./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0de948-ca21-48c1-a426-6defb4515f07/bin/uautomizer-tBqnrhUYjU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0de948-ca21-48c1-a426-6defb4515f07/bin/uautomizer-tBqnrhUYjU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0de948-ca21-48c1-a426-6defb4515f07/bin/uautomizer-tBqnrhUYjU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0de948-ca21-48c1-a426-6defb4515f07/bin/uautomizer-tBqnrhUYjU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0de948-ca21-48c1-a426-6defb4515f07/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0de948-ca21-48c1-a426-6defb4515f07/bin/uautomizer-tBqnrhUYjU --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 ce5362e495562dfaea277a751eacbf753e9d90aa85c88e38ea1b10dbc078ec49 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-02 22:22:32,390 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 22:22:32,394 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 22:22:32,460 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 22:22:32,461 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 22:22:32,462 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 22:22:32,465 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 22:22:32,469 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 22:22:32,472 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 22:22:32,474 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 22:22:32,475 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 22:22:32,477 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 22:22:32,478 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 22:22:32,480 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 22:22:32,482 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 22:22:32,485 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 22:22:32,486 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 22:22:32,488 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 22:22:32,491 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 22:22:32,495 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 22:22:32,497 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 22:22:32,499 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 22:22:32,501 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 22:22:32,503 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 22:22:32,508 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 22:22:32,509 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 22:22:32,509 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 22:22:32,511 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 22:22:32,512 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 22:22:32,514 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 22:22:32,514 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 22:22:32,516 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 22:22:32,517 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 22:22:32,519 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 22:22:32,521 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 22:22:32,521 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 22:22:32,523 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 22:22:32,523 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 22:22:32,524 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 22:22:32,526 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 22:22:32,527 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 22:22:32,529 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0de948-ca21-48c1-a426-6defb4515f07/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-02 22:22:32,562 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 22:22:32,562 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 22:22:32,563 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 22:22:32,564 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 22:22:32,566 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 22:22:32,566 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 22:22:32,567 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 22:22:32,567 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 22:22:32,568 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 22:22:32,568 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 22:22:32,569 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-02 22:22:32,569 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 22:22:32,570 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-02 22:22:32,571 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-02 22:22:32,571 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 22:22:32,572 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-02 22:22:32,572 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 22:22:32,573 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 22:22:32,573 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 22:22:32,574 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:22:32,574 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 22:22:32,574 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 22:22:32,575 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-02 22:22:32,575 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-02 22:22:32,575 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-02 22:22:32,576 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-02 22:22:32,576 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-02 22:22:32,576 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-02 22:22:32,576 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 22:22:32,577 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_fa0de948-ca21-48c1-a426-6defb4515f07/bin/uautomizer-tBqnrhUYjU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0de948-ca21-48c1-a426-6defb4515f07/bin/uautomizer-tBqnrhUYjU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ce5362e495562dfaea277a751eacbf753e9d90aa85c88e38ea1b10dbc078ec49 [2021-11-02 22:22:32,901 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 22:22:32,938 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 22:22:32,943 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 22:22:32,945 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 22:22:32,948 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 22:22:32,949 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0de948-ca21-48c1-a426-6defb4515f07/bin/uautomizer-tBqnrhUYjU/../../sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness.i [2021-11-02 22:22:33,031 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0de948-ca21-48c1-a426-6defb4515f07/bin/uautomizer-tBqnrhUYjU/data/eae948ac5/945227b722ab4572b6744f345c589bf2/FLAG052a230fb [2021-11-02 22:22:33,998 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 22:22:34,001 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0de948-ca21-48c1-a426-6defb4515f07/sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness.i [2021-11-02 22:22:34,063 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0de948-ca21-48c1-a426-6defb4515f07/bin/uautomizer-tBqnrhUYjU/data/eae948ac5/945227b722ab4572b6744f345c589bf2/FLAG052a230fb [2021-11-02 22:22:34,456 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0de948-ca21-48c1-a426-6defb4515f07/bin/uautomizer-tBqnrhUYjU/data/eae948ac5/945227b722ab4572b6744f345c589bf2 [2021-11-02 22:22:34,459 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 22:22:34,460 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-02 22:22:34,465 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 22:22:34,466 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 22:22:34,470 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 22:22:34,471 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:22:34" (1/1) ... [2021-11-02 22:22:34,473 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7547af58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:22:34, skipping insertion in model container [2021-11-02 22:22:34,473 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:22:34" (1/1) ... [2021-11-02 22:22:34,484 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 22:22:34,623 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 22:22:35,018 WARN L228 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_fa0de948-ca21-48c1-a426-6defb4515f07/sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness.i[4494,4507] [2021-11-02 22:22:35,027 WARN L228 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_fa0de948-ca21-48c1-a426-6defb4515f07/sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness.i[4554,4567] [2021-11-02 22:22:35,056 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-02 22:22:35,066 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-02 22:22:36,139 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 22:22:36,153 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 22:22:36,154 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 22:22:36,156 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 22:22:36,157 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 22:22:36,188 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 22:22:36,189 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 22:22:36,192 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 22:22:36,198 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 22:22:36,202 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 22:22:36,205 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 22:22:36,208 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 22:22:36,209 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 22:22:36,709 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-02 22:22:36,711 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-02 22:22:36,712 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-02 22:22:36,714 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-02 22:22:36,716 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-02 22:22:36,717 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-02 22:22:36,718 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-02 22:22:36,719 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-02 22:22:36,720 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-02 22:22:36,721 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-02 22:22:36,935 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-02 22:22:37,003 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:22:37,024 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 22:22:37,043 WARN L228 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_fa0de948-ca21-48c1-a426-6defb4515f07/sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness.i[4494,4507] [2021-11-02 22:22:37,043 WARN L228 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_fa0de948-ca21-48c1-a426-6defb4515f07/sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness.i[4554,4567] [2021-11-02 22:22:37,045 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-02 22:22:37,046 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-02 22:22:37,097 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 22:22:37,098 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 22:22:37,098 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 22:22:37,099 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 22:22:37,100 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 22:22:37,109 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 22:22:37,110 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 22:22:37,111 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 22:22:37,112 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 22:22:37,114 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 22:22:37,115 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 22:22:37,116 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 22:22:37,116 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 22:22:37,163 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-02 22:22:37,165 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-02 22:22:37,166 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-02 22:22:37,167 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-02 22:22:37,169 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-02 22:22:37,169 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-02 22:22:37,170 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-02 22:22:37,171 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-02 22:22:37,172 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-02 22:22:37,172 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-02 22:22:37,205 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-02 22:22:37,240 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:22:37,520 INFO L208 MainTranslator]: Completed translation [2021-11-02 22:22:37,521 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:22:37 WrapperNode [2021-11-02 22:22:37,521 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 22:22:37,523 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-02 22:22:37,523 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-02 22:22:37,523 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-02 22:22:37,534 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:22:37" (1/1) ... [2021-11-02 22:22:37,672 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:22:37" (1/1) ... [2021-11-02 22:22:37,777 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-02 22:22:37,778 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 22:22:37,778 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 22:22:37,779 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 22:22:37,793 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:22:37" (1/1) ... [2021-11-02 22:22:37,793 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:22:37" (1/1) ... [2021-11-02 22:22:37,810 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:22:37" (1/1) ... [2021-11-02 22:22:37,816 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:22:37" (1/1) ... [2021-11-02 22:22:37,861 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:22:37" (1/1) ... [2021-11-02 22:22:37,875 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:22:37" (1/1) ... [2021-11-02 22:22:37,898 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:22:37" (1/1) ... [2021-11-02 22:22:37,906 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 22:22:37,907 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 22:22:37,907 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 22:22:37,907 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 22:22:37,910 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:22:37" (1/1) ... [2021-11-02 22:22:37,920 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:22:37,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0de948-ca21-48c1-a426-6defb4515f07/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:22:37,951 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0de948-ca21-48c1-a426-6defb4515f07/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-02 22:22:37,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0de948-ca21-48c1-a426-6defb4515f07/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-02 22:22:38,016 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-02 22:22:38,017 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-02 22:22:38,017 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-02 22:22:38,017 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 22:22:38,018 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 22:22:38,018 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 22:22:38,020 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-02 22:22:38,021 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-02 22:22:38,021 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-02 22:22:39,018 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 22:22:39,018 INFO L299 CfgBuilder]: Removed 55 assume(true) statements. [2021-11-02 22:22:39,021 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:22:39 BoogieIcfgContainer [2021-11-02 22:22:39,021 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 22:22:39,023 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 22:22:39,024 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 22:22:39,029 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 22:22:39,029 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 10:22:34" (1/3) ... [2021-11-02 22:22:39,030 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@282f6ba7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:22:39, skipping insertion in model container [2021-11-02 22:22:39,031 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:22:37" (2/3) ... [2021-11-02 22:22:39,031 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@282f6ba7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:22:39, skipping insertion in model container [2021-11-02 22:22:39,031 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:22:39" (3/3) ... [2021-11-02 22:22:39,033 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_linked_list_rend_harness.i [2021-11-02 22:22:39,040 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 22:22:39,040 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2021-11-02 22:22:39,105 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 22:22:39,113 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-02 22:22:39,114 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-11-02 22:22:39,138 INFO L276 IsEmpty]: Start isEmpty. Operand has 114 states, 109 states have (on average 1.5596330275229358) internal successors, (170), 113 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:22:39,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-02 22:22:39,148 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:22:39,149 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:22:39,150 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-02 22:22:39,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:22:39,158 INFO L85 PathProgramCache]: Analyzing trace with hash -122732205, now seen corresponding path program 1 times [2021-11-02 22:22:39,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:22:39,170 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457709920] [2021-11-02 22:22:39,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:22:39,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:22:39,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:22:39,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:22:39,642 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:22:39,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457709920] [2021-11-02 22:22:39,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457709920] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:22:39,644 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:22:39,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-02 22:22:39,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254142932] [2021-11-02 22:22:39,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-02 22:22:39,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:22:39,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-02 22:22:39,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-02 22:22:39,673 INFO L87 Difference]: Start difference. First operand has 114 states, 109 states have (on average 1.5596330275229358) internal successors, (170), 113 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 20.5) internal successors, (41), 2 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:22:39,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:22:39,710 INFO L93 Difference]: Finished difference Result 224 states and 335 transitions. [2021-11-02 22:22:39,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-02 22:22:39,712 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 20.5) internal successors, (41), 2 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-02 22:22:39,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:22:39,724 INFO L225 Difference]: With dead ends: 224 [2021-11-02 22:22:39,725 INFO L226 Difference]: Without dead ends: 109 [2021-11-02 22:22:39,729 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-02 22:22:39,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-11-02 22:22:39,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2021-11-02 22:22:39,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 105 states have (on average 1.457142857142857) internal successors, (153), 108 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:22:39,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 153 transitions. [2021-11-02 22:22:39,790 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 153 transitions. Word has length 41 [2021-11-02 22:22:39,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:22:39,791 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 153 transitions. [2021-11-02 22:22:39,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 20.5) internal successors, (41), 2 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:22:39,795 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 153 transitions. [2021-11-02 22:22:39,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-02 22:22:39,805 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:22:39,805 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:22:39,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-02 22:22:39,806 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-02 22:22:39,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:22:39,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1738897517, now seen corresponding path program 1 times [2021-11-02 22:22:39,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:22:39,815 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867365824] [2021-11-02 22:22:39,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:22:39,817 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:22:39,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:22:40,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:22:40,027 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:22:40,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867365824] [2021-11-02 22:22:40,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867365824] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:22:40,028 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:22:40,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 22:22:40,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381839868] [2021-11-02 22:22:40,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:22:40,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:22:40,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:22:40,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:22:40,033 INFO L87 Difference]: Start difference. First operand 109 states and 153 transitions. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:22:40,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:22:40,173 INFO L93 Difference]: Finished difference Result 208 states and 294 transitions. [2021-11-02 22:22:40,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:22:40,175 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-02 22:22:40,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:22:40,179 INFO L225 Difference]: With dead ends: 208 [2021-11-02 22:22:40,180 INFO L226 Difference]: Without dead ends: 109 [2021-11-02 22:22:40,182 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:22:40,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-11-02 22:22:40,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2021-11-02 22:22:40,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 105 states have (on average 1.4285714285714286) internal successors, (150), 108 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:22:40,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 150 transitions. [2021-11-02 22:22:40,206 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 150 transitions. Word has length 41 [2021-11-02 22:22:40,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:22:40,206 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 150 transitions. [2021-11-02 22:22:40,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:22:40,207 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 150 transitions. [2021-11-02 22:22:40,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-02 22:22:40,210 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:22:40,211 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:22:40,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-02 22:22:40,211 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-02 22:22:40,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:22:40,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1666510959, now seen corresponding path program 1 times [2021-11-02 22:22:40,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:22:40,217 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135169904] [2021-11-02 22:22:40,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:22:40,218 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:22:40,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:22:40,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:22:40,411 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:22:40,411 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135169904] [2021-11-02 22:22:40,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135169904] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:22:40,412 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:22:40,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 22:22:40,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998760429] [2021-11-02 22:22:40,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:22:40,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:22:40,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:22:40,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:22:40,415 INFO L87 Difference]: Start difference. First operand 109 states and 150 transitions. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:22:40,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:22:40,481 INFO L93 Difference]: Finished difference Result 210 states and 280 transitions. [2021-11-02 22:22:40,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:22:40,482 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-02 22:22:40,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:22:40,484 INFO L225 Difference]: With dead ends: 210 [2021-11-02 22:22:40,485 INFO L226 Difference]: Without dead ends: 127 [2021-11-02 22:22:40,486 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:22:40,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-11-02 22:22:40,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 109. [2021-11-02 22:22:40,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 105 states have (on average 1.4095238095238096) internal successors, (148), 108 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:22:40,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 148 transitions. [2021-11-02 22:22:40,500 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 148 transitions. Word has length 41 [2021-11-02 22:22:40,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:22:40,501 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 148 transitions. [2021-11-02 22:22:40,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:22:40,501 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 148 transitions. [2021-11-02 22:22:40,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-02 22:22:40,504 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:22:40,504 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:22:40,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-02 22:22:40,505 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-02 22:22:40,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:22:40,506 INFO L85 PathProgramCache]: Analyzing trace with hash -423042159, now seen corresponding path program 1 times [2021-11-02 22:22:40,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:22:40,506 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068440782] [2021-11-02 22:22:40,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:22:40,507 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:22:40,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:22:40,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:22:40,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:22:40,734 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068440782] [2021-11-02 22:22:40,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068440782] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:22:40,735 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:22:40,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 22:22:40,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011138807] [2021-11-02 22:22:40,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:22:40,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:22:40,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:22:40,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:22:40,738 INFO L87 Difference]: Start difference. First operand 109 states and 148 transitions. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:22:40,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:22:40,919 INFO L93 Difference]: Finished difference Result 217 states and 288 transitions. [2021-11-02 22:22:40,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 22:22:40,920 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-02 22:22:40,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:22:40,923 INFO L225 Difference]: With dead ends: 217 [2021-11-02 22:22:40,925 INFO L226 Difference]: Without dead ends: 135 [2021-11-02 22:22:40,926 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:22:40,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-11-02 22:22:40,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 109. [2021-11-02 22:22:40,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 105 states have (on average 1.380952380952381) internal successors, (145), 108 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:22:40,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 145 transitions. [2021-11-02 22:22:40,955 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 145 transitions. Word has length 45 [2021-11-02 22:22:40,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:22:40,956 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 145 transitions. [2021-11-02 22:22:40,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:22:40,957 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 145 transitions. [2021-11-02 22:22:40,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-02 22:22:40,963 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:22:40,964 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:22:40,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-02 22:22:40,970 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-02 22:22:40,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:22:40,971 INFO L85 PathProgramCache]: Analyzing trace with hash -2072078671, now seen corresponding path program 1 times [2021-11-02 22:22:40,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:22:40,972 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371425412] [2021-11-02 22:22:40,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:22:40,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:22:41,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:22:41,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:22:41,166 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:22:41,175 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371425412] [2021-11-02 22:22:41,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371425412] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:22:41,177 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:22:41,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-02 22:22:41,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089285320] [2021-11-02 22:22:41,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 22:22:41,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:22:41,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 22:22:41,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:22:41,180 INFO L87 Difference]: Start difference. First operand 109 states and 145 transitions. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:22:41,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:22:41,487 INFO L93 Difference]: Finished difference Result 296 states and 388 transitions. [2021-11-02 22:22:41,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 22:22:41,488 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-11-02 22:22:41,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:22:41,492 INFO L225 Difference]: With dead ends: 296 [2021-11-02 22:22:41,492 INFO L226 Difference]: Without dead ends: 213 [2021-11-02 22:22:41,501 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-02 22:22:41,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-11-02 22:22:41,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 112. [2021-11-02 22:22:41,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 108 states have (on average 1.3703703703703705) internal successors, (148), 111 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:22:41,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 148 transitions. [2021-11-02 22:22:41,521 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 148 transitions. Word has length 49 [2021-11-02 22:22:41,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:22:41,521 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 148 transitions. [2021-11-02 22:22:41,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:22:41,522 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 148 transitions. [2021-11-02 22:22:41,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-02 22:22:41,524 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:22:41,528 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:22:41,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-02 22:22:41,529 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-02 22:22:41,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:22:41,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1006498608, now seen corresponding path program 1 times [2021-11-02 22:22:41,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:22:41,531 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625446775] [2021-11-02 22:22:41,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:22:41,531 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:22:41,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:22:41,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:22:41,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:22:41,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625446775] [2021-11-02 22:22:41,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625446775] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:22:41,758 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:22:41,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-02 22:22:41,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533701833] [2021-11-02 22:22:41,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 22:22:41,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:22:41,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 22:22:41,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:22:41,763 INFO L87 Difference]: Start difference. First operand 112 states and 148 transitions. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:22:42,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:22:42,043 INFO L93 Difference]: Finished difference Result 299 states and 388 transitions. [2021-11-02 22:22:42,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 22:22:42,043 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-02 22:22:42,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:22:42,046 INFO L225 Difference]: With dead ends: 299 [2021-11-02 22:22:42,046 INFO L226 Difference]: Without dead ends: 214 [2021-11-02 22:22:42,048 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-02 22:22:42,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-11-02 22:22:42,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 115. [2021-11-02 22:22:42,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 111 states have (on average 1.3603603603603605) internal successors, (151), 114 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:22:42,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 151 transitions. [2021-11-02 22:22:42,079 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 151 transitions. Word has length 51 [2021-11-02 22:22:42,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:22:42,080 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 151 transitions. [2021-11-02 22:22:42,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:22:42,080 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 151 transitions. [2021-11-02 22:22:42,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-02 22:22:42,084 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:22:42,084 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:22:42,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-02 22:22:42,085 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-02 22:22:42,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:22:42,086 INFO L85 PathProgramCache]: Analyzing trace with hash 1179077135, now seen corresponding path program 1 times [2021-11-02 22:22:42,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:22:42,086 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974194569] [2021-11-02 22:22:42,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:22:42,087 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:22:42,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:22:42,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:22:42,239 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:22:42,240 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974194569] [2021-11-02 22:22:42,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974194569] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:22:42,240 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:22:42,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 22:22:42,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157555100] [2021-11-02 22:22:42,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:22:42,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:22:42,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:22:42,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:22:42,243 INFO L87 Difference]: Start difference. First operand 115 states and 151 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:22:42,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:22:42,355 INFO L93 Difference]: Finished difference Result 226 states and 298 transitions. [2021-11-02 22:22:42,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 22:22:42,357 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-02 22:22:42,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:22:42,358 INFO L225 Difference]: With dead ends: 226 [2021-11-02 22:22:42,359 INFO L226 Difference]: Without dead ends: 131 [2021-11-02 22:22:42,363 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:22:42,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-11-02 22:22:42,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 123. [2021-11-02 22:22:42,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 119 states have (on average 1.3361344537815125) internal successors, (159), 122 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:22:42,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 159 transitions. [2021-11-02 22:22:42,381 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 159 transitions. Word has length 61 [2021-11-02 22:22:42,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:22:42,384 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 159 transitions. [2021-11-02 22:22:42,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:22:42,385 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 159 transitions. [2021-11-02 22:22:42,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-02 22:22:42,392 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:22:42,392 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:22:42,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-02 22:22:42,393 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-02 22:22:42,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:22:42,394 INFO L85 PathProgramCache]: Analyzing trace with hash -192730163, now seen corresponding path program 1 times [2021-11-02 22:22:42,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:22:42,394 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974567741] [2021-11-02 22:22:42,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:22:42,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:22:42,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:22:42,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:22:42,564 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:22:42,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974567741] [2021-11-02 22:22:42,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974567741] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:22:42,571 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:22:42,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-02 22:22:42,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746832110] [2021-11-02 22:22:42,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 22:22:42,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:22:42,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 22:22:42,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:22:42,577 INFO L87 Difference]: Start difference. First operand 123 states and 159 transitions. Second operand has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 7 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:22:42,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:22:42,928 INFO L93 Difference]: Finished difference Result 324 states and 415 transitions. [2021-11-02 22:22:42,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-02 22:22:42,929 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 7 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-02 22:22:42,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:22:42,931 INFO L225 Difference]: With dead ends: 324 [2021-11-02 22:22:42,932 INFO L226 Difference]: Without dead ends: 221 [2021-11-02 22:22:42,933 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-02 22:22:42,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-11-02 22:22:42,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 126. [2021-11-02 22:22:42,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 122 states have (on average 1.3278688524590163) internal successors, (162), 125 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:22:42,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 162 transitions. [2021-11-02 22:22:42,942 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 162 transitions. Word has length 61 [2021-11-02 22:22:42,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:22:42,943 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 162 transitions. [2021-11-02 22:22:42,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 7 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:22:42,943 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 162 transitions. [2021-11-02 22:22:42,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-02 22:22:42,946 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:22:42,947 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:22:42,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-02 22:22:42,947 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-02 22:22:42,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:22:42,948 INFO L85 PathProgramCache]: Analyzing trace with hash 930930641, now seen corresponding path program 1 times [2021-11-02 22:22:42,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:22:42,949 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78096043] [2021-11-02 22:22:42,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:22:42,949 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:22:43,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:22:43,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:22:43,083 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:22:43,084 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78096043] [2021-11-02 22:22:43,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78096043] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:22:43,085 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:22:43,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 22:22:43,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258359446] [2021-11-02 22:22:43,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:22:43,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:22:43,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:22:43,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:22:43,088 INFO L87 Difference]: Start difference. First operand 126 states and 162 transitions. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:22:43,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:22:43,187 INFO L93 Difference]: Finished difference Result 269 states and 334 transitions. [2021-11-02 22:22:43,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 22:22:43,188 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-02 22:22:43,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:22:43,191 INFO L225 Difference]: With dead ends: 269 [2021-11-02 22:22:43,191 INFO L226 Difference]: Without dead ends: 172 [2021-11-02 22:22:43,192 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:22:43,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-11-02 22:22:43,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 126. [2021-11-02 22:22:43,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 122 states have (on average 1.3114754098360655) internal successors, (160), 125 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:22:43,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 160 transitions. [2021-11-02 22:22:43,201 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 160 transitions. Word has length 61 [2021-11-02 22:22:43,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:22:43,202 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 160 transitions. [2021-11-02 22:22:43,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:22:43,202 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 160 transitions. [2021-11-02 22:22:43,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-02 22:22:43,203 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:22:43,204 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:22:43,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-02 22:22:43,204 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-02 22:22:43,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:22:43,205 INFO L85 PathProgramCache]: Analyzing trace with hash -961072015, now seen corresponding path program 1 times [2021-11-02 22:22:43,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:22:43,206 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145927116] [2021-11-02 22:22:43,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:22:43,206 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:22:43,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:22:43,470 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 22:22:43,470 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:22:43,470 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145927116] [2021-11-02 22:22:43,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145927116] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:22:43,471 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721609979] [2021-11-02 22:22:43,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:22:43,472 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:22:43,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0de948-ca21-48c1-a426-6defb4515f07/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:22:43,474 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0de948-ca21-48c1-a426-6defb4515f07/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:22:43,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0de948-ca21-48c1-a426-6defb4515f07/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-02 22:22:43,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:22:43,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-02 22:22:43,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:22:43,938 INFO L354 Elim1Store]: treesize reduction 19, result has 50.0 percent of original size [2021-11-02 22:22:43,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 58 [2021-11-02 22:22:43,962 INFO L354 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2021-11-02 22:22:43,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 54 [2021-11-02 22:22:48,100 INFO L354 Elim1Store]: treesize reduction 20, result has 59.2 percent of original size [2021-11-02 22:22:48,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 94 treesize of output 89 [2021-11-02 22:22:48,139 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-02 22:22:48,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 89 [2021-11-02 22:22:48,337 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 22:22:48,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721609979] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:22:48,337 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:22:48,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 16 [2021-11-02 22:22:48,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162759161] [2021-11-02 22:22:48,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-02 22:22:48,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:22:48,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-02 22:22:48,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-11-02 22:22:48,340 INFO L87 Difference]: Start difference. First operand 126 states and 160 transitions. Second operand has 16 states, 16 states have (on average 5.5625) internal successors, (89), 16 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:23:39,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:23:39,729 INFO L93 Difference]: Finished difference Result 721 states and 891 transitions. [2021-11-02 22:23:39,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-11-02 22:23:39,730 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.5625) internal successors, (89), 16 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-02 22:23:39,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:23:39,736 INFO L225 Difference]: With dead ends: 721 [2021-11-02 22:23:39,737 INFO L226 Difference]: Without dead ends: 626 [2021-11-02 22:23:39,740 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1511 ImplicationChecksByTransitivity, 51.4s TimeCoverageRelationStatistics Valid=1122, Invalid=3848, Unknown=0, NotChecked=0, Total=4970 [2021-11-02 22:23:39,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2021-11-02 22:23:39,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 188. [2021-11-02 22:23:39,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 184 states have (on average 1.309782608695652) internal successors, (241), 187 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:23:39,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 241 transitions. [2021-11-02 22:23:39,771 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 241 transitions. Word has length 65 [2021-11-02 22:23:39,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:23:39,772 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 241 transitions. [2021-11-02 22:23:39,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.5625) internal successors, (89), 16 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:23:39,773 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 241 transitions. [2021-11-02 22:23:39,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-02 22:23:39,774 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:23:39,774 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:23:39,825 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0de948-ca21-48c1-a426-6defb4515f07/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-02 22:23:40,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0de948-ca21-48c1-a426-6defb4515f07/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-02 22:23:40,001 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-02 22:23:40,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:23:40,002 INFO L85 PathProgramCache]: Analyzing trace with hash 700473009, now seen corresponding path program 1 times [2021-11-02 22:23:40,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:23:40,002 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823027202] [2021-11-02 22:23:40,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:23:40,002 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:23:40,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:23:40,093 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 22:23:40,093 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:23:40,094 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823027202] [2021-11-02 22:23:40,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823027202] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:23:40,094 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:23:40,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 22:23:40,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908941630] [2021-11-02 22:23:40,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:23:40,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:23:40,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:23:40,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:23:40,096 INFO L87 Difference]: Start difference. First operand 188 states and 241 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:23:40,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:23:40,255 INFO L93 Difference]: Finished difference Result 359 states and 465 transitions. [2021-11-02 22:23:40,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 22:23:40,256 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-02 22:23:40,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:23:40,258 INFO L225 Difference]: With dead ends: 359 [2021-11-02 22:23:40,258 INFO L226 Difference]: Without dead ends: 200 [2021-11-02 22:23:40,259 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:23:40,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-11-02 22:23:40,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 188. [2021-11-02 22:23:40,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 184 states have (on average 1.2880434782608696) internal successors, (237), 187 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:23:40,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 237 transitions. [2021-11-02 22:23:40,284 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 237 transitions. Word has length 65 [2021-11-02 22:23:40,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:23:40,284 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 237 transitions. [2021-11-02 22:23:40,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:23:40,285 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 237 transitions. [2021-11-02 22:23:40,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-02 22:23:40,286 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:23:40,286 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:23:40,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-02 22:23:40,287 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-02 22:23:40,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:23:40,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1167005937, now seen corresponding path program 1 times [2021-11-02 22:23:40,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:23:40,288 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660185346] [2021-11-02 22:23:40,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:23:40,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:23:40,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:23:40,524 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 22:23:40,524 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:23:40,525 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660185346] [2021-11-02 22:23:40,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660185346] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:23:40,525 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:23:40,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-02 22:23:40,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546045560] [2021-11-02 22:23:40,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 22:23:40,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:23:40,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 22:23:40,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:23:40,527 INFO L87 Difference]: Start difference. First operand 188 states and 237 transitions. Second operand has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:23:40,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:23:40,952 INFO L93 Difference]: Finished difference Result 324 states and 414 transitions. [2021-11-02 22:23:40,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 22:23:40,953 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-02 22:23:40,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:23:40,954 INFO L225 Difference]: With dead ends: 324 [2021-11-02 22:23:40,954 INFO L226 Difference]: Without dead ends: 163 [2021-11-02 22:23:40,955 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-11-02 22:23:40,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-11-02 22:23:40,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 161. [2021-11-02 22:23:40,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 157 states have (on average 1.2929936305732483) internal successors, (203), 160 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:23:40,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 203 transitions. [2021-11-02 22:23:40,978 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 203 transitions. Word has length 65 [2021-11-02 22:23:40,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:23:40,979 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 203 transitions. [2021-11-02 22:23:40,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:23:40,979 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 203 transitions. [2021-11-02 22:23:40,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-02 22:23:40,980 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:23:40,981 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-02 22:23:40,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-02 22:23:40,981 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-02 22:23:40,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:23:40,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1164925684, now seen corresponding path program 1 times [2021-11-02 22:23:40,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:23:40,982 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164072977] [2021-11-02 22:23:40,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:23:40,983 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:23:41,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:23:41,401 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-02 22:23:41,402 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:23:41,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164072977] [2021-11-02 22:23:41,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164072977] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:23:41,402 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:23:41,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-02 22:23:41,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613506483] [2021-11-02 22:23:41,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-02 22:23:41,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:23:41,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-02 22:23:41,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-02 22:23:41,404 INFO L87 Difference]: Start difference. First operand 161 states and 203 transitions. Second operand has 9 states, 9 states have (on average 7.222222222222222) internal successors, (65), 9 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:23:42,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:23:42,049 INFO L93 Difference]: Finished difference Result 252 states and 317 transitions. [2021-11-02 22:23:42,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-02 22:23:42,050 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.222222222222222) internal successors, (65), 9 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-02 22:23:42,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:23:42,054 INFO L225 Difference]: With dead ends: 252 [2021-11-02 22:23:42,055 INFO L226 Difference]: Without dead ends: 204 [2021-11-02 22:23:42,055 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-11-02 22:23:42,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-11-02 22:23:42,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 164. [2021-11-02 22:23:42,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 160 states have (on average 1.2875) internal successors, (206), 163 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:23:42,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 206 transitions. [2021-11-02 22:23:42,083 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 206 transitions. Word has length 67 [2021-11-02 22:23:42,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:23:42,085 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 206 transitions. [2021-11-02 22:23:42,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.222222222222222) internal successors, (65), 9 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:23:42,085 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 206 transitions. [2021-11-02 22:23:42,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-02 22:23:42,086 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:23:42,087 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-02 22:23:42,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-02 22:23:42,087 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-02 22:23:42,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:23:42,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1166772726, now seen corresponding path program 1 times [2021-11-02 22:23:42,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:23:42,089 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119106943] [2021-11-02 22:23:42,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:23:42,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:23:42,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:23:42,410 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-02 22:23:42,410 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:23:42,410 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119106943] [2021-11-02 22:23:42,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119106943] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:23:42,411 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:23:42,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-02 22:23:42,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760148270] [2021-11-02 22:23:42,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-02 22:23:42,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:23:42,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-02 22:23:42,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-02 22:23:42,413 INFO L87 Difference]: Start difference. First operand 164 states and 206 transitions. Second operand has 9 states, 9 states have (on average 7.222222222222222) internal successors, (65), 9 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:23:42,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:23:42,923 INFO L93 Difference]: Finished difference Result 324 states and 409 transitions. [2021-11-02 22:23:42,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-02 22:23:42,924 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.222222222222222) internal successors, (65), 9 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-02 22:23:42,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:23:42,926 INFO L225 Difference]: With dead ends: 324 [2021-11-02 22:23:42,926 INFO L226 Difference]: Without dead ends: 176 [2021-11-02 22:23:42,927 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2021-11-02 22:23:42,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-11-02 22:23:42,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 172. [2021-11-02 22:23:42,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 168 states have (on average 1.2738095238095237) internal successors, (214), 171 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:23:42,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 214 transitions. [2021-11-02 22:23:42,953 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 214 transitions. Word has length 67 [2021-11-02 22:23:42,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:23:42,954 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 214 transitions. [2021-11-02 22:23:42,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.222222222222222) internal successors, (65), 9 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:23:42,954 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 214 transitions. [2021-11-02 22:23:42,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-02 22:23:42,955 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:23:42,955 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-02 22:23:42,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-02 22:23:42,956 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-02 22:23:42,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:23:42,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1353187208, now seen corresponding path program 1 times [2021-11-02 22:23:42,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:23:42,957 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628357485] [2021-11-02 22:23:42,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:23:42,958 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:23:43,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:23:43,426 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-02 22:23:43,427 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:23:43,427 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628357485] [2021-11-02 22:23:43,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628357485] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:23:43,427 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:23:43,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-02 22:23:43,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698035028] [2021-11-02 22:23:43,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-02 22:23:43,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:23:43,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-02 22:23:43,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-11-02 22:23:43,429 INFO L87 Difference]: Start difference. First operand 172 states and 214 transitions. Second operand has 12 states, 12 states have (on average 5.416666666666667) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:23:44,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:23:44,768 INFO L93 Difference]: Finished difference Result 558 states and 697 transitions. [2021-11-02 22:23:44,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-02 22:23:44,769 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.416666666666667) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-02 22:23:44,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:23:44,773 INFO L225 Difference]: With dead ends: 558 [2021-11-02 22:23:44,773 INFO L226 Difference]: Without dead ends: 437 [2021-11-02 22:23:44,777 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=224, Invalid=532, Unknown=0, NotChecked=0, Total=756 [2021-11-02 22:23:44,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2021-11-02 22:23:44,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 317. [2021-11-02 22:23:44,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 313 states have (on average 1.268370607028754) internal successors, (397), 316 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:23:44,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 397 transitions. [2021-11-02 22:23:44,863 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 397 transitions. Word has length 67 [2021-11-02 22:23:44,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:23:44,864 INFO L470 AbstractCegarLoop]: Abstraction has 317 states and 397 transitions. [2021-11-02 22:23:44,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.416666666666667) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:23:44,864 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 397 transitions. [2021-11-02 22:23:44,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-02 22:23:44,866 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:23:44,866 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-02 22:23:44,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-02 22:23:44,867 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-02 22:23:44,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:23:44,868 INFO L85 PathProgramCache]: Analyzing trace with hash -673128838, now seen corresponding path program 1 times [2021-11-02 22:23:44,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:23:44,868 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281877516] [2021-11-02 22:23:44,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:23:44,869 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:23:44,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:23:45,166 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 22:23:45,166 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:23:45,166 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281877516] [2021-11-02 22:23:45,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281877516] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:23:45,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141241656] [2021-11-02 22:23:45,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:23:45,167 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:23:45,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0de948-ca21-48c1-a426-6defb4515f07/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:23:45,173 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0de948-ca21-48c1-a426-6defb4515f07/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:23:45,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa0de948-ca21-48c1-a426-6defb4515f07/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-02 22:23:45,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:23:45,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 52 conjunts are in the unsatisfiable core [2021-11-02 22:23:45,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:23:45,561 INFO L354 Elim1Store]: treesize reduction 19, result has 50.0 percent of original size [2021-11-02 22:23:45,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 29 [2021-11-02 22:24:05,671 WARN L207 SmtUtils]: Spent 10.04 s on a formula simplification that was a NOOP. DAG size: 21 [2021-11-02 22:24:17,803 WARN L207 SmtUtils]: Spent 10.03 s on a formula simplification that was a NOOP. DAG size: 25 [2021-11-02 22:24:30,174 WARN L207 SmtUtils]: Spent 10.02 s on a formula simplification that was a NOOP. DAG size: 25 [2021-11-02 22:24:40,301 WARN L207 SmtUtils]: Spent 10.03 s on a formula simplification that was a NOOP. DAG size: 27 [2021-11-02 22:24:50,719 WARN L207 SmtUtils]: Spent 10.02 s on a formula simplification that was a NOOP. DAG size: 26 [2021-11-02 22:24:56,884 WARN L207 SmtUtils]: Spent 6.02 s on a formula simplification that was a NOOP. DAG size: 24 [2021-11-02 22:25:03,976 WARN L207 SmtUtils]: Spent 6.80 s on a formula simplification that was a NOOP. DAG size: 24 [2021-11-02 22:25:12,712 WARN L207 SmtUtils]: Spent 8.04 s on a formula simplification that was a NOOP. DAG size: 23 [2021-11-02 22:25:12,770 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 22:25:12,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141241656] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:25:12,771 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:25:12,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-11-02 22:25:12,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323244796] [2021-11-02 22:25:12,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-02 22:25:12,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:25:12,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-02 22:25:12,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=392, Unknown=7, NotChecked=0, Total=462 [2021-11-02 22:25:12,774 INFO L87 Difference]: Start difference. First operand 317 states and 397 transitions. Second operand has 22 states, 22 states have (on average 5.5) internal successors, (121), 22 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:35,170 WARN L207 SmtUtils]: Spent 10.02 s on a formula simplification that was a NOOP. DAG size: 23 [2021-11-02 22:25:47,287 WARN L207 SmtUtils]: Spent 10.04 s on a formula simplification that was a NOOP. DAG size: 27 [2021-11-02 22:25:57,418 WARN L207 SmtUtils]: Spent 10.04 s on a formula simplification that was a NOOP. DAG size: 31 [2021-11-02 22:26:17,526 WARN L207 SmtUtils]: Spent 20.08 s on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2021-11-02 22:26:27,711 WARN L207 SmtUtils]: Spent 10.04 s on a formula simplification that was a NOOP. DAG size: 34 [2021-11-02 22:26:45,819 WARN L207 SmtUtils]: Spent 18.06 s on a formula simplification. DAG size of input: 48 DAG size of output: 37 [2021-11-02 22:27:22,047 WARN L207 SmtUtils]: Spent 36.14 s on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2021-11-02 22:27:56,241 WARN L207 SmtUtils]: Spent 34.15 s on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2021-11-02 22:28:30,442 WARN L207 SmtUtils]: Spent 34.14 s on a formula simplification. DAG size of input: 64 DAG size of output: 53 [2021-11-02 22:29:08,652 WARN L207 SmtUtils]: Spent 38.12 s on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2021-11-02 22:29:44,849 WARN L207 SmtUtils]: Spent 36.17 s on a formula simplification. DAG size of input: 66 DAG size of output: 51 [2021-11-02 22:30:11,221 WARN L207 SmtUtils]: Spent 26.12 s on a formula simplification that was a NOOP. DAG size: 60 [2021-11-02 22:30:39,429 WARN L207 SmtUtils]: Spent 28.14 s on a formula simplification that was a NOOP. DAG size: 61 [2021-11-02 22:31:07,604 WARN L207 SmtUtils]: Spent 28.11 s on a formula simplification that was a NOOP. DAG size: 62 [2021-11-02 22:31:31,857 WARN L207 SmtUtils]: Spent 24.12 s on a formula simplification that was a NOOP. DAG size: 57 [2021-11-02 22:31:41,915 WARN L207 SmtUtils]: Spent 10.03 s on a formula simplification that was a NOOP. DAG size: 33 [2021-11-02 22:32:10,058 WARN L207 SmtUtils]: Spent 28.10 s on a formula simplification that was a NOOP. DAG size: 53 [2021-11-02 22:32:40,212 WARN L207 SmtUtils]: Spent 30.12 s on a formula simplification that was a NOOP. DAG size: 58 [2021-11-02 22:33:08,399 WARN L207 SmtUtils]: Spent 28.12 s on a formula simplification that was a NOOP. DAG size: 59 [2021-11-02 22:33:18,579 WARN L207 SmtUtils]: Spent 10.02 s on a formula simplification that was a NOOP. DAG size: 27 [2021-11-02 22:33:28,646 WARN L207 SmtUtils]: Spent 10.03 s on a formula simplification that was a NOOP. DAG size: 26 [2021-11-02 22:33:58,901 WARN L207 SmtUtils]: Spent 30.13 s on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2021-11-02 22:34:37,054 WARN L207 SmtUtils]: Spent 38.11 s on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2021-11-02 22:35:11,245 WARN L207 SmtUtils]: Spent 34.13 s on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2021-11-02 22:35:49,532 WARN L207 SmtUtils]: Spent 38.16 s on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2021-11-02 22:36:07,639 WARN L207 SmtUtils]: Spent 18.07 s on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2021-11-02 22:36:47,788 WARN L207 SmtUtils]: Spent 40.11 s on a formula simplification. DAG size of input: 61 DAG size of output: 49