./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_ignore_case_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_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/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_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_ignore_case_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/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_4da24006-d90e-49e9-876e-79ba1da78b92/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 82914be9df39aade96902f979c145aa97bb18d611f7f0e9a90ee0ab6b53af5a2 --- 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 12:42:21,427 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 12:42:21,430 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 12:42:21,451 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 12:42:21,451 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 12:42:21,453 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 12:42:21,454 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 12:42:21,456 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 12:42:21,458 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 12:42:21,459 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 12:42:21,460 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 12:42:21,461 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 12:42:21,462 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 12:42:21,463 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 12:42:21,465 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 12:42:21,466 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 12:42:21,467 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 12:42:21,468 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 12:42:21,470 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 12:42:21,472 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 12:42:21,474 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 12:42:21,476 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 12:42:21,478 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 12:42:21,479 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 12:42:21,483 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 12:42:21,484 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 12:42:21,484 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 12:42:21,485 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 12:42:21,486 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 12:42:21,495 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 12:42:21,496 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 12:42:21,497 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 12:42:21,499 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 12:42:21,500 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 12:42:21,502 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 12:42:21,503 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 12:42:21,505 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 12:42:21,505 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 12:42:21,506 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 12:42:21,506 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 12:42:21,508 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 12:42:21,509 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-11-16 12:42:21,533 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 12:42:21,533 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 12:42:21,533 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 12:42:21,534 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 12:42:21,534 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 12:42:21,535 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 12:42:21,535 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 12:42:21,536 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 12:42:21,536 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 12:42:21,536 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 12:42:21,536 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 12:42:21,537 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 12:42:21,537 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 12:42:21,537 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 12:42:21,537 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 12:42:21,538 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 12:42:21,538 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 12:42:21,538 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 12:42:21,538 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 12:42:21,539 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 12:42:21,539 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 12:42:21,539 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:42:21,539 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 12:42:21,540 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 12:42:21,540 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 12:42:21,540 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 12:42:21,540 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 12:42:21,540 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 12:42:21,541 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 12:42:21,541 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 12:42:21,541 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_4da24006-d90e-49e9-876e-79ba1da78b92/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 82914be9df39aade96902f979c145aa97bb18d611f7f0e9a90ee0ab6b53af5a2 [2022-11-16 12:42:21,844 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 12:42:21,893 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 12:42:21,896 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 12:42:21,897 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 12:42:21,898 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 12:42:21,900 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_ignore_case_harness.i [2022-11-16 12:42:21,980 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/data/548b8555f/f47f4dba50e546e8a32f0fbc409cd274/FLAGda8b7444d [2022-11-16 12:42:23,001 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 12:42:23,002 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_ignore_case_harness.i [2022-11-16 12:42:23,064 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/data/548b8555f/f47f4dba50e546e8a32f0fbc409cd274/FLAGda8b7444d [2022-11-16 12:42:23,385 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/data/548b8555f/f47f4dba50e546e8a32f0fbc409cd274 [2022-11-16 12:42:23,388 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 12:42:23,392 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 12:42:23,395 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 12:42:23,395 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 12:42:23,401 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 12:42:23,402 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:42:23" (1/1) ... [2022-11-16 12:42:23,403 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7772e2fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:42:23, skipping insertion in model container [2022-11-16 12:42:23,403 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:42:23" (1/1) ... [2022-11-16 12:42:23,411 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 12:42:23,549 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 12:42:23,924 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_4da24006-d90e-49e9-876e-79ba1da78b92/sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_ignore_case_harness.i[4501,4514] [2022-11-16 12:42:23,931 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_4da24006-d90e-49e9-876e-79ba1da78b92/sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_ignore_case_harness.i[4561,4574] [2022-11-16 12:42:25,046 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 12:42:25,047 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 12:42:25,048 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 12:42:25,049 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 12:42:25,050 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 12:42:25,065 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 12:42:25,066 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 12:42:25,068 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 12:42:25,069 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 12:42:25,496 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-16 12:42:25,498 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-16 12:42:25,499 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-16 12:42:25,501 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-16 12:42:25,502 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-16 12:42:25,503 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-16 12:42:25,504 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-16 12:42:25,505 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-16 12:42:25,506 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-16 12:42:25,507 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-16 12:42:25,703 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-16 12:42:25,909 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 12:42:25,910 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 12:42:26,006 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:42:26,059 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 12:42:26,074 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_4da24006-d90e-49e9-876e-79ba1da78b92/sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_ignore_case_harness.i[4501,4514] [2022-11-16 12:42:26,075 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_4da24006-d90e-49e9-876e-79ba1da78b92/sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_ignore_case_harness.i[4561,4574] [2022-11-16 12:42:26,114 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 12:42:26,115 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 12:42:26,116 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 12:42:26,116 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 12:42:26,117 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 12:42:26,125 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 12:42:26,126 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 12:42:26,127 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 12:42:26,128 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 12:42:26,184 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-16 12:42:26,185 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-16 12:42:26,186 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-16 12:42:26,187 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-16 12:42:26,188 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-16 12:42:26,189 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-16 12:42:26,190 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-16 12:42:26,190 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-16 12:42:26,191 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-16 12:42:26,194 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-16 12:42:26,234 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-16 12:42:26,339 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 12:42:26,339 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 12:42:26,400 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:42:26,666 INFO L208 MainTranslator]: Completed translation [2022-11-16 12:42:26,667 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:42:26 WrapperNode [2022-11-16 12:42:26,667 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 12:42:26,668 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 12:42:26,668 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 12:42:26,668 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 12:42:26,676 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:42:26" (1/1) ... [2022-11-16 12:42:26,849 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:42:26" (1/1) ... [2022-11-16 12:42:26,957 INFO L138 Inliner]: procedures = 691, calls = 2661, calls flagged for inlining = 59, calls inlined = 5, statements flattened = 862 [2022-11-16 12:42:26,957 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 12:42:26,958 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 12:42:26,958 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 12:42:26,958 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 12:42:26,972 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:42:26" (1/1) ... [2022-11-16 12:42:26,972 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:42:26" (1/1) ... [2022-11-16 12:42:26,987 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:42:26" (1/1) ... [2022-11-16 12:42:26,988 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:42:26" (1/1) ... [2022-11-16 12:42:27,044 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:42:26" (1/1) ... [2022-11-16 12:42:27,049 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:42:26" (1/1) ... [2022-11-16 12:42:27,055 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:42:26" (1/1) ... [2022-11-16 12:42:27,067 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:42:26" (1/1) ... [2022-11-16 12:42:27,075 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 12:42:27,091 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 12:42:27,091 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 12:42:27,091 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 12:42:27,102 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:42:26" (1/1) ... [2022-11-16 12:42:27,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:42:27,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:42:27,143 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 12:42:27,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 12:42:27,193 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_valid [2022-11-16 12:42:27,193 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_valid [2022-11-16 12:42:27,193 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_eq_ignore_case [2022-11-16 12:42:27,193 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_eq_ignore_case [2022-11-16 12:42:27,194 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 12:42:27,194 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2022-11-16 12:42:27,194 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2022-11-16 12:42:27,195 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 12:42:27,195 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-16 12:42:27,195 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-16 12:42:27,196 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-16 12:42:27,197 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 12:42:27,197 INFO L130 BoogieDeclarations]: Found specification of procedure save_byte_from_array [2022-11-16 12:42:27,198 INFO L138 BoogieDeclarations]: Found implementation of procedure save_byte_from_array [2022-11-16 12:42:27,198 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-16 12:42:27,199 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_byte_buf_has_allocated_buffer_member [2022-11-16 12:42:27,199 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_byte_buf_has_allocated_buffer_member [2022-11-16 12:42:27,199 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 12:42:27,200 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 12:42:27,200 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2022-11-16 12:42:27,200 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2022-11-16 12:42:27,201 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2022-11-16 12:42:27,201 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2022-11-16 12:42:27,201 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-16 12:42:27,201 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-16 12:42:27,202 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 12:42:27,203 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-16 12:42:27,203 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-16 12:42:27,203 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2022-11-16 12:42:27,203 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2022-11-16 12:42:27,204 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_bounded [2022-11-16 12:42:27,204 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_bounded [2022-11-16 12:42:27,205 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 12:42:27,205 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_buf_equivalence [2022-11-16 12:42:27,205 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_buf_equivalence [2022-11-16 12:42:27,205 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 12:42:27,599 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 12:42:27,602 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 12:42:29,075 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 12:42:29,086 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 12:42:29,087 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-16 12:42:29,089 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:42:29 BoogieIcfgContainer [2022-11-16 12:42:29,090 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 12:42:29,094 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 12:42:29,094 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 12:42:29,098 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 12:42:29,099 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 12:42:23" (1/3) ... [2022-11-16 12:42:29,100 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35cfb588 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:42:29, skipping insertion in model container [2022-11-16 12:42:29,100 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:42:26" (2/3) ... [2022-11-16 12:42:29,100 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35cfb588 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:42:29, skipping insertion in model container [2022-11-16 12:42:29,101 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:42:29" (3/3) ... [2022-11-16 12:42:29,104 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_byte_buf_eq_ignore_case_harness.i [2022-11-16 12:42:29,124 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 12:42:29,125 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 12:42:29,212 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:42:29,225 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;@26ff5bf9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:42:29,225 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-16 12:42:29,230 INFO L276 IsEmpty]: Start isEmpty. Operand has 143 states, 87 states have (on average 1.2413793103448276) internal successors, (108), 88 states have internal predecessors, (108), 42 states have call successors, (42), 12 states have call predecessors, (42), 12 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2022-11-16 12:42:29,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-16 12:42:29,252 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:42:29,253 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:42:29,254 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:42:29,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:42:29,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1731481966, now seen corresponding path program 1 times [2022-11-16 12:42:29,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:42:29,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502893137] [2022-11-16 12:42:29,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:42:29,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:42:29,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:30,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:42:30,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:30,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-16 12:42:30,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:30,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 12:42:30,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:30,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:42:30,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:30,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:42:30,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:30,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:42:30,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:30,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-16 12:42:30,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:30,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-16 12:42:30,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:30,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-16 12:42:30,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:30,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-16 12:42:30,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:30,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-11-16 12:42:30,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:30,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-11-16 12:42:30,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:30,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-11-16 12:42:30,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:30,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-11-16 12:42:30,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:30,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-11-16 12:42:30,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:30,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-11-16 12:42:30,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:30,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:42:30,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:30,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-16 12:42:30,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:30,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-11-16 12:42:30,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:30,556 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-11-16 12:42:30,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:42:30,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502893137] [2022-11-16 12:42:30,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502893137] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:42:30,559 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:42:30,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 12:42:30,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420784612] [2022-11-16 12:42:30,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:42:30,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 12:42:30,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:42:30,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 12:42:30,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:42:30,611 INFO L87 Difference]: Start difference. First operand has 143 states, 87 states have (on average 1.2413793103448276) internal successors, (108), 88 states have internal predecessors, (108), 42 states have call successors, (42), 12 states have call predecessors, (42), 12 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 2 states have internal predecessors, (39), 2 states have call successors, (20), 5 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-16 12:42:31,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:42:31,290 INFO L93 Difference]: Finished difference Result 284 states and 410 transitions. [2022-11-16 12:42:31,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:42:31,292 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 2 states have internal predecessors, (39), 2 states have call successors, (20), 5 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 113 [2022-11-16 12:42:31,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:42:31,303 INFO L225 Difference]: With dead ends: 284 [2022-11-16 12:42:31,303 INFO L226 Difference]: Without dead ends: 140 [2022-11-16 12:42:31,308 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:42:31,312 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 231 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:42:31,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 143 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-16 12:42:31,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-11-16 12:42:31,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 138. [2022-11-16 12:42:31,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 83 states have (on average 1.216867469879518) internal successors, (101), 84 states have internal predecessors, (101), 42 states have call successors, (42), 12 states have call predecessors, (42), 12 states have return successors, (41), 41 states have call predecessors, (41), 41 states have call successors, (41) [2022-11-16 12:42:31,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 184 transitions. [2022-11-16 12:42:31,373 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 184 transitions. Word has length 113 [2022-11-16 12:42:31,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:42:31,374 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 184 transitions. [2022-11-16 12:42:31,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 2 states have internal predecessors, (39), 2 states have call successors, (20), 5 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-16 12:42:31,375 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 184 transitions. [2022-11-16 12:42:31,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-16 12:42:31,378 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:42:31,378 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:42:31,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 12:42:31,379 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:42:31,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:42:31,380 INFO L85 PathProgramCache]: Analyzing trace with hash 57376236, now seen corresponding path program 1 times [2022-11-16 12:42:31,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:42:31,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521144306] [2022-11-16 12:42:31,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:42:31,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:42:31,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:32,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:42:32,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:32,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-16 12:42:32,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:32,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 12:42:32,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:32,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:42:32,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:32,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:42:32,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:32,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:42:32,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:32,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-16 12:42:32,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:32,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-16 12:42:32,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:32,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-16 12:42:32,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:32,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-16 12:42:32,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:32,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-11-16 12:42:32,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:32,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-11-16 12:42:32,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:32,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-11-16 12:42:32,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:32,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-11-16 12:42:32,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:32,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-11-16 12:42:32,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:32,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-11-16 12:42:32,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:32,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:42:32,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:32,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-16 12:42:32,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:32,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-11-16 12:42:32,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:32,561 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-11-16 12:42:32,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:42:32,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521144306] [2022-11-16 12:42:32,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521144306] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:42:32,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772160994] [2022-11-16 12:42:32,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:42:32,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:42:32,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:42:32,566 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:42:32,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 12:42:33,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:33,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 2776 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 12:42:33,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:42:33,438 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-11-16 12:42:33,438 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:42:33,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772160994] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:42:33,439 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:42:33,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2022-11-16 12:42:33,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511128388] [2022-11-16 12:42:33,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:42:33,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 12:42:33,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:42:33,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 12:42:33,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-11-16 12:42:33,442 INFO L87 Difference]: Start difference. First operand 138 states and 184 transitions. Second operand has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 3 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-11-16 12:42:33,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:42:33,780 INFO L93 Difference]: Finished difference Result 272 states and 367 transitions. [2022-11-16 12:42:33,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 12:42:33,781 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 3 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 113 [2022-11-16 12:42:33,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:42:33,784 INFO L225 Difference]: With dead ends: 272 [2022-11-16 12:42:33,784 INFO L226 Difference]: Without dead ends: 141 [2022-11-16 12:42:33,785 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-11-16 12:42:33,787 INFO L413 NwaCegarLoop]: 147 mSDtfsCounter, 196 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:42:33,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 407 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 12:42:33,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-11-16 12:42:33,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2022-11-16 12:42:33,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 85 states have (on average 1.2117647058823529) internal successors, (103), 87 states have internal predecessors, (103), 42 states have call successors, (42), 12 states have call predecessors, (42), 13 states have return successors, (47), 41 states have call predecessors, (47), 41 states have call successors, (47) [2022-11-16 12:42:33,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 192 transitions. [2022-11-16 12:42:33,818 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 192 transitions. Word has length 113 [2022-11-16 12:42:33,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:42:33,820 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 192 transitions. [2022-11-16 12:42:33,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 3 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-11-16 12:42:33,821 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 192 transitions. [2022-11-16 12:42:33,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-11-16 12:42:33,834 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:42:33,835 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:42:33,853 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 12:42:34,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:42:34,047 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:42:34,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:42:34,047 INFO L85 PathProgramCache]: Analyzing trace with hash -590863305, now seen corresponding path program 1 times [2022-11-16 12:42:34,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:42:34,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141819179] [2022-11-16 12:42:34,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:42:34,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:42:34,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:35,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:42:35,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:35,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-16 12:42:35,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:35,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 12:42:35,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:35,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:42:35,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:35,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:42:35,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:35,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:42:35,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:35,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-16 12:42:35,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:35,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-16 12:42:35,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:35,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-16 12:42:35,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:35,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-11-16 12:42:35,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:35,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-11-16 12:42:35,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:35,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-11-16 12:42:35,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:35,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-11-16 12:42:35,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:35,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-11-16 12:42:35,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:35,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-11-16 12:42:35,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:35,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-11-16 12:42:35,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:35,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:42:35,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:35,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-16 12:42:35,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:35,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-11-16 12:42:35,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:35,918 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2022-11-16 12:42:35,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:42:35,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141819179] [2022-11-16 12:42:35,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141819179] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:42:35,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657458124] [2022-11-16 12:42:35,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:42:35,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:42:35,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:42:35,921 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:42:35,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 12:42:36,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:36,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 2793 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 12:42:36,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:42:36,875 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-16 12:42:36,876 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:42:36,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657458124] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:42:36,876 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:42:36,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [13] total 18 [2022-11-16 12:42:36,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392801075] [2022-11-16 12:42:36,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:42:36,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 12:42:36,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:42:36,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 12:42:36,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2022-11-16 12:42:36,880 INFO L87 Difference]: Start difference. First operand 141 states and 192 transitions. Second operand has 7 states, 6 states have (on average 9.333333333333334) internal successors, (56), 7 states have internal predecessors, (56), 4 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 3 states have call predecessors, (19), 4 states have call successors, (19) [2022-11-16 12:42:37,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:42:37,270 INFO L93 Difference]: Finished difference Result 227 states and 311 transitions. [2022-11-16 12:42:37,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 12:42:37,271 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 9.333333333333334) internal successors, (56), 7 states have internal predecessors, (56), 4 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 3 states have call predecessors, (19), 4 states have call successors, (19) Word has length 119 [2022-11-16 12:42:37,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:42:37,273 INFO L225 Difference]: With dead ends: 227 [2022-11-16 12:42:37,274 INFO L226 Difference]: Without dead ends: 141 [2022-11-16 12:42:37,275 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2022-11-16 12:42:37,276 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 203 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 650 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:42:37,276 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 650 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 12:42:37,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-11-16 12:42:37,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2022-11-16 12:42:37,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 85 states have (on average 1.2117647058823529) internal successors, (103), 87 states have internal predecessors, (103), 42 states have call successors, (42), 12 states have call predecessors, (42), 13 states have return successors, (45), 41 states have call predecessors, (45), 41 states have call successors, (45) [2022-11-16 12:42:37,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 190 transitions. [2022-11-16 12:42:37,294 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 190 transitions. Word has length 119 [2022-11-16 12:42:37,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:42:37,295 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 190 transitions. [2022-11-16 12:42:37,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 9.333333333333334) internal successors, (56), 7 states have internal predecessors, (56), 4 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 3 states have call predecessors, (19), 4 states have call successors, (19) [2022-11-16 12:42:37,295 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 190 transitions. [2022-11-16 12:42:37,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-11-16 12:42:37,297 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:42:37,298 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:42:37,313 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 12:42:37,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:42:37,508 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:42:37,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:42:37,509 INFO L85 PathProgramCache]: Analyzing trace with hash -1636756019, now seen corresponding path program 2 times [2022-11-16 12:42:37,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:42:37,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377454941] [2022-11-16 12:42:37,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:42:37,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:42:37,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:38,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:42:38,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:38,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-16 12:42:38,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:38,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 12:42:38,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:38,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:42:38,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:38,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:42:38,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:38,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:42:38,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:38,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-16 12:42:38,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:38,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-16 12:42:38,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:38,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-16 12:42:38,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:38,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-11-16 12:42:38,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:38,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-11-16 12:42:38,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:38,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-11-16 12:42:38,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:38,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-11-16 12:42:38,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:38,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-11-16 12:42:38,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:38,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-11-16 12:42:38,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:38,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-11-16 12:42:38,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:38,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:42:38,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:38,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-16 12:42:38,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:38,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-11-16 12:42:38,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:38,492 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2022-11-16 12:42:38,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:42:38,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377454941] [2022-11-16 12:42:38,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377454941] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:42:38,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534406578] [2022-11-16 12:42:38,493 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:42:38,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:42:38,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:42:38,495 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:42:38,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 12:42:39,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:42:39,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:42:39,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 2326 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-16 12:42:39,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:42:39,282 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2022-11-16 12:42:39,282 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:42:39,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534406578] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:42:39,282 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:42:39,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 15 [2022-11-16 12:42:39,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884385606] [2022-11-16 12:42:39,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:42:39,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:42:39,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:42:39,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:42:39,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2022-11-16 12:42:39,285 INFO L87 Difference]: Start difference. First operand 141 states and 190 transitions. Second operand has 8 states, 7 states have (on average 7.142857142857143) internal successors, (50), 6 states have internal predecessors, (50), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) [2022-11-16 12:42:39,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:42:39,434 INFO L93 Difference]: Finished difference Result 153 states and 209 transitions. [2022-11-16 12:42:39,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 12:42:39,435 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.142857142857143) internal successors, (50), 6 states have internal predecessors, (50), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) Word has length 131 [2022-11-16 12:42:39,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:42:39,440 INFO L225 Difference]: With dead ends: 153 [2022-11-16 12:42:39,440 INFO L226 Difference]: Without dead ends: 151 [2022-11-16 12:42:39,441 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2022-11-16 12:42:39,444 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 23 mSDsluCounter, 1063 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 1249 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:42:39,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 1249 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:42:39,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-11-16 12:42:39,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 150. [2022-11-16 12:42:39,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 91 states have (on average 1.1978021978021978) internal successors, (109), 94 states have internal predecessors, (109), 43 states have call successors, (43), 13 states have call predecessors, (43), 15 states have return successors, (54), 42 states have call predecessors, (54), 42 states have call successors, (54) [2022-11-16 12:42:39,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 206 transitions. [2022-11-16 12:42:39,493 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 206 transitions. Word has length 131 [2022-11-16 12:42:39,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:42:39,497 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 206 transitions. [2022-11-16 12:42:39,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.142857142857143) internal successors, (50), 6 states have internal predecessors, (50), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) [2022-11-16 12:42:39,498 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 206 transitions. [2022-11-16 12:42:39,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-11-16 12:42:39,502 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:42:39,502 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:42:39,521 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 12:42:39,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:42:39,712 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:42:39,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:42:39,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1157375339, now seen corresponding path program 1 times [2022-11-16 12:42:39,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:42:39,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615823217] [2022-11-16 12:42:39,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:42:39,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:42:39,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:40,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:42:40,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:40,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-16 12:42:40,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:40,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 12:42:40,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:40,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:42:40,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:40,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:42:40,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:40,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:42:40,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:40,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-16 12:42:40,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:40,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-16 12:42:40,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:40,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-16 12:42:40,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:40,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-11-16 12:42:40,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:40,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-11-16 12:42:40,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:40,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-11-16 12:42:40,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:40,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-11-16 12:42:40,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:40,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-11-16 12:42:40,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:40,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-11-16 12:42:40,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:40,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-11-16 12:42:40,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:40,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:42:40,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:40,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-16 12:42:40,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:40,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-11-16 12:42:40,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:40,857 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2022-11-16 12:42:40,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:42:40,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615823217] [2022-11-16 12:42:40,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615823217] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:42:40,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485588716] [2022-11-16 12:42:40,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:42:40,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:42:40,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:42:40,876 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:42:40,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 12:42:41,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:41,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 2839 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 12:42:41,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:42:41,720 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-16 12:42:41,720 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:42:41,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485588716] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:42:41,721 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:42:41,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 14 [2022-11-16 12:42:41,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678964532] [2022-11-16 12:42:41,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:42:41,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 12:42:41,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:42:41,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 12:42:41,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-11-16 12:42:41,724 INFO L87 Difference]: Start difference. First operand 150 states and 206 transitions. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 4 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2022-11-16 12:42:42,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:42:42,075 INFO L93 Difference]: Finished difference Result 260 states and 358 transitions. [2022-11-16 12:42:42,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 12:42:42,076 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 4 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) Word has length 135 [2022-11-16 12:42:42,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:42:42,078 INFO L225 Difference]: With dead ends: 260 [2022-11-16 12:42:42,078 INFO L226 Difference]: Without dead ends: 147 [2022-11-16 12:42:42,079 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2022-11-16 12:42:42,079 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 202 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 650 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:42:42,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 650 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 12:42:42,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-11-16 12:42:42,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2022-11-16 12:42:42,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 89 states have (on average 1.1910112359550562) internal successors, (106), 91 states have internal predecessors, (106), 43 states have call successors, (43), 13 states have call predecessors, (43), 14 states have return successors, (50), 42 states have call predecessors, (50), 42 states have call successors, (50) [2022-11-16 12:42:42,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 199 transitions. [2022-11-16 12:42:42,096 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 199 transitions. Word has length 135 [2022-11-16 12:42:42,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:42:42,097 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 199 transitions. [2022-11-16 12:42:42,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 4 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2022-11-16 12:42:42,097 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 199 transitions. [2022-11-16 12:42:42,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-11-16 12:42:42,099 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:42:42,100 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:42:42,117 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-16 12:42:42,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:42:42,315 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:42:42,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:42:42,315 INFO L85 PathProgramCache]: Analyzing trace with hash 707842976, now seen corresponding path program 1 times [2022-11-16 12:42:42,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:42:42,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648585981] [2022-11-16 12:42:42,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:42:42,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:42:42,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:43,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:42:43,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:43,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-16 12:42:43,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:43,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 12:42:43,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:43,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:42:43,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:43,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:42:43,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:43,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:42:43,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:43,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-16 12:42:43,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:43,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-16 12:42:43,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:43,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-16 12:42:43,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:43,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-11-16 12:42:43,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:43,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-11-16 12:42:43,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:43,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-11-16 12:42:43,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:43,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-11-16 12:42:43,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:43,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-11-16 12:42:43,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:43,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-11-16 12:42:43,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:43,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-11-16 12:42:43,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:43,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:42:43,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:43,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-16 12:42:43,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:43,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-11-16 12:42:43,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:44,109 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2022-11-16 12:42:44,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:42:44,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648585981] [2022-11-16 12:42:44,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648585981] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:42:44,110 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:42:44,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-16 12:42:44,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833864059] [2022-11-16 12:42:44,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:42:44,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:42:44,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:42:44,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:42:44,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:42:44,112 INFO L87 Difference]: Start difference. First operand 147 states and 199 transitions. Second operand has 8 states, 8 states have (on average 7.25) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (20), 5 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) [2022-11-16 12:42:45,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:42:45,185 INFO L93 Difference]: Finished difference Result 314 states and 443 transitions. [2022-11-16 12:42:45,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:42:45,186 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (20), 5 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) Word has length 141 [2022-11-16 12:42:45,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:42:45,188 INFO L225 Difference]: With dead ends: 314 [2022-11-16 12:42:45,188 INFO L226 Difference]: Without dead ends: 174 [2022-11-16 12:42:45,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2022-11-16 12:42:45,190 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 330 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-16 12:42:45,190 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [342 Valid, 299 Invalid, 681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-16 12:42:45,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-11-16 12:42:45,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 152. [2022-11-16 12:42:45,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 94 states have (on average 1.202127659574468) internal successors, (113), 96 states have internal predecessors, (113), 43 states have call successors, (43), 13 states have call predecessors, (43), 14 states have return successors, (50), 42 states have call predecessors, (50), 42 states have call successors, (50) [2022-11-16 12:42:45,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 206 transitions. [2022-11-16 12:42:45,214 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 206 transitions. Word has length 141 [2022-11-16 12:42:45,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:42:45,216 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 206 transitions. [2022-11-16 12:42:45,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (20), 5 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) [2022-11-16 12:42:45,217 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 206 transitions. [2022-11-16 12:42:45,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-11-16 12:42:45,221 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:42:45,221 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:42:45,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-16 12:42:45,222 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:42:45,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:42:45,223 INFO L85 PathProgramCache]: Analyzing trace with hash 966008414, now seen corresponding path program 1 times [2022-11-16 12:42:45,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:42:45,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993362942] [2022-11-16 12:42:45,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:42:45,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:42:45,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:49,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:42:49,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:49,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-16 12:42:49,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:49,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 12:42:49,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:49,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:42:49,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:50,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:42:50,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:50,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:42:50,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:50,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-16 12:42:50,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:50,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-16 12:42:50,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:50,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-16 12:42:50,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:50,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-11-16 12:42:50,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:50,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-11-16 12:42:50,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:50,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-11-16 12:42:50,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:50,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-11-16 12:42:50,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:50,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-11-16 12:42:50,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:50,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-11-16 12:42:50,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:50,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-11-16 12:42:50,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:51,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:42:51,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:51,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-16 12:42:51,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:51,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-11-16 12:42:51,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:51,248 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 20 proven. 20 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2022-11-16 12:42:51,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:42:51,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993362942] [2022-11-16 12:42:51,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993362942] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:42:51,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039650073] [2022-11-16 12:42:51,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:42:51,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:42:51,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:42:51,250 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:42:51,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 12:42:51,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:51,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 2851 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-16 12:42:51,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:42:52,168 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 13 treesize of output 9 [2022-11-16 12:42:52,723 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-16 12:42:52,723 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:42:52,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039650073] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:42:52,723 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:42:52,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [16] total 27 [2022-11-16 12:42:52,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298016830] [2022-11-16 12:42:52,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:42:52,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-16 12:42:52,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:42:52,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-16 12:42:52,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=636, Unknown=0, NotChecked=0, Total=702 [2022-11-16 12:42:52,726 INFO L87 Difference]: Start difference. First operand 152 states and 206 transitions. Second operand has 13 states, 12 states have (on average 5.416666666666667) internal successors, (65), 10 states have internal predecessors, (65), 5 states have call successors, (20), 3 states have call predecessors, (20), 5 states have return successors, (19), 6 states have call predecessors, (19), 5 states have call successors, (19) [2022-11-16 12:42:52,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:42:52,950 INFO L93 Difference]: Finished difference Result 320 states and 429 transitions. [2022-11-16 12:42:52,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-16 12:42:52,951 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 5.416666666666667) internal successors, (65), 10 states have internal predecessors, (65), 5 states have call successors, (20), 3 states have call predecessors, (20), 5 states have return successors, (19), 6 states have call predecessors, (19), 5 states have call successors, (19) Word has length 141 [2022-11-16 12:42:52,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:42:52,953 INFO L225 Difference]: With dead ends: 320 [2022-11-16 12:42:52,953 INFO L226 Difference]: Without dead ends: 171 [2022-11-16 12:42:52,954 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=70, Invalid=686, Unknown=0, NotChecked=0, Total=756 [2022-11-16 12:42:52,955 INFO L413 NwaCegarLoop]: 177 mSDtfsCounter, 18 mSDsluCounter, 1427 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 1604 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 104 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:42:52,955 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 1604 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 65 Invalid, 0 Unknown, 104 Unchecked, 0.2s Time] [2022-11-16 12:42:52,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-11-16 12:42:52,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2022-11-16 12:42:52,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 112 states have (on average 1.2142857142857142) internal successors, (136), 114 states have internal predecessors, (136), 43 states have call successors, (43), 14 states have call predecessors, (43), 15 states have return successors, (50), 42 states have call predecessors, (50), 42 states have call successors, (50) [2022-11-16 12:42:52,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 229 transitions. [2022-11-16 12:42:52,971 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 229 transitions. Word has length 141 [2022-11-16 12:42:52,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:42:52,971 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 229 transitions. [2022-11-16 12:42:52,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 5.416666666666667) internal successors, (65), 10 states have internal predecessors, (65), 5 states have call successors, (20), 3 states have call predecessors, (20), 5 states have return successors, (19), 6 states have call predecessors, (19), 5 states have call successors, (19) [2022-11-16 12:42:52,972 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 229 transitions. [2022-11-16 12:42:52,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-11-16 12:42:52,974 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:42:52,974 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:42:52,989 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 12:42:53,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-16 12:42:53,185 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:42:53,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:42:53,185 INFO L85 PathProgramCache]: Analyzing trace with hash -1067385632, now seen corresponding path program 1 times [2022-11-16 12:42:53,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:42:53,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913625425] [2022-11-16 12:42:53,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:42:53,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:42:53,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:53,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:42:53,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:53,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-16 12:42:53,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:53,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 12:42:53,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:53,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:42:53,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:53,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:42:53,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:53,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:42:53,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:53,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-16 12:42:53,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:53,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-16 12:42:53,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:53,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-16 12:42:53,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:53,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-11-16 12:42:53,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:53,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-11-16 12:42:53,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:53,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-11-16 12:42:53,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:53,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-11-16 12:42:53,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:53,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-11-16 12:42:53,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:53,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-11-16 12:42:53,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:53,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-11-16 12:42:53,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:53,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:42:53,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:53,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-16 12:42:53,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:53,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-11-16 12:42:53,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:53,788 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2022-11-16 12:42:53,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:42:53,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913625425] [2022-11-16 12:42:53,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913625425] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:42:53,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231226152] [2022-11-16 12:42:53,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:42:53,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:42:53,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:42:53,795 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:42:53,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 12:42:54,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:54,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 2846 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 12:42:54,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:42:54,498 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2022-11-16 12:42:54,499 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:42:54,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231226152] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:42:54,499 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:42:54,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 7 [2022-11-16 12:42:54,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131394870] [2022-11-16 12:42:54,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:42:54,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:42:54,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:42:54,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:42:54,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:42:54,501 INFO L87 Difference]: Start difference. First operand 171 states and 229 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-16 12:42:54,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:42:54,543 INFO L93 Difference]: Finished difference Result 329 states and 448 transitions. [2022-11-16 12:42:54,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:42:54,544 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 141 [2022-11-16 12:42:54,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:42:54,548 INFO L225 Difference]: With dead ends: 329 [2022-11-16 12:42:54,548 INFO L226 Difference]: Without dead ends: 180 [2022-11-16 12:42:54,549 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:42:54,550 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 20 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 541 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:42:54,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 541 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:42:54,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-11-16 12:42:54,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 163. [2022-11-16 12:42:54,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 105 states have (on average 1.2095238095238094) internal successors, (127), 106 states have internal predecessors, (127), 43 states have call successors, (43), 14 states have call predecessors, (43), 14 states have return successors, (49), 42 states have call predecessors, (49), 42 states have call successors, (49) [2022-11-16 12:42:54,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 219 transitions. [2022-11-16 12:42:54,574 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 219 transitions. Word has length 141 [2022-11-16 12:42:54,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:42:54,576 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 219 transitions. [2022-11-16 12:42:54,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-16 12:42:54,576 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 219 transitions. [2022-11-16 12:42:54,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-11-16 12:42:54,578 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:42:54,579 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:42:54,598 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-16 12:42:54,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:42:54,791 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:42:54,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:42:54,791 INFO L85 PathProgramCache]: Analyzing trace with hash -707487644, now seen corresponding path program 2 times [2022-11-16 12:42:54,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:42:54,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086717968] [2022-11-16 12:42:54,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:42:54,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:42:54,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:55,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:42:55,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:55,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-16 12:42:55,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:55,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 12:42:55,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:55,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:42:55,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:55,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:42:55,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:55,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:42:55,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:55,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-16 12:42:55,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:56,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-11-16 12:42:56,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:56,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-11-16 12:42:56,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:56,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-11-16 12:42:56,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:56,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-11-16 12:42:56,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:56,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-11-16 12:42:56,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:56,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-11-16 12:42:56,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:56,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-11-16 12:42:56,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:56,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-11-16 12:42:56,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:56,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-11-16 12:42:56,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:56,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:42:56,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:56,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-16 12:42:56,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:56,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2022-11-16 12:42:56,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:56,274 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2022-11-16 12:42:56,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:42:56,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086717968] [2022-11-16 12:42:56,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086717968] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:42:56,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652207558] [2022-11-16 12:42:56,275 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:42:56,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:42:56,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:42:56,279 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:42:56,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 12:42:57,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:42:57,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:42:57,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 2858 conjuncts, 65 conjunts are in the unsatisfiable core [2022-11-16 12:42:57,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:42:57,921 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 10 treesize of output 8 [2022-11-16 12:42:58,069 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 13 treesize of output 9 [2022-11-16 12:42:58,528 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 38 treesize of output 38 [2022-11-16 12:42:58,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-16 12:43:00,933 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_byte_buf_eq_ignore_case_~b#1.base_BEFORE_CALL_4| Int) (|ULTIMATE.start_aws_byte_buf_eq_ignore_case_harness_~#lhs~0#1.base| Int)) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |ULTIMATE.start_aws_byte_buf_eq_ignore_case_harness_~#lhs~0#1.base|) 8))) (and (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_buf_eq_ignore_case_~b#1.base_BEFORE_CALL_4|) 8) .cse0) (not (= .cse0 0)) (not (= |v_ULTIMATE.start_aws_byte_buf_eq_ignore_case_~b#1.base_BEFORE_CALL_4| |ULTIMATE.start_aws_byte_buf_eq_ignore_case_harness_~#lhs~0#1.base|))))) is different from true [2022-11-16 12:43:03,146 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_byte_buf_eq_ignore_case_~b#1.base_BEFORE_CALL_5| Int) (|ULTIMATE.start_aws_byte_buf_eq_ignore_case_harness_~#lhs~0#1.base| Int)) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |ULTIMATE.start_aws_byte_buf_eq_ignore_case_harness_~#lhs~0#1.base|) 8))) (and (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_buf_eq_ignore_case_~b#1.base_BEFORE_CALL_5|) 8) .cse0) (not (= |v_ULTIMATE.start_aws_byte_buf_eq_ignore_case_~b#1.base_BEFORE_CALL_5| |ULTIMATE.start_aws_byte_buf_eq_ignore_case_harness_~#lhs~0#1.base|)) (not (= .cse0 0))))) is different from true [2022-11-16 12:43:05,330 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_byte_buf_eq_ignore_case_~b#1.base_BEFORE_CALL_6| Int) (|ULTIMATE.start_aws_byte_buf_eq_ignore_case_harness_~#lhs~0#1.base| Int)) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |ULTIMATE.start_aws_byte_buf_eq_ignore_case_harness_~#lhs~0#1.base|) 8))) (and (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_buf_eq_ignore_case_~b#1.base_BEFORE_CALL_6|) 8) .cse0) (not (= |v_ULTIMATE.start_aws_byte_buf_eq_ignore_case_~b#1.base_BEFORE_CALL_6| |ULTIMATE.start_aws_byte_buf_eq_ignore_case_harness_~#lhs~0#1.base|)) (not (= .cse0 0))))) is different from true [2022-11-16 12:43:13,910 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 114 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 27 not checked. [2022-11-16 12:43:13,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:43:14,804 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 32 treesize of output 26 [2022-11-16 12:43:14,875 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2022-11-16 12:43:14,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652207558] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:43:14,875 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:43:14,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 21, 14] total 39 [2022-11-16 12:43:14,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139068048] [2022-11-16 12:43:14,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:43:14,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-16 12:43:14,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:43:14,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-16 12:43:14,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1152, Unknown=4, NotChecked=210, Total=1482 [2022-11-16 12:43:14,879 INFO L87 Difference]: Start difference. First operand 163 states and 219 transitions. Second operand has 39 states, 37 states have (on average 4.27027027027027) internal successors, (158), 33 states have internal predecessors, (158), 12 states have call successors, (47), 11 states have call predecessors, (47), 13 states have return successors, (46), 12 states have call predecessors, (46), 12 states have call successors, (46) [2022-11-16 12:44:27,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:44:27,073 INFO L93 Difference]: Finished difference Result 424 states and 584 transitions. [2022-11-16 12:44:27,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-16 12:44:27,074 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 37 states have (on average 4.27027027027027) internal successors, (158), 33 states have internal predecessors, (158), 12 states have call successors, (47), 11 states have call predecessors, (47), 13 states have return successors, (46), 12 states have call predecessors, (46), 12 states have call successors, (46) Word has length 145 [2022-11-16 12:44:27,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:44:27,077 INFO L225 Difference]: With dead ends: 424 [2022-11-16 12:44:27,077 INFO L226 Difference]: Without dead ends: 275 [2022-11-16 12:44:27,080 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 293 SyntacticMatches, 11 SemanticMatches, 66 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 923 ImplicationChecksByTransitivity, 84.5s TimeCoverageRelationStatistics Valid=383, Invalid=3768, Unknown=21, NotChecked=384, Total=4556 [2022-11-16 12:44:27,081 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 244 mSDsluCounter, 1745 mSDsCounter, 0 mSdLazyCounter, 3242 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 1865 SdHoareTripleChecker+Invalid, 4810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 3242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1403 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:44:27,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 1865 Invalid, 4810 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [165 Valid, 3242 Invalid, 0 Unknown, 1403 Unchecked, 3.2s Time] [2022-11-16 12:44:27,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2022-11-16 12:44:27,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 248. [2022-11-16 12:44:27,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 168 states have (on average 1.2023809523809523) internal successors, (202), 173 states have internal predecessors, (202), 56 states have call successors, (56), 20 states have call predecessors, (56), 23 states have return successors, (84), 54 states have call predecessors, (84), 55 states have call successors, (84) [2022-11-16 12:44:27,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 342 transitions. [2022-11-16 12:44:27,114 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 342 transitions. Word has length 145 [2022-11-16 12:44:27,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:44:27,115 INFO L495 AbstractCegarLoop]: Abstraction has 248 states and 342 transitions. [2022-11-16 12:44:27,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 37 states have (on average 4.27027027027027) internal successors, (158), 33 states have internal predecessors, (158), 12 states have call successors, (47), 11 states have call predecessors, (47), 13 states have return successors, (46), 12 states have call predecessors, (46), 12 states have call successors, (46) [2022-11-16 12:44:27,116 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 342 transitions. [2022-11-16 12:44:27,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-11-16 12:44:27,119 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:44:27,119 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:44:27,139 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-16 12:44:27,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:44:27,333 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:44:27,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:44:27,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1601031443, now seen corresponding path program 1 times [2022-11-16 12:44:27,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:44:27,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727806352] [2022-11-16 12:44:27,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:44:27,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:44:27,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:27,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:44:27,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:27,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-16 12:44:27,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:27,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 12:44:27,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:27,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:44:27,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:27,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:44:27,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:27,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:44:27,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:27,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-16 12:44:27,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:27,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-16 12:44:27,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:27,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-11-16 12:44:27,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:27,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-11-16 12:44:27,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:27,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-11-16 12:44:27,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:27,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 12:44:27,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:27,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-11-16 12:44:27,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:27,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-11-16 12:44:27,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:27,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-11-16 12:44:27,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:27,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-11-16 12:44:27,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:28,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-11-16 12:44:28,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:28,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:44:28,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:28,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-16 12:44:28,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:28,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-11-16 12:44:28,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:28,052 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2022-11-16 12:44:28,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:44:28,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727806352] [2022-11-16 12:44:28,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727806352] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:44:28,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864495440] [2022-11-16 12:44:28,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:44:28,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:44:28,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:44:28,056 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:44:28,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 12:44:28,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:28,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 2908 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 12:44:28,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:44:28,935 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-11-16 12:44:28,935 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:44:28,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864495440] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:44:28,936 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:44:28,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 7 [2022-11-16 12:44:28,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446208179] [2022-11-16 12:44:28,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:44:28,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:44:28,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:44:28,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:44:28,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:44:28,938 INFO L87 Difference]: Start difference. First operand 248 states and 342 transitions. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-16 12:44:28,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:44:28,995 INFO L93 Difference]: Finished difference Result 492 states and 690 transitions. [2022-11-16 12:44:28,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:44:28,996 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 154 [2022-11-16 12:44:28,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:44:28,998 INFO L225 Difference]: With dead ends: 492 [2022-11-16 12:44:28,998 INFO L226 Difference]: Without dead ends: 256 [2022-11-16 12:44:29,000 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:44:29,001 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 9 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 534 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:44:29,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 534 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:44:29,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2022-11-16 12:44:29,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 250. [2022-11-16 12:44:29,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 170 states have (on average 1.188235294117647) internal successors, (202), 175 states have internal predecessors, (202), 56 states have call successors, (56), 20 states have call predecessors, (56), 23 states have return successors, (84), 54 states have call predecessors, (84), 55 states have call successors, (84) [2022-11-16 12:44:29,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 342 transitions. [2022-11-16 12:44:29,042 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 342 transitions. Word has length 154 [2022-11-16 12:44:29,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:44:29,042 INFO L495 AbstractCegarLoop]: Abstraction has 250 states and 342 transitions. [2022-11-16 12:44:29,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-16 12:44:29,043 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 342 transitions. [2022-11-16 12:44:29,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-11-16 12:44:29,046 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:44:29,047 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:44:29,070 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-16 12:44:29,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-16 12:44:29,259 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:44:29,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:44:29,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1885823307, now seen corresponding path program 1 times [2022-11-16 12:44:29,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:44:29,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785808052] [2022-11-16 12:44:29,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:44:29,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:44:29,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:29,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:44:29,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:29,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-16 12:44:29,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:29,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 12:44:29,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:29,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:44:29,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:29,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:44:29,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:29,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:44:29,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:29,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-16 12:44:29,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:29,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-16 12:44:29,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:29,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-11-16 12:44:29,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:29,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-11-16 12:44:29,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:29,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-11-16 12:44:29,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:29,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-11-16 12:44:29,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:29,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-11-16 12:44:29,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:29,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-11-16 12:44:29,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:29,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-11-16 12:44:29,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:29,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-11-16 12:44:29,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:29,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:44:29,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:29,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-16 12:44:29,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:29,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2022-11-16 12:44:29,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:29,882 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2022-11-16 12:44:29,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:44:29,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785808052] [2022-11-16 12:44:29,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785808052] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:44:29,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777002665] [2022-11-16 12:44:29,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:44:29,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:44:29,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:44:29,885 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:44:29,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 12:44:30,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:30,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 2869 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 12:44:30,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:44:30,752 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-11-16 12:44:30,752 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:44:30,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777002665] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:44:30,753 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:44:30,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 7 [2022-11-16 12:44:30,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452707060] [2022-11-16 12:44:30,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:44:30,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:44:30,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:44:30,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:44:30,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:44:30,756 INFO L87 Difference]: Start difference. First operand 250 states and 342 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-16 12:44:30,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:44:30,814 INFO L93 Difference]: Finished difference Result 504 states and 715 transitions. [2022-11-16 12:44:30,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:44:30,815 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 151 [2022-11-16 12:44:30,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:44:30,817 INFO L225 Difference]: With dead ends: 504 [2022-11-16 12:44:30,818 INFO L226 Difference]: Without dead ends: 266 [2022-11-16 12:44:30,820 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:44:30,821 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 34 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 532 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:44:30,821 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 532 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:44:30,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-11-16 12:44:30,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 237. [2022-11-16 12:44:30,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 157 states have (on average 1.1528662420382165) internal successors, (181), 163 states have internal predecessors, (181), 56 states have call successors, (56), 19 states have call predecessors, (56), 23 states have return successors, (83), 54 states have call predecessors, (83), 55 states have call successors, (83) [2022-11-16 12:44:30,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 320 transitions. [2022-11-16 12:44:30,854 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 320 transitions. Word has length 151 [2022-11-16 12:44:30,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:44:30,854 INFO L495 AbstractCegarLoop]: Abstraction has 237 states and 320 transitions. [2022-11-16 12:44:30,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-16 12:44:30,855 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 320 transitions. [2022-11-16 12:44:30,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-11-16 12:44:30,859 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:44:30,859 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:44:30,880 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-11-16 12:44:31,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:44:31,071 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:44:31,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:44:31,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1414683973, now seen corresponding path program 1 times [2022-11-16 12:44:31,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:44:31,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141093276] [2022-11-16 12:44:31,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:44:31,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:44:31,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:32,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:44:32,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:32,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-16 12:44:32,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:32,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 12:44:32,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:32,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:44:32,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:32,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:44:32,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:32,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:44:32,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:32,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-16 12:44:32,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:32,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-16 12:44:32,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:32,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-11-16 12:44:32,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:32,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-11-16 12:44:32,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:32,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-11-16 12:44:32,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:32,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-11-16 12:44:32,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:32,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-11-16 12:44:32,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:32,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-11-16 12:44:32,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:32,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-11-16 12:44:32,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:32,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-11-16 12:44:32,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:32,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:44:32,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:32,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-16 12:44:32,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:32,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-11-16 12:44:32,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:32,783 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 14 proven. 19 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2022-11-16 12:44:32,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:44:32,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141093276] [2022-11-16 12:44:32,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141093276] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:44:32,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521613825] [2022-11-16 12:44:32,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:44:32,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:44:32,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:44:32,786 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:44:32,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-16 12:44:33,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:33,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 2874 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 12:44:33,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:44:33,777 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 122 proven. 0 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-11-16 12:44:33,778 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:44:33,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521613825] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:44:33,778 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:44:33,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [12] total 13 [2022-11-16 12:44:33,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153546800] [2022-11-16 12:44:33,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:44:33,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 12:44:33,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:44:33,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 12:44:33,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-11-16 12:44:33,781 INFO L87 Difference]: Start difference. First operand 237 states and 320 transitions. Second operand has 9 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 3 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-11-16 12:44:34,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:44:34,032 INFO L93 Difference]: Finished difference Result 355 states and 487 transitions. [2022-11-16 12:44:34,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:44:34,033 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 3 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 155 [2022-11-16 12:44:34,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:44:34,036 INFO L225 Difference]: With dead ends: 355 [2022-11-16 12:44:34,036 INFO L226 Difference]: Without dead ends: 237 [2022-11-16 12:44:34,037 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 189 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-11-16 12:44:34,038 INFO L413 NwaCegarLoop]: 177 mSDtfsCounter, 13 mSDsluCounter, 1181 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 1358 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:44:34,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 1358 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 12:44:34,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-11-16 12:44:34,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 237. [2022-11-16 12:44:34,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 157 states have (on average 1.1528662420382165) internal successors, (181), 163 states have internal predecessors, (181), 56 states have call successors, (56), 19 states have call predecessors, (56), 23 states have return successors, (81), 54 states have call predecessors, (81), 55 states have call successors, (81) [2022-11-16 12:44:34,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 318 transitions. [2022-11-16 12:44:34,067 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 318 transitions. Word has length 155 [2022-11-16 12:44:34,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:44:34,067 INFO L495 AbstractCegarLoop]: Abstraction has 237 states and 318 transitions. [2022-11-16 12:44:34,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 3 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-11-16 12:44:34,068 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 318 transitions. [2022-11-16 12:44:34,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-11-16 12:44:34,072 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:44:34,072 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:44:34,090 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-16 12:44:34,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-16 12:44:34,284 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:44:34,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:44:34,285 INFO L85 PathProgramCache]: Analyzing trace with hash -1208327961, now seen corresponding path program 1 times [2022-11-16 12:44:34,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:44:34,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971541417] [2022-11-16 12:44:34,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:44:34,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:44:34,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:37,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:44:37,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:37,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-16 12:44:37,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:37,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 12:44:37,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:37,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:44:37,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:37,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:44:37,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:37,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:44:37,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:37,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-16 12:44:37,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:37,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-16 12:44:37,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:37,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-11-16 12:44:37,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:37,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-11-16 12:44:37,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:37,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-11-16 12:44:37,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:37,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 12:44:37,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:37,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-11-16 12:44:37,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:37,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-11-16 12:44:37,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:37,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-11-16 12:44:37,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:37,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-11-16 12:44:37,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:37,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-11-16 12:44:37,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:38,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:44:38,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:38,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-16 12:44:38,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:38,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-11-16 12:44:38,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:38,160 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 20 proven. 20 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2022-11-16 12:44:38,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:44:38,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971541417] [2022-11-16 12:44:38,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971541417] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:44:38,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219923062] [2022-11-16 12:44:38,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:44:38,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:44:38,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:44:38,163 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:44:38,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-16 12:44:39,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:39,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 2905 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-16 12:44:39,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:44:39,723 INFO L321 Elim1Store]: treesize reduction 132, result has 21.0 percent of original size [2022-11-16 12:44:39,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 80 [2022-11-16 12:44:40,021 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-16 12:44:40,022 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 53 treesize of output 33 [2022-11-16 12:44:40,201 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 112 proven. 8 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-11-16 12:44:40,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:44:40,910 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 29 treesize of output 17 [2022-11-16 12:44:41,116 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-11-16 12:44:41,117 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 29 treesize of output 24 [2022-11-16 12:44:41,206 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2022-11-16 12:44:41,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219923062] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:44:41,206 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:44:41,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 12] total 29 [2022-11-16 12:44:41,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971277439] [2022-11-16 12:44:41,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:44:41,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-16 12:44:41,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:44:41,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-16 12:44:41,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=735, Unknown=0, NotChecked=0, Total=812 [2022-11-16 12:44:41,210 INFO L87 Difference]: Start difference. First operand 237 states and 318 transitions. Second operand has 29 states, 27 states have (on average 5.222222222222222) internal successors, (141), 25 states have internal predecessors, (141), 13 states have call successors, (50), 8 states have call predecessors, (50), 8 states have return successors, (48), 11 states have call predecessors, (48), 13 states have call successors, (48) [2022-11-16 12:44:48,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:44:48,826 INFO L93 Difference]: Finished difference Result 540 states and 840 transitions. [2022-11-16 12:44:48,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-16 12:44:48,827 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 5.222222222222222) internal successors, (141), 25 states have internal predecessors, (141), 13 states have call successors, (50), 8 states have call predecessors, (50), 8 states have return successors, (48), 11 states have call predecessors, (48), 13 states have call successors, (48) Word has length 154 [2022-11-16 12:44:48,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:44:48,831 INFO L225 Difference]: With dead ends: 540 [2022-11-16 12:44:48,831 INFO L226 Difference]: Without dead ends: 426 [2022-11-16 12:44:48,833 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 330 SyntacticMatches, 6 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=285, Invalid=2367, Unknown=0, NotChecked=0, Total=2652 [2022-11-16 12:44:48,842 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 319 mSDsluCounter, 823 mSDsCounter, 0 mSdLazyCounter, 3639 mSolverCounterSat, 324 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 378 SdHoareTripleChecker+Valid, 911 SdHoareTripleChecker+Invalid, 4715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 324 IncrementalHoareTripleChecker+Valid, 3639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 752 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2022-11-16 12:44:48,844 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [378 Valid, 911 Invalid, 4715 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [324 Valid, 3639 Invalid, 0 Unknown, 752 Unchecked, 5.8s Time] [2022-11-16 12:44:48,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2022-11-16 12:44:48,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 333. [2022-11-16 12:44:48,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 218 states have (on average 1.1376146788990826) internal successors, (248), 227 states have internal predecessors, (248), 85 states have call successors, (85), 22 states have call predecessors, (85), 29 states have return successors, (154), 83 states have call predecessors, (154), 84 states have call successors, (154) [2022-11-16 12:44:48,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 487 transitions. [2022-11-16 12:44:48,903 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 487 transitions. Word has length 154 [2022-11-16 12:44:48,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:44:48,903 INFO L495 AbstractCegarLoop]: Abstraction has 333 states and 487 transitions. [2022-11-16 12:44:48,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 5.222222222222222) internal successors, (141), 25 states have internal predecessors, (141), 13 states have call successors, (50), 8 states have call predecessors, (50), 8 states have return successors, (48), 11 states have call predecessors, (48), 13 states have call successors, (48) [2022-11-16 12:44:48,904 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 487 transitions. [2022-11-16 12:44:48,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-11-16 12:44:48,909 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:44:48,909 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:44:48,929 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-16 12:44:49,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-16 12:44:49,130 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:44:49,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:44:49,131 INFO L85 PathProgramCache]: Analyzing trace with hash -2098702409, now seen corresponding path program 1 times [2022-11-16 12:44:49,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:44:49,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93759124] [2022-11-16 12:44:49,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:44:49,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:44:49,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:50,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:44:50,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:50,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-16 12:44:50,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:50,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 12:44:50,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:50,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:44:50,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:50,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:44:50,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:50,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:44:50,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:50,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-16 12:44:50,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:50,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-16 12:44:50,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:50,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-11-16 12:44:50,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:50,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-11-16 12:44:50,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:50,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-11-16 12:44:50,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:50,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-11-16 12:44:50,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:50,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-11-16 12:44:50,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:50,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-11-16 12:44:50,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:50,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-11-16 12:44:50,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:50,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-11-16 12:44:50,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:50,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:44:50,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:50,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-16 12:44:50,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:50,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2022-11-16 12:44:50,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:50,685 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 21 proven. 11 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2022-11-16 12:44:50,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:44:50,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93759124] [2022-11-16 12:44:50,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93759124] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:44:50,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619384066] [2022-11-16 12:44:50,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:44:50,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:44:50,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:44:50,691 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:44:50,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-16 12:44:51,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:51,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 2862 conjuncts, 60 conjunts are in the unsatisfiable core [2022-11-16 12:44:51,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:44:51,684 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 12:44:52,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:44:52,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:44:52,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:44:52,278 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 12:44:52,278 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 47 [2022-11-16 12:44:53,573 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 122 proven. 22 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-16 12:44:53,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:44:54,975 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 10 proven. 52 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2022-11-16 12:44:54,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619384066] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:44:54,975 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:44:54,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17, 13] total 37 [2022-11-16 12:44:54,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982215216] [2022-11-16 12:44:54,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:44:54,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-16 12:44:54,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:44:54,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-16 12:44:54,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1223, Unknown=0, NotChecked=0, Total=1332 [2022-11-16 12:44:54,978 INFO L87 Difference]: Start difference. First operand 333 states and 487 transitions. Second operand has 37 states, 35 states have (on average 5.142857142857143) internal successors, (180), 33 states have internal predecessors, (180), 12 states have call successors, (48), 8 states have call predecessors, (48), 10 states have return successors, (46), 11 states have call predecessors, (46), 12 states have call successors, (46) [2022-11-16 12:45:09,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:45:09,566 INFO L93 Difference]: Finished difference Result 849 states and 1443 transitions. [2022-11-16 12:45:09,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-11-16 12:45:09,567 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 35 states have (on average 5.142857142857143) internal successors, (180), 33 states have internal predecessors, (180), 12 states have call successors, (48), 8 states have call predecessors, (48), 10 states have return successors, (46), 11 states have call predecessors, (46), 12 states have call successors, (46) Word has length 151 [2022-11-16 12:45:09,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:45:09,574 INFO L225 Difference]: With dead ends: 849 [2022-11-16 12:45:09,574 INFO L226 Difference]: Without dead ends: 613 [2022-11-16 12:45:09,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 415 GetRequests, 316 SyntacticMatches, 9 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2004 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=760, Invalid=7611, Unknown=1, NotChecked=0, Total=8372 [2022-11-16 12:45:09,580 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 285 mSDsluCounter, 2069 mSDsCounter, 0 mSdLazyCounter, 9043 mSolverCounterSat, 284 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 2261 SdHoareTripleChecker+Invalid, 11056 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 284 IncrementalHoareTripleChecker+Valid, 9043 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1729 IncrementalHoareTripleChecker+Unchecked, 10.9s IncrementalHoareTripleChecker+Time [2022-11-16 12:45:09,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [359 Valid, 2261 Invalid, 11056 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [284 Valid, 9043 Invalid, 0 Unknown, 1729 Unchecked, 10.9s Time] [2022-11-16 12:45:09,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2022-11-16 12:45:09,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 419. [2022-11-16 12:45:09,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 266 states have (on average 1.105263157894737) internal successors, (294), 276 states have internal predecessors, (294), 118 states have call successors, (118), 26 states have call predecessors, (118), 34 states have return successors, (226), 116 states have call predecessors, (226), 117 states have call successors, (226) [2022-11-16 12:45:09,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 638 transitions. [2022-11-16 12:45:09,666 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 638 transitions. Word has length 151 [2022-11-16 12:45:09,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:45:09,667 INFO L495 AbstractCegarLoop]: Abstraction has 419 states and 638 transitions. [2022-11-16 12:45:09,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 35 states have (on average 5.142857142857143) internal successors, (180), 33 states have internal predecessors, (180), 12 states have call successors, (48), 8 states have call predecessors, (48), 10 states have return successors, (46), 11 states have call predecessors, (46), 12 states have call successors, (46) [2022-11-16 12:45:09,668 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 638 transitions. [2022-11-16 12:45:09,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-11-16 12:45:09,673 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:45:09,673 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:45:09,691 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-16 12:45:09,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-16 12:45:09,886 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:45:09,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:45:09,887 INFO L85 PathProgramCache]: Analyzing trace with hash 126231492, now seen corresponding path program 1 times [2022-11-16 12:45:09,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:45:09,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502599218] [2022-11-16 12:45:09,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:45:09,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:45:10,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:45:13,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:45:13,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:45:13,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-16 12:45:13,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:45:13,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 12:45:13,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:45:13,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:45:13,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:45:13,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:45:13,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:45:13,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:45:13,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:45:13,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-16 12:45:13,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:45:14,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-16 12:45:14,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:45:14,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-11-16 12:45:14,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:45:14,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-11-16 12:45:14,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:45:14,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-11-16 12:45:14,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:45:14,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-11-16 12:45:14,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:45:14,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-11-16 12:45:14,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:45:14,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-11-16 12:45:14,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:45:14,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-11-16 12:45:14,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:45:14,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2022-11-16 12:45:14,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:45:14,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:45:14,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:45:14,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-16 12:45:14,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:45:14,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2022-11-16 12:45:14,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:45:14,606 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 2 proven. 56 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2022-11-16 12:45:14,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:45:14,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502599218] [2022-11-16 12:45:14,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502599218] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:45:14,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29507014] [2022-11-16 12:45:14,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:45:14,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:45:14,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:45:14,609 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:45:14,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-16 12:45:15,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:45:15,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 2879 conjuncts, 84 conjunts are in the unsatisfiable core [2022-11-16 12:45:15,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:45:15,809 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 13 treesize of output 9 [2022-11-16 12:45:17,230 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 32 [2022-11-16 12:45:17,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:45:17,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:45:17,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:45:17,265 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 12:45:17,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 48 [2022-11-16 12:45:17,274 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 22 treesize of output 14 [2022-11-16 12:45:17,538 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 12:45:17,538 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 29 treesize of output 13 [2022-11-16 12:45:17,880 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 12:45:17,890 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 102 proven. 4 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-11-16 12:45:17,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:45:19,091 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 35 treesize of output 27 [2022-11-16 12:45:19,532 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-11-16 12:45:19,532 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 19 treesize of output 18 [2022-11-16 12:45:19,893 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 32 treesize of output 26 [2022-11-16 12:45:20,194 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2022-11-16 12:45:20,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29507014] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:45:20,195 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:45:20,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 20, 18] total 52 [2022-11-16 12:45:20,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358061613] [2022-11-16 12:45:20,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:45:20,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-11-16 12:45:20,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:45:20,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-11-16 12:45:20,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=2446, Unknown=0, NotChecked=0, Total=2652 [2022-11-16 12:45:20,198 INFO L87 Difference]: Start difference. First operand 419 states and 638 transitions. Second operand has 52 states, 46 states have (on average 4.217391304347826) internal successors, (194), 43 states have internal predecessors, (194), 20 states have call successors, (50), 11 states have call predecessors, (50), 17 states have return successors, (49), 18 states have call predecessors, (49), 20 states have call successors, (49) [2022-11-16 12:45:32,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:45:32,100 INFO L93 Difference]: Finished difference Result 866 states and 1364 transitions. [2022-11-16 12:45:32,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-11-16 12:45:32,101 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 46 states have (on average 4.217391304347826) internal successors, (194), 43 states have internal predecessors, (194), 20 states have call successors, (50), 11 states have call predecessors, (50), 17 states have return successors, (49), 18 states have call predecessors, (49), 20 states have call successors, (49) Word has length 153 [2022-11-16 12:45:32,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:45:32,107 INFO L225 Difference]: With dead ends: 866 [2022-11-16 12:45:32,107 INFO L226 Difference]: Without dead ends: 621 [2022-11-16 12:45:32,118 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 327 SyntacticMatches, 3 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2978 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=828, Invalid=9474, Unknown=0, NotChecked=0, Total=10302 [2022-11-16 12:45:32,120 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 659 mSDsluCounter, 1347 mSDsCounter, 0 mSdLazyCounter, 6925 mSolverCounterSat, 508 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 682 SdHoareTripleChecker+Valid, 1466 SdHoareTripleChecker+Invalid, 8788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 508 IncrementalHoareTripleChecker+Valid, 6925 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1355 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:45:32,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [682 Valid, 1466 Invalid, 8788 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [508 Valid, 6925 Invalid, 0 Unknown, 1355 Unchecked, 8.3s Time] [2022-11-16 12:45:32,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2022-11-16 12:45:32,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 534. [2022-11-16 12:45:32,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 534 states, 337 states have (on average 1.1186943620178043) internal successors, (377), 350 states have internal predecessors, (377), 149 states have call successors, (149), 36 states have call predecessors, (149), 47 states have return successors, (282), 147 states have call predecessors, (282), 147 states have call successors, (282) [2022-11-16 12:45:32,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 808 transitions. [2022-11-16 12:45:32,232 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 808 transitions. Word has length 153 [2022-11-16 12:45:32,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:45:32,233 INFO L495 AbstractCegarLoop]: Abstraction has 534 states and 808 transitions. [2022-11-16 12:45:32,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 46 states have (on average 4.217391304347826) internal successors, (194), 43 states have internal predecessors, (194), 20 states have call successors, (50), 11 states have call predecessors, (50), 17 states have return successors, (49), 18 states have call predecessors, (49), 20 states have call successors, (49) [2022-11-16 12:45:32,233 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 808 transitions. [2022-11-16 12:45:32,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-11-16 12:45:32,238 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:45:32,239 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:45:32,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-16 12:45:32,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-16 12:45:32,451 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:45:32,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:45:32,452 INFO L85 PathProgramCache]: Analyzing trace with hash -536749390, now seen corresponding path program 1 times [2022-11-16 12:45:32,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:45:32,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869216368] [2022-11-16 12:45:32,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:45:32,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:45:32,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:45:38,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:45:38,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:45:38,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-16 12:45:38,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:45:38,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 12:45:38,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:45:38,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:45:38,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:45:38,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:45:38,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:45:38,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:45:38,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:45:38,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-16 12:45:38,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:45:38,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-16 12:45:38,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:45:38,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-11-16 12:45:38,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:45:38,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-11-16 12:45:39,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:45:39,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 12:45:39,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:45:39,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-11-16 12:45:39,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:45:39,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-11-16 12:45:39,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:45:40,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-11-16 12:45:40,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:45:40,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-11-16 12:45:40,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:45:40,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-11-16 12:45:40,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:45:40,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-11-16 12:45:40,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:45:40,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:45:40,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:45:40,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-16 12:45:40,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:45:40,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2022-11-16 12:45:40,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:45:40,595 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 10 proven. 23 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2022-11-16 12:45:40,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:45:40,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869216368] [2022-11-16 12:45:40,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869216368] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:45:40,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050991550] [2022-11-16 12:45:40,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:45:40,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:45:40,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:45:40,598 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:45:40,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-16 12:45:41,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:45:41,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 2919 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-16 12:45:41,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:45:41,476 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 10 treesize of output 8 [2022-11-16 12:45:42,363 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 25 treesize of output 25 [2022-11-16 12:45:42,476 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 26 treesize of output 14 [2022-11-16 12:45:42,705 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 122 proven. 4 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-11-16 12:45:42,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:45:43,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050991550] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:45:43,384 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:45:43,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 12] total 37 [2022-11-16 12:45:43,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900107860] [2022-11-16 12:45:43,385 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:45:43,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-16 12:45:43,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:45:43,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-16 12:45:43,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1449, Unknown=8, NotChecked=0, Total=1560 [2022-11-16 12:45:43,388 INFO L87 Difference]: Start difference. First operand 534 states and 808 transitions. Second operand has 37 states, 32 states have (on average 4.34375) internal successors, (139), 32 states have internal predecessors, (139), 15 states have call successors, (41), 6 states have call predecessors, (41), 10 states have return successors, (40), 13 states have call predecessors, (40), 15 states have call successors, (40) [2022-11-16 12:46:01,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:46:01,542 INFO L93 Difference]: Finished difference Result 1281 states and 2224 transitions. [2022-11-16 12:46:01,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-11-16 12:46:01,543 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 32 states have (on average 4.34375) internal successors, (139), 32 states have internal predecessors, (139), 15 states have call successors, (41), 6 states have call predecessors, (41), 10 states have return successors, (40), 13 states have call predecessors, (40), 15 states have call successors, (40) Word has length 160 [2022-11-16 12:46:01,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:46:01,552 INFO L225 Difference]: With dead ends: 1281 [2022-11-16 12:46:01,553 INFO L226 Difference]: Without dead ends: 967 [2022-11-16 12:46:01,558 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 283 SyntacticMatches, 6 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1649 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=744, Invalid=6904, Unknown=8, NotChecked=0, Total=7656 [2022-11-16 12:46:01,559 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 720 mSDsluCounter, 1111 mSDsCounter, 0 mSdLazyCounter, 8974 mSolverCounterSat, 1204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 729 SdHoareTripleChecker+Valid, 1194 SdHoareTripleChecker+Invalid, 10530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1204 IncrementalHoareTripleChecker+Valid, 8974 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 352 IncrementalHoareTripleChecker+Unchecked, 13.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:46:01,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [729 Valid, 1194 Invalid, 10530 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1204 Valid, 8974 Invalid, 0 Unknown, 352 Unchecked, 13.4s Time] [2022-11-16 12:46:01,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 967 states. [2022-11-16 12:46:01,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 967 to 708. [2022-11-16 12:46:01,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 708 states, 433 states have (on average 1.117782909930716) internal successors, (484), 444 states have internal predecessors, (484), 225 states have call successors, (225), 40 states have call predecessors, (225), 49 states have return successors, (438), 223 states have call predecessors, (438), 223 states have call successors, (438) [2022-11-16 12:46:01,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 708 states to 708 states and 1147 transitions. [2022-11-16 12:46:01,734 INFO L78 Accepts]: Start accepts. Automaton has 708 states and 1147 transitions. Word has length 160 [2022-11-16 12:46:01,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:46:01,735 INFO L495 AbstractCegarLoop]: Abstraction has 708 states and 1147 transitions. [2022-11-16 12:46:01,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 32 states have (on average 4.34375) internal successors, (139), 32 states have internal predecessors, (139), 15 states have call successors, (41), 6 states have call predecessors, (41), 10 states have return successors, (40), 13 states have call predecessors, (40), 15 states have call successors, (40) [2022-11-16 12:46:01,735 INFO L276 IsEmpty]: Start isEmpty. Operand 708 states and 1147 transitions. [2022-11-16 12:46:01,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-11-16 12:46:01,740 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:46:01,740 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:46:01,765 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-16 12:46:01,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:46:01,961 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:46:01,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:46:01,961 INFO L85 PathProgramCache]: Analyzing trace with hash -398483974, now seen corresponding path program 1 times [2022-11-16 12:46:01,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:46:01,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529105207] [2022-11-16 12:46:01,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:46:01,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:46:02,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:46:06,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:46:06,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:46:06,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-16 12:46:06,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:46:06,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 12:46:06,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:46:06,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:46:06,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:46:06,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:46:06,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:46:06,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:46:06,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:46:06,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-16 12:46:06,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:46:06,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-16 12:46:06,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:46:06,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-11-16 12:46:06,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:46:06,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-11-16 12:46:06,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:46:06,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-11-16 12:46:06,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:46:06,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 12:46:06,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:46:06,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-11-16 12:46:06,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:46:06,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-11-16 12:46:06,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:46:06,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-11-16 12:46:06,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:46:06,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-11-16 12:46:06,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:46:06,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-11-16 12:46:06,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:46:06,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:46:06,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:46:06,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-16 12:46:06,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:46:06,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2022-11-16 12:46:06,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:46:06,896 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2022-11-16 12:46:06,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:46:06,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529105207] [2022-11-16 12:46:06,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529105207] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:46:06,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419874549] [2022-11-16 12:46:06,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:46:06,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:46:06,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:46:06,903 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:46:06,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-16 12:46:07,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:46:07,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 2919 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-16 12:46:07,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:46:07,677 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 10 treesize of output 8 [2022-11-16 12:46:07,907 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 13 treesize of output 9 [2022-11-16 12:46:08,571 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 30 treesize of output 42 [2022-11-16 12:46:08,594 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 17 treesize of output 19 [2022-11-16 12:46:08,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-11-16 12:46:09,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 12 [2022-11-16 12:46:09,180 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 118 proven. 16 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-11-16 12:46:09,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:46:10,490 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 1767 treesize of output 1731 [2022-11-16 12:46:12,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419874549] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:46:12,613 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:46:12,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 35 [2022-11-16 12:46:12,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754034297] [2022-11-16 12:46:12,614 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:46:12,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-16 12:46:12,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:46:12,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-16 12:46:12,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1671, Unknown=0, NotChecked=0, Total=1806 [2022-11-16 12:46:12,616 INFO L87 Difference]: Start difference. First operand 708 states and 1147 transitions. Second operand has 35 states, 31 states have (on average 5.0) internal successors, (155), 28 states have internal predecessors, (155), 14 states have call successors, (41), 8 states have call predecessors, (41), 11 states have return successors, (40), 13 states have call predecessors, (40), 14 states have call successors, (40) [2022-11-16 12:46:17,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:46:17,947 INFO L93 Difference]: Finished difference Result 979 states and 1530 transitions. [2022-11-16 12:46:17,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-16 12:46:17,948 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 31 states have (on average 5.0) internal successors, (155), 28 states have internal predecessors, (155), 14 states have call successors, (41), 8 states have call predecessors, (41), 11 states have return successors, (40), 13 states have call predecessors, (40), 14 states have call successors, (40) Word has length 160 [2022-11-16 12:46:17,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:46:17,955 INFO L225 Difference]: With dead ends: 979 [2022-11-16 12:46:17,955 INFO L226 Difference]: Without dead ends: 714 [2022-11-16 12:46:17,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 275 SyntacticMatches, 7 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1092 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=449, Invalid=4663, Unknown=0, NotChecked=0, Total=5112 [2022-11-16 12:46:17,959 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 249 mSDsluCounter, 1038 mSDsCounter, 0 mSdLazyCounter, 3570 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 1118 SdHoareTripleChecker+Invalid, 4294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 3570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 577 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:46:17,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [265 Valid, 1118 Invalid, 4294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 3570 Invalid, 0 Unknown, 577 Unchecked, 3.4s Time] [2022-11-16 12:46:17,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2022-11-16 12:46:18,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 708. [2022-11-16 12:46:18,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 708 states, 433 states have (on average 1.1131639722863742) internal successors, (482), 445 states have internal predecessors, (482), 224 states have call successors, (224), 40 states have call predecessors, (224), 50 states have return successors, (436), 222 states have call predecessors, (436), 222 states have call successors, (436) [2022-11-16 12:46:18,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 708 states to 708 states and 1142 transitions. [2022-11-16 12:46:18,151 INFO L78 Accepts]: Start accepts. Automaton has 708 states and 1142 transitions. Word has length 160 [2022-11-16 12:46:18,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:46:18,152 INFO L495 AbstractCegarLoop]: Abstraction has 708 states and 1142 transitions. [2022-11-16 12:46:18,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 31 states have (on average 5.0) internal successors, (155), 28 states have internal predecessors, (155), 14 states have call successors, (41), 8 states have call predecessors, (41), 11 states have return successors, (40), 13 states have call predecessors, (40), 14 states have call successors, (40) [2022-11-16 12:46:18,152 INFO L276 IsEmpty]: Start isEmpty. Operand 708 states and 1142 transitions. [2022-11-16 12:46:18,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-11-16 12:46:18,156 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:46:18,157 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:46:18,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-16 12:46:18,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-16 12:46:18,368 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:46:18,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:46:18,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1638254898, now seen corresponding path program 2 times [2022-11-16 12:46:18,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:46:18,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24117546] [2022-11-16 12:46:18,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:46:18,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:46:18,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:46:23,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:46:23,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:46:23,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-16 12:46:23,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:46:23,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 12:46:23,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:46:23,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:46:23,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:46:23,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:46:23,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:46:23,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:46:23,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:46:23,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-16 12:46:23,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:46:23,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-16 12:46:23,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:46:23,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-11-16 12:46:23,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:46:24,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-11-16 12:46:24,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:46:24,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 12:46:24,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:46:24,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-11-16 12:46:24,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:46:24,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-11-16 12:46:24,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:46:24,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-11-16 12:46:24,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:46:24,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-11-16 12:46:24,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:46:24,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-11-16 12:46:24,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:46:24,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-11-16 12:46:24,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:46:24,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:46:24,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:46:24,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-16 12:46:24,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:46:24,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2022-11-16 12:46:24,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:46:24,753 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2022-11-16 12:46:24,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:46:24,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24117546] [2022-11-16 12:46:24,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24117546] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:46:24,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378007351] [2022-11-16 12:46:24,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:46:24,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:46:24,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:46:24,763 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:46:24,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-16 12:46:25,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:46:25,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:46:25,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 2919 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-16 12:46:25,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:46:37,548 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 119 proven. 23 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-16 12:46:37,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:46:38,026 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 24 treesize of output 12 [2022-11-16 12:46:38,178 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-11-16 12:46:38,179 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-11-16 12:46:38,231 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 40 proven. 24 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-11-16 12:46:38,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378007351] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:46:38,232 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:46:38,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 12, 9] total 37 [2022-11-16 12:46:38,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832683300] [2022-11-16 12:46:38,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:46:38,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-16 12:46:38,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:46:38,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-16 12:46:38,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1229, Unknown=1, NotChecked=0, Total=1332 [2022-11-16 12:46:38,235 INFO L87 Difference]: Start difference. First operand 708 states and 1142 transitions. Second operand has 37 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 33 states have internal predecessors, (172), 13 states have call successors, (55), 6 states have call predecessors, (55), 10 states have return successors, (54), 12 states have call predecessors, (54), 13 states have call successors, (54) [2022-11-16 12:46:55,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:46:55,411 INFO L93 Difference]: Finished difference Result 1549 states and 2794 transitions. [2022-11-16 12:46:55,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-16 12:46:55,412 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 33 states have internal predecessors, (172), 13 states have call successors, (55), 6 states have call predecessors, (55), 10 states have return successors, (54), 12 states have call predecessors, (54), 13 states have call successors, (54) Word has length 160 [2022-11-16 12:46:55,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:46:55,423 INFO L225 Difference]: With dead ends: 1549 [2022-11-16 12:46:55,424 INFO L226 Difference]: Without dead ends: 1064 [2022-11-16 12:46:55,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 346 SyntacticMatches, 9 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1065 ImplicationChecksByTransitivity, 20.8s TimeCoverageRelationStatistics Valid=534, Invalid=4571, Unknown=7, NotChecked=0, Total=5112 [2022-11-16 12:46:55,431 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 412 mSDsluCounter, 1540 mSDsCounter, 0 mSdLazyCounter, 6411 mSolverCounterSat, 392 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 436 SdHoareTripleChecker+Valid, 1677 SdHoareTripleChecker+Invalid, 7553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 392 IncrementalHoareTripleChecker+Valid, 6411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 750 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:46:55,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [436 Valid, 1677 Invalid, 7553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [392 Valid, 6411 Invalid, 0 Unknown, 750 Unchecked, 8.1s Time] [2022-11-16 12:46:55,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1064 states. [2022-11-16 12:46:55,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1064 to 783. [2022-11-16 12:46:55,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 783 states, 492 states have (on average 1.1056910569105691) internal successors, (544), 504 states have internal predecessors, (544), 228 states have call successors, (228), 52 states have call predecessors, (228), 62 states have return successors, (445), 226 states have call predecessors, (445), 226 states have call successors, (445) [2022-11-16 12:46:55,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 783 states to 783 states and 1217 transitions. [2022-11-16 12:46:55,637 INFO L78 Accepts]: Start accepts. Automaton has 783 states and 1217 transitions. Word has length 160 [2022-11-16 12:46:55,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:46:55,637 INFO L495 AbstractCegarLoop]: Abstraction has 783 states and 1217 transitions. [2022-11-16 12:46:55,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 33 states have internal predecessors, (172), 13 states have call successors, (55), 6 states have call predecessors, (55), 10 states have return successors, (54), 12 states have call predecessors, (54), 13 states have call successors, (54) [2022-11-16 12:46:55,638 INFO L276 IsEmpty]: Start isEmpty. Operand 783 states and 1217 transitions. [2022-11-16 12:46:55,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-11-16 12:46:55,642 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:46:55,642 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:46:55,659 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-16 12:46:55,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-16 12:46:55,854 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:46:55,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:46:55,854 INFO L85 PathProgramCache]: Analyzing trace with hash 706910291, now seen corresponding path program 1 times [2022-11-16 12:46:55,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:46:55,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951274671] [2022-11-16 12:46:55,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:46:55,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:46:56,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:46:58,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:46:58,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:46:58,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-16 12:46:58,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:46:58,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 12:46:58,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:46:59,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:46:59,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:46:59,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:46:59,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:46:59,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:46:59,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:46:59,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-16 12:46:59,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:46:59,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-16 12:46:59,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:46:59,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-11-16 12:46:59,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:46:59,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-11-16 12:46:59,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:46:59,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-11-16 12:46:59,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:46:59,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-11-16 12:46:59,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:46:59,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-11-16 12:46:59,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:46:59,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-11-16 12:46:59,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:46:59,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-11-16 12:46:59,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:46:59,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2022-11-16 12:46:59,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:46:59,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:46:59,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:46:59,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-16 12:46:59,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:46:59,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-11-16 12:46:59,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:46:59,565 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2022-11-16 12:46:59,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:46:59,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951274671] [2022-11-16 12:46:59,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951274671] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:46:59,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230305111] [2022-11-16 12:46:59,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:46:59,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:46:59,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:46:59,574 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:46:59,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-16 12:47:00,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:47:00,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 2881 conjuncts, 65 conjunts are in the unsatisfiable core [2022-11-16 12:47:00,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:47:00,902 INFO L321 Elim1Store]: treesize reduction 25, result has 26.5 percent of original size [2022-11-16 12:47:00,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 39 [2022-11-16 12:47:00,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 23 [2022-11-16 12:47:00,926 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 16 [2022-11-16 12:47:02,516 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 72 proven. 38 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-11-16 12:47:02,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:47:03,190 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:47:03,190 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 2 case distinctions, treesize of input 31 treesize of output 38 [2022-11-16 12:47:03,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230305111] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:47:03,336 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:47:03,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 15] total 33 [2022-11-16 12:47:03,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045122286] [2022-11-16 12:47:03,337 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:47:03,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-16 12:47:03,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:47:03,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-16 12:47:03,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1435, Unknown=2, NotChecked=0, Total=1560 [2022-11-16 12:47:03,339 INFO L87 Difference]: Start difference. First operand 783 states and 1217 transitions. Second operand has 33 states, 31 states have (on average 4.741935483870968) internal successors, (147), 28 states have internal predecessors, (147), 14 states have call successors, (38), 7 states have call predecessors, (38), 9 states have return successors, (37), 14 states have call predecessors, (37), 14 states have call successors, (37) [2022-11-16 12:47:08,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:47:08,621 INFO L93 Difference]: Finished difference Result 1040 states and 1530 transitions. [2022-11-16 12:47:08,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-16 12:47:08,622 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 4.741935483870968) internal successors, (147), 28 states have internal predecessors, (147), 14 states have call successors, (38), 7 states have call predecessors, (38), 9 states have return successors, (37), 14 states have call predecessors, (37), 14 states have call successors, (37) Word has length 155 [2022-11-16 12:47:08,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:47:08,629 INFO L225 Difference]: With dead ends: 1040 [2022-11-16 12:47:08,629 INFO L226 Difference]: Without dead ends: 842 [2022-11-16 12:47:08,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 260 SyntacticMatches, 14 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1216 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=546, Invalid=4564, Unknown=2, NotChecked=0, Total=5112 [2022-11-16 12:47:08,633 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 518 mSDsluCounter, 1575 mSDsCounter, 0 mSdLazyCounter, 3855 mSolverCounterSat, 411 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 527 SdHoareTripleChecker+Valid, 1706 SdHoareTripleChecker+Invalid, 4878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 411 IncrementalHoareTripleChecker+Valid, 3855 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 612 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:47:08,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [527 Valid, 1706 Invalid, 4878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [411 Valid, 3855 Invalid, 0 Unknown, 612 Unchecked, 3.3s Time] [2022-11-16 12:47:08,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2022-11-16 12:47:08,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 814. [2022-11-16 12:47:08,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 814 states, 525 states have (on average 1.1028571428571428) internal successors, (579), 536 states have internal predecessors, (579), 222 states have call successors, (222), 57 states have call predecessors, (222), 66 states have return successors, (431), 220 states have call predecessors, (431), 220 states have call successors, (431) [2022-11-16 12:47:08,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 1232 transitions. [2022-11-16 12:47:08,790 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 1232 transitions. Word has length 155 [2022-11-16 12:47:08,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:47:08,790 INFO L495 AbstractCegarLoop]: Abstraction has 814 states and 1232 transitions. [2022-11-16 12:47:08,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 4.741935483870968) internal successors, (147), 28 states have internal predecessors, (147), 14 states have call successors, (38), 7 states have call predecessors, (38), 9 states have return successors, (37), 14 states have call predecessors, (37), 14 states have call successors, (37) [2022-11-16 12:47:08,791 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 1232 transitions. [2022-11-16 12:47:08,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-11-16 12:47:08,795 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:47:08,795 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:47:08,807 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-16 12:47:09,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:47:09,005 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:47:09,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:47:09,006 INFO L85 PathProgramCache]: Analyzing trace with hash -427180276, now seen corresponding path program 1 times [2022-11-16 12:47:09,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:47:09,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88033515] [2022-11-16 12:47:09,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:47:09,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:47:09,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:47:13,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:47:13,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:47:13,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-16 12:47:13,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:47:13,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 12:47:13,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:47:13,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:47:13,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:47:14,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:47:14,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:47:14,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:47:14,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:47:14,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-16 12:47:14,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:47:14,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-16 12:47:14,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:47:14,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-11-16 12:47:14,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:47:14,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-11-16 12:47:14,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:47:14,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 12:47:14,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:47:14,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-11-16 12:47:14,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:47:14,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 12:47:14,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:47:14,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-11-16 12:47:14,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:47:14,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2022-11-16 12:47:14,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:47:14,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2022-11-16 12:47:14,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:47:14,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2022-11-16 12:47:14,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:47:14,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2022-11-16 12:47:14,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:47:14,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:47:14,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:47:14,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-16 12:47:14,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:47:14,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2022-11-16 12:47:14,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:47:14,862 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 26 proven. 32 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2022-11-16 12:47:14,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:47:14,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88033515] [2022-11-16 12:47:14,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88033515] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:47:14,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50450354] [2022-11-16 12:47:14,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:47:14,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:47:14,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:47:14,864 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:47:14,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-16 12:47:15,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:47:15,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 2969 conjuncts, 114 conjunts are in the unsatisfiable core [2022-11-16 12:47:15,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:47:15,651 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 10 treesize of output 8 [2022-11-16 12:47:15,800 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 13 treesize of output 9 [2022-11-16 12:47:16,777 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 19 treesize of output 21 [2022-11-16 12:47:16,782 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 16 treesize of output 18 [2022-11-16 12:47:17,124 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 11 treesize of output 7 [2022-11-16 12:47:17,128 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 12:47:17,144 WARN L855 $PredicateComparison]: unable to prove that (exists ((|save_byte_from_array_~storage#1.base| Int) (v_ArrVal_3134 (Array Int Int)) (v_ArrVal_3133 Int) (v_ArrVal_3130 Int)) (and (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |save_byte_from_array_~storage#1.base| v_ArrVal_3134)) (= (store |c_old(#memory_int)| |save_byte_from_array_~storage#1.base| (store (store (select |c_old(#memory_int)| |save_byte_from_array_~storage#1.base|) |c_save_byte_from_array_#in~storage#1.offset| v_ArrVal_3130) (+ |c_save_byte_from_array_#in~storage#1.offset| 8) v_ArrVal_3133)) |c_#memory_int|))) is different from true [2022-11-16 12:47:17,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:47:17,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:47:17,170 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 27 treesize of output 30 [2022-11-16 12:47:17,189 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 12:47:17,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-16 12:47:17,196 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 7 treesize of output 3 [2022-11-16 12:47:17,431 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 12:47:17,433 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 12:47:17,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-11-16 12:47:17,452 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 13 treesize of output 9 [2022-11-16 12:47:17,461 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_arrayElimArr_2 (Array Int Int)) (|save_byte_from_array_~storage#1.base| Int) (v_ArrVal_3137 (Array Int Int))) (and (= (store |c_old(#memory_int)| |save_byte_from_array_~storage#1.base| v_ArrVal_3137) |c_#memory_int|) (= (store |c_old(#memory_$Pointer$.offset)| |save_byte_from_array_~storage#1.base| v_arrayElimArr_2) |c_#memory_$Pointer$.offset|))) is different from true [2022-11-16 12:47:17,474 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 12:47:17,490 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 12:47:17,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 25 [2022-11-16 12:47:17,496 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 10 treesize of output 6 [2022-11-16 12:47:20,196 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 101 proven. 79 refuted. 0 times theorem prover too weak. 52 trivial. 2 not checked. [2022-11-16 12:47:20,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:47:22,074 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 38 proven. 20 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2022-11-16 12:47:22,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50450354] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:47:22,075 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:47:22,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 38, 13] total 71 [2022-11-16 12:47:22,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461479302] [2022-11-16 12:47:22,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:47:22,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-11-16 12:47:22,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:47:22,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-11-16 12:47:22,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=4421, Unknown=4, NotChecked=270, Total=4970 [2022-11-16 12:47:22,078 INFO L87 Difference]: Start difference. First operand 814 states and 1232 transitions. Second operand has 71 states, 64 states have (on average 3.390625) internal successors, (217), 61 states have internal predecessors, (217), 22 states have call successors, (59), 9 states have call predecessors, (59), 17 states have return successors, (58), 22 states have call predecessors, (58), 22 states have call successors, (58) [2022-11-16 12:47:48,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:47:48,831 INFO L93 Difference]: Finished difference Result 1710 states and 2963 transitions. [2022-11-16 12:47:48,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-11-16 12:47:48,832 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 64 states have (on average 3.390625) internal successors, (217), 61 states have internal predecessors, (217), 22 states have call successors, (59), 9 states have call predecessors, (59), 17 states have return successors, (58), 22 states have call predecessors, (58), 22 states have call successors, (58) Word has length 167 [2022-11-16 12:47:48,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:47:48,843 INFO L225 Difference]: With dead ends: 1710 [2022-11-16 12:47:48,843 INFO L226 Difference]: Without dead ends: 1412 [2022-11-16 12:47:48,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 522 GetRequests, 351 SyntacticMatches, 13 SemanticMatches, 158 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 7614 ImplicationChecksByTransitivity, 14.5s TimeCoverageRelationStatistics Valid=1925, Invalid=22828, Unknown=61, NotChecked=626, Total=25440 [2022-11-16 12:47:48,849 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 1034 mSDsluCounter, 1880 mSDsCounter, 0 mSdLazyCounter, 11679 mSolverCounterSat, 1976 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1060 SdHoareTripleChecker+Valid, 1988 SdHoareTripleChecker+Invalid, 17486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1976 IncrementalHoareTripleChecker+Valid, 11679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3831 IncrementalHoareTripleChecker+Unchecked, 16.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:47:48,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1060 Valid, 1988 Invalid, 17486 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1976 Valid, 11679 Invalid, 0 Unknown, 3831 Unchecked, 16.4s Time] [2022-11-16 12:47:48,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1412 states. [2022-11-16 12:47:49,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1412 to 914. [2022-11-16 12:47:49,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 914 states, 607 states have (on average 1.1103789126853376) internal successors, (674), 616 states have internal predecessors, (674), 234 states have call successors, (234), 65 states have call predecessors, (234), 72 states have return successors, (442), 232 states have call predecessors, (442), 232 states have call successors, (442) [2022-11-16 12:47:49,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 914 states to 914 states and 1350 transitions. [2022-11-16 12:47:49,061 INFO L78 Accepts]: Start accepts. Automaton has 914 states and 1350 transitions. Word has length 167 [2022-11-16 12:47:49,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:47:49,062 INFO L495 AbstractCegarLoop]: Abstraction has 914 states and 1350 transitions. [2022-11-16 12:47:49,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 64 states have (on average 3.390625) internal successors, (217), 61 states have internal predecessors, (217), 22 states have call successors, (59), 9 states have call predecessors, (59), 17 states have return successors, (58), 22 states have call predecessors, (58), 22 states have call successors, (58) [2022-11-16 12:47:49,062 INFO L276 IsEmpty]: Start isEmpty. Operand 914 states and 1350 transitions. [2022-11-16 12:47:49,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-11-16 12:47:49,066 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:47:49,067 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:47:49,083 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-16 12:47:49,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:47:49,279 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:47:49,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:47:49,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1883827350, now seen corresponding path program 1 times [2022-11-16 12:47:49,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:47:49,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135085091] [2022-11-16 12:47:49,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:47:49,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:47:49,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:47:51,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:47:51,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:47:51,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-16 12:47:51,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:47:51,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 12:47:51,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:47:51,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:47:51,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:47:51,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:47:51,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:47:51,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:47:51,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:47:51,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-16 12:47:51,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:47:51,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-16 12:47:51,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:47:51,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-11-16 12:47:51,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:47:51,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-11-16 12:47:51,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:47:51,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-11-16 12:47:51,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:47:51,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-11-16 12:47:51,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:47:51,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-11-16 12:47:51,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:47:51,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-11-16 12:47:51,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:47:51,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2022-11-16 12:47:51,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:47:51,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2022-11-16 12:47:51,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:47:51,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:47:51,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:47:51,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-16 12:47:51,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:47:51,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2022-11-16 12:47:51,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:47:51,560 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 44 proven. 23 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-11-16 12:47:51,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:47:51,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135085091] [2022-11-16 12:47:51,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135085091] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:47:51,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422423638] [2022-11-16 12:47:51,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:47:51,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:47:51,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:47:51,562 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:47:51,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-16 12:47:52,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:47:52,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 2887 conjuncts, 88 conjunts are in the unsatisfiable core [2022-11-16 12:47:52,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:47:52,297 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 10 treesize of output 8 [2022-11-16 12:47:52,361 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 12:47:52,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:47:52,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:47:52,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:47:52,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 52 [2022-11-16 12:47:55,626 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 97 proven. 39 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-11-16 12:47:55,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:48:02,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422423638] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:48:02,625 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:48:02,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 23] total 32 [2022-11-16 12:48:02,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633095730] [2022-11-16 12:48:02,625 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:48:02,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-16 12:48:02,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:48:02,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-16 12:48:02,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1546, Unknown=0, NotChecked=0, Total=1722 [2022-11-16 12:48:02,627 INFO L87 Difference]: Start difference. First operand 914 states and 1350 transitions. Second operand has 32 states, 29 states have (on average 4.793103448275862) internal successors, (139), 29 states have internal predecessors, (139), 13 states have call successors, (38), 8 states have call predecessors, (38), 7 states have return successors, (37), 10 states have call predecessors, (37), 12 states have call successors, (37) [2022-11-16 12:48:08,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:48:08,571 INFO L93 Difference]: Finished difference Result 1252 states and 1957 transitions. [2022-11-16 12:48:08,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-11-16 12:48:08,574 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 29 states have (on average 4.793103448275862) internal successors, (139), 29 states have internal predecessors, (139), 13 states have call successors, (38), 8 states have call predecessors, (38), 7 states have return successors, (37), 10 states have call predecessors, (37), 12 states have call successors, (37) Word has length 161 [2022-11-16 12:48:08,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:48:08,581 INFO L225 Difference]: With dead ends: 1252 [2022-11-16 12:48:08,581 INFO L226 Difference]: Without dead ends: 1009 [2022-11-16 12:48:08,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 266 SyntacticMatches, 14 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1398 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=510, Invalid=4040, Unknown=6, NotChecked=0, Total=4556 [2022-11-16 12:48:08,585 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 244 mSDsluCounter, 970 mSDsCounter, 0 mSdLazyCounter, 1877 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 1111 SdHoareTripleChecker+Invalid, 3206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 1877 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1180 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-16 12:48:08,585 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [280 Valid, 1111 Invalid, 3206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 1877 Invalid, 0 Unknown, 1180 Unchecked, 1.9s Time] [2022-11-16 12:48:08,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1009 states. [2022-11-16 12:48:08,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1009 to 902. [2022-11-16 12:48:08,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 902 states, 596 states have (on average 1.1090604026845639) internal successors, (661), 604 states have internal predecessors, (661), 234 states have call successors, (234), 65 states have call predecessors, (234), 71 states have return successors, (426), 232 states have call predecessors, (426), 232 states have call successors, (426) [2022-11-16 12:48:08,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 1321 transitions. [2022-11-16 12:48:08,761 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 1321 transitions. Word has length 161 [2022-11-16 12:48:08,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:48:08,762 INFO L495 AbstractCegarLoop]: Abstraction has 902 states and 1321 transitions. [2022-11-16 12:48:08,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 29 states have (on average 4.793103448275862) internal successors, (139), 29 states have internal predecessors, (139), 13 states have call successors, (38), 8 states have call predecessors, (38), 7 states have return successors, (37), 10 states have call predecessors, (37), 12 states have call successors, (37) [2022-11-16 12:48:08,763 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 1321 transitions. [2022-11-16 12:48:08,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-11-16 12:48:08,766 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:48:08,766 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:48:08,777 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-16 12:48:08,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-16 12:48:08,977 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:48:08,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:48:08,977 INFO L85 PathProgramCache]: Analyzing trace with hash -1684992562, now seen corresponding path program 1 times [2022-11-16 12:48:08,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:48:08,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580669641] [2022-11-16 12:48:08,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:48:08,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:48:09,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:09,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:48:09,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:09,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-16 12:48:09,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:09,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 12:48:09,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:09,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:48:09,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:09,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:48:09,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:09,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:48:09,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:09,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-16 12:48:09,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:09,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-16 12:48:09,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:09,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-11-16 12:48:09,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:10,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-11-16 12:48:10,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:10,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 12:48:10,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:10,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-11-16 12:48:10,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:10,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 12:48:10,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:10,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-11-16 12:48:10,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:10,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2022-11-16 12:48:10,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:10,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2022-11-16 12:48:10,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:10,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-11-16 12:48:10,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:10,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2022-11-16 12:48:10,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:10,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:48:10,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:10,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-16 12:48:10,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:10,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2022-11-16 12:48:10,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:10,401 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-11-16 12:48:10,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:48:10,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580669641] [2022-11-16 12:48:10,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580669641] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:48:10,402 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:48:10,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-11-16 12:48:10,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528267063] [2022-11-16 12:48:10,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:48:10,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-16 12:48:10,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:48:10,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-16 12:48:10,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2022-11-16 12:48:10,403 INFO L87 Difference]: Start difference. First operand 902 states and 1321 transitions. Second operand has 15 states, 14 states have (on average 5.142857142857143) internal successors, (72), 12 states have internal predecessors, (72), 5 states have call successors, (21), 5 states have call predecessors, (21), 3 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) [2022-11-16 12:48:12,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:48:12,472 INFO L93 Difference]: Finished difference Result 1225 states and 1907 transitions. [2022-11-16 12:48:12,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-16 12:48:12,475 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 5.142857142857143) internal successors, (72), 12 states have internal predecessors, (72), 5 states have call successors, (21), 5 states have call predecessors, (21), 3 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) Word has length 163 [2022-11-16 12:48:12,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:48:12,482 INFO L225 Difference]: With dead ends: 1225 [2022-11-16 12:48:12,482 INFO L226 Difference]: Without dead ends: 1005 [2022-11-16 12:48:12,485 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2022-11-16 12:48:12,485 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 324 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 1677 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 1850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 1677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:48:12,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [347 Valid, 536 Invalid, 1850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 1677 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-16 12:48:12,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1005 states. [2022-11-16 12:48:12,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1005 to 911. [2022-11-16 12:48:12,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 911 states, 602 states have (on average 1.1079734219269104) internal successors, (667), 611 states have internal predecessors, (667), 236 states have call successors, (236), 65 states have call predecessors, (236), 72 states have return successors, (432), 234 states have call predecessors, (432), 234 states have call successors, (432) [2022-11-16 12:48:12,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 911 states to 911 states and 1335 transitions. [2022-11-16 12:48:12,687 INFO L78 Accepts]: Start accepts. Automaton has 911 states and 1335 transitions. Word has length 163 [2022-11-16 12:48:12,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:48:12,687 INFO L495 AbstractCegarLoop]: Abstraction has 911 states and 1335 transitions. [2022-11-16 12:48:12,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 5.142857142857143) internal successors, (72), 12 states have internal predecessors, (72), 5 states have call successors, (21), 5 states have call predecessors, (21), 3 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) [2022-11-16 12:48:12,688 INFO L276 IsEmpty]: Start isEmpty. Operand 911 states and 1335 transitions. [2022-11-16 12:48:12,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-11-16 12:48:12,691 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:48:12,692 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:48:12,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-16 12:48:12,692 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:48:12,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:48:12,692 INFO L85 PathProgramCache]: Analyzing trace with hash 763461394, now seen corresponding path program 1 times [2022-11-16 12:48:12,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:48:12,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353001056] [2022-11-16 12:48:12,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:48:12,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:48:13,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:13,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:48:13,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:13,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-16 12:48:13,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:13,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 12:48:13,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:13,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:48:13,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:13,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:48:13,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:13,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:48:13,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:13,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-16 12:48:13,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:13,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-16 12:48:13,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:13,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-11-16 12:48:13,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:13,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-11-16 12:48:13,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:13,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 12:48:13,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:13,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-11-16 12:48:13,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:13,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 12:48:13,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:13,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-11-16 12:48:13,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:13,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2022-11-16 12:48:13,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:13,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2022-11-16 12:48:13,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:13,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-11-16 12:48:13,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:13,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2022-11-16 12:48:13,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:13,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:48:13,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:13,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-16 12:48:13,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:14,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2022-11-16 12:48:14,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:14,234 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-11-16 12:48:14,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:48:14,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353001056] [2022-11-16 12:48:14,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353001056] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:48:14,234 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:48:14,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-16 12:48:14,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113723974] [2022-11-16 12:48:14,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:48:14,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 12:48:14,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:48:14,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 12:48:14,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2022-11-16 12:48:14,236 INFO L87 Difference]: Start difference. First operand 911 states and 1335 transitions. Second operand has 14 states, 13 states have (on average 5.538461538461538) internal successors, (72), 11 states have internal predecessors, (72), 5 states have call successors, (21), 5 states have call predecessors, (21), 3 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) [2022-11-16 12:48:16,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:48:16,030 INFO L93 Difference]: Finished difference Result 1246 states and 1959 transitions. [2022-11-16 12:48:16,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-16 12:48:16,031 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 5.538461538461538) internal successors, (72), 11 states have internal predecessors, (72), 5 states have call successors, (21), 5 states have call predecessors, (21), 3 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) Word has length 163 [2022-11-16 12:48:16,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:48:16,036 INFO L225 Difference]: With dead ends: 1246 [2022-11-16 12:48:16,036 INFO L226 Difference]: Without dead ends: 1005 [2022-11-16 12:48:16,039 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2022-11-16 12:48:16,040 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 321 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 1416 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 1588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 1416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:48:16,041 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [344 Valid, 499 Invalid, 1588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 1416 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-16 12:48:16,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1005 states. [2022-11-16 12:48:16,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1005 to 922. [2022-11-16 12:48:16,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 922 states, 606 states have (on average 1.1072607260726073) internal successors, (671), 614 states have internal predecessors, (671), 244 states have call successors, (244), 65 states have call predecessors, (244), 71 states have return successors, (436), 242 states have call predecessors, (436), 242 states have call successors, (436) [2022-11-16 12:48:16,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 922 states to 922 states and 1351 transitions. [2022-11-16 12:48:16,277 INFO L78 Accepts]: Start accepts. Automaton has 922 states and 1351 transitions. Word has length 163 [2022-11-16 12:48:16,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:48:16,277 INFO L495 AbstractCegarLoop]: Abstraction has 922 states and 1351 transitions. [2022-11-16 12:48:16,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 5.538461538461538) internal successors, (72), 11 states have internal predecessors, (72), 5 states have call successors, (21), 5 states have call predecessors, (21), 3 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) [2022-11-16 12:48:16,277 INFO L276 IsEmpty]: Start isEmpty. Operand 922 states and 1351 transitions. [2022-11-16 12:48:16,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-11-16 12:48:16,281 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:48:16,281 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:48:16,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-16 12:48:16,282 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:48:16,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:48:16,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1118095855, now seen corresponding path program 1 times [2022-11-16 12:48:16,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:48:16,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033932927] [2022-11-16 12:48:16,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:48:16,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:48:16,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:16,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:48:16,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:16,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-16 12:48:16,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:16,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 12:48:17,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:17,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:48:17,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:17,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:48:17,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:17,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:48:17,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:17,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-16 12:48:17,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:17,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-16 12:48:17,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:17,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-11-16 12:48:17,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:17,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-11-16 12:48:17,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:17,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-11-16 12:48:17,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:17,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-11-16 12:48:17,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:17,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-11-16 12:48:17,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:17,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-11-16 12:48:17,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:17,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2022-11-16 12:48:17,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:17,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2022-11-16 12:48:17,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:17,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:48:17,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:17,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-16 12:48:17,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:17,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2022-11-16 12:48:17,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:17,202 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2022-11-16 12:48:17,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:48:17,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033932927] [2022-11-16 12:48:17,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033932927] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:48:17,203 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:48:17,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-16 12:48:17,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56686820] [2022-11-16 12:48:17,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:48:17,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-16 12:48:17,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:48:17,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-16 12:48:17,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2022-11-16 12:48:17,204 INFO L87 Difference]: Start difference. First operand 922 states and 1351 transitions. Second operand has 13 states, 12 states have (on average 4.916666666666667) internal successors, (59), 8 states have internal predecessors, (59), 2 states have call successors, (20), 5 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) [2022-11-16 12:48:18,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:48:18,457 INFO L93 Difference]: Finished difference Result 948 states and 1384 transitions. [2022-11-16 12:48:18,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 12:48:18,458 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 4.916666666666667) internal successors, (59), 8 states have internal predecessors, (59), 2 states have call successors, (20), 5 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) Word has length 163 [2022-11-16 12:48:18,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:48:18,464 INFO L225 Difference]: With dead ends: 948 [2022-11-16 12:48:18,465 INFO L226 Difference]: Without dead ends: 946 [2022-11-16 12:48:18,466 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2022-11-16 12:48:18,467 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 126 mSDsluCounter, 541 mSDsCounter, 0 mSdLazyCounter, 1202 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 632 SdHoareTripleChecker+Invalid, 1241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-16 12:48:18,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 632 Invalid, 1241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1202 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-16 12:48:18,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2022-11-16 12:48:18,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 938. [2022-11-16 12:48:18,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 938 states, 612 states have (on average 1.1062091503267975) internal successors, (677), 620 states have internal predecessors, (677), 252 states have call successors, (252), 67 states have call predecessors, (252), 73 states have return successors, (444), 250 states have call predecessors, (444), 250 states have call successors, (444) [2022-11-16 12:48:18,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 1373 transitions. [2022-11-16 12:48:18,671 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 1373 transitions. Word has length 163 [2022-11-16 12:48:18,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:48:18,672 INFO L495 AbstractCegarLoop]: Abstraction has 938 states and 1373 transitions. [2022-11-16 12:48:18,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 4.916666666666667) internal successors, (59), 8 states have internal predecessors, (59), 2 states have call successors, (20), 5 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) [2022-11-16 12:48:18,672 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 1373 transitions. [2022-11-16 12:48:18,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-11-16 12:48:18,676 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:48:18,676 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:48:18,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-11-16 12:48:18,677 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:48:18,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:48:18,677 INFO L85 PathProgramCache]: Analyzing trace with hash 233953810, now seen corresponding path program 1 times [2022-11-16 12:48:18,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:48:18,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551774529] [2022-11-16 12:48:18,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:48:18,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:48:19,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:21,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:48:21,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:21,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-16 12:48:21,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:21,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 12:48:21,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:21,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:48:21,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:21,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:48:21,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:21,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:48:21,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:21,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-16 12:48:21,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:21,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-16 12:48:21,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:21,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-11-16 12:48:21,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:21,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-11-16 12:48:21,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:21,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 12:48:21,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:22,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-11-16 12:48:22,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:22,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 12:48:22,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:22,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-11-16 12:48:22,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:22,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2022-11-16 12:48:22,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:22,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-11-16 12:48:22,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:22,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2022-11-16 12:48:22,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:22,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2022-11-16 12:48:22,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:22,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:48:22,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:22,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-16 12:48:22,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:22,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2022-11-16 12:48:22,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:22,530 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2022-11-16 12:48:22,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:48:22,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551774529] [2022-11-16 12:48:22,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551774529] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:48:22,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018158527] [2022-11-16 12:48:22,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:48:22,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:48:22,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:48:22,531 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:48:22,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-16 12:48:23,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:23,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 2966 conjuncts, 105 conjunts are in the unsatisfiable core [2022-11-16 12:48:23,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:48:27,867 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 22 treesize of output 23 [2022-11-16 12:48:27,870 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 24 treesize of output 16 [2022-11-16 12:48:27,931 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 12:48:27,931 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-16 12:48:30,254 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 12:48:32,448 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 12:48:32,450 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 25 [2022-11-16 12:48:32,462 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 10 treesize of output 6 [2022-11-16 12:48:32,617 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:48:32,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 34 treesize of output 52 [2022-11-16 12:48:35,091 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 11 treesize of output 7 [2022-11-16 12:48:35,099 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 12:48:35,101 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 12:48:35,136 WARN L855 $PredicateComparison]: unable to prove that (and (or (not (= |c_save_byte_from_array_#in~array#1.base| 0)) (not (= |c_save_byte_from_array_#in~array#1.offset| 0))) (exists ((v_ArrVal_3944 (Array Int Int))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_save_byte_from_array_#in~storage#1.base| v_ArrVal_3944))) (exists ((v_ArrVal_3947 (Array Int Int))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_save_byte_from_array_#in~storage#1.base| v_ArrVal_3947))) (exists ((v_ArrVal_3946 Int) (v_ArrVal_3942 Int)) (= (store |c_old(#memory_int)| |c_save_byte_from_array_#in~storage#1.base| (store (store (select |c_old(#memory_int)| |c_save_byte_from_array_#in~storage#1.base|) |c_save_byte_from_array_#in~storage#1.offset| v_ArrVal_3942) (+ |c_save_byte_from_array_#in~storage#1.offset| 8) v_ArrVal_3946)) |c_#memory_int|))) is different from true [2022-11-16 12:48:35,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:48:35,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:48:35,165 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 32 treesize of output 35 [2022-11-16 12:48:35,184 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 12:48:35,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 34 [2022-11-16 12:48:35,202 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 12:48:35,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 32 [2022-11-16 12:48:35,216 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 8 treesize of output 4 [2022-11-16 12:49:24,924 WARN L233 SmtUtils]: Spent 10.35s 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 12:50:03,892 WARN L855 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_aws_byte_buf_eq_ignore_case_~b#1.base_BEFORE_CALL_27| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_buf_eq_ignore_case_~b#1.base_BEFORE_CALL_27|) 8) 0))) (exists ((|v_ULTIMATE.start_aws_byte_buf_eq_ignore_case_~b#1.base_BEFORE_CALL_27| Int)) (not (= (mod (select (select |c_#memory_int| |v_ULTIMATE.start_aws_byte_buf_eq_ignore_case_~b#1.base_BEFORE_CALL_27|) 16) 18446744073709551616) 0))) (exists ((|v_ULTIMATE.start_aws_byte_buf_eq_ignore_case_~b#1.base_BEFORE_CALL_27| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_byte_buf_eq_ignore_case_~b#1.base_BEFORE_CALL_27|) 8) 0)))) is different from true [2022-11-16 12:50:20,468 WARN L233 SmtUtils]: Spent 10.38s on a formula simplification that was a NOOP. DAG size: 32 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:50:29,374 WARN L233 SmtUtils]: Spent 8.69s on a formula simplification that was a NOOP. DAG size: 43 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:50:46,306 WARN L233 SmtUtils]: Spent 12.06s on a formula simplification that was a NOOP. DAG size: 48 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:50:56,893 WARN L233 SmtUtils]: Spent 10.36s on a formula simplification that was a NOOP. DAG size: 48 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:51:08,491 WARN L233 SmtUtils]: Spent 11.36s on a formula simplification that was a NOOP. DAG size: 40 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:51:08,578 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 158 proven. 49 refuted. 0 times theorem prover too weak. 24 trivial. 3 not checked. [2022-11-16 12:51:08,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:51:27,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018158527] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:51:27,507 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:51:27,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 32] total 52 [2022-11-16 12:51:27,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832653078] [2022-11-16 12:51:27,508 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:51:27,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-11-16 12:51:27,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:51:27,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-11-16 12:51:27,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=3160, Unknown=64, NotChecked=230, Total=3660 [2022-11-16 12:51:27,511 INFO L87 Difference]: Start difference. First operand 938 states and 1373 transitions. Second operand has 52 states, 47 states have (on average 3.5531914893617023) internal successors, (167), 41 states have internal predecessors, (167), 15 states have call successors, (43), 11 states have call predecessors, (43), 13 states have return successors, (42), 16 states have call predecessors, (42), 15 states have call successors, (42) [2022-11-16 12:52:26,150 WARN L233 SmtUtils]: Spent 8.18s on a formula simplification that was a NOOP. DAG size: 41 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:52:34,695 WARN L233 SmtUtils]: Spent 8.44s on a formula simplification that was a NOOP. DAG size: 47 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:52:44,887 WARN L233 SmtUtils]: Spent 10.08s on a formula simplification that was a NOOP. DAG size: 58 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:52:52,060 WARN L233 SmtUtils]: Spent 7.05s on a formula simplification that was a NOOP. DAG size: 44 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:53:00,338 WARN L233 SmtUtils]: Spent 8.17s on a formula simplification that was a NOOP. DAG size: 61 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:53:06,577 WARN L233 SmtUtils]: Spent 6.13s on a formula simplification that was a NOOP. DAG size: 44 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:53:16,763 WARN L233 SmtUtils]: Spent 10.07s on a formula simplification that was a NOOP. DAG size: 64 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:53:27,232 WARN L233 SmtUtils]: Spent 10.36s on a formula simplification that was a NOOP. DAG size: 52 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:53:39,389 WARN L233 SmtUtils]: Spent 12.06s on a formula simplification that was a NOOP. DAG size: 52 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:53:50,179 WARN L233 SmtUtils]: Spent 10.70s on a formula simplification that was a NOOP. DAG size: 44 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:54:00,907 WARN L233 SmtUtils]: Spent 10.46s on a formula simplification that was a NOOP. DAG size: 49 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:54:11,587 WARN L233 SmtUtils]: Spent 10.45s on a formula simplification that was a NOOP. DAG size: 34 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:54:21,460 WARN L233 SmtUtils]: Spent 9.77s on a formula simplification that was a NOOP. DAG size: 49 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:54:37,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:54:37,706 INFO L93 Difference]: Finished difference Result 1475 states and 2110 transitions. [2022-11-16 12:54:37,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-11-16 12:54:37,707 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 47 states have (on average 3.5531914893617023) internal successors, (167), 41 states have internal predecessors, (167), 15 states have call successors, (43), 11 states have call predecessors, (43), 13 states have return successors, (42), 16 states have call predecessors, (42), 15 states have call successors, (42) Word has length 167 [2022-11-16 12:54:37,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:54:37,715 INFO L225 Difference]: With dead ends: 1475 [2022-11-16 12:54:37,715 INFO L226 Difference]: Without dead ends: 1073 [2022-11-16 12:54:37,719 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 252 SyntacticMatches, 16 SemanticMatches, 110 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 3413 ImplicationChecksByTransitivity, 366.6s TimeCoverageRelationStatistics Valid=805, Invalid=11069, Unknown=124, NotChecked=434, Total=12432 [2022-11-16 12:54:37,720 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 615 mSDsluCounter, 1631 mSDsCounter, 0 mSdLazyCounter, 4521 mSolverCounterSat, 569 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 626 SdHoareTripleChecker+Valid, 1742 SdHoareTripleChecker+Invalid, 7621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 569 IncrementalHoareTripleChecker+Valid, 4521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2531 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-11-16 12:54:37,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [626 Valid, 1742 Invalid, 7621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [569 Valid, 4521 Invalid, 0 Unknown, 2531 Unchecked, 5.9s Time] [2022-11-16 12:54:37,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1073 states. [2022-11-16 12:54:37,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1073 to 1034. [2022-11-16 12:54:37,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1034 states, 678 states have (on average 1.0973451327433628) internal successors, (744), 685 states have internal predecessors, (744), 275 states have call successors, (275), 75 states have call predecessors, (275), 80 states have return successors, (474), 273 states have call predecessors, (474), 273 states have call successors, (474) [2022-11-16 12:54:37,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 1493 transitions. [2022-11-16 12:54:37,966 INFO L78 Accepts]: Start accepts. Automaton has 1034 states and 1493 transitions. Word has length 167 [2022-11-16 12:54:37,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:54:37,967 INFO L495 AbstractCegarLoop]: Abstraction has 1034 states and 1493 transitions. [2022-11-16 12:54:37,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 47 states have (on average 3.5531914893617023) internal successors, (167), 41 states have internal predecessors, (167), 15 states have call successors, (43), 11 states have call predecessors, (43), 13 states have return successors, (42), 16 states have call predecessors, (42), 15 states have call successors, (42) [2022-11-16 12:54:37,968 INFO L276 IsEmpty]: Start isEmpty. Operand 1034 states and 1493 transitions. [2022-11-16 12:54:37,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-11-16 12:54:37,973 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:54:37,973 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:54:37,989 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-16 12:54:38,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-16 12:54:38,184 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:54:38,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:54:38,184 INFO L85 PathProgramCache]: Analyzing trace with hash -31255325, now seen corresponding path program 1 times [2022-11-16 12:54:38,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:54:38,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652490572] [2022-11-16 12:54:38,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:54:38,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:54:39,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:54:42,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:54:42,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:54:42,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-16 12:54:42,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:54:42,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 12:54:42,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:54:42,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:54:42,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:54:42,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:54:42,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:54:43,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:54:43,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:54:43,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-16 12:54:43,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:54:43,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-16 12:54:43,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:54:43,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-11-16 12:54:43,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:54:43,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-11-16 12:54:43,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:54:43,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 12:54:43,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:54:43,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-11-16 12:54:43,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:54:43,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 12:54:43,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:54:43,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-11-16 12:54:43,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:54:43,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2022-11-16 12:54:43,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:54:43,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-11-16 12:54:43,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:54:43,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2022-11-16 12:54:43,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:54:43,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2022-11-16 12:54:43,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:54:43,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:54:43,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:54:43,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-16 12:54:43,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:54:43,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2022-11-16 12:54:43,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:54:43,924 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 32 proven. 20 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2022-11-16 12:54:43,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:54:43,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652490572] [2022-11-16 12:54:43,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652490572] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:54:43,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422925093] [2022-11-16 12:54:43,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:54:43,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:54:43,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:54:43,926 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:54:43,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-16 12:54:44,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:54:44,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 2975 conjuncts, 61 conjunts are in the unsatisfiable core [2022-11-16 12:54:44,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:54:44,813 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 12:54:44,813 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-16 12:54:45,298 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-16 12:54:45,299 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-16 12:54:45,806 INFO L321 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2022-11-16 12:54:45,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 19 [2022-11-16 12:54:45,959 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 12:54:46,046 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-16 12:54:46,046 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 15 treesize of output 15 [2022-11-16 12:54:46,290 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 8 treesize of output 1 [2022-11-16 12:54:46,432 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 28 treesize of output 27 [2022-11-16 12:55:19,991 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 152 proven. 69 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-16 12:55:19,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:55:20,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422925093] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:55:20,590 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:55:20,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 18] total 39 [2022-11-16 12:55:20,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622110328] [2022-11-16 12:55:20,591 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:55:20,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-16 12:55:20,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:55:20,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-16 12:55:20,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1479, Unknown=7, NotChecked=0, Total=1640 [2022-11-16 12:55:20,594 INFO L87 Difference]: Start difference. First operand 1034 states and 1493 transitions. Second operand has 39 states, 35 states have (on average 5.057142857142857) internal successors, (177), 32 states have internal predecessors, (177), 14 states have call successors, (41), 9 states have call predecessors, (41), 12 states have return successors, (40), 15 states have call predecessors, (40), 14 states have call successors, (40) [2022-11-16 12:55:38,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:55:38,394 INFO L93 Difference]: Finished difference Result 1328 states and 1825 transitions. [2022-11-16 12:55:38,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-16 12:55:38,396 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 35 states have (on average 5.057142857142857) internal successors, (177), 32 states have internal predecessors, (177), 14 states have call successors, (41), 9 states have call predecessors, (41), 12 states have return successors, (40), 15 states have call predecessors, (40), 14 states have call successors, (40) Word has length 173 [2022-11-16 12:55:38,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:55:38,403 INFO L225 Difference]: With dead ends: 1328 [2022-11-16 12:55:38,403 INFO L226 Difference]: Without dead ends: 1035 [2022-11-16 12:55:38,406 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 270 SyntacticMatches, 20 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1381 ImplicationChecksByTransitivity, 49.0s TimeCoverageRelationStatistics Valid=405, Invalid=3865, Unknown=20, NotChecked=0, Total=4290 [2022-11-16 12:55:38,406 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 369 mSDsluCounter, 924 mSDsCounter, 0 mSdLazyCounter, 2749 mSolverCounterSat, 455 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 1042 SdHoareTripleChecker+Invalid, 3897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 455 IncrementalHoareTripleChecker+Valid, 2749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 693 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-11-16 12:55:38,407 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [382 Valid, 1042 Invalid, 3897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [455 Valid, 2749 Invalid, 0 Unknown, 693 Unchecked, 3.9s Time] [2022-11-16 12:55:38,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1035 states. [2022-11-16 12:55:38,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1035 to 1019. [2022-11-16 12:55:38,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1019 states, 680 states have (on average 1.1) internal successors, (748), 689 states have internal predecessors, (748), 256 states have call successors, (256), 75 states have call predecessors, (256), 82 states have return successors, (444), 254 states have call predecessors, (444), 254 states have call successors, (444) [2022-11-16 12:55:38,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1019 states to 1019 states and 1448 transitions. [2022-11-16 12:55:38,634 INFO L78 Accepts]: Start accepts. Automaton has 1019 states and 1448 transitions. Word has length 173 [2022-11-16 12:55:38,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:55:38,634 INFO L495 AbstractCegarLoop]: Abstraction has 1019 states and 1448 transitions. [2022-11-16 12:55:38,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 35 states have (on average 5.057142857142857) internal successors, (177), 32 states have internal predecessors, (177), 14 states have call successors, (41), 9 states have call predecessors, (41), 12 states have return successors, (40), 15 states have call predecessors, (40), 14 states have call successors, (40) [2022-11-16 12:55:38,635 INFO L276 IsEmpty]: Start isEmpty. Operand 1019 states and 1448 transitions. [2022-11-16 12:55:38,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-11-16 12:55:38,640 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:55:38,641 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:55:38,664 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-16 12:55:38,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-16 12:55:38,855 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:55:38,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:55:38,855 INFO L85 PathProgramCache]: Analyzing trace with hash -46774043, now seen corresponding path program 1 times [2022-11-16 12:55:38,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:55:38,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039765772] [2022-11-16 12:55:38,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:55:38,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:55:39,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:55:44,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:55:44,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:55:44,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-16 12:55:44,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:55:44,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 12:55:44,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:55:44,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:55:44,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:55:44,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:55:44,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:55:44,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:55:44,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:55:44,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-16 12:55:44,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:55:44,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-16 12:55:44,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:55:44,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-11-16 12:55:44,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:55:44,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-11-16 12:55:44,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:55:44,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 12:55:44,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:55:44,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-11-16 12:55:44,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:55:44,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 12:55:44,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:55:44,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-11-16 12:55:44,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:55:44,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2022-11-16 12:55:44,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:55:44,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-11-16 12:55:44,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:55:44,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2022-11-16 12:55:44,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:55:44,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2022-11-16 12:55:44,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:55:44,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:55:44,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:55:44,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-16 12:55:44,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:55:44,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2022-11-16 12:55:44,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:55:44,838 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2022-11-16 12:55:44,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:55:44,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039765772] [2022-11-16 12:55:44,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039765772] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:55:44,839 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:55:44,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-11-16 12:55:44,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556447311] [2022-11-16 12:55:44,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:55:44,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-16 12:55:44,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:55:44,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-16 12:55:44,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2022-11-16 12:55:44,840 INFO L87 Difference]: Start difference. First operand 1019 states and 1448 transitions. Second operand has 21 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 10 states have call successors, (21), 5 states have call predecessors, (21), 5 states have return successors, (20), 10 states have call predecessors, (20), 10 states have call successors, (20) [2022-11-16 12:55:47,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:55:47,503 INFO L93 Difference]: Finished difference Result 1171 states and 1647 transitions. [2022-11-16 12:55:47,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-16 12:55:47,504 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 10 states have call successors, (21), 5 states have call predecessors, (21), 5 states have return successors, (20), 10 states have call predecessors, (20), 10 states have call successors, (20) Word has length 173 [2022-11-16 12:55:47,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:55:47,512 INFO L225 Difference]: With dead ends: 1171 [2022-11-16 12:55:47,513 INFO L226 Difference]: Without dead ends: 1028 [2022-11-16 12:55:47,515 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=150, Invalid=780, Unknown=0, NotChecked=0, Total=930 [2022-11-16 12:55:47,515 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 242 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 1812 mSolverCounterSat, 220 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 2032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 220 IncrementalHoareTripleChecker+Valid, 1812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:55:47,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [278 Valid, 290 Invalid, 2032 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [220 Valid, 1812 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-16 12:55:47,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1028 states. [2022-11-16 12:55:47,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1028 to 1021. [2022-11-16 12:55:47,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1021 states, 681 states have (on average 1.0983847283406756) internal successors, (748), 691 states have internal predecessors, (748), 256 states have call successors, (256), 75 states have call predecessors, (256), 83 states have return successors, (446), 254 states have call predecessors, (446), 254 states have call successors, (446) [2022-11-16 12:55:47,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1021 states to 1021 states and 1450 transitions. [2022-11-16 12:55:47,808 INFO L78 Accepts]: Start accepts. Automaton has 1021 states and 1450 transitions. Word has length 173 [2022-11-16 12:55:47,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:55:47,808 INFO L495 AbstractCegarLoop]: Abstraction has 1021 states and 1450 transitions. [2022-11-16 12:55:47,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 10 states have call successors, (21), 5 states have call predecessors, (21), 5 states have return successors, (20), 10 states have call predecessors, (20), 10 states have call successors, (20) [2022-11-16 12:55:47,809 INFO L276 IsEmpty]: Start isEmpty. Operand 1021 states and 1450 transitions. [2022-11-16 12:55:47,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-11-16 12:55:47,814 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:55:47,815 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:55:47,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-11-16 12:55:47,815 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:55:47,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:55:47,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1974240095, now seen corresponding path program 1 times [2022-11-16 12:55:47,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:55:47,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406658997] [2022-11-16 12:55:47,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:55:47,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:55:50,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:55:52,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:55:52,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:55:52,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-16 12:55:52,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:55:52,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 12:55:52,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:55:52,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:55:52,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:55:52,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:55:52,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:55:52,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:55:52,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:55:52,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-16 12:55:52,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:55:52,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-16 12:55:52,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:55:52,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-11-16 12:55:52,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:55:52,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-11-16 12:55:52,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:55:52,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 12:55:52,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:55:52,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-11-16 12:55:52,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:55:52,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 12:55:52,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:55:52,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-11-16 12:55:52,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:55:53,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2022-11-16 12:55:53,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:55:53,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-11-16 12:55:53,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:55:53,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2022-11-16 12:55:53,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:55:53,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2022-11-16 12:55:53,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:55:53,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:55:53,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:55:53,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-16 12:55:53,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:55:53,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2022-11-16 12:55:53,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:55:54,017 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 44 proven. 30 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2022-11-16 12:55:54,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:55:54,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406658997] [2022-11-16 12:55:54,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406658997] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:55:54,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444888668] [2022-11-16 12:55:54,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:55:54,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:55:54,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:55:54,019 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:55:54,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da24006-d90e-49e9-876e-79ba1da78b92/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-16 12:55:55,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:55:55,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 3001 conjuncts, 89 conjunts are in the unsatisfiable core [2022-11-16 12:55:55,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:55:55,198 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 10 treesize of output 8 [2022-11-16 12:55:56,249 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 24 treesize of output 24