780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 678 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 12:09:18,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2022-11-16 12:09:18,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 245. [2022-11-16 12:09:18,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 170 states have (on average 1.1235294117647059) internal successors, (191), 173 states have internal predecessors, (191), 50 states have call successors, (50), 23 states have call predecessors, (50), 24 states have return successors, (64), 48 states have call predecessors, (64), 49 states have call successors, (64) [2022-11-16 12:09:18,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 305 transitions. [2022-11-16 12:09:18,907 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 305 transitions. Word has length 115 [2022-11-16 12:09:18,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:09:18,908 INFO L495 AbstractCegarLoop]: Abstraction has 245 states and 305 transitions. [2022-11-16 12:09:18,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 22 states have (on average 6.454545454545454) internal successors, (142), 22 states have internal predecessors, (142), 11 states have call successors, (34), 5 states have call predecessors, (34), 5 states have return successors, (30), 6 states have call predecessors, (30), 11 states have call successors, (30) [2022-11-16 12:09:18,908 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 305 transitions. [2022-11-16 12:09:18,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-16 12:09:18,910 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:09:18,910 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:09:18,923 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c727f3e-673f-429f-bb8d-7441f8a93e75/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-16 12:09:19,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c727f3e-673f-429f-bb8d-7441f8a93e75/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-16 12:09:19,117 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:09:19,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:09:19,117 INFO L85 PathProgramCache]: Analyzing trace with hash -835587752, now seen corresponding path program 1 times [2022-11-16 12:09:19,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:09:19,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654698467] [2022-11-16 12:09:19,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:09:19,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:09:19,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:19,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:09:19,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:19,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:09:19,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:19,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-16 12:09:19,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:19,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:09:19,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:19,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-16 12:09:19,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:19,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-11-16 12:09:19,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:19,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 12:09:19,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:19,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-11-16 12:09:19,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:19,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-11-16 12:09:19,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:19,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:09:19,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:19,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-11-16 12:09:19,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:19,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-11-16 12:09:19,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:20,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 12:09:20,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:20,423 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-11-16 12:09:20,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:09:20,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654698467] [2022-11-16 12:09:20,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654698467] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:09:20,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652652936] [2022-11-16 12:09:20,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:09:20,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:09:20,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c727f3e-673f-429f-bb8d-7441f8a93e75/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:09:20,425 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c727f3e-673f-429f-bb8d-7441f8a93e75/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:09:20,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c727f3e-673f-429f-bb8d-7441f8a93e75/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-16 12:09:20,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:20,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 72 conjunts are in the unsatisfiable core [2022-11-16 12:09:20,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:09:20,787 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 12:09:20,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-16 12:09:22,125 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 58 proven. 11 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-16 12:09:22,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:09:23,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 113 [2022-11-16 12:09:23,509 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 105 [2022-11-16 12:09:23,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 101 [2022-11-16 12:09:23,637 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-11-16 12:09:23,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652652936] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:09:23,637 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:09:23,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 20] total 52 [2022-11-16 12:09:23,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019687958] [2022-11-16 12:09:23,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:09:23,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-11-16 12:09:23,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:09:23,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-11-16 12:09:23,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=2469, Unknown=0, NotChecked=0, Total=2652 [2022-11-16 12:09:23,640 INFO L87 Difference]: Start difference. First operand 245 states and 305 transitions. Second operand has 52 states, 50 states have (on average 3.14) internal successors, (157), 50 states have internal predecessors, (157), 17 states have call successors, (31), 5 states have call predecessors, (31), 11 states have return successors, (30), 14 states have call predecessors, (30), 16 states have call successors, (30) [2022-11-16 12:09:26,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:09:26,576 INFO L93 Difference]: Finished difference Result 472 states and 620 transitions. [2022-11-16 12:09:26,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-16 12:09:26,577 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 50 states have (on average 3.14) internal successors, (157), 50 states have internal predecessors, (157), 17 states have call successors, (31), 5 states have call predecessors, (31), 11 states have return successors, (30), 14 states have call predecessors, (30), 16 states have call successors, (30) Word has length 113 [2022-11-16 12:09:26,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:09:26,579 INFO L225 Difference]: With dead ends: 472 [2022-11-16 12:09:26,579 INFO L226 Difference]: Without dead ends: 367 [2022-11-16 12:09:26,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 219 SyntacticMatches, 8 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1101 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=501, Invalid=5049, Unknown=0, NotChecked=0, Total=5550 [2022-11-16 12:09:26,582 INFO L413 NwaCegarLoop]: 168 mSDtfsCounter, 277 mSDsluCounter, 3735 mSDsCounter, 0 mSdLazyCounter, 1835 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 3903 SdHoareTripleChecker+Invalid, 2527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 1835 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 585 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:09:26,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [298 Valid, 3903 Invalid, 2527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 1835 Invalid, 0 Unknown, 585 Unchecked, 1.6s Time] [2022-11-16 12:09:26,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2022-11-16 12:09:26,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 282. [2022-11-16 12:09:26,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 201 states have (on average 1.1343283582089552) internal successors, (228), 203 states have internal predecessors, (228), 53 states have call successors, (53), 27 states have call predecessors, (53), 27 states have return successors, (65), 51 states have call predecessors, (65), 52 states have call successors, (65) [2022-11-16 12:09:26,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 346 transitions. [2022-11-16 12:09:26,620 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 346 transitions. Word has length 113 [2022-11-16 12:09:26,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:09:26,621 INFO L495 AbstractCegarLoop]: Abstraction has 282 states and 346 transitions. [2022-11-16 12:09:26,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 50 states have (on average 3.14) internal successors, (157), 50 states have internal predecessors, (157), 17 states have call successors, (31), 5 states have call predecessors, (31), 11 states have return successors, (30), 14 states have call predecessors, (30), 16 states have call successors, (30) [2022-11-16 12:09:26,621 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 346 transitions. [2022-11-16 12:09:26,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-16 12:09:26,623 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:09:26,623 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:09:26,634 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c727f3e-673f-429f-bb8d-7441f8a93e75/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-11-16 12:09:26,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c727f3e-673f-429f-bb8d-7441f8a93e75/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-16 12:09:26,829 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:09:26,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:09:26,830 INFO L85 PathProgramCache]: Analyzing trace with hash -1063081196, now seen corresponding path program 1 times [2022-11-16 12:09:26,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:09:26,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216650160] [2022-11-16 12:09:26,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:09:26,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:09:26,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:27,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:09:27,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:27,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:09:27,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:27,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-11-16 12:09:27,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:27,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:09:27,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:27,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-11-16 12:09:27,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:27,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-11-16 12:09:27,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:27,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 12:09:27,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:27,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-16 12:09:27,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:27,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-11-16 12:09:27,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:27,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-11-16 12:09:27,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:27,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:09:27,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:27,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-11-16 12:09:27,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:27,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-11-16 12:09:27,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:27,542 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-11-16 12:09:27,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:09:27,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216650160] [2022-11-16 12:09:27,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216650160] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:09:27,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132029862] [2022-11-16 12:09:27,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:09:27,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:09:27,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c727f3e-673f-429f-bb8d-7441f8a93e75/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:09:27,544 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c727f3e-673f-429f-bb8d-7441f8a93e75/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:09:27,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c727f3e-673f-429f-bb8d-7441f8a93e75/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-16 12:09:27,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:27,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-16 12:09:27,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:09:28,184 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-16 12:09:28,184 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:09:28,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132029862] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:09:28,184 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:09:28,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 13 [2022-11-16 12:09:28,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356853729] [2022-11-16 12:09:28,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:09:28,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 12:09:28,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:09:28,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 12:09:28,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-11-16 12:09:28,186 INFO L87 Difference]: Start difference. First operand 282 states and 346 transitions. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 8 states have internal predecessors, (71), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-16 12:09:28,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:09:28,456 INFO L93 Difference]: Finished difference Result 436 states and 553 transitions. [2022-11-16 12:09:28,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 12:09:28,457 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 8 states have internal predecessors, (71), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 114 [2022-11-16 12:09:28,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:09:28,460 INFO L225 Difference]: With dead ends: 436 [2022-11-16 12:09:28,460 INFO L226 Difference]: Without dead ends: 294 [2022-11-16 12:09:28,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2022-11-16 12:09:28,462 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 20 mSDsluCounter, 577 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 692 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 97 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:09:28,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 692 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 93 Invalid, 0 Unknown, 97 Unchecked, 0.1s Time] [2022-11-16 12:09:28,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2022-11-16 12:09:28,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 280. [2022-11-16 12:09:28,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 199 states have (on average 1.120603015075377) internal successors, (223), 202 states have internal predecessors, (223), 53 states have call successors, (53), 27 states have call predecessors, (53), 27 states have return successors, (65), 50 states have call predecessors, (65), 52 states have call successors, (65) [2022-11-16 12:09:28,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 341 transitions. [2022-11-16 12:09:28,499 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 341 transitions. Word has length 114 [2022-11-16 12:09:28,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:09:28,499 INFO L495 AbstractCegarLoop]: Abstraction has 280 states and 341 transitions. [2022-11-16 12:09:28,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 8 states have internal predecessors, (71), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-16 12:09:28,500 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 341 transitions. [2022-11-16 12:09:28,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-16 12:09:28,501 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:09:28,502 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:09:28,513 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c727f3e-673f-429f-bb8d-7441f8a93e75/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-16 12:09:28,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c727f3e-673f-429f-bb8d-7441f8a93e75/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-16 12:09:28,713 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:09:28,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:09:28,713 INFO L85 PathProgramCache]: Analyzing trace with hash -376942188, now seen corresponding path program 1 times [2022-11-16 12:09:28,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:09:28,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819169416] [2022-11-16 12:09:28,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:09:28,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:09:28,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:28,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:09:28,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:28,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:09:28,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:28,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-11-16 12:09:28,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:28,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:09:28,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:28,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-11-16 12:09:28,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:28,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-16 12:09:28,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:29,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 12:09:29,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:29,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-16 12:09:29,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:29,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-11-16 12:09:29,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:29,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-11-16 12:09:29,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:29,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:09:29,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:29,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-11-16 12:09:29,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:29,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-11-16 12:09:29,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:29,157 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-11-16 12:09:29,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:09:29,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819169416] [2022-11-16 12:09:29,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819169416] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:09:29,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802084580] [2022-11-16 12:09:29,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:09:29,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:09:29,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c727f3e-673f-429f-bb8d-7441f8a93e75/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:09:29,160 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c727f3e-673f-429f-bb8d-7441f8a93e75/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:09:29,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c727f3e-673f-429f-bb8d-7441f8a93e75/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-16 12:09:29,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:29,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-16 12:09:29,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:09:29,514 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 12:09:29,515 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-16 12:09:29,530 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 12:09:29,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-16 12:09:31,699 WARN L855 $PredicateComparison]: unable to prove that (or (exists ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_14| Int) (|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_13| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_14|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_13|) 0))) (exists ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_14| Int) (|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_13| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_14|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_13|) 0)))) is different from true [2022-11-16 12:09:33,781 WARN L855 $PredicateComparison]: unable to prove that (or (exists ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_15| Int) (|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_14| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_15|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_14|) 0))) (exists ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_15| Int) (|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_14| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_15|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_14|) 0)))) is different from true [2022-11-16 12:09:35,897 WARN L855 $PredicateComparison]: unable to prove that (or (exists ((v_aws_linked_list_back_~list.base_BEFORE_CALL_54 Int) (v_aws_linked_list_back_~list.offset_BEFORE_CALL_47 Int)) (not (= (select (select |c_#memory_$Pointer$.base| v_aws_linked_list_back_~list.base_BEFORE_CALL_54) v_aws_linked_list_back_~list.offset_BEFORE_CALL_47) 0))) (exists ((v_aws_linked_list_back_~list.base_BEFORE_CALL_54 Int) (v_aws_linked_list_back_~list.offset_BEFORE_CALL_47 Int)) (not (= (select (select |c_#memory_$Pointer$.offset| v_aws_linked_list_back_~list.base_BEFORE_CALL_54) v_aws_linked_list_back_~list.offset_BEFORE_CALL_47) 0)))) is different from true [2022-11-16 12:09:37,985 WARN L855 $PredicateComparison]: unable to prove that (or (exists ((v_aws_linked_list_back_~list.base_BEFORE_CALL_55 Int) (v_aws_linked_list_back_~list.offset_BEFORE_CALL_48 Int)) (not (= (select (select |c_#memory_$Pointer$.base| v_aws_linked_list_back_~list.base_BEFORE_CALL_55) v_aws_linked_list_back_~list.offset_BEFORE_CALL_48) 0))) (exists ((v_aws_linked_list_back_~list.base_BEFORE_CALL_55 Int) (v_aws_linked_list_back_~list.offset_BEFORE_CALL_48 Int)) (not (= (select (select |c_#memory_$Pointer$.offset| v_aws_linked_list_back_~list.base_BEFORE_CALL_55) v_aws_linked_list_back_~list.offset_BEFORE_CALL_48) 0)))) is different from true [2022-11-16 12:09:40,085 WARN L855 $PredicateComparison]: unable to prove that (or (exists ((v_aws_linked_list_back_~list.base_BEFORE_CALL_56 Int) (v_aws_linked_list_back_~list.offset_BEFORE_CALL_49 Int)) (not (= (select (select |c_#memory_$Pointer$.offset| v_aws_linked_list_back_~list.base_BEFORE_CALL_56) v_aws_linked_list_back_~list.offset_BEFORE_CALL_49) 0))) (exists ((v_aws_linked_list_back_~list.base_BEFORE_CALL_56 Int) (v_aws_linked_list_back_~list.offset_BEFORE_CALL_49 Int)) (not (= (select (select |c_#memory_$Pointer$.base| v_aws_linked_list_back_~list.base_BEFORE_CALL_56) v_aws_linked_list_back_~list.offset_BEFORE_CALL_49) 0)))) is different from true [2022-11-16 12:09:42,170 WARN L855 $PredicateComparison]: unable to prove that (or (exists ((v_aws_linked_list_back_~list.base_BEFORE_CALL_57 Int) (v_aws_linked_list_back_~list.offset_BEFORE_CALL_50 Int)) (not (= (select (select |c_#memory_$Pointer$.base| v_aws_linked_list_back_~list.base_BEFORE_CALL_57) v_aws_linked_list_back_~list.offset_BEFORE_CALL_50) 0))) (exists ((v_aws_linked_list_back_~list.base_BEFORE_CALL_57 Int) (v_aws_linked_list_back_~list.offset_BEFORE_CALL_50 Int)) (not (= (select (select |c_#memory_$Pointer$.offset| v_aws_linked_list_back_~list.base_BEFORE_CALL_57) v_aws_linked_list_back_~list.offset_BEFORE_CALL_50) 0)))) is different from true [2022-11-16 12:09:50,240 WARN L233 SmtUtils]: Spent 6.02s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:09:58,335 WARN L233 SmtUtils]: Spent 6.03s on a formula simplification that was a NOOP. DAG size: 33 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:10:06,441 WARN L233 SmtUtils]: Spent 6.03s on a formula simplification that was a NOOP. DAG size: 33 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:10:12,528 WARN L233 SmtUtils]: Spent 6.02s on a formula simplification that was a NOOP. DAG size: 25 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:10:12,604 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 45 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 19 not checked. [2022-11-16 12:10:12,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:10:15,225 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-11-16 12:10:15,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802084580] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:10:15,226 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:10:15,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 18, 11] total 31 [2022-11-16 12:10:15,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141431331] [2022-11-16 12:10:15,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:10:15,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-16 12:10:15,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:10:15,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-16 12:10:15,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=530, Unknown=10, NotChecked=306, Total=930 [2022-11-16 12:10:15,228 INFO L87 Difference]: Start difference. First operand 280 states and 341 transitions. Second operand has 31 states, 30 states have (on average 4.333333333333333) internal successors, (130), 29 states have internal predecessors, (130), 8 states have call successors, (27), 8 states have call predecessors, (27), 11 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2022-11-16 12:10:39,828 WARN L855 $PredicateComparison]: unable to prove that (and (or (exists ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_14| Int) (|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_13| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_14|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_13|) 0))) (exists ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_14| Int) (|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_13| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_14|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_13|) 0)))) (or (exists ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_15| Int) (|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_14| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_15|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_14|) 0))) (exists ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_15| Int) (|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_14| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_15|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_14|) 0))))) is different from true [2022-11-16 12:10:52,015 WARN L233 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 20 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:11:00,061 WARN L233 SmtUtils]: Spent 6.02s on a formula simplification that was a NOOP. DAG size: 25 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:11:08,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:11:08,523 INFO L93 Difference]: Finished difference Result 428 states and 536 transitions. [2022-11-16 12:11:08,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-16 12:11:08,523 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 4.333333333333333) internal successors, (130), 29 states have internal predecessors, (130), 8 states have call successors, (27), 8 states have call predecessors, (27), 11 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) Word has length 112 [2022-11-16 12:11:08,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:11:08,525 INFO L225 Difference]: With dead ends: 428 [2022-11-16 12:11:08,526 INFO L226 Difference]: Without dead ends: 290 [2022-11-16 12:11:08,527 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 223 SyntacticMatches, 9 SemanticMatches, 46 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 97.5s TimeCoverageRelationStatistics Valid=238, Invalid=1405, Unknown=25, NotChecked=588, Total=2256 [2022-11-16 12:11:08,528 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 173 mSDsluCounter, 1067 mSDsCounter, 0 mSdLazyCounter, 629 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 1175 SdHoareTripleChecker+Invalid, 1684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1041 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:11:08,528 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 1175 Invalid, 1684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 629 Invalid, 0 Unknown, 1041 Unchecked, 0.5s Time] [2022-11-16 12:11:08,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-11-16 12:11:08,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 270. [2022-11-16 12:11:08,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 190 states have (on average 1.1157894736842104) internal successors, (212), 193 states have internal predecessors, (212), 53 states have call successors, (53), 26 states have call predecessors, (53), 26 states have return successors, (63), 50 states have call predecessors, (63), 52 states have call successors, (63) [2022-11-16 12:11:08,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 328 transitions. [2022-11-16 12:11:08,600 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 328 transitions. Word has length 112 [2022-11-16 12:11:08,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:11:08,601 INFO L495 AbstractCegarLoop]: Abstraction has 270 states and 328 transitions. [2022-11-16 12:11:08,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 4.333333333333333) internal successors, (130), 29 states have internal predecessors, (130), 8 states have call successors, (27), 8 states have call predecessors, (27), 11 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2022-11-16 12:11:08,601 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 328 transitions. [2022-11-16 12:11:08,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-16 12:11:08,603 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:11:08,603 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:11:08,615 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c727f3e-673f-429f-bb8d-7441f8a93e75/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-16 12:11:08,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c727f3e-673f-429f-bb8d-7441f8a93e75/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-16 12:11:08,810 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:11:08,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:11:08,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1093753190, now seen corresponding path program 1 times [2022-11-16 12:11:08,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:11:08,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012802765] [2022-11-16 12:11:08,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:11:08,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:11:08,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:10,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:11:10,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:10,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:11:10,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:10,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-16 12:11:10,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:10,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:11:10,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:10,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-16 12:11:10,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:10,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-11-16 12:11:10,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:11,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 12:11:11,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:11,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-11-16 12:11:11,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:11,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-11-16 12:11:11,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:11,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:11:11,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:11,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-11-16 12:11:11,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:11,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-11-16 12:11:11,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:11,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 12:11:11,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:12,131 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-11-16 12:11:12,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:11:12,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012802765] [2022-11-16 12:11:12,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012802765] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:11:12,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457292079] [2022-11-16 12:11:12,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:11:12,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:11:12,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c727f3e-673f-429f-bb8d-7441f8a93e75/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:11:12,133 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c727f3e-673f-429f-bb8d-7441f8a93e75/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:11:12,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c727f3e-673f-429f-bb8d-7441f8a93e75/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-16 12:11:12,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:12,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 131 conjunts are in the unsatisfiable core [2022-11-16 12:11:12,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:11:12,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2022-11-16 12:11:12,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 12:11:12,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2022-11-16 12:11:12,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 12:11:16,498 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 66 proven. 17 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-16 12:11:16,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:11:28,114 WARN L233 SmtUtils]: Spent 10.06s on a formula simplification that was a NOOP. DAG size: 26 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:11:40,325 WARN L233 SmtUtils]: Spent 12.07s on a formula simplification that was a NOOP. DAG size: 29 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:11:42,290 INFO L321 Elim1Store]: treesize reduction 23, result has 86.1 percent of original size [2022-11-16 12:11:42,291 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 5044 treesize of output 4907 [2022-11-16 12:11:42,771 INFO L321 Elim1Store]: treesize reduction 23, result has 89.1 percent of original size [2022-11-16 12:11:42,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 57336 treesize of output 53431 [2022-11-16 12:11:43,374 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:11:43,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 63295 treesize of output 60373 [2022-11-16 12:11:45,902 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:11:45,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 73234 treesize of output 70452 [2022-11-16 12:11:47,116 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:11:47,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 69692 treesize of output 67379 [2022-11-16 12:11:48,781 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:11:48,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 66752 treesize of output 65067