./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_back_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_back_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash f57bc64edf303a057c8eafb48480d4e5b764bd411481261d53eb2a101eb82ae8 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 19:35:13,095 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 19:35:13,097 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 19:35:13,119 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 19:35:13,119 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 19:35:13,120 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 19:35:13,122 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 19:35:13,123 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 19:35:13,125 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 19:35:13,126 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 19:35:13,127 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 19:35:13,128 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 19:35:13,128 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 19:35:13,129 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 19:35:13,130 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 19:35:13,131 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 19:35:13,132 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 19:35:13,133 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 19:35:13,135 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 19:35:13,137 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 19:35:13,138 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 19:35:13,140 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 19:35:13,141 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 19:35:13,142 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 19:35:13,146 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 19:35:13,147 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 19:35:13,147 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 19:35:13,148 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 19:35:13,149 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 19:35:13,150 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 19:35:13,150 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 19:35:13,151 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 19:35:13,152 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 19:35:13,153 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 19:35:13,154 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 19:35:13,154 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 19:35:13,155 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 19:35:13,155 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 19:35:13,155 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 19:35:13,156 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 19:35:13,157 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 19:35:13,158 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-06 19:35:13,178 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 19:35:13,178 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 19:35:13,178 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 19:35:13,178 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 19:35:13,179 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 19:35:13,179 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 19:35:13,179 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 19:35:13,179 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 19:35:13,179 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 19:35:13,180 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 19:35:13,180 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 19:35:13,180 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 19:35:13,180 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 19:35:13,180 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 19:35:13,180 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 19:35:13,180 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 19:35:13,180 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 19:35:13,180 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 19:35:13,181 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 19:35:13,181 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 19:35:13,181 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 19:35:13,181 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 19:35:13,181 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 19:35:13,181 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 19:35:13,181 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 19:35:13,181 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 19:35:13,181 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 19:35:13,182 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 19:35:13,182 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 19:35:13,182 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 19:35:13,182 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 19:35:13,182 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_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f57bc64edf303a057c8eafb48480d4e5b764bd411481261d53eb2a101eb82ae8 [2021-12-06 19:35:13,352 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 19:35:13,369 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 19:35:13,371 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 19:35:13,376 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 19:35:13,377 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 19:35:13,378 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/aws-c-common/aws_linked_list_back_harness.i [2021-12-06 19:35:13,425 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa/data/2368060f3/5cce68ccba8c44a08373482754218e6b/FLAG3bce56bf6 [2021-12-06 19:35:13,930 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 19:35:13,930 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/sv-benchmarks/c/aws-c-common/aws_linked_list_back_harness.i [2021-12-06 19:35:13,955 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa/data/2368060f3/5cce68ccba8c44a08373482754218e6b/FLAG3bce56bf6 [2021-12-06 19:35:14,149 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa/data/2368060f3/5cce68ccba8c44a08373482754218e6b [2021-12-06 19:35:14,151 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 19:35:14,153 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 19:35:14,154 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 19:35:14,154 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 19:35:14,156 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 19:35:14,157 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 07:35:14" (1/1) ... [2021-12-06 19:35:14,158 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2331ab8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:35:14, skipping insertion in model container [2021-12-06 19:35:14,158 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 07:35:14" (1/1) ... [2021-12-06 19:35:14,163 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 19:35:14,224 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 19:35:14,396 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/sv-benchmarks/c/aws-c-common/aws_linked_list_back_harness.i[4494,4507] [2021-12-06 19:35:14,401 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/sv-benchmarks/c/aws-c-common/aws_linked_list_back_harness.i[4554,4567] [2021-12-06 19:35:14,918 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:35:14,919 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:35:14,919 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:35:14,920 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:35:14,920 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:35:14,930 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:35:14,931 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:35:14,932 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:35:14,933 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:35:14,934 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:35:14,935 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:35:14,935 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:35:14,935 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:35:15,197 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-06 19:35:15,198 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-06 19:35:15,199 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-06 19:35:15,200 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-06 19:35:15,201 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-06 19:35:15,202 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-06 19:35:15,202 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-06 19:35:15,203 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-06 19:35:15,203 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-06 19:35:15,204 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-06 19:35:15,328 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-06 19:35:15,345 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 19:35:15,357 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 19:35:15,367 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/sv-benchmarks/c/aws-c-common/aws_linked_list_back_harness.i[4494,4507] [2021-12-06 19:35:15,367 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/sv-benchmarks/c/aws-c-common/aws_linked_list_back_harness.i[4554,4567] [2021-12-06 19:35:15,395 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:35:15,395 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:35:15,395 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:35:15,396 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:35:15,396 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:35:15,402 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:35:15,402 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:35:15,403 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:35:15,403 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:35:15,404 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:35:15,405 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:35:15,405 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:35:15,405 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:35:15,431 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-06 19:35:15,432 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-06 19:35:15,432 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-06 19:35:15,433 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-06 19:35:15,434 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-06 19:35:15,434 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-06 19:35:15,434 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-06 19:35:15,435 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-06 19:35:15,435 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-06 19:35:15,436 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-06 19:35:15,463 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-06 19:35:15,473 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 19:35:15,627 INFO L208 MainTranslator]: Completed translation [2021-12-06 19:35:15,628 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:35:15 WrapperNode [2021-12-06 19:35:15,628 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 19:35:15,629 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 19:35:15,629 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 19:35:15,629 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 19:35:15,634 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:35:15" (1/1) ... [2021-12-06 19:35:15,687 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:35:15" (1/1) ... [2021-12-06 19:35:15,716 INFO L137 Inliner]: procedures = 679, calls = 1045, calls flagged for inlining = 50, calls inlined = 5, statements flattened = 134 [2021-12-06 19:35:15,716 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 19:35:15,717 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 19:35:15,717 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 19:35:15,717 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 19:35:15,723 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:35:15" (1/1) ... [2021-12-06 19:35:15,723 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:35:15" (1/1) ... [2021-12-06 19:35:15,727 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:35:15" (1/1) ... [2021-12-06 19:35:15,727 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:35:15" (1/1) ... [2021-12-06 19:35:15,738 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:35:15" (1/1) ... [2021-12-06 19:35:15,742 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:35:15" (1/1) ... [2021-12-06 19:35:15,745 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:35:15" (1/1) ... [2021-12-06 19:35:15,750 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 19:35:15,751 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 19:35:15,751 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 19:35:15,751 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 19:35:15,752 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:35:15" (1/1) ... [2021-12-06 19:35:15,759 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 19:35:15,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:35:15,782 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 19:35:15,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 19:35:15,812 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_back [2021-12-06 19:35:15,812 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_back [2021-12-06 19:35:15,812 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-06 19:35:15,812 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-06 19:35:15,812 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-06 19:35:15,813 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2021-12-06 19:35:15,813 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2021-12-06 19:35:15,813 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-06 19:35:15,813 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2021-12-06 19:35:15,813 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2021-12-06 19:35:15,813 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 19:35:15,813 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-06 19:35:15,813 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 19:35:15,813 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 19:35:15,813 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_empty [2021-12-06 19:35:15,813 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_empty [2021-12-06 19:35:15,813 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-06 19:35:15,814 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-06 19:35:15,814 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-06 19:35:15,814 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-06 19:35:15,814 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-06 19:35:15,814 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-12-06 19:35:15,814 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-12-06 19:35:15,814 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_prev_is_valid [2021-12-06 19:35:15,814 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_prev_is_valid [2021-12-06 19:35:15,814 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 19:35:15,983 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 19:35:15,984 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 19:35:16,158 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 19:35:16,163 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 19:35:16,164 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-06 19:35:16,165 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 07:35:16 BoogieIcfgContainer [2021-12-06 19:35:16,165 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 19:35:16,166 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 19:35:16,166 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 19:35:16,169 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 19:35:16,169 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 07:35:14" (1/3) ... [2021-12-06 19:35:16,169 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22d740e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 07:35:16, skipping insertion in model container [2021-12-06 19:35:16,169 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:35:15" (2/3) ... [2021-12-06 19:35:16,170 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22d740e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 07:35:16, skipping insertion in model container [2021-12-06 19:35:16,170 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 07:35:16" (3/3) ... [2021-12-06 19:35:16,171 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_linked_list_back_harness.i [2021-12-06 19:35:16,174 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 19:35:16,175 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 19:35:16,208 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 19:35:16,213 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 [2021-12-06 19:35:16,213 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 19:35:16,227 INFO L276 IsEmpty]: Start isEmpty. Operand has 98 states, 64 states have (on average 1.296875) internal successors, (83), 65 states have internal predecessors, (83), 24 states have call successors, (24), 8 states have call predecessors, (24), 8 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-12-06 19:35:16,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-06 19:35:16,233 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:35:16,233 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:35:16,234 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:35:16,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:35:16,238 INFO L85 PathProgramCache]: Analyzing trace with hash 464723229, now seen corresponding path program 1 times [2021-12-06 19:35:16,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:35:16,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472012371] [2021-12-06 19:35:16,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:35:16,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:35:16,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:16,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 19:35:16,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:16,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:35:16,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:16,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 19:35:16,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:16,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 19:35:16,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:16,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-06 19:35:16,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:16,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-06 19:35:16,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:16,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-06 19:35:16,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:16,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-06 19:35:16,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:16,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 19:35:16,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:16,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-06 19:35:16,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:16,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-06 19:35:16,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:16,611 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-12-06 19:35:16,612 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:35:16,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472012371] [2021-12-06 19:35:16,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472012371] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:35:16,613 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:35:16,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 19:35:16,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040697876] [2021-12-06 19:35:16,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:35:16,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 19:35:16,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:35:16,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 19:35:16,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 19:35:16,649 INFO L87 Difference]: Start difference. First operand has 98 states, 64 states have (on average 1.296875) internal successors, (83), 65 states have internal predecessors, (83), 24 states have call successors, (24), 8 states have call predecessors, (24), 8 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Second operand has 2 states, 2 states have (on average 16.0) internal successors, (32), 2 states have internal predecessors, (32), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-06 19:35:16,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:35:16,684 INFO L93 Difference]: Finished difference Result 188 states and 271 transitions. [2021-12-06 19:35:16,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 19:35:16,686 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 16.0) internal successors, (32), 2 states have internal predecessors, (32), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 84 [2021-12-06 19:35:16,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:35:16,692 INFO L225 Difference]: With dead ends: 188 [2021-12-06 19:35:16,692 INFO L226 Difference]: Without dead ends: 93 [2021-12-06 19:35:16,696 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 19:35:16,698 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:35:16,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:35:16,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-12-06 19:35:16,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2021-12-06 19:35:16,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 60 states have (on average 1.25) internal successors, (75), 61 states have internal predecessors, (75), 24 states have call successors, (24), 8 states have call predecessors, (24), 8 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2021-12-06 19:35:16,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 122 transitions. [2021-12-06 19:35:16,734 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 122 transitions. Word has length 84 [2021-12-06 19:35:16,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:35:16,734 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 122 transitions. [2021-12-06 19:35:16,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 16.0) internal successors, (32), 2 states have internal predecessors, (32), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-06 19:35:16,735 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 122 transitions. [2021-12-06 19:35:16,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-06 19:35:16,738 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:35:16,738 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:35:16,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 19:35:16,739 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:35:16,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:35:16,739 INFO L85 PathProgramCache]: Analyzing trace with hash 463621205, now seen corresponding path program 1 times [2021-12-06 19:35:16,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:35:16,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698057523] [2021-12-06 19:35:16,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:35:16,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:35:16,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:16,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 19:35:16,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:16,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:35:16,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:16,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 19:35:16,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:16,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 19:35:16,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:16,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-06 19:35:16,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:16,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-06 19:35:16,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:16,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-06 19:35:16,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:17,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-06 19:35:17,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:17,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 19:35:17,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:17,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-06 19:35:17,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:17,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-06 19:35:17,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:17,041 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-12-06 19:35:17,041 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:35:17,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698057523] [2021-12-06 19:35:17,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698057523] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:35:17,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79271796] [2021-12-06 19:35:17,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:35:17,042 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:35:17,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:35:17,044 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:35:17,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 19:35:17,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:17,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 50 conjunts are in the unsatisfiable core [2021-12-06 19:35:17,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:35:17,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:35:17,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2021-12-06 19:35:17,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:35:17,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2021-12-06 19:35:17,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:35:17,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:35:17,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:35:17,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 29 [2021-12-06 19:35:17,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:35:17,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:35:17,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:35:17,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 29 [2021-12-06 19:35:18,183 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-12-06 19:35:18,183 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:35:18,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79271796] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:35:18,183 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:35:18,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [6] total 15 [2021-12-06 19:35:18,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391569139] [2021-12-06 19:35:18,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:35:18,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-06 19:35:18,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:35:18,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-06 19:35:18,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-12-06 19:35:18,187 INFO L87 Difference]: Start difference. First operand 93 states and 122 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 5 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-06 19:35:18,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:35:18,293 INFO L93 Difference]: Finished difference Result 201 states and 273 transitions. [2021-12-06 19:35:18,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-06 19:35:18,294 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 5 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 84 [2021-12-06 19:35:18,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:35:18,298 INFO L225 Difference]: With dead ends: 201 [2021-12-06 19:35:18,299 INFO L226 Difference]: Without dead ends: 142 [2021-12-06 19:35:18,300 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 85 SyntacticMatches, 12 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-12-06 19:35:18,301 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 31 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 554 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:35:18,302 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 554 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 50 Invalid, 0 Unknown, 73 Unchecked, 0.1s Time] [2021-12-06 19:35:18,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-12-06 19:35:18,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 131. [2021-12-06 19:35:18,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 85 states have (on average 1.2588235294117647) internal successors, (107), 88 states have internal predecessors, (107), 33 states have call successors, (33), 12 states have call predecessors, (33), 12 states have return successors, (35), 30 states have call predecessors, (35), 32 states have call successors, (35) [2021-12-06 19:35:18,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 175 transitions. [2021-12-06 19:35:18,323 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 175 transitions. Word has length 84 [2021-12-06 19:35:18,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:35:18,324 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 175 transitions. [2021-12-06 19:35:18,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 5 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-06 19:35:18,325 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 175 transitions. [2021-12-06 19:35:18,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-06 19:35:18,328 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:35:18,328 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:35:18,350 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 19:35:18,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:35:18,530 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:35:18,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:35:18,532 INFO L85 PathProgramCache]: Analyzing trace with hash -345725421, now seen corresponding path program 1 times [2021-12-06 19:35:18,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:35:18,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455115576] [2021-12-06 19:35:18,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:35:18,533 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:35:18,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:18,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 19:35:18,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:18,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:35:18,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:18,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 19:35:18,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:18,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 19:35:18,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:18,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-06 19:35:18,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:18,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-06 19:35:18,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:18,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-06 19:35:18,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:18,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-06 19:35:18,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:18,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 19:35:18,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:18,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-06 19:35:18,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:18,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-06 19:35:18,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:18,756 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-12-06 19:35:18,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:35:18,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455115576] [2021-12-06 19:35:18,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455115576] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:35:18,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007979735] [2021-12-06 19:35:18,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:35:18,758 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:35:18,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:35:18,759 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:35:18,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 19:35:18,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:18,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 53 conjunts are in the unsatisfiable core [2021-12-06 19:35:18,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:35:18,926 INFO L354 Elim1Store]: treesize reduction 30, result has 38.8 percent of original size [2021-12-06 19:35:18,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 55 [2021-12-06 19:35:18,936 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 19:35:18,937 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 9 treesize of output 15 [2021-12-06 19:35:18,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-12-06 19:35:18,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-12-06 19:35:19,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-12-06 19:35:19,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 19:35:19,385 INFO L354 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2021-12-06 19:35:19,385 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 25 [2021-12-06 19:35:19,751 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 20 proven. 40 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-06 19:35:19,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:35:20,226 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:35:20,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 118 treesize of output 120 [2021-12-06 19:35:20,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 136 [2021-12-06 19:35:20,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 63 [2021-12-06 19:35:20,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 58 [2021-12-06 19:35:20,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 50 [2021-12-06 19:35:20,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 46 [2021-12-06 19:35:20,427 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-06 19:35:20,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007979735] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:35:20,427 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:35:20,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 18, 16] total 35 [2021-12-06 19:35:20,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515024689] [2021-12-06 19:35:20,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:35:20,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-06 19:35:20,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:35:20,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-06 19:35:20,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1077, Unknown=0, NotChecked=0, Total=1190 [2021-12-06 19:35:20,430 INFO L87 Difference]: Start difference. First operand 131 states and 175 transitions. Second operand has 35 states, 32 states have (on average 3.375) internal successors, (108), 32 states have internal predecessors, (108), 12 states have call successors, (32), 6 states have call predecessors, (32), 9 states have return successors, (28), 10 states have call predecessors, (28), 12 states have call successors, (28) [2021-12-06 19:35:21,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:35:21,456 INFO L93 Difference]: Finished difference Result 367 states and 507 transitions. [2021-12-06 19:35:21,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-12-06 19:35:21,457 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 32 states have (on average 3.375) internal successors, (108), 32 states have internal predecessors, (108), 12 states have call successors, (32), 6 states have call predecessors, (32), 9 states have return successors, (28), 10 states have call predecessors, (28), 12 states have call successors, (28) Word has length 84 [2021-12-06 19:35:21,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:35:21,460 INFO L225 Difference]: With dead ends: 367 [2021-12-06 19:35:21,461 INFO L226 Difference]: Without dead ends: 232 [2021-12-06 19:35:21,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 155 SyntacticMatches, 11 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 761 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=262, Invalid=2930, Unknown=0, NotChecked=0, Total=3192 [2021-12-06 19:35:21,465 INFO L933 BasicCegarLoop]: 174 mSDtfsCounter, 206 mSDsluCounter, 2881 mSDsCounter, 0 mSdLazyCounter, 1035 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 3055 SdHoareTripleChecker+Invalid, 1552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1035 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 434 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 19:35:21,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 3055 Invalid, 1552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1035 Invalid, 0 Unknown, 434 Unchecked, 0.6s Time] [2021-12-06 19:35:21,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-12-06 19:35:21,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 197. [2021-12-06 19:35:21,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 141 states have (on average 1.3049645390070923) internal successors, (184), 144 states have internal predecessors, (184), 37 states have call successors, (37), 18 states have call predecessors, (37), 18 states have return successors, (47), 34 states have call predecessors, (47), 36 states have call successors, (47) [2021-12-06 19:35:21,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 268 transitions. [2021-12-06 19:35:21,496 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 268 transitions. Word has length 84 [2021-12-06 19:35:21,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:35:21,497 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 268 transitions. [2021-12-06 19:35:21,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 32 states have (on average 3.375) internal successors, (108), 32 states have internal predecessors, (108), 12 states have call successors, (32), 6 states have call predecessors, (32), 9 states have return successors, (28), 10 states have call predecessors, (28), 12 states have call successors, (28) [2021-12-06 19:35:21,497 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 268 transitions. [2021-12-06 19:35:21,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-12-06 19:35:21,500 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:35:21,501 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:35:21,521 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 19:35:21,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:35:21,702 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:35:21,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:35:21,704 INFO L85 PathProgramCache]: Analyzing trace with hash -583798319, now seen corresponding path program 1 times [2021-12-06 19:35:21,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:35:21,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849828966] [2021-12-06 19:35:21,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:35:21,705 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:35:21,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:21,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 19:35:21,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:21,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:35:21,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:21,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 19:35:21,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:21,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 19:35:21,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:21,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-06 19:35:21,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:21,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-06 19:35:21,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:21,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-06 19:35:21,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:21,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-06 19:35:21,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:21,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 19:35:21,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:21,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-06 19:35:21,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:21,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-06 19:35:21,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:21,933 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-06 19:35:21,933 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:35:21,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849828966] [2021-12-06 19:35:21,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849828966] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:35:21,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704043421] [2021-12-06 19:35:21,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:35:21,934 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:35:21,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:35:21,935 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:35:21,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 19:35:22,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:22,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-06 19:35:22,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:35:22,148 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-06 19:35:22,148 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:35:22,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704043421] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:35:22,148 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:35:22,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 15 [2021-12-06 19:35:22,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676028350] [2021-12-06 19:35:22,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:35:22,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 19:35:22,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:35:22,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 19:35:22,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-12-06 19:35:22,150 INFO L87 Difference]: Start difference. First operand 197 states and 268 transitions. Second operand has 9 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-12-06 19:35:22,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:35:22,327 INFO L93 Difference]: Finished difference Result 334 states and 466 transitions. [2021-12-06 19:35:22,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 19:35:22,328 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 86 [2021-12-06 19:35:22,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:35:22,329 INFO L225 Difference]: With dead ends: 334 [2021-12-06 19:35:22,330 INFO L226 Difference]: Without dead ends: 199 [2021-12-06 19:35:22,331 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-12-06 19:35:22,331 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 149 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 548 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:35:22,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 548 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 19:35:22,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-12-06 19:35:22,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 197. [2021-12-06 19:35:22,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 141 states have (on average 1.2765957446808511) internal successors, (180), 144 states have internal predecessors, (180), 37 states have call successors, (37), 18 states have call predecessors, (37), 18 states have return successors, (47), 34 states have call predecessors, (47), 36 states have call successors, (47) [2021-12-06 19:35:22,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 264 transitions. [2021-12-06 19:35:22,352 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 264 transitions. Word has length 86 [2021-12-06 19:35:22,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:35:22,352 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 264 transitions. [2021-12-06 19:35:22,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-12-06 19:35:22,353 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 264 transitions. [2021-12-06 19:35:22,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-12-06 19:35:22,355 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:35:22,355 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:35:22,385 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 19:35:22,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:35:22,555 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:35:22,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:35:22,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1801781246, now seen corresponding path program 1 times [2021-12-06 19:35:22,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:35:22,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956151740] [2021-12-06 19:35:22,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:35:22,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:35:22,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:22,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 19:35:22,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:22,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:35:22,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:22,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 19:35:22,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:22,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 19:35:22,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:22,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-06 19:35:22,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:22,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-06 19:35:22,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:22,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-06 19:35:22,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:22,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-06 19:35:22,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:22,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 19:35:22,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:22,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-06 19:35:22,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:22,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-06 19:35:22,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:22,718 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-12-06 19:35:22,718 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:35:22,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956151740] [2021-12-06 19:35:22,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956151740] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:35:22,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767972199] [2021-12-06 19:35:22,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:35:22,719 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:35:22,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:35:22,719 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:35:22,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 19:35:22,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:22,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-06 19:35:22,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:35:22,959 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-06 19:35:22,959 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:35:22,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767972199] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:35:22,960 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:35:22,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 14 [2021-12-06 19:35:22,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178858772] [2021-12-06 19:35:22,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:35:22,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 19:35:22,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:35:22,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 19:35:22,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2021-12-06 19:35:22,961 INFO L87 Difference]: Start difference. First operand 197 states and 264 transitions. Second operand has 10 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-12-06 19:35:23,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:35:23,164 INFO L93 Difference]: Finished difference Result 362 states and 508 transitions. [2021-12-06 19:35:23,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 19:35:23,165 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 88 [2021-12-06 19:35:23,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:35:23,167 INFO L225 Difference]: With dead ends: 362 [2021-12-06 19:35:23,167 INFO L226 Difference]: Without dead ends: 223 [2021-12-06 19:35:23,168 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-12-06 19:35:23,169 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 185 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 613 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:35:23,169 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 613 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 19:35:23,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-12-06 19:35:23,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 200. [2021-12-06 19:35:23,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 144 states have (on average 1.2638888888888888) internal successors, (182), 147 states have internal predecessors, (182), 37 states have call successors, (37), 18 states have call predecessors, (37), 18 states have return successors, (47), 34 states have call predecessors, (47), 36 states have call successors, (47) [2021-12-06 19:35:23,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 266 transitions. [2021-12-06 19:35:23,188 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 266 transitions. Word has length 88 [2021-12-06 19:35:23,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:35:23,189 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 266 transitions. [2021-12-06 19:35:23,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-12-06 19:35:23,189 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 266 transitions. [2021-12-06 19:35:23,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-12-06 19:35:23,191 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:35:23,191 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:35:23,211 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 19:35:23,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:35:23,392 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:35:23,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:35:23,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1442434984, now seen corresponding path program 1 times [2021-12-06 19:35:23,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:35:23,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237295731] [2021-12-06 19:35:23,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:35:23,395 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:35:23,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:23,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 19:35:23,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:23,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:35:23,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:23,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 19:35:23,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:23,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 19:35:23,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:23,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-06 19:35:23,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:23,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-06 19:35:23,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:23,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 19:35:23,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:23,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-06 19:35:23,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:23,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 19:35:23,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:23,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-06 19:35:23,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:23,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-06 19:35:23,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:23,577 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-12-06 19:35:23,577 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:35:23,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237295731] [2021-12-06 19:35:23,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237295731] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:35:23,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994625514] [2021-12-06 19:35:23,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:35:23,578 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:35:23,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:35:23,579 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:35:23,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 19:35:23,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:23,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 19:35:23,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:35:23,736 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-06 19:35:23,736 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:35:23,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994625514] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:35:23,736 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:35:23,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-12-06 19:35:23,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639586411] [2021-12-06 19:35:23,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:35:23,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:35:23,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:35:23,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:35:23,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-06 19:35:23,737 INFO L87 Difference]: Start difference. First operand 200 states and 266 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-06 19:35:23,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:35:23,753 INFO L93 Difference]: Finished difference Result 321 states and 452 transitions. [2021-12-06 19:35:23,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:35:23,754 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 89 [2021-12-06 19:35:23,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:35:23,755 INFO L225 Difference]: With dead ends: 321 [2021-12-06 19:35:23,755 INFO L226 Difference]: Without dead ends: 191 [2021-12-06 19:35:23,756 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-06 19:35:23,757 INFO L933 BasicCegarLoop]: 121 mSDtfsCounter, 4 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:35:23,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 237 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:35:23,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-12-06 19:35:23,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 153. [2021-12-06 19:35:23,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 108 states have (on average 1.2592592592592593) internal successors, (136), 109 states have internal predecessors, (136), 31 states have call successors, (31), 15 states have call predecessors, (31), 13 states have return successors, (32), 28 states have call predecessors, (32), 30 states have call successors, (32) [2021-12-06 19:35:23,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 199 transitions. [2021-12-06 19:35:23,768 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 199 transitions. Word has length 89 [2021-12-06 19:35:23,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:35:23,768 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 199 transitions. [2021-12-06 19:35:23,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-06 19:35:23,768 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 199 transitions. [2021-12-06 19:35:23,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-12-06 19:35:23,769 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:35:23,769 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:35:23,799 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-06 19:35:23,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:35:23,971 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:35:23,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:35:23,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1174325196, now seen corresponding path program 1 times [2021-12-06 19:35:23,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:35:23,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036361681] [2021-12-06 19:35:23,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:35:23,973 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:35:24,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:24,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 19:35:24,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:24,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:35:24,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:24,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 19:35:24,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:24,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 19:35:24,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:24,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-06 19:35:24,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:24,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-06 19:35:24,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:24,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 19:35:24,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:24,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-06 19:35:24,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:24,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-06 19:35:24,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:24,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 19:35:24,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:24,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-06 19:35:24,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:24,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-06 19:35:24,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:24,262 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-06 19:35:24,263 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:35:24,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036361681] [2021-12-06 19:35:24,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036361681] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:35:24,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76378037] [2021-12-06 19:35:24,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:35:24,263 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:35:24,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:35:24,264 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:35:24,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 19:35:24,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:24,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-06 19:35:24,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:35:24,568 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-06 19:35:24,568 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:35:24,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76378037] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:35:24,569 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:35:24,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [7] total 15 [2021-12-06 19:35:24,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216331953] [2021-12-06 19:35:24,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:35:24,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-06 19:35:24,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:35:24,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-06 19:35:24,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2021-12-06 19:35:24,570 INFO L87 Difference]: Start difference. First operand 153 states and 199 transitions. Second operand has 13 states, 11 states have (on average 5.818181818181818) internal successors, (64), 10 states have internal predecessors, (64), 5 states have call successors, (14), 3 states have call predecessors, (14), 5 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-12-06 19:35:24,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:35:24,804 INFO L93 Difference]: Finished difference Result 249 states and 330 transitions. [2021-12-06 19:35:24,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 19:35:24,804 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 5.818181818181818) internal successors, (64), 10 states have internal predecessors, (64), 5 states have call successors, (14), 3 states have call predecessors, (14), 5 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 99 [2021-12-06 19:35:24,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:35:24,806 INFO L225 Difference]: With dead ends: 249 [2021-12-06 19:35:24,806 INFO L226 Difference]: Without dead ends: 161 [2021-12-06 19:35:24,806 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2021-12-06 19:35:24,807 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 110 mSDsluCounter, 858 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 948 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 19:35:24,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 948 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 19:35:24,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-12-06 19:35:24,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 153. [2021-12-06 19:35:24,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 108 states have (on average 1.2592592592592593) internal successors, (136), 109 states have internal predecessors, (136), 31 states have call successors, (31), 15 states have call predecessors, (31), 13 states have return successors, (32), 28 states have call predecessors, (32), 30 states have call successors, (32) [2021-12-06 19:35:24,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 199 transitions. [2021-12-06 19:35:24,818 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 199 transitions. Word has length 99 [2021-12-06 19:35:24,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:35:24,818 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 199 transitions. [2021-12-06 19:35:24,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 5.818181818181818) internal successors, (64), 10 states have internal predecessors, (64), 5 states have call successors, (14), 3 states have call predecessors, (14), 5 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-12-06 19:35:24,819 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 199 transitions. [2021-12-06 19:35:24,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-12-06 19:35:24,820 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:35:24,820 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:35:24,846 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 19:35:25,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:35:25,021 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:35:25,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:35:25,022 INFO L85 PathProgramCache]: Analyzing trace with hash 26119479, now seen corresponding path program 1 times [2021-12-06 19:35:25,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:35:25,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947851675] [2021-12-06 19:35:25,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:35:25,022 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:35:25,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:25,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 19:35:25,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:25,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:35:25,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:25,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 19:35:25,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:25,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 19:35:25,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:25,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-06 19:35:25,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:25,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-06 19:35:25,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:25,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 19:35:25,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:25,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-06 19:35:25,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:25,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-06 19:35:25,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:25,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 19:35:25,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:25,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-06 19:35:25,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:25,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-06 19:35:25,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:25,204 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-12-06 19:35:25,204 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:35:25,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947851675] [2021-12-06 19:35:25,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947851675] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:35:25,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379236328] [2021-12-06 19:35:25,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:35:25,204 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:35:25,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:35:25,205 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:35:25,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 19:35:25,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:25,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 59 conjunts are in the unsatisfiable core [2021-12-06 19:35:25,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:35:25,356 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 19:35:25,356 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 9 treesize of output 15 [2021-12-06 19:35:25,364 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 19:35:25,365 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 9 treesize of output 15 [2021-12-06 19:35:26,005 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 43 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-06 19:35:26,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:35:26,441 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-06 19:35:26,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379236328] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:35:26,442 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:35:26,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 17, 12] total 32 [2021-12-06 19:35:26,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828571541] [2021-12-06 19:35:26,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:35:26,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-06 19:35:26,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:35:26,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-06 19:35:26,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=896, Unknown=0, NotChecked=0, Total=992 [2021-12-06 19:35:26,443 INFO L87 Difference]: Start difference. First operand 153 states and 199 transitions. Second operand has 32 states, 31 states have (on average 3.967741935483871) internal successors, (123), 31 states have internal predecessors, (123), 11 states have call successors, (30), 4 states have call predecessors, (30), 6 states have return successors, (28), 10 states have call predecessors, (28), 11 states have call successors, (28) [2021-12-06 19:35:27,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:35:27,477 INFO L93 Difference]: Finished difference Result 388 states and 567 transitions. [2021-12-06 19:35:27,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-06 19:35:27,478 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 3.967741935483871) internal successors, (123), 31 states have internal predecessors, (123), 11 states have call successors, (30), 4 states have call predecessors, (30), 6 states have return successors, (28), 10 states have call predecessors, (28), 11 states have call successors, (28) Word has length 99 [2021-12-06 19:35:27,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:35:27,480 INFO L225 Difference]: With dead ends: 388 [2021-12-06 19:35:27,480 INFO L226 Difference]: Without dead ends: 292 [2021-12-06 19:35:27,481 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 205 SyntacticMatches, 14 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=329, Invalid=2323, Unknown=0, NotChecked=0, Total=2652 [2021-12-06 19:35:27,482 INFO L933 BasicCegarLoop]: 159 mSDtfsCounter, 373 mSDsluCounter, 2003 mSDsCounter, 0 mSdLazyCounter, 827 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 2162 SdHoareTripleChecker+Invalid, 1194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 827 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 232 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 19:35:27,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [396 Valid, 2162 Invalid, 1194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 827 Invalid, 0 Unknown, 232 Unchecked, 0.4s Time] [2021-12-06 19:35:27,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-12-06 19:35:27,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 224. [2021-12-06 19:35:27,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 164 states have (on average 1.2926829268292683) internal successors, (212), 167 states have internal predecessors, (212), 41 states have call successors, (41), 18 states have call predecessors, (41), 18 states have return successors, (54), 38 states have call predecessors, (54), 40 states have call successors, (54) [2021-12-06 19:35:27,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 307 transitions. [2021-12-06 19:35:27,498 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 307 transitions. Word has length 99 [2021-12-06 19:35:27,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:35:27,498 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 307 transitions. [2021-12-06 19:35:27,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 3.967741935483871) internal successors, (123), 31 states have internal predecessors, (123), 11 states have call successors, (30), 4 states have call predecessors, (30), 6 states have return successors, (28), 10 states have call predecessors, (28), 11 states have call successors, (28) [2021-12-06 19:35:27,498 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 307 transitions. [2021-12-06 19:35:27,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-06 19:35:27,499 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:35:27,500 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:35:27,520 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-06 19:35:27,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-12-06 19:35:27,700 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:35:27,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:35:27,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1361104633, now seen corresponding path program 1 times [2021-12-06 19:35:27,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:35:27,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741196418] [2021-12-06 19:35:27,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:35:27,701 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:35:27,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:27,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 19:35:27,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:27,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:35:27,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:27,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 19:35:27,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:27,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 19:35:27,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:27,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-06 19:35:27,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:27,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-06 19:35:27,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:27,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 19:35:27,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:27,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-06 19:35:27,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:27,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 19:35:27,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:27,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 19:35:27,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:27,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-06 19:35:27,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:27,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-06 19:35:27,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:27,800 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-12-06 19:35:27,800 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:35:27,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741196418] [2021-12-06 19:35:27,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741196418] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:35:27,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375644336] [2021-12-06 19:35:27,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:35:27,800 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:35:27,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:35:27,801 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:35:27,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 19:35:27,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:27,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 19:35:27,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:35:28,001 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-06 19:35:28,001 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:35:28,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375644336] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:35:28,001 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:35:28,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2021-12-06 19:35:28,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349676167] [2021-12-06 19:35:28,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:35:28,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 19:35:28,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:35:28,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 19:35:28,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 19:35:28,003 INFO L87 Difference]: Start difference. First operand 224 states and 307 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-06 19:35:28,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:35:28,027 INFO L93 Difference]: Finished difference Result 382 states and 541 transitions. [2021-12-06 19:35:28,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 19:35:28,027 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 101 [2021-12-06 19:35:28,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:35:28,029 INFO L225 Difference]: With dead ends: 382 [2021-12-06 19:35:28,029 INFO L226 Difference]: Without dead ends: 229 [2021-12-06 19:35:28,030 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:35:28,030 INFO L933 BasicCegarLoop]: 129 mSDtfsCounter, 8 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:35:28,030 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 361 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:35:28,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-12-06 19:35:28,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 222. [2021-12-06 19:35:28,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 162 states have (on average 1.271604938271605) internal successors, (206), 165 states have internal predecessors, (206), 41 states have call successors, (41), 18 states have call predecessors, (41), 18 states have return successors, (54), 38 states have call predecessors, (54), 40 states have call successors, (54) [2021-12-06 19:35:28,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 301 transitions. [2021-12-06 19:35:28,044 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 301 transitions. Word has length 101 [2021-12-06 19:35:28,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:35:28,045 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 301 transitions. [2021-12-06 19:35:28,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-06 19:35:28,045 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 301 transitions. [2021-12-06 19:35:28,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-06 19:35:28,046 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:35:28,046 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:35:28,067 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-06 19:35:28,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:35:28,247 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:35:28,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:35:28,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1528777401, now seen corresponding path program 1 times [2021-12-06 19:35:28,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:35:28,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783156269] [2021-12-06 19:35:28,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:35:28,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:35:28,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:28,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 19:35:28,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:28,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:35:28,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:28,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 19:35:28,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:28,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 19:35:28,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:28,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-06 19:35:28,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:28,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-06 19:35:28,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:28,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 19:35:28,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:28,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-06 19:35:28,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:28,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 19:35:28,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:28,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 19:35:28,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:28,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-06 19:35:28,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:28,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-06 19:35:28,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:28,366 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-12-06 19:35:28,366 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:35:28,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783156269] [2021-12-06 19:35:28,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783156269] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:35:28,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759666553] [2021-12-06 19:35:28,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:35:28,366 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:35:28,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:35:28,367 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:35:28,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-06 19:35:28,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:28,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 19:35:28,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:35:28,557 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-12-06 19:35:28,558 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:35:28,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759666553] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:35:28,558 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:35:28,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2021-12-06 19:35:28,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709041861] [2021-12-06 19:35:28,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:35:28,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 19:35:28,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:35:28,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 19:35:28,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 19:35:28,559 INFO L87 Difference]: Start difference. First operand 222 states and 301 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-06 19:35:28,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:35:28,576 INFO L93 Difference]: Finished difference Result 332 states and 461 transitions. [2021-12-06 19:35:28,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 19:35:28,577 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 101 [2021-12-06 19:35:28,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:35:28,578 INFO L225 Difference]: With dead ends: 332 [2021-12-06 19:35:28,578 INFO L226 Difference]: Without dead ends: 167 [2021-12-06 19:35:28,579 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:35:28,579 INFO L933 BasicCegarLoop]: 120 mSDtfsCounter, 2 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:35:28,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 351 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:35:28,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-12-06 19:35:28,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 161. [2021-12-06 19:35:28,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 114 states have (on average 1.2017543859649122) internal successors, (137), 115 states have internal predecessors, (137), 33 states have call successors, (33), 15 states have call predecessors, (33), 13 states have return successors, (32), 30 states have call predecessors, (32), 32 states have call successors, (32) [2021-12-06 19:35:28,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 202 transitions. [2021-12-06 19:35:28,588 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 202 transitions. Word has length 101 [2021-12-06 19:35:28,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:35:28,588 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 202 transitions. [2021-12-06 19:35:28,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-06 19:35:28,589 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 202 transitions. [2021-12-06 19:35:28,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-06 19:35:28,590 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:35:28,590 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:35:28,610 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-06 19:35:28,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-06 19:35:28,791 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:35:28,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:35:28,792 INFO L85 PathProgramCache]: Analyzing trace with hash 573895629, now seen corresponding path program 1 times [2021-12-06 19:35:28,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:35:28,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297737962] [2021-12-06 19:35:28,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:35:28,793 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:35:28,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:28,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 19:35:28,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:28,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:35:28,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:29,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 19:35:29,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:29,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 19:35:29,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:29,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-06 19:35:29,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:29,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-06 19:35:29,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:29,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 19:35:29,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:29,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-06 19:35:29,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:29,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-06 19:35:29,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:29,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 19:35:29,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:29,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-06 19:35:29,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:29,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-06 19:35:29,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:29,281 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-12-06 19:35:29,281 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:35:29,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297737962] [2021-12-06 19:35:29,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297737962] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:35:29,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337558242] [2021-12-06 19:35:29,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:35:29,282 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:35:29,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:35:29,282 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:35:29,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-06 19:35:29,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:29,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 74 conjunts are in the unsatisfiable core [2021-12-06 19:35:29,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:35:29,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 19:35:29,568 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2021-12-06 19:35:29,576 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 19:35:29,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2021-12-06 19:35:29,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 19:35:29,592 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 19:35:29,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-06 19:35:29,652 INFO L354 Elim1Store]: treesize reduction 38, result has 22.4 percent of original size [2021-12-06 19:35:29,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 65 treesize of output 62 [2021-12-06 19:35:29,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:35:29,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 44 [2021-12-06 19:35:29,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2021-12-06 19:35:29,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-12-06 19:35:29,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 19:35:31,697 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_linked_list_back_harness_~#list~0#1.base_BEFORE_CALL_35| Int)) (not (= |v_ULTIMATE.start_aws_linked_list_back_harness_~#list~0#1.base_BEFORE_CALL_35| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_back_harness_~#list~0#1.base_BEFORE_CALL_35|) 0)))) is different from true [2021-12-06 19:35:33,771 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_linked_list_back_harness_~#list~0#1.base_BEFORE_CALL_36| Int)) (not (= |v_ULTIMATE.start_aws_linked_list_back_harness_~#list~0#1.base_BEFORE_CALL_36| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_back_harness_~#list~0#1.base_BEFORE_CALL_36|) 0)))) is different from true [2021-12-06 19:35:35,847 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_aws_linked_list_back_~list.base_BEFORE_CALL_29 Int)) (not (= v_aws_linked_list_back_~list.base_BEFORE_CALL_29 (select (select |c_#memory_$Pointer$.base| v_aws_linked_list_back_~list.base_BEFORE_CALL_29) 0)))) is different from true [2021-12-06 19:35:50,171 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 52 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 12 not checked. [2021-12-06 19:35:50,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:35:52,466 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_966 (Array Int Int)) (v_ArrVal_965 (Array Int Int)) (v_ArrVal_968 Int)) (not (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_965) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_966) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24) v_ArrVal_968)) |c_ULTIMATE.start_aws_linked_list_back_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_back_harness_~#list~0#1.offset|) |c_ULTIMATE.start_aws_linked_list_back_harness_~#list~0#1.base|))) is different from false [2021-12-06 19:35:52,481 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:35:52,481 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 33 [2021-12-06 19:35:52,491 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:35:52,492 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 147 treesize of output 151 [2021-12-06 19:35:52,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 140 [2021-12-06 19:35:52,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 140 treesize of output 138 [2021-12-06 19:35:52,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2021-12-06 19:35:52,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-12-06 19:35:52,641 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:35:52,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 58 [2021-12-06 19:35:52,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337558242] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:35:52,785 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:35:52,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 32 [2021-12-06 19:35:52,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569698538] [2021-12-06 19:35:52,785 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:35:52,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-06 19:35:52,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:35:52,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-06 19:35:52,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1367, Unknown=6, NotChecked=308, Total=1806 [2021-12-06 19:35:52,787 INFO L87 Difference]: Start difference. First operand 161 states and 202 transitions. Second operand has 32 states, 29 states have (on average 4.413793103448276) internal successors, (128), 29 states have internal predecessors, (128), 13 states have call successors, (27), 8 states have call predecessors, (27), 10 states have return successors, (24), 11 states have call predecessors, (24), 12 states have call successors, (24) [2021-12-06 19:36:33,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:36:33,901 INFO L93 Difference]: Finished difference Result 311 states and 412 transitions. [2021-12-06 19:36:33,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-06 19:36:33,902 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 29 states have (on average 4.413793103448276) internal successors, (128), 29 states have internal predecessors, (128), 13 states have call successors, (27), 8 states have call predecessors, (27), 10 states have return successors, (24), 11 states have call predecessors, (24), 12 states have call successors, (24) Word has length 102 [2021-12-06 19:36:33,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:36:33,903 INFO L225 Difference]: With dead ends: 311 [2021-12-06 19:36:33,903 INFO L226 Difference]: Without dead ends: 219 [2021-12-06 19:36:33,905 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 187 SyntacticMatches, 6 SemanticMatches, 60 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 708 ImplicationChecksByTransitivity, 63.3s TimeCoverageRelationStatistics Valid=253, Invalid=3050, Unknown=19, NotChecked=460, Total=3782 [2021-12-06 19:36:33,905 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 109 mSDsluCounter, 1800 mSDsCounter, 0 mSdLazyCounter, 1199 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 1927 SdHoareTripleChecker+Invalid, 2536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1251 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 19:36:33,905 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 1927 Invalid, 2536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1199 Invalid, 0 Unknown, 1251 Unchecked, 0.6s Time] [2021-12-06 19:36:33,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-12-06 19:36:33,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 167. [2021-12-06 19:36:33,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 119 states have (on average 1.1932773109243697) internal successors, (142), 120 states have internal predecessors, (142), 33 states have call successors, (33), 16 states have call predecessors, (33), 14 states have return successors, (32), 30 states have call predecessors, (32), 32 states have call successors, (32) [2021-12-06 19:36:33,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 207 transitions. [2021-12-06 19:36:33,917 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 207 transitions. Word has length 102 [2021-12-06 19:36:33,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:36:33,917 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 207 transitions. [2021-12-06 19:36:33,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 29 states have (on average 4.413793103448276) internal successors, (128), 29 states have internal predecessors, (128), 13 states have call successors, (27), 8 states have call predecessors, (27), 10 states have return successors, (24), 11 states have call predecessors, (24), 12 states have call successors, (24) [2021-12-06 19:36:33,917 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 207 transitions. [2021-12-06 19:36:33,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-06 19:36:33,918 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:36:33,918 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-06 19:36:33,941 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-06 19:36:34,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-06 19:36:34,120 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:36:34,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:36:34,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1371896036, now seen corresponding path program 1 times [2021-12-06 19:36:34,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:36:34,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280347423] [2021-12-06 19:36:34,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:36:34,122 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:36:34,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:36:34,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 19:36:34,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:36:34,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:36:34,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:36:34,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 19:36:34,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:36:34,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 19:36:34,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:36:34,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-06 19:36:34,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:36:34,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-06 19:36:34,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:36:34,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 19:36:34,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:36:34,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 19:36:34,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:36:34,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-06 19:36:34,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:36:34,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-06 19:36:34,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:36:34,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 19:36:34,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:36:34,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-06 19:36:34,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:36:34,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-06 19:36:34,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:36:34,315 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-12-06 19:36:34,316 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:36:34,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280347423] [2021-12-06 19:36:34,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280347423] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:36:34,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499534054] [2021-12-06 19:36:34,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:36:34,316 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:36:34,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:36:34,317 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:36:34,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-06 19:36:34,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:36:34,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-06 19:36:34,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:36:34,678 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-06 19:36:34,679 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:36:34,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499534054] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:36:34,679 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:36:34,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 13 [2021-12-06 19:36:34,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059021994] [2021-12-06 19:36:34,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:36:34,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 19:36:34,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:36:34,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 19:36:34,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-12-06 19:36:34,680 INFO L87 Difference]: Start difference. First operand 167 states and 207 transitions. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 8 states have internal predecessors, (71), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-12-06 19:36:34,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:36:34,811 INFO L93 Difference]: Finished difference Result 269 states and 349 transitions. [2021-12-06 19:36:34,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 19:36:34,811 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 8 states have internal predecessors, (71), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 112 [2021-12-06 19:36:34,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:36:34,812 INFO L225 Difference]: With dead ends: 269 [2021-12-06 19:36:34,812 INFO L226 Difference]: Without dead ends: 180 [2021-12-06 19:36:34,813 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-12-06 19:36:34,813 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 20 mSDsluCounter, 495 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 613 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:36:34,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 613 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 93 Invalid, 0 Unknown, 46 Unchecked, 0.1s Time] [2021-12-06 19:36:34,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-12-06 19:36:34,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 176. [2021-12-06 19:36:34,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 127 states have (on average 1.204724409448819) internal successors, (153), 127 states have internal predecessors, (153), 33 states have call successors, (33), 16 states have call predecessors, (33), 15 states have return successors, (38), 32 states have call predecessors, (38), 32 states have call successors, (38) [2021-12-06 19:36:34,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 224 transitions. [2021-12-06 19:36:34,824 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 224 transitions. Word has length 112 [2021-12-06 19:36:34,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:36:34,825 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 224 transitions. [2021-12-06 19:36:34,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 8 states have internal predecessors, (71), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-12-06 19:36:34,825 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 224 transitions. [2021-12-06 19:36:34,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-12-06 19:36:34,826 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:36:34,826 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:36:34,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-06 19:36:35,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-06 19:36:35,026 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:36:35,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:36:35,027 INFO L85 PathProgramCache]: Analyzing trace with hash 704509468, now seen corresponding path program 1 times [2021-12-06 19:36:35,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:36:35,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755607438] [2021-12-06 19:36:35,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:36:35,027 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:36:35,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:36:35,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 19:36:35,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:36:35,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:36:35,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:36:35,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 19:36:35,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:36:35,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 19:36:35,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:36:35,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-06 19:36:35,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:36:35,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-06 19:36:35,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:36:35,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 19:36:35,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:36:35,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 19:36:35,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:36:35,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-06 19:36:35,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:36:35,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-06 19:36:35,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:36:35,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 19:36:35,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:36:35,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-06 19:36:35,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:36:35,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-06 19:36:35,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:36:35,169 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-12-06 19:36:35,169 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:36:35,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755607438] [2021-12-06 19:36:35,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755607438] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:36:35,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928615015] [2021-12-06 19:36:35,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:36:35,170 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:36:35,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:36:35,171 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:36:35,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-06 19:36:35,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:36:35,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 73 conjunts are in the unsatisfiable core [2021-12-06 19:36:35,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:36:35,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:36:35,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2021-12-06 19:36:35,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:36:35,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-12-06 19:37:01,925 WARN L227 SmtUtils]: Spent 10.03s on a formula simplification that was a NOOP. DAG size: 28 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 19:37:02,096 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-06 19:37:02,097 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 22 [2021-12-06 19:37:02,100 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-12-06 19:37:02,100 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 1 [2021-12-06 19:37:02,124 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 67 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-06 19:37:02,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:37:02,518 INFO L354 Elim1Store]: treesize reduction 17, result has 63.0 percent of original size [2021-12-06 19:37:02,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 94 treesize of output 98 [2021-12-06 19:37:02,528 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:37:02,528 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 98 treesize of output 114 [2021-12-06 19:37:02,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2021-12-06 19:37:02,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-12-06 19:37:02,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-12-06 19:37:02,697 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:37:02,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2021-12-06 19:37:02,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-12-06 19:37:02,786 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:37:02,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 47 [2021-12-06 19:37:02,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:37:02,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:37:02,819 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-06 19:37:02,819 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 1 [2021-12-06 19:37:02,876 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-12-06 19:37:02,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928615015] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:37:02,876 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:37:02,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 14, 12] total 30 [2021-12-06 19:37:02,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685743176] [2021-12-06 19:37:02,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:37:02,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-06 19:37:02,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:37:02,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-06 19:37:02,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=770, Unknown=8, NotChecked=0, Total=870 [2021-12-06 19:37:02,878 INFO L87 Difference]: Start difference. First operand 176 states and 224 transitions. Second operand has 30 states, 27 states have (on average 5.222222222222222) internal successors, (141), 27 states have internal predecessors, (141), 15 states have call successors, (36), 6 states have call predecessors, (36), 8 states have return successors, (32), 13 states have call predecessors, (32), 15 states have call successors, (32) [2021-12-06 19:37:15,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:37:15,449 INFO L93 Difference]: Finished difference Result 332 states and 426 transitions. [2021-12-06 19:37:15,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-06 19:37:15,450 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 27 states have (on average 5.222222222222222) internal successors, (141), 27 states have internal predecessors, (141), 15 states have call successors, (36), 6 states have call predecessors, (36), 8 states have return successors, (32), 13 states have call predecessors, (32), 15 states have call successors, (32) Word has length 110 [2021-12-06 19:37:15,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:37:15,451 INFO L225 Difference]: With dead ends: 332 [2021-12-06 19:37:15,451 INFO L226 Difference]: Without dead ends: 163 [2021-12-06 19:37:15,452 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 234 SyntacticMatches, 5 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 38.9s TimeCoverageRelationStatistics Valid=219, Invalid=1837, Unknown=14, NotChecked=0, Total=2070 [2021-12-06 19:37:15,453 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 130 mSDsluCounter, 1661 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 1774 SdHoareTripleChecker+Invalid, 554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 128 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 19:37:15,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 1774 Invalid, 554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 421 Invalid, 0 Unknown, 128 Unchecked, 0.2s Time] [2021-12-06 19:37:15,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-12-06 19:37:15,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 149. [2021-12-06 19:37:15,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 107 states have (on average 1.205607476635514) internal successors, (129), 108 states have internal predecessors, (129), 28 states have call successors, (28), 12 states have call predecessors, (28), 13 states have return successors, (33), 28 states have call predecessors, (33), 27 states have call successors, (33) [2021-12-06 19:37:15,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 190 transitions. [2021-12-06 19:37:15,463 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 190 transitions. Word has length 110 [2021-12-06 19:37:15,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:37:15,463 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 190 transitions. [2021-12-06 19:37:15,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 27 states have (on average 5.222222222222222) internal successors, (141), 27 states have internal predecessors, (141), 15 states have call successors, (36), 6 states have call predecessors, (36), 8 states have return successors, (32), 13 states have call predecessors, (32), 15 states have call successors, (32) [2021-12-06 19:37:15,463 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 190 transitions. [2021-12-06 19:37:15,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-06 19:37:15,464 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:37:15,464 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:37:15,495 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-06 19:37:15,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:37:15,664 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:37:15,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:37:15,665 INFO L85 PathProgramCache]: Analyzing trace with hash 1842687050, now seen corresponding path program 2 times [2021-12-06 19:37:15,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:37:15,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008619346] [2021-12-06 19:37:15,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:37:15,665 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:37:15,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:37:15,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 19:37:15,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:37:15,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:37:15,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:37:15,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 19:37:15,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:37:15,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 19:37:15,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:37:15,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-06 19:37:15,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:37:15,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-06 19:37:15,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:37:15,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 19:37:15,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:37:15,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 19:37:15,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:37:15,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-06 19:37:15,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:37:15,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-06 19:37:15,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:37:15,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 19:37:15,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:37:15,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-06 19:37:15,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:37:15,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-06 19:37:15,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:37:15,992 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2021-12-06 19:37:15,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:37:15,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008619346] [2021-12-06 19:37:15,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008619346] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:37:15,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312085663] [2021-12-06 19:37:15,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 19:37:15,993 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:37:15,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:37:15,993 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:37:15,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-06 19:37:16,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 19:37:16,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:37:16,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 96 conjunts are in the unsatisfiable core [2021-12-06 19:37:16,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:37:16,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 19:37:16,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:37:16,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2021-12-06 19:37:16,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:37:16,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2021-12-06 19:37:16,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:37:16,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2021-12-06 19:37:16,320 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 19:37:16,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2021-12-06 19:37:16,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:37:16,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-12-06 19:37:16,337 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 19:37:16,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-06 19:37:16,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:37:16,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2021-12-06 19:37:16,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2021-12-06 19:37:16,423 INFO L354 Elim1Store]: treesize reduction 38, result has 22.4 percent of original size [2021-12-06 19:37:16,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 101 treesize of output 92 [2021-12-06 19:37:16,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:37:16,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:37:16,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:37:16,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 75 [2021-12-06 19:37:16,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:37:16,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 32 [2021-12-06 19:37:16,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:37:16,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:37:16,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:37:16,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 32 [2021-12-06 19:37:16,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2021-12-06 19:37:16,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-12-06 19:37:16,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 19:37:18,288 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 44 proven. 26 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-06 19:37:18,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:37:18,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312085663] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:37:18,554 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:37:18,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 21] total 30 [2021-12-06 19:37:18,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319535550] [2021-12-06 19:37:18,554 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:37:18,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-06 19:37:18,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:37:18,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-06 19:37:18,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1064, Unknown=0, NotChecked=0, Total=1190 [2021-12-06 19:37:18,556 INFO L87 Difference]: Start difference. First operand 149 states and 190 transitions. Second operand has 30 states, 28 states have (on average 4.214285714285714) internal successors, (118), 28 states have internal predecessors, (118), 14 states have call successors, (27), 7 states have call predecessors, (27), 8 states have return successors, (24), 12 states have call predecessors, (24), 13 states have call successors, (24) [2021-12-06 19:37:19,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:37:19,212 INFO L93 Difference]: Finished difference Result 376 states and 496 transitions. [2021-12-06 19:37:19,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-06 19:37:19,212 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 4.214285714285714) internal successors, (118), 28 states have internal predecessors, (118), 14 states have call successors, (27), 7 states have call predecessors, (27), 8 states have return successors, (24), 12 states have call predecessors, (24), 13 states have call successors, (24) Word has length 113 [2021-12-06 19:37:19,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:37:19,214 INFO L225 Difference]: With dead ends: 376 [2021-12-06 19:37:19,214 INFO L226 Difference]: Without dead ends: 294 [2021-12-06 19:37:19,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 148 SyntacticMatches, 13 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 722 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=228, Invalid=2124, Unknown=0, NotChecked=0, Total=2352 [2021-12-06 19:37:19,216 INFO L933 BasicCegarLoop]: 164 mSDtfsCounter, 97 mSDsluCounter, 2297 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 2461 SdHoareTripleChecker+Invalid, 1075 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 609 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 19:37:19,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 2461 Invalid, 1075 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 412 Invalid, 0 Unknown, 609 Unchecked, 0.3s Time] [2021-12-06 19:37:19,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-12-06 19:37:19,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 268. [2021-12-06 19:37:19,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 195 states have (on average 1.2) internal successors, (234), 199 states have internal predecessors, (234), 48 states have call successors, (48), 20 states have call predecessors, (48), 24 states have return successors, (63), 48 states have call predecessors, (63), 47 states have call successors, (63) [2021-12-06 19:37:19,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 345 transitions. [2021-12-06 19:37:19,236 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 345 transitions. Word has length 113 [2021-12-06 19:37:19,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:37:19,237 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 345 transitions. [2021-12-06 19:37:19,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 4.214285714285714) internal successors, (118), 28 states have internal predecessors, (118), 14 states have call successors, (27), 7 states have call predecessors, (27), 8 states have return successors, (24), 12 states have call predecessors, (24), 13 states have call successors, (24) [2021-12-06 19:37:19,237 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 345 transitions. [2021-12-06 19:37:19,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-06 19:37:19,238 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:37:19,238 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:37:19,270 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-06 19:37:19,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:37:19,438 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:37:19,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:37:19,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1033340424, now seen corresponding path program 1 times [2021-12-06 19:37:19,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:37:19,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860656097] [2021-12-06 19:37:19,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:37:19,439 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:37:19,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:37:19,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 19:37:19,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:37:19,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:37:19,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:37:19,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 19:37:19,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:37:19,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 19:37:19,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:37:19,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-06 19:37:19,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:37:19,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-06 19:37:19,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:37:19,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 19:37:19,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:37:19,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 19:37:19,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:37:19,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-06 19:37:19,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:37:19,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-06 19:37:19,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:37:19,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 19:37:19,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:37:19,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-06 19:37:19,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:37:19,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-06 19:37:19,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:37:19,889 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-12-06 19:37:19,890 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:37:19,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860656097] [2021-12-06 19:37:19,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860656097] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:37:19,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083303441] [2021-12-06 19:37:19,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:37:19,890 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:37:19,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:37:19,891 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:37:19,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-06 19:37:20,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:37:20,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-06 19:37:20,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:37:20,143 INFO L354 Elim1Store]: treesize reduction 30, result has 38.8 percent of original size [2021-12-06 19:37:20,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 55 [2021-12-06 19:37:20,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-12-06 19:37:20,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2021-12-06 19:37:20,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 25 [2021-12-06 19:37:20,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 19:37:20,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 17 [2021-12-06 19:37:20,955 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-12-06 19:37:20,955 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:37:20,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083303441] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:37:20,956 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:37:20,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [18] total 28 [2021-12-06 19:37:20,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877049585] [2021-12-06 19:37:20,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:37:20,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-06 19:37:20,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:37:20,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-06 19:37:20,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2021-12-06 19:37:20,958 INFO L87 Difference]: Start difference. First operand 268 states and 345 transitions. Second operand has 12 states, 12 states have (on average 5.0) internal successors, (60), 11 states have internal predecessors, (60), 5 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2021-12-06 19:37:21,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:37:21,050 INFO L93 Difference]: Finished difference Result 422 states and 546 transitions. [2021-12-06 19:37:21,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 19:37:21,050 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 11 states have internal predecessors, (60), 5 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 113 [2021-12-06 19:37:21,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:37:21,053 INFO L225 Difference]: With dead ends: 422 [2021-12-06 19:37:21,053 INFO L226 Difference]: Without dead ends: 319 [2021-12-06 19:37:21,054 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 117 SyntacticMatches, 12 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=90, Invalid=780, Unknown=0, NotChecked=0, Total=870 [2021-12-06 19:37:21,055 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 35 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 470 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:37:21,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 470 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 74 Unchecked, 0.0s Time] [2021-12-06 19:37:21,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-12-06 19:37:21,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 311. [2021-12-06 19:37:21,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 233 states have (on average 1.206008583690987) internal successors, (281), 237 states have internal predecessors, (281), 50 states have call successors, (50), 22 states have call predecessors, (50), 27 states have return successors, (65), 51 states have call predecessors, (65), 49 states have call successors, (65) [2021-12-06 19:37:21,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 396 transitions. [2021-12-06 19:37:21,089 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 396 transitions. Word has length 113 [2021-12-06 19:37:21,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:37:21,089 INFO L470 AbstractCegarLoop]: Abstraction has 311 states and 396 transitions. [2021-12-06 19:37:21,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 11 states have internal predecessors, (60), 5 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2021-12-06 19:37:21,090 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 396 transitions. [2021-12-06 19:37:21,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-06 19:37:21,091 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:37:21,091 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:37:21,112 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-06 19:37:21,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-06 19:37:21,291 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:37:21,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:37:21,292 INFO L85 PathProgramCache]: Analyzing trace with hash 640313414, now seen corresponding path program 1 times [2021-12-06 19:37:21,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:37:21,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535879827] [2021-12-06 19:37:21,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:37:21,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:37:21,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:37:21,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 19:37:21,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:37:21,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:37:21,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:37:21,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 19:37:21,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:37:21,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 19:37:21,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:37:21,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-06 19:37:21,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:37:21,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-06 19:37:21,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:37:21,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 19:37:21,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:37:21,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 19:37:21,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:37:21,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-06 19:37:21,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:37:21,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-06 19:37:21,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:37:21,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 19:37:21,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:37:21,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-06 19:37:21,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:37:21,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-06 19:37:21,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:37:21,755 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-06 19:37:21,755 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:37:21,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535879827] [2021-12-06 19:37:21,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535879827] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:37:21,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923636550] [2021-12-06 19:37:21,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:37:21,756 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:37:21,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:37:21,756 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:37:21,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-06 19:37:21,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:37:21,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 46 conjunts are in the unsatisfiable core [2021-12-06 19:37:21,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:37:21,958 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 19:37:21,959 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 9 treesize of output 15 [2021-12-06 19:37:21,968 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 19:37:21,968 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 9 treesize of output 15 [2021-12-06 19:37:22,885 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 47 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-06 19:37:22,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:37:23,310 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-06 19:37:23,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923636550] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:37:23,310 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:37:23,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 11] total 39 [2021-12-06 19:37:23,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697208620] [2021-12-06 19:37:23,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:37:23,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-06 19:37:23,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:37:23,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-06 19:37:23,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1332, Unknown=0, NotChecked=0, Total=1482 [2021-12-06 19:37:23,312 INFO L87 Difference]: Start difference. First operand 311 states and 396 transitions. Second operand has 39 states, 37 states have (on average 3.5405405405405403) internal successors, (131), 37 states have internal predecessors, (131), 13 states have call successors, (36), 6 states have call predecessors, (36), 8 states have return successors, (32), 11 states have call predecessors, (32), 12 states have call successors, (32) [2021-12-06 19:37:24,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:37:24,058 INFO L93 Difference]: Finished difference Result 456 states and 581 transitions. [2021-12-06 19:37:24,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-06 19:37:24,058 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 37 states have (on average 3.5405405405405403) internal successors, (131), 37 states have internal predecessors, (131), 13 states have call successors, (36), 6 states have call predecessors, (36), 8 states have return successors, (32), 11 states have call predecessors, (32), 12 states have call successors, (32) Word has length 113 [2021-12-06 19:37:24,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:37:24,060 INFO L225 Difference]: With dead ends: 456 [2021-12-06 19:37:24,060 INFO L226 Difference]: Without dead ends: 355 [2021-12-06 19:37:24,061 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 221 SyntacticMatches, 14 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=263, Invalid=2089, Unknown=0, NotChecked=0, Total=2352 [2021-12-06 19:37:24,061 INFO L933 BasicCegarLoop]: 123 mSDtfsCounter, 226 mSDsluCounter, 1895 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 2018 SdHoareTripleChecker+Invalid, 864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 150 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 19:37:24,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 2018 Invalid, 864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 643 Invalid, 0 Unknown, 150 Unchecked, 0.3s Time] [2021-12-06 19:37:24,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2021-12-06 19:37:24,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 318. [2021-12-06 19:37:24,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 239 states have (on average 1.200836820083682) internal successors, (287), 243 states have internal predecessors, (287), 50 states have call successors, (50), 23 states have call predecessors, (50), 28 states have return successors, (62), 51 states have call predecessors, (62), 49 states have call successors, (62) [2021-12-06 19:37:24,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 399 transitions. [2021-12-06 19:37:24,085 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 399 transitions. Word has length 113 [2021-12-06 19:37:24,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:37:24,085 INFO L470 AbstractCegarLoop]: Abstraction has 318 states and 399 transitions. [2021-12-06 19:37:24,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 37 states have (on average 3.5405405405405403) internal successors, (131), 37 states have internal predecessors, (131), 13 states have call successors, (36), 6 states have call predecessors, (36), 8 states have return successors, (32), 11 states have call predecessors, (32), 12 states have call successors, (32) [2021-12-06 19:37:24,086 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 399 transitions. [2021-12-06 19:37:24,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-06 19:37:24,086 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:37:24,087 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:37:24,108 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-12-06 19:37:24,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-06 19:37:24,288 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:37:24,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:37:24,289 INFO L85 PathProgramCache]: Analyzing trace with hash 898478852, now seen corresponding path program 1 times [2021-12-06 19:37:24,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:37:24,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411440643] [2021-12-06 19:37:24,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:37:24,290 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:37:24,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:37:24,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 19:37:24,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:37:24,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:37:24,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:37:24,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 19:37:24,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:37:24,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 19:37:24,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:37:24,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-06 19:37:24,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:37:24,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-06 19:37:24,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:37:24,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 19:37:24,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:37:24,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 19:37:24,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:37:24,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-06 19:37:24,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:37:24,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-06 19:37:24,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:37:24,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 19:37:24,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:37:24,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-06 19:37:24,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:37:24,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-06 19:37:24,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:37:24,557 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-12-06 19:37:24,557 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:37:24,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411440643] [2021-12-06 19:37:24,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411440643] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:37:24,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217354488] [2021-12-06 19:37:24,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:37:24,558 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:37:24,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:37:24,558 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:37:24,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-06 19:37:24,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:37:24,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 56 conjunts are in the unsatisfiable core [2021-12-06 19:37:24,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:37:24,732 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 19:37:24,733 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 9 treesize of output 15 [2021-12-06 19:37:24,740 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 19:37:24,740 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 9 treesize of output 15 [2021-12-06 19:37:25,772 WARN L860 $PredicateComparison]: unable to prove that (or (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_16| Int) (|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_14| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_14|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_16|) 0))) (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_16| Int) (|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_14| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_14|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_16|) 0)))) is different from true [2021-12-06 19:37:26,304 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 50 proven. 16 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-06 19:37:26,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:37:26,642 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-12-06 19:37:26,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217354488] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:37:26,642 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:37:26,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 18, 12] total 27 [2021-12-06 19:37:26,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695907843] [2021-12-06 19:37:26,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:37:26,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-06 19:37:26,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:37:26,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-06 19:37:26,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=573, Unknown=1, NotChecked=48, Total=702 [2021-12-06 19:37:26,644 INFO L87 Difference]: Start difference. First operand 318 states and 399 transitions. Second operand has 27 states, 26 states have (on average 4.230769230769231) internal successors, (110), 26 states have internal predecessors, (110), 11 states have call successors, (27), 5 states have call predecessors, (27), 6 states have return successors, (24), 10 states have call predecessors, (24), 10 states have call successors, (24) [2021-12-06 19:37:27,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:37:27,149 INFO L93 Difference]: Finished difference Result 521 states and 657 transitions. [2021-12-06 19:37:27,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-06 19:37:27,150 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 4.230769230769231) internal successors, (110), 26 states have internal predecessors, (110), 11 states have call successors, (27), 5 states have call predecessors, (27), 6 states have return successors, (24), 10 states have call predecessors, (24), 10 states have call successors, (24) Word has length 113 [2021-12-06 19:37:27,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:37:27,152 INFO L225 Difference]: With dead ends: 521 [2021-12-06 19:37:27,152 INFO L226 Difference]: Without dead ends: 409 [2021-12-06 19:37:27,153 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 228 SyntacticMatches, 7 SemanticMatches, 36 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=178, Invalid=1157, Unknown=1, NotChecked=70, Total=1406 [2021-12-06 19:37:27,153 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 181 mSDsluCounter, 1620 mSDsCounter, 0 mSdLazyCounter, 587 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 1746 SdHoareTripleChecker+Invalid, 1197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 570 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 19:37:27,153 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 1746 Invalid, 1197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 587 Invalid, 0 Unknown, 570 Unchecked, 0.3s Time] [2021-12-06 19:37:27,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2021-12-06 19:37:27,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 343. [2021-12-06 19:37:27,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 261 states have (on average 1.206896551724138) internal successors, (315), 265 states have internal predecessors, (315), 50 states have call successors, (50), 26 states have call predecessors, (50), 31 states have return successors, (62), 51 states have call predecessors, (62), 49 states have call successors, (62) [2021-12-06 19:37:27,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 427 transitions. [2021-12-06 19:37:27,179 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 427 transitions. Word has length 113 [2021-12-06 19:37:27,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:37:27,179 INFO L470 AbstractCegarLoop]: Abstraction has 343 states and 427 transitions. [2021-12-06 19:37:27,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 4.230769230769231) internal successors, (110), 26 states have internal predecessors, (110), 11 states have call successors, (27), 5 states have call predecessors, (27), 6 states have return successors, (24), 10 states have call predecessors, (24), 10 states have call successors, (24) [2021-12-06 19:37:27,180 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 427 transitions. [2021-12-06 19:37:27,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-06 19:37:27,180 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:37:27,181 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:37:27,214 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-12-06 19:37:27,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-06 19:37:27,381 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:37:27,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:37:27,381 INFO L85 PathProgramCache]: Analyzing trace with hash -112638398, now seen corresponding path program 1 times [2021-12-06 19:37:27,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:37:27,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261998999] [2021-12-06 19:37:27,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:37:27,382 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:37:27,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:37:27,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 19:37:27,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:37:27,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:37:27,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:37:27,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 19:37:27,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:37:27,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 19:37:27,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:37:27,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-06 19:37:27,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:37:27,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-06 19:37:27,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:37:27,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 19:37:27,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:37:27,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 19:37:27,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:37:27,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-06 19:37:27,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:37:27,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-06 19:37:27,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:37:27,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 19:37:27,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:37:27,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-06 19:37:27,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:37:27,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-06 19:37:27,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:37:27,582 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-06 19:37:27,582 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:37:27,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261998999] [2021-12-06 19:37:27,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261998999] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:37:27,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808853645] [2021-12-06 19:37:27,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:37:27,583 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:37:27,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:37:27,583 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:37:27,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-06 19:37:27,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:37:27,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 19:37:27,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:37:27,833 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-06 19:37:27,833 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:37:27,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808853645] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:37:27,834 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:37:27,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 17 [2021-12-06 19:37:27,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875657024] [2021-12-06 19:37:27,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:37:27,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 19:37:27,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:37:27,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 19:37:27,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-12-06 19:37:27,835 INFO L87 Difference]: Start difference. First operand 343 states and 427 transitions. Second operand has 8 states, 8 states have (on average 7.125) internal successors, (57), 7 states have internal predecessors, (57), 4 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-06 19:37:27,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:37:27,967 INFO L93 Difference]: Finished difference Result 709 states and 904 transitions. [2021-12-06 19:37:27,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 19:37:27,967 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.125) internal successors, (57), 7 states have internal predecessors, (57), 4 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) Word has length 113 [2021-12-06 19:37:27,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:37:27,969 INFO L225 Difference]: With dead ends: 709 [2021-12-06 19:37:27,969 INFO L226 Difference]: Without dead ends: 329 [2021-12-06 19:37:27,970 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-12-06 19:37:27,970 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 140 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 592 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:37:27,971 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 592 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 19:37:27,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2021-12-06 19:37:27,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 329. [2021-12-06 19:37:27,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 247 states have (on average 1.1902834008097165) internal successors, (294), 251 states have internal predecessors, (294), 50 states have call successors, (50), 26 states have call predecessors, (50), 31 states have return successors, (62), 51 states have call predecessors, (62), 49 states have call successors, (62) [2021-12-06 19:37:27,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 406 transitions. [2021-12-06 19:37:27,994 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 406 transitions. Word has length 113 [2021-12-06 19:37:27,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:37:27,995 INFO L470 AbstractCegarLoop]: Abstraction has 329 states and 406 transitions. [2021-12-06 19:37:27,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.125) internal successors, (57), 7 states have internal predecessors, (57), 4 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-06 19:37:27,995 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 406 transitions. [2021-12-06 19:37:27,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-12-06 19:37:27,996 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:37:27,996 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:37:28,028 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-12-06 19:37:28,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-06 19:37:28,198 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:37:28,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:37:28,199 INFO L85 PathProgramCache]: Analyzing trace with hash 802745279, now seen corresponding path program 1 times [2021-12-06 19:37:28,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:37:28,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446310760] [2021-12-06 19:37:28,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:37:28,201 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:37:28,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:37:28,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 19:37:28,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:37:28,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:37:28,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:37:28,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 19:37:28,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:37:28,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 19:37:28,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:37:28,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-06 19:37:28,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:37:28,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-06 19:37:28,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:37:28,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 19:37:28,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:37:28,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 19:37:28,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:37:28,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-06 19:37:28,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:37:28,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-06 19:37:28,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:37:28,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 19:37:28,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:37:28,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-06 19:37:28,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:37:28,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-06 19:37:28,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:37:28,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 19:37:28,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:37:28,737 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 7 proven. 25 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-12-06 19:37:28,737 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:37:28,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446310760] [2021-12-06 19:37:28,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446310760] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:37:28,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74537666] [2021-12-06 19:37:28,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:37:28,737 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:37:28,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:37:28,738 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:37:28,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-06 19:37:28,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:37:28,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 578 conjuncts, 119 conjunts are in the unsatisfiable core [2021-12-06 19:37:28,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:37:28,945 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 19:37:28,945 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 9 treesize of output 15 [2021-12-06 19:37:28,953 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 19:37:28,953 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 9 treesize of output 15 [2021-12-06 19:37:31,747 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 69 proven. 28 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-06 19:37:31,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:37:43,225 WARN L227 SmtUtils]: Spent 10.11s on a formula simplification that was a NOOP. DAG size: 26 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 19:37:53,547 WARN L227 SmtUtils]: Spent 10.17s on a formula simplification that was a NOOP. DAG size: 29 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 19:37:59,020 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-12-06 19:37:59,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74537666] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:37:59,020 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:37:59,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 31, 25] total 68 [2021-12-06 19:37:59,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018789557] [2021-12-06 19:37:59,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:37:59,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-12-06 19:37:59,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:37:59,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-12-06 19:37:59,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=4268, Unknown=0, NotChecked=0, Total=4556 [2021-12-06 19:37:59,023 INFO L87 Difference]: Start difference. First operand 329 states and 406 transitions. Second operand has 68 states, 64 states have (on average 2.8125) internal successors, (180), 58 states have internal predecessors, (180), 20 states have call successors, (40), 6 states have call predecessors, (40), 17 states have return successors, (38), 20 states have call predecessors, (38), 19 states have call successors, (38) [2021-12-06 19:38:07,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:38:07,381 INFO L93 Difference]: Finished difference Result 771 states and 1008 transitions. [2021-12-06 19:38:07,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-12-06 19:38:07,381 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 64 states have (on average 2.8125) internal successors, (180), 58 states have internal predecessors, (180), 20 states have call successors, (40), 6 states have call predecessors, (40), 17 states have return successors, (38), 20 states have call predecessors, (38), 19 states have call successors, (38) Word has length 126 [2021-12-06 19:38:07,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:38:07,384 INFO L225 Difference]: With dead ends: 771 [2021-12-06 19:38:07,384 INFO L226 Difference]: Without dead ends: 660 [2021-12-06 19:38:07,387 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 240 SyntacticMatches, 4 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2800 ImplicationChecksByTransitivity, 35.0s TimeCoverageRelationStatistics Valid=740, Invalid=9765, Unknown=1, NotChecked=0, Total=10506 [2021-12-06 19:38:07,388 INFO L933 BasicCegarLoop]: 123 mSDtfsCounter, 246 mSDsluCounter, 3690 mSDsCounter, 0 mSdLazyCounter, 2421 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 3813 SdHoareTripleChecker+Invalid, 3281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 2421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 737 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-06 19:38:07,388 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 3813 Invalid, 3281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 2421 Invalid, 0 Unknown, 737 Unchecked, 1.9s Time] [2021-12-06 19:38:07,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2021-12-06 19:38:07,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 543. [2021-12-06 19:38:07,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 543 states, 417 states have (on average 1.2182254196642686) internal successors, (508), 423 states have internal predecessors, (508), 69 states have call successors, (69), 37 states have call predecessors, (69), 56 states have return successors, (118), 82 states have call predecessors, (118), 68 states have call successors, (118) [2021-12-06 19:38:07,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 695 transitions. [2021-12-06 19:38:07,438 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 695 transitions. Word has length 126 [2021-12-06 19:38:07,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:38:07,438 INFO L470 AbstractCegarLoop]: Abstraction has 543 states and 695 transitions. [2021-12-06 19:38:07,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 64 states have (on average 2.8125) internal successors, (180), 58 states have internal predecessors, (180), 20 states have call successors, (40), 6 states have call predecessors, (40), 17 states have return successors, (38), 20 states have call predecessors, (38), 19 states have call successors, (38) [2021-12-06 19:38:07,438 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 695 transitions. [2021-12-06 19:38:07,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-12-06 19:38:07,440 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:38:07,440 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:38:07,461 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-12-06 19:38:07,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:38:07,640 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:38:07,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:38:07,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1060910717, now seen corresponding path program 1 times [2021-12-06 19:38:07,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:38:07,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126828873] [2021-12-06 19:38:07,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:38:07,641 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:38:07,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:38:07,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 19:38:07,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:38:07,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:38:07,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:38:07,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 19:38:07,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:38:07,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 19:38:07,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:38:07,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-06 19:38:07,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:38:07,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-06 19:38:07,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:38:07,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 19:38:07,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:38:07,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 19:38:07,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:38:07,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-06 19:38:07,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:38:07,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-06 19:38:07,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:38:07,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 19:38:07,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:38:07,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-06 19:38:07,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:38:07,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-06 19:38:07,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:38:07,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 19:38:07,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:38:07,976 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 17 proven. 24 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-12-06 19:38:07,976 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:38:07,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126828873] [2021-12-06 19:38:07,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126828873] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:38:07,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450773871] [2021-12-06 19:38:07,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:38:07,977 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:38:07,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:38:07,977 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:38:07,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-06 19:38:08,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:38:08,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 569 conjuncts, 76 conjunts are in the unsatisfiable core [2021-12-06 19:38:08,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:38:08,170 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 19:38:08,170 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 9 treesize of output 15 [2021-12-06 19:38:08,180 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 19:38:08,180 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 9 treesize of output 15 [2021-12-06 19:38:10,020 WARN L860 $PredicateComparison]: unable to prove that (or (exists ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_24| Int) (|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_26| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_24|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_26|) 0))) (exists ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_24| Int) (|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_26| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_24|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_26|) 0)))) is different from true [2021-12-06 19:38:11,407 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 68 proven. 17 refuted. 0 times theorem prover too weak. 26 trivial. 7 not checked. [2021-12-06 19:38:11,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:38:12,256 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-12-06 19:38:12,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450773871] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:38:12,257 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:38:12,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 22, 16] total 41 [2021-12-06 19:38:12,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212616036] [2021-12-06 19:38:12,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:38:12,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-12-06 19:38:12,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:38:12,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-12-06 19:38:12,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1428, Unknown=1, NotChecked=76, Total=1640 [2021-12-06 19:38:12,258 INFO L87 Difference]: Start difference. First operand 543 states and 695 transitions. Second operand has 41 states, 40 states have (on average 3.7) internal successors, (148), 40 states have internal predecessors, (148), 14 states have call successors, (30), 5 states have call predecessors, (30), 9 states have return successors, (28), 12 states have call predecessors, (28), 13 states have call successors, (28) [2021-12-06 19:38:19,482 WARN L227 SmtUtils]: Spent 5.17s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 19:38:28,301 WARN L227 SmtUtils]: Spent 5.30s on a formula simplification that was a NOOP. DAG size: 28 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 19:38:37,147 WARN L227 SmtUtils]: Spent 5.33s on a formula simplification that was a NOOP. DAG size: 28 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 19:38:38,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:38:38,218 INFO L93 Difference]: Finished difference Result 1154 states and 1556 transitions. [2021-12-06 19:38:38,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-06 19:38:38,219 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 3.7) internal successors, (148), 40 states have internal predecessors, (148), 14 states have call successors, (30), 5 states have call predecessors, (30), 9 states have return successors, (28), 12 states have call predecessors, (28), 13 states have call successors, (28) Word has length 126 [2021-12-06 19:38:38,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:38:38,222 INFO L225 Difference]: With dead ends: 1154 [2021-12-06 19:38:38,222 INFO L226 Difference]: Without dead ends: 741 [2021-12-06 19:38:38,224 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 253 SyntacticMatches, 16 SemanticMatches, 61 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 943 ImplicationChecksByTransitivity, 28.5s TimeCoverageRelationStatistics Valid=395, Invalid=3385, Unknown=6, NotChecked=120, Total=3906 [2021-12-06 19:38:38,224 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 284 mSDsluCounter, 2016 mSDsCounter, 0 mSdLazyCounter, 949 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 2149 SdHoareTripleChecker+Invalid, 1457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 949 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 427 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 19:38:38,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [303 Valid, 2149 Invalid, 1457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 949 Invalid, 0 Unknown, 427 Unchecked, 0.6s Time] [2021-12-06 19:38:38,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2021-12-06 19:38:38,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 602. [2021-12-06 19:38:38,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 602 states, 465 states have (on average 1.2086021505376343) internal successors, (562), 474 states have internal predecessors, (562), 73 states have call successors, (73), 39 states have call predecessors, (73), 63 states have return successors, (133), 88 states have call predecessors, (133), 72 states have call successors, (133) [2021-12-06 19:38:38,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 768 transitions. [2021-12-06 19:38:38,282 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 768 transitions. Word has length 126 [2021-12-06 19:38:38,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:38:38,282 INFO L470 AbstractCegarLoop]: Abstraction has 602 states and 768 transitions. [2021-12-06 19:38:38,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 3.7) internal successors, (148), 40 states have internal predecessors, (148), 14 states have call successors, (30), 5 states have call predecessors, (30), 9 states have return successors, (28), 12 states have call predecessors, (28), 13 states have call successors, (28) [2021-12-06 19:38:38,283 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 768 transitions. [2021-12-06 19:38:38,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-12-06 19:38:38,284 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:38:38,284 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-06 19:38:38,305 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-12-06 19:38:38,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:38:38,485 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:38:38,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:38:38,485 INFO L85 PathProgramCache]: Analyzing trace with hash 49793467, now seen corresponding path program 1 times [2021-12-06 19:38:38,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:38:38,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094793238] [2021-12-06 19:38:38,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:38:38,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:38:38,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:38:38,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 19:38:38,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:38:38,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:38:38,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:38:38,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 19:38:38,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:38:38,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 19:38:38,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:38:38,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-06 19:38:38,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:38:38,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-06 19:38:38,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:38:38,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 19:38:38,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:38:38,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 19:38:38,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:38:38,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-06 19:38:38,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:38:38,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-06 19:38:38,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:38:38,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 19:38:38,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:38:38,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-06 19:38:38,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:38:38,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-06 19:38:38,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:38:38,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 19:38:38,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:38:38,737 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-06 19:38:38,737 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:38:38,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094793238] [2021-12-06 19:38:38,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094793238] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:38:38,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130573760] [2021-12-06 19:38:38,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:38:38,738 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:38:38,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:38:38,738 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:38:38,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-06 19:38:38,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:38:38,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-06 19:38:38,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:38:39,121 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-06 19:38:39,121 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:38:39,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130573760] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:38:39,121 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:38:39,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [12] total 22 [2021-12-06 19:38:39,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479673369] [2021-12-06 19:38:39,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:38:39,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-06 19:38:39,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:38:39,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-06 19:38:39,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=413, Unknown=0, NotChecked=0, Total=462 [2021-12-06 19:38:39,123 INFO L87 Difference]: Start difference. First operand 602 states and 768 transitions. Second operand has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 11 states have internal predecessors, (68), 5 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2021-12-06 19:38:39,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:38:39,552 INFO L93 Difference]: Finished difference Result 1058 states and 1343 transitions. [2021-12-06 19:38:39,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-06 19:38:39,553 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 11 states have internal predecessors, (68), 5 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) Word has length 126 [2021-12-06 19:38:39,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:38:39,554 INFO L225 Difference]: With dead ends: 1058 [2021-12-06 19:38:39,555 INFO L226 Difference]: Without dead ends: 369 [2021-12-06 19:38:39,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2021-12-06 19:38:39,556 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 191 mSDsluCounter, 742 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 836 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 19:38:39,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 836 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 19:38:39,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-12-06 19:38:39,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 343. [2021-12-06 19:38:39,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 259 states have (on average 1.1428571428571428) internal successors, (296), 263 states have internal predecessors, (296), 50 states have call successors, (50), 28 states have call predecessors, (50), 33 states have return successors, (57), 51 states have call predecessors, (57), 49 states have call successors, (57) [2021-12-06 19:38:39,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 403 transitions. [2021-12-06 19:38:39,583 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 403 transitions. Word has length 126 [2021-12-06 19:38:39,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:38:39,583 INFO L470 AbstractCegarLoop]: Abstraction has 343 states and 403 transitions. [2021-12-06 19:38:39,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 11 states have internal predecessors, (68), 5 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2021-12-06 19:38:39,583 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 403 transitions. [2021-12-06 19:38:39,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-12-06 19:38:39,584 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:38:39,584 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:38:39,605 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-12-06 19:38:39,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:38:39,785 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:38:39,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:38:39,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1468779738, now seen corresponding path program 2 times [2021-12-06 19:38:39,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:38:39,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542970951] [2021-12-06 19:38:39,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:38:39,786 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:38:39,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:38:39,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 19:38:39,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:38:39,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:38:39,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:38:39,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 19:38:39,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:38:40,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 19:38:40,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:38:40,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-06 19:38:40,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:38:40,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-06 19:38:40,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:38:40,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 19:38:40,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:38:40,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 19:38:40,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:38:40,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-06 19:38:40,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:38:40,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-06 19:38:40,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:38:40,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 19:38:40,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:38:40,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-06 19:38:40,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:38:40,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-06 19:38:40,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:38:40,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 19:38:40,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:38:40,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 19:38:40,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:38:40,701 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 18 proven. 45 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-12-06 19:38:40,701 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:38:40,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542970951] [2021-12-06 19:38:40,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542970951] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:38:40,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168965170] [2021-12-06 19:38:40,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 19:38:40,701 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:38:40,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:38:40,702 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:38:40,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ecaf5fb-a24a-4f5b-8e3f-52476e8facce/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-06 19:38:40,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 19:38:40,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:38:40,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 618 conjuncts, 168 conjunts are in the unsatisfiable core [2021-12-06 19:38:40,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:38:40,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 19:38:41,026 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2021-12-06 19:38:41,036 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 19:38:41,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2021-12-06 19:38:41,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 19:38:41,051 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 19:38:41,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-06 19:38:41,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2021-12-06 19:38:41,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-06 19:38:41,160 INFO L354 Elim1Store]: treesize reduction 38, result has 22.4 percent of original size [2021-12-06 19:38:41,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 94 treesize of output 83 [2021-12-06 19:38:41,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 67 [2021-12-06 19:38:41,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:38:41,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 23 [2021-12-06 19:38:41,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 18 [2021-12-06 19:38:41,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-12-06 19:38:41,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2021-12-06 19:38:41,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-12-06 19:38:45,449 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 73 proven. 59 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-06 19:38:45,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:38:47,919 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2270 (Array Int Int)) (v_ArrVal_2268 (Array Int Int)) (v_ArrVal_2267 (Array Int Int)) (v_ArrVal_2272 (Array Int Int))) (let ((.cse7 (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24))) (let ((.cse4 (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_2268) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_2267) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse7 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset|))) (.cse0 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_2272) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_2270) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse7 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|)))) (let ((.cse3 (select (select .cse0 |c_ULTIMATE.start_aws_linked_list_back_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_back_harness_~#list~0#1.offset|)) (.cse5 (select (select .cse4 |c_ULTIMATE.start_aws_linked_list_back_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_back_harness_~#list~0#1.offset|))) (let ((.cse6 (select (select .cse4 .cse3) .cse5)) (.cse1 (select (select .cse0 .cse3) .cse5))) (or (let ((.cse2 (+ 8 .cse6))) (and (= (select (select .cse0 .cse1) .cse2) .cse3) (= (select (select .cse4 .cse1) .cse2) .cse5))) (not (= (+ 16 |c_ULTIMATE.start_aws_linked_list_back_harness_~#list~0#1.offset|) .cse6)) (not (= .cse1 |c_ULTIMATE.start_aws_linked_list_back_harness_~#list~0#1.base|)))))))) is different from false [2021-12-06 19:38:48,039 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:38:48,039 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 814 treesize of output 646 [2021-12-06 19:38:48,047 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:38:48,047 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 858 treesize of output 690 [2021-12-06 19:38:49,780 INFO L354 Elim1Store]: treesize reduction 58, result has 92.3 percent of original size [2021-12-06 19:38:49,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 24 new quantified variables, introduced 91 case distinctions, treesize of input 83488 treesize of output 66006 [2021-12-06 19:40:40,755 WARN L227 SmtUtils]: Spent 1.82m on a formula simplification. DAG size of input: 2474 DAG size of output: 2366 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-12-06 19:40:40,761 INFO L354 Elim1Store]: treesize reduction 338, result has 96.5 percent of original size [2021-12-06 19:40:40,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 35 select indices, 35 select index equivalence classes, 0 disjoint index pairs (out of 595 index pairs), introduced 49 new quantified variables, introduced 595 case distinctions, treesize of input 3706341 treesize of output 3285486 [2021-12-06 19:41:08,876 WARN L227 SmtUtils]: Spent 28.09s on a formula simplification that was a NOOP. DAG size: 12178 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-06 19:41:36,208 WARN L227 SmtUtils]: Spent 27.20s on a formula simplification that was a NOOP. DAG size: 12007 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-06 19:41:39,157 INFO L244 Elim1Store]: Index analysis took 1418 ms [2021-12-06 19:44:11,640 WARN L227 SmtUtils]: Spent 2.54m on a formula simplification that was a NOOP. DAG size: 1953 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-12-06 19:44:11,641 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:44:11,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 31 select indices, 31 select index equivalence classes, 0 disjoint index pairs (out of 465 index pairs), introduced 42 new quantified variables, introduced 465 case distinctions, treesize of input 3280724 treesize of output 3063942 [2021-12-06 19:44:58,722 WARN L227 SmtUtils]: Spent 47.05s on a formula simplification that was a NOOP. DAG size: 13892 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-06 19:45:45,074 WARN L227 SmtUtils]: Spent 46.18s on a formula simplification that was a NOOP. DAG size: 13860 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-06 19:45:54,621 INFO L244 Elim1Store]: Index analysis took 6144 ms