./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_init_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b848b7a-cbfa-4984-8280-60c3ff1c534f/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b848b7a-cbfa-4984-8280-60c3ff1c534f/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b848b7a-cbfa-4984-8280-60c3ff1c534f/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b848b7a-cbfa-4984-8280-60c3ff1c534f/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_init_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b848b7a-cbfa-4984-8280-60c3ff1c534f/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b848b7a-cbfa-4984-8280-60c3ff1c534f/bin/uautomizer-ug76WZFUDN --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 5b917a1c951859368fb2463a158063964361d86aeab261c924186dc34055576d --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-6b4ec56 [2022-11-20 09:27:50,127 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 09:27:50,129 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 09:27:50,147 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 09:27:50,148 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 09:27:50,149 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 09:27:50,150 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 09:27:50,152 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 09:27:50,154 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 09:27:50,155 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 09:27:50,156 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 09:27:50,160 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 09:27:50,160 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 09:27:50,166 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 09:27:50,168 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 09:27:50,169 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 09:27:50,170 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 09:27:50,171 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 09:27:50,172 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 09:27:50,174 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 09:27:50,176 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 09:27:50,179 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 09:27:50,180 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 09:27:50,181 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 09:27:50,184 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 09:27:50,185 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 09:27:50,185 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 09:27:50,186 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 09:27:50,187 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 09:27:50,188 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 09:27:50,188 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 09:27:50,189 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 09:27:50,190 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 09:27:50,195 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 09:27:50,198 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 09:27:50,198 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 09:27:50,200 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 09:27:50,201 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 09:27:50,201 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 09:27:50,205 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 09:27:50,206 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 09:27:50,207 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b848b7a-cbfa-4984-8280-60c3ff1c534f/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-11-20 09:27:50,249 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 09:27:50,250 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 09:27:50,250 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 09:27:50,251 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 09:27:50,252 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 09:27:50,252 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 09:27:50,253 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 09:27:50,253 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 09:27:50,253 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 09:27:50,253 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 09:27:50,254 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 09:27:50,255 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 09:27:50,255 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 09:27:50,255 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 09:27:50,255 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 09:27:50,255 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 09:27:50,255 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 09:27:50,256 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 09:27:50,256 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 09:27:50,256 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 09:27:50,256 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 09:27:50,256 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 09:27:50,257 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 09:27:50,257 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 09:27:50,257 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 09:27:50,257 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 09:27:50,257 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 09:27:50,258 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 09:27:50,258 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 09:27:50,258 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 09:27:50,258 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_4b848b7a-cbfa-4984-8280-60c3ff1c534f/bin/uautomizer-ug76WZFUDN/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b848b7a-cbfa-4984-8280-60c3ff1c534f/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5b917a1c951859368fb2463a158063964361d86aeab261c924186dc34055576d [2022-11-20 09:27:50,619 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 09:27:50,649 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 09:27:50,653 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 09:27:50,655 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 09:27:50,656 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 09:27:50,657 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b848b7a-cbfa-4984-8280-60c3ff1c534f/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/aws-c-common/aws_linked_list_init_harness.i [2022-11-20 09:27:53,683 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 09:27:54,180 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 09:27:54,181 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b848b7a-cbfa-4984-8280-60c3ff1c534f/sv-benchmarks/c/aws-c-common/aws_linked_list_init_harness.i [2022-11-20 09:27:54,229 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b848b7a-cbfa-4984-8280-60c3ff1c534f/bin/uautomizer-ug76WZFUDN/data/b32f7234b/bb166ef100894482b08bf5b4ba68fd4b/FLAGde6bac4bd [2022-11-20 09:27:54,250 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b848b7a-cbfa-4984-8280-60c3ff1c534f/bin/uautomizer-ug76WZFUDN/data/b32f7234b/bb166ef100894482b08bf5b4ba68fd4b [2022-11-20 09:27:54,253 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 09:27:54,255 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 09:27:54,260 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 09:27:54,260 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 09:27:54,264 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 09:27:54,265 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:27:54" (1/1) ... [2022-11-20 09:27:54,266 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7eb878a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:54, skipping insertion in model container [2022-11-20 09:27:54,266 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:27:54" (1/1) ... [2022-11-20 09:27:54,273 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 09:27:54,396 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 09:27:54,747 WARN L237 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_4b848b7a-cbfa-4984-8280-60c3ff1c534f/sv-benchmarks/c/aws-c-common/aws_linked_list_init_harness.i[4494,4507] [2022-11-20 09:27:54,755 WARN L237 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_4b848b7a-cbfa-4984-8280-60c3ff1c534f/sv-benchmarks/c/aws-c-common/aws_linked_list_init_harness.i[4554,4567] [2022-11-20 09:27:55,623 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 09:27:55,625 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 09:27:55,627 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 09:27:55,628 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 09:27:55,632 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 09:27:55,646 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 09:27:55,650 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 09:27:55,655 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 09:27:55,655 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 09:27:55,657 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 09:27:55,658 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 09:27:55,659 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 09:27:55,660 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 09:27:56,035 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-20 09:27:56,036 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-20 09:27:56,037 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-20 09:27:56,038 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-20 09:27:56,040 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-20 09:27:56,041 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-20 09:27:56,041 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-20 09:27:56,042 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-20 09:27:56,043 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-20 09:27:56,048 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-20 09:27:56,200 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-20 09:27:56,222 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 09:27:56,239 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 09:27:56,254 WARN L237 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_4b848b7a-cbfa-4984-8280-60c3ff1c534f/sv-benchmarks/c/aws-c-common/aws_linked_list_init_harness.i[4494,4507] [2022-11-20 09:27:56,255 WARN L237 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_4b848b7a-cbfa-4984-8280-60c3ff1c534f/sv-benchmarks/c/aws-c-common/aws_linked_list_init_harness.i[4554,4567] [2022-11-20 09:27:56,308 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 09:27:56,310 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 09:27:56,318 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 09:27:56,319 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 09:27:56,320 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 09:27:56,329 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 09:27:56,330 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 09:27:56,331 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 09:27:56,331 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 09:27:56,332 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 09:27:56,333 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 09:27:56,339 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 09:27:56,339 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 09:27:56,434 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-20 09:27:56,435 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-20 09:27:56,436 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-20 09:27:56,437 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-20 09:27:56,445 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-20 09:27:56,446 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-20 09:27:56,449 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-20 09:27:56,450 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-20 09:27:56,452 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-20 09:27:56,452 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-20 09:27:56,501 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-20 09:27:56,539 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 09:27:56,884 INFO L208 MainTranslator]: Completed translation [2022-11-20 09:27:56,884 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:56 WrapperNode [2022-11-20 09:27:56,884 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 09:27:56,886 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 09:27:56,886 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 09:27:56,886 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 09:27:56,896 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:56" (1/1) ... [2022-11-20 09:27:56,979 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:56" (1/1) ... [2022-11-20 09:27:57,009 INFO L138 Inliner]: procedures = 679, calls = 1035, calls flagged for inlining = 50, calls inlined = 4, statements flattened = 92 [2022-11-20 09:27:57,010 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 09:27:57,010 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 09:27:57,011 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 09:27:57,011 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 09:27:57,020 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:56" (1/1) ... [2022-11-20 09:27:57,020 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:56" (1/1) ... [2022-11-20 09:27:57,023 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:56" (1/1) ... [2022-11-20 09:27:57,024 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:56" (1/1) ... [2022-11-20 09:27:57,034 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:56" (1/1) ... [2022-11-20 09:27:57,038 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:56" (1/1) ... [2022-11-20 09:27:57,042 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:56" (1/1) ... [2022-11-20 09:27:57,043 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:56" (1/1) ... [2022-11-20 09:27:57,047 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 09:27:57,048 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 09:27:57,048 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 09:27:57,049 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 09:27:57,049 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:56" (1/1) ... [2022-11-20 09:27:57,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 09:27:57,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b848b7a-cbfa-4984-8280-60c3ff1c534f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:27:57,082 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b848b7a-cbfa-4984-8280-60c3ff1c534f/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 09:27:57,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b848b7a-cbfa-4984-8280-60c3ff1c534f/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 09:27:57,142 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_init [2022-11-20 09:27:57,143 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_init [2022-11-20 09:27:57,143 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 09:27:57,143 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-20 09:27:57,143 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-20 09:27:57,143 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2022-11-20 09:27:57,143 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2022-11-20 09:27:57,144 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2022-11-20 09:27:57,144 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2022-11-20 09:27:57,145 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 09:27:57,145 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-20 09:27:57,146 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 09:27:57,146 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 09:27:57,146 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_empty [2022-11-20 09:27:57,146 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_empty [2022-11-20 09:27:57,147 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-20 09:27:57,147 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-20 09:27:57,147 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 09:27:57,147 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-20 09:27:57,147 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-20 09:27:57,147 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 09:27:57,459 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 09:27:57,461 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 09:27:57,726 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 09:27:57,735 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 09:27:57,736 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-20 09:27:57,738 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:27:57 BoogieIcfgContainer [2022-11-20 09:27:57,738 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 09:27:57,741 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 09:27:57,741 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 09:27:57,745 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 09:27:57,745 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 09:27:54" (1/3) ... [2022-11-20 09:27:57,746 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@592df6f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:27:57, skipping insertion in model container [2022-11-20 09:27:57,746 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:56" (2/3) ... [2022-11-20 09:27:57,746 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@592df6f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:27:57, skipping insertion in model container [2022-11-20 09:27:57,747 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:27:57" (3/3) ... [2022-11-20 09:27:57,748 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_linked_list_init_harness.i [2022-11-20 09:27:57,769 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 09:27:57,769 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 09:27:57,833 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 09:27:57,879 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@53f2e82, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 09:27:57,882 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 09:27:57,887 INFO L276 IsEmpty]: Start isEmpty. Operand has 61 states, 43 states have (on average 1.3488372093023255) internal successors, (58), 44 states have internal predecessors, (58), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-20 09:27:57,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-20 09:27:57,898 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:27:57,899 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:27:57,899 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:27:57,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:57,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1017333715, now seen corresponding path program 1 times [2022-11-20 09:27:57,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:57,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625961711] [2022-11-20 09:27:57,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:57,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:58,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:58,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-20 09:27:58,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:58,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-20 09:27:58,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:58,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:58,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:27:58,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625961711] [2022-11-20 09:27:58,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625961711] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:27:58,471 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:27:58,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 09:27:58,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141545549] [2022-11-20 09:27:58,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:27:58,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 09:27:58,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:27:58,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 09:27:58,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 09:27:58,529 INFO L87 Difference]: Start difference. First operand has 61 states, 43 states have (on average 1.3488372093023255) internal successors, (58), 44 states have internal predecessors, (58), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 2 states, 2 states have (on average 10.0) internal successors, (20), 2 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 09:27:58,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:27:58,572 INFO L93 Difference]: Finished difference Result 117 states and 158 transitions. [2022-11-20 09:27:58,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 09:27:58,575 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 10.0) internal successors, (20), 2 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2022-11-20 09:27:58,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:27:58,588 INFO L225 Difference]: With dead ends: 117 [2022-11-20 09:27:58,588 INFO L226 Difference]: Without dead ends: 56 [2022-11-20 09:27:58,598 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 09:27:58,602 INFO L413 NwaCegarLoop]: 75 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, 75 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 09:27:58,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 09:27:58,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-11-20 09:27:58,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-11-20 09:27:58,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 39 states have (on average 1.3076923076923077) internal successors, (51), 40 states have internal predecessors, (51), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-20 09:27:58,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2022-11-20 09:27:58,659 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 26 [2022-11-20 09:27:58,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:27:58,659 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2022-11-20 09:27:58,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 10.0) internal successors, (20), 2 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 09:27:58,660 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2022-11-20 09:27:58,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-20 09:27:58,663 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:27:58,664 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:27:58,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 09:27:58,669 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:27:58,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:58,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1834982165, now seen corresponding path program 1 times [2022-11-20 09:27:58,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:58,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467328507] [2022-11-20 09:27:58,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:58,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:58,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:59,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-20 09:27:59,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:59,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-20 09:27:59,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:59,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:59,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:27:59,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467328507] [2022-11-20 09:27:59,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467328507] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:27:59,994 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:27:59,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-20 09:27:59,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453885911] [2022-11-20 09:27:59,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:27:59,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 09:27:59,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:27:59,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 09:27:59,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-20 09:27:59,997 INFO L87 Difference]: Start difference. First operand 56 states and 70 transitions. Second operand has 9 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 09:28:00,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:28:00,341 INFO L93 Difference]: Finished difference Result 108 states and 136 transitions. [2022-11-20 09:28:00,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:28:00,342 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2022-11-20 09:28:00,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:28:00,348 INFO L225 Difference]: With dead ends: 108 [2022-11-20 09:28:00,348 INFO L226 Difference]: Without dead ends: 59 [2022-11-20 09:28:00,349 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-11-20 09:28:00,350 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 31 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 09:28:00,351 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 320 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 09:28:00,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-11-20 09:28:00,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2022-11-20 09:28:00,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 41 states have (on average 1.3170731707317074) internal successors, (54), 43 states have internal predecessors, (54), 10 states have call successors, (10), 6 states have call predecessors, (10), 7 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2022-11-20 09:28:00,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 74 transitions. [2022-11-20 09:28:00,376 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 74 transitions. Word has length 26 [2022-11-20 09:28:00,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:28:00,377 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 74 transitions. [2022-11-20 09:28:00,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 09:28:00,378 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 74 transitions. [2022-11-20 09:28:00,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-20 09:28:00,379 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:28:00,379 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:28:00,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 09:28:00,381 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:28:00,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:00,382 INFO L85 PathProgramCache]: Analyzing trace with hash 1650638505, now seen corresponding path program 1 times [2022-11-20 09:28:00,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:00,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954084934] [2022-11-20 09:28:00,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:00,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:00,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:00,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-20 09:28:00,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:00,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-20 09:28:00,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:01,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:01,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:28:01,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954084934] [2022-11-20 09:28:01,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954084934] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:28:01,151 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:28:01,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-20 09:28:01,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508928130] [2022-11-20 09:28:01,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:28:01,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:28:01,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:28:01,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:28:01,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:28:01,154 INFO L87 Difference]: Start difference. First operand 59 states and 74 transitions. Second operand has 10 states, 8 states have (on average 2.5) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 09:28:01,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:28:01,585 INFO L93 Difference]: Finished difference Result 124 states and 161 transitions. [2022-11-20 09:28:01,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 09:28:01,586 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.5) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2022-11-20 09:28:01,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:28:01,589 INFO L225 Difference]: With dead ends: 124 [2022-11-20 09:28:01,589 INFO L226 Difference]: Without dead ends: 72 [2022-11-20 09:28:01,594 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-11-20 09:28:01,601 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 80 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 09:28:01,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 409 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 09:28:01,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-11-20 09:28:01,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 69. [2022-11-20 09:28:01,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 50 states have (on average 1.38) internal successors, (69), 52 states have internal predecessors, (69), 11 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2022-11-20 09:28:01,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 91 transitions. [2022-11-20 09:28:01,621 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 91 transitions. Word has length 26 [2022-11-20 09:28:01,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:28:01,622 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 91 transitions. [2022-11-20 09:28:01,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.5) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 09:28:01,622 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 91 transitions. [2022-11-20 09:28:01,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-20 09:28:01,624 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:28:01,624 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:28:01,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 09:28:01,625 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:28:01,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:01,625 INFO L85 PathProgramCache]: Analyzing trace with hash 1257611495, now seen corresponding path program 1 times [2022-11-20 09:28:01,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:01,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5603096] [2022-11-20 09:28:01,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:01,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:01,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:02,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-20 09:28:02,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:02,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-20 09:28:02,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:02,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:02,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:28:02,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5603096] [2022-11-20 09:28:02,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5603096] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:28:02,455 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:28:02,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-20 09:28:02,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911410473] [2022-11-20 09:28:02,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:28:02,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:28:02,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:28:02,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:28:02,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:28:02,457 INFO L87 Difference]: Start difference. First operand 69 states and 91 transitions. Second operand has 10 states, 8 states have (on average 2.5) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 09:28:02,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:28:02,817 INFO L93 Difference]: Finished difference Result 152 states and 207 transitions. [2022-11-20 09:28:02,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 09:28:02,818 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.5) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2022-11-20 09:28:02,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:28:02,820 INFO L225 Difference]: With dead ends: 152 [2022-11-20 09:28:02,820 INFO L226 Difference]: Without dead ends: 90 [2022-11-20 09:28:02,821 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-11-20 09:28:02,822 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 90 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 09:28:02,822 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 375 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 09:28:02,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-11-20 09:28:02,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 73. [2022-11-20 09:28:02,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 54 states have (on average 1.3888888888888888) internal successors, (75), 56 states have internal predecessors, (75), 11 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2022-11-20 09:28:02,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 97 transitions. [2022-11-20 09:28:02,835 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 97 transitions. Word has length 26 [2022-11-20 09:28:02,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:28:02,836 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 97 transitions. [2022-11-20 09:28:02,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.5) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 09:28:02,836 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 97 transitions. [2022-11-20 09:28:02,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-20 09:28:02,837 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:28:02,838 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:28:02,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 09:28:02,838 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:28:02,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:02,839 INFO L85 PathProgramCache]: Analyzing trace with hash 1515776933, now seen corresponding path program 1 times [2022-11-20 09:28:02,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:02,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544461789] [2022-11-20 09:28:02,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:02,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:02,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:03,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-20 09:28:03,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:03,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-20 09:28:03,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:03,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:03,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:28:03,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544461789] [2022-11-20 09:28:03,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544461789] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:28:03,185 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:28:03,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-20 09:28:03,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618590056] [2022-11-20 09:28:03,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:28:03,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:28:03,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:28:03,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:28:03,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:28:03,187 INFO L87 Difference]: Start difference. First operand 73 states and 97 transitions. Second operand has 10 states, 8 states have (on average 2.5) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 09:28:03,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:28:03,522 INFO L93 Difference]: Finished difference Result 176 states and 245 transitions. [2022-11-20 09:28:03,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 09:28:03,523 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.5) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2022-11-20 09:28:03,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:28:03,525 INFO L225 Difference]: With dead ends: 176 [2022-11-20 09:28:03,525 INFO L226 Difference]: Without dead ends: 110 [2022-11-20 09:28:03,526 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-11-20 09:28:03,527 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 78 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 480 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 09:28:03,527 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 480 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 09:28:03,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-11-20 09:28:03,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 77. [2022-11-20 09:28:03,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 58 states have (on average 1.396551724137931) internal successors, (81), 60 states have internal predecessors, (81), 11 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2022-11-20 09:28:03,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 103 transitions. [2022-11-20 09:28:03,546 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 103 transitions. Word has length 26 [2022-11-20 09:28:03,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:28:03,546 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 103 transitions. [2022-11-20 09:28:03,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.5) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 09:28:03,547 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 103 transitions. [2022-11-20 09:28:03,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-20 09:28:03,548 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:28:03,548 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:28:03,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 09:28:03,548 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:28:03,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:03,549 INFO L85 PathProgramCache]: Analyzing trace with hash 504659683, now seen corresponding path program 1 times [2022-11-20 09:28:03,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:03,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127980529] [2022-11-20 09:28:03,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:03,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:03,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:03,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-20 09:28:03,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:03,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-20 09:28:03,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:03,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:03,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:28:03,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127980529] [2022-11-20 09:28:03,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127980529] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:28:03,761 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:28:03,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-20 09:28:03,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86380603] [2022-11-20 09:28:03,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:28:03,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 09:28:03,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:28:03,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 09:28:03,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-20 09:28:03,763 INFO L87 Difference]: Start difference. First operand 77 states and 103 transitions. Second operand has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 09:28:03,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:28:03,855 INFO L93 Difference]: Finished difference Result 173 states and 239 transitions. [2022-11-20 09:28:03,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 09:28:03,856 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2022-11-20 09:28:03,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:28:03,857 INFO L225 Difference]: With dead ends: 173 [2022-11-20 09:28:03,857 INFO L226 Difference]: Without dead ends: 70 [2022-11-20 09:28:03,858 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-20 09:28:03,859 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 45 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 09:28:03,859 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 380 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 09:28:03,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-11-20 09:28:03,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2022-11-20 09:28:03,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 51 states have (on average 1.3529411764705883) internal successors, (69), 53 states have internal predecessors, (69), 11 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2022-11-20 09:28:03,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 91 transitions. [2022-11-20 09:28:03,870 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 91 transitions. Word has length 26 [2022-11-20 09:28:03,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:28:03,871 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 91 transitions. [2022-11-20 09:28:03,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 09:28:03,871 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 91 transitions. [2022-11-20 09:28:03,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-20 09:28:03,872 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:28:03,873 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:28:03,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-20 09:28:03,873 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:28:03,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:03,874 INFO L85 PathProgramCache]: Analyzing trace with hash -1687611897, now seen corresponding path program 1 times [2022-11-20 09:28:03,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:03,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018454233] [2022-11-20 09:28:03,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:03,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:03,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:03,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-20 09:28:03,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:03,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-20 09:28:03,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:04,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:04,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:28:04,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018454233] [2022-11-20 09:28:04,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018454233] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:28:04,123 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:28:04,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-20 09:28:04,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495756786] [2022-11-20 09:28:04,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:28:04,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 09:28:04,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:28:04,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 09:28:04,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-20 09:28:04,125 INFO L87 Difference]: Start difference. First operand 70 states and 91 transitions. Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 09:28:04,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:28:04,268 INFO L93 Difference]: Finished difference Result 135 states and 178 transitions. [2022-11-20 09:28:04,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 09:28:04,269 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2022-11-20 09:28:04,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:28:04,270 INFO L225 Difference]: With dead ends: 135 [2022-11-20 09:28:04,270 INFO L226 Difference]: Without dead ends: 72 [2022-11-20 09:28:04,271 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:28:04,272 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 39 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 09:28:04,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 322 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 09:28:04,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-11-20 09:28:04,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2022-11-20 09:28:04,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 51 states have (on average 1.3137254901960784) internal successors, (67), 53 states have internal predecessors, (67), 11 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2022-11-20 09:28:04,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 89 transitions. [2022-11-20 09:28:04,283 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 89 transitions. Word has length 28 [2022-11-20 09:28:04,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:28:04,283 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 89 transitions. [2022-11-20 09:28:04,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 09:28:04,284 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 89 transitions. [2022-11-20 09:28:04,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-20 09:28:04,285 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:28:04,285 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:28:04,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-20 09:28:04,285 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:28:04,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:04,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1850407916, now seen corresponding path program 1 times [2022-11-20 09:28:04,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:04,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502754231] [2022-11-20 09:28:04,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:04,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:04,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:04,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-20 09:28:04,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:04,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-20 09:28:04,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:04,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:04,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:28:04,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502754231] [2022-11-20 09:28:04,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502754231] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:28:04,478 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:28:04,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 09:28:04,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941359789] [2022-11-20 09:28:04,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:28:04,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 09:28:04,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:28:04,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 09:28:04,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 09:28:04,480 INFO L87 Difference]: Start difference. First operand 70 states and 89 transitions. Second operand has 6 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 09:28:04,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:28:04,571 INFO L93 Difference]: Finished difference Result 143 states and 185 transitions. [2022-11-20 09:28:04,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 09:28:04,572 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2022-11-20 09:28:04,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:28:04,573 INFO L225 Difference]: With dead ends: 143 [2022-11-20 09:28:04,573 INFO L226 Difference]: Without dead ends: 80 [2022-11-20 09:28:04,574 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-20 09:28:04,575 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 15 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 09:28:04,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 266 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 09:28:04,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-11-20 09:28:04,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 72. [2022-11-20 09:28:04,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 53 states have (on average 1.3018867924528301) internal successors, (69), 55 states have internal predecessors, (69), 11 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2022-11-20 09:28:04,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 91 transitions. [2022-11-20 09:28:04,589 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 91 transitions. Word has length 30 [2022-11-20 09:28:04,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:28:04,590 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 91 transitions. [2022-11-20 09:28:04,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 09:28:04,590 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 91 transitions. [2022-11-20 09:28:04,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-20 09:28:04,591 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:28:04,591 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:28:04,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-20 09:28:04,592 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:28:04,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:04,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1395309347, now seen corresponding path program 1 times [2022-11-20 09:28:04,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:04,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603246905] [2022-11-20 09:28:04,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:04,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:04,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:04,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-20 09:28:04,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:04,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-20 09:28:04,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:04,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:04,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:28:04,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603246905] [2022-11-20 09:28:04,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603246905] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:28:04,771 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:28:04,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 09:28:04,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771295097] [2022-11-20 09:28:04,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:28:04,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 09:28:04,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:28:04,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 09:28:04,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 09:28:04,773 INFO L87 Difference]: Start difference. First operand 72 states and 91 transitions. Second operand has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 09:28:04,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:28:04,856 INFO L93 Difference]: Finished difference Result 149 states and 195 transitions. [2022-11-20 09:28:04,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 09:28:04,856 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 31 [2022-11-20 09:28:04,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:28:04,857 INFO L225 Difference]: With dead ends: 149 [2022-11-20 09:28:04,858 INFO L226 Difference]: Without dead ends: 84 [2022-11-20 09:28:04,858 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-20 09:28:04,859 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 12 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 09:28:04,859 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 276 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 09:28:04,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-11-20 09:28:04,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 74. [2022-11-20 09:28:04,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 55 states have (on average 1.290909090909091) internal successors, (71), 57 states have internal predecessors, (71), 11 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2022-11-20 09:28:04,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 93 transitions. [2022-11-20 09:28:04,870 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 93 transitions. Word has length 31 [2022-11-20 09:28:04,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:28:04,871 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 93 transitions. [2022-11-20 09:28:04,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 09:28:04,871 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 93 transitions. [2022-11-20 09:28:04,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-20 09:28:04,872 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:28:04,872 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:28:04,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-20 09:28:04,873 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:28:04,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:04,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1854431003, now seen corresponding path program 1 times [2022-11-20 09:28:04,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:04,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32305339] [2022-11-20 09:28:04,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:04,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:04,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:05,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-20 09:28:05,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:05,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-20 09:28:05,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:06,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-20 09:28:06,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:06,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:06,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:28:06,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32305339] [2022-11-20 09:28:06,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32305339] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:28:06,601 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:28:06,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-20 09:28:06,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802417568] [2022-11-20 09:28:06,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:28:06,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 09:28:06,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:28:06,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 09:28:06,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2022-11-20 09:28:06,603 INFO L87 Difference]: Start difference. First operand 74 states and 93 transitions. Second operand has 14 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-20 09:28:07,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:28:07,197 INFO L93 Difference]: Finished difference Result 164 states and 211 transitions. [2022-11-20 09:28:07,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 09:28:07,198 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 39 [2022-11-20 09:28:07,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:28:07,199 INFO L225 Difference]: With dead ends: 164 [2022-11-20 09:28:07,199 INFO L226 Difference]: Without dead ends: 97 [2022-11-20 09:28:07,200 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-11-20 09:28:07,201 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 67 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 09:28:07,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 446 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 09:28:07,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-11-20 09:28:07,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 79. [2022-11-20 09:28:07,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 58 states have (on average 1.293103448275862) internal successors, (75), 61 states have internal predecessors, (75), 12 states have call successors, (12), 6 states have call predecessors, (12), 8 states have return successors, (15), 11 states have call predecessors, (15), 11 states have call successors, (15) [2022-11-20 09:28:07,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 102 transitions. [2022-11-20 09:28:07,215 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 102 transitions. Word has length 39 [2022-11-20 09:28:07,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:28:07,216 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 102 transitions. [2022-11-20 09:28:07,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-20 09:28:07,216 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 102 transitions. [2022-11-20 09:28:07,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-20 09:28:07,217 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:28:07,217 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:28:07,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-20 09:28:07,217 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:28:07,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:07,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1596265565, now seen corresponding path program 1 times [2022-11-20 09:28:07,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:07,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057972806] [2022-11-20 09:28:07,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:07,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:07,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:07,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-20 09:28:07,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:07,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-20 09:28:07,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:07,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-20 09:28:07,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:08,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:08,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:28:08,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057972806] [2022-11-20 09:28:08,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057972806] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:28:08,038 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:28:08,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-11-20 09:28:08,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880223574] [2022-11-20 09:28:08,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:28:08,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-20 09:28:08,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:28:08,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-20 09:28:08,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2022-11-20 09:28:08,041 INFO L87 Difference]: Start difference. First operand 79 states and 102 transitions. Second operand has 15 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 14 states have internal predecessors, (31), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-20 09:28:08,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:28:08,655 INFO L93 Difference]: Finished difference Result 182 states and 246 transitions. [2022-11-20 09:28:08,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-20 09:28:08,656 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 14 states have internal predecessors, (31), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 39 [2022-11-20 09:28:08,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:28:08,659 INFO L225 Difference]: With dead ends: 182 [2022-11-20 09:28:08,659 INFO L226 Difference]: Without dead ends: 110 [2022-11-20 09:28:08,660 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2022-11-20 09:28:08,661 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 131 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 09:28:08,661 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 451 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 09:28:08,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-11-20 09:28:08,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 91. [2022-11-20 09:28:08,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 68 states have (on average 1.2941176470588236) internal successors, (88), 73 states have internal predecessors, (88), 13 states have call successors, (13), 6 states have call predecessors, (13), 9 states have return successors, (19), 11 states have call predecessors, (19), 12 states have call successors, (19) [2022-11-20 09:28:08,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 120 transitions. [2022-11-20 09:28:08,696 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 120 transitions. Word has length 39 [2022-11-20 09:28:08,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:28:08,696 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 120 transitions. [2022-11-20 09:28:08,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 14 states have internal predecessors, (31), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-20 09:28:08,697 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 120 transitions. [2022-11-20 09:28:08,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-20 09:28:08,698 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:28:08,698 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:28:08,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-20 09:28:08,698 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:28:08,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:08,699 INFO L85 PathProgramCache]: Analyzing trace with hash 1687584481, now seen corresponding path program 1 times [2022-11-20 09:28:08,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:08,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663699558] [2022-11-20 09:28:08,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:08,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:08,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:08,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-20 09:28:08,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:08,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-20 09:28:08,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:08,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-20 09:28:08,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:08,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:08,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:28:08,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663699558] [2022-11-20 09:28:08,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663699558] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:28:08,997 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:28:08,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-20 09:28:08,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460192435] [2022-11-20 09:28:08,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:28:08,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 09:28:08,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:28:08,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 09:28:08,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-20 09:28:09,000 INFO L87 Difference]: Start difference. First operand 91 states and 120 transitions. Second operand has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-20 09:28:09,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:28:09,134 INFO L93 Difference]: Finished difference Result 186 states and 249 transitions. [2022-11-20 09:28:09,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 09:28:09,134 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2022-11-20 09:28:09,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:28:09,135 INFO L225 Difference]: With dead ends: 186 [2022-11-20 09:28:09,136 INFO L226 Difference]: Without dead ends: 94 [2022-11-20 09:28:09,136 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-20 09:28:09,137 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 20 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 09:28:09,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 342 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 09:28:09,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-11-20 09:28:09,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 86. [2022-11-20 09:28:09,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 64 states have (on average 1.28125) internal successors, (82), 68 states have internal predecessors, (82), 13 states have call successors, (13), 6 states have call predecessors, (13), 8 states have return successors, (15), 11 states have call predecessors, (15), 12 states have call successors, (15) [2022-11-20 09:28:09,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 110 transitions. [2022-11-20 09:28:09,153 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 110 transitions. Word has length 39 [2022-11-20 09:28:09,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:28:09,153 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 110 transitions. [2022-11-20 09:28:09,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-20 09:28:09,154 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 110 transitions. [2022-11-20 09:28:09,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-20 09:28:09,155 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:28:09,155 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:28:09,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-20 09:28:09,155 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:28:09,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:09,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1045188466, now seen corresponding path program 1 times [2022-11-20 09:28:09,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:09,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908742953] [2022-11-20 09:28:09,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:09,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:09,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:09,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-20 09:28:09,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:09,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-20 09:28:09,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:09,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-20 09:28:09,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:09,666 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:09,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:28:09,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908742953] [2022-11-20 09:28:09,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908742953] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:28:09,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877220941] [2022-11-20 09:28:09,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:09,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:28:09,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b848b7a-cbfa-4984-8280-60c3ff1c534f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:28:09,674 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b848b7a-cbfa-4984-8280-60c3ff1c534f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:28:09,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b848b7a-cbfa-4984-8280-60c3ff1c534f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 09:28:09,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:09,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-20 09:28:09,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:28:10,348 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:10,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:28:10,727 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-11-20 09:28:10,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2022-11-20 09:28:10,735 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-11-20 09:28:10,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 12 [2022-11-20 09:28:10,748 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:10,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877220941] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 09:28:10,748 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:28:10,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12, 11] total 23 [2022-11-20 09:28:10,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327832118] [2022-11-20 09:28:10,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:28:10,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 09:28:10,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:28:10,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 09:28:10,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2022-11-20 09:28:10,750 INFO L87 Difference]: Start difference. First operand 86 states and 110 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-20 09:28:11,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:28:11,013 INFO L93 Difference]: Finished difference Result 183 states and 238 transitions. [2022-11-20 09:28:11,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 09:28:11,013 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 41 [2022-11-20 09:28:11,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:28:11,015 INFO L225 Difference]: With dead ends: 183 [2022-11-20 09:28:11,015 INFO L226 Difference]: Without dead ends: 104 [2022-11-20 09:28:11,016 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2022-11-20 09:28:11,016 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 29 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 09:28:11,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 374 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 09:28:11,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-11-20 09:28:11,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 90. [2022-11-20 09:28:11,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 68 states have (on average 1.2941176470588236) internal successors, (88), 70 states have internal predecessors, (88), 13 states have call successors, (13), 6 states have call predecessors, (13), 8 states have return successors, (15), 13 states have call predecessors, (15), 12 states have call successors, (15) [2022-11-20 09:28:11,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 116 transitions. [2022-11-20 09:28:11,039 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 116 transitions. Word has length 41 [2022-11-20 09:28:11,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:28:11,039 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 116 transitions. [2022-11-20 09:28:11,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-20 09:28:11,039 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 116 transitions. [2022-11-20 09:28:11,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-20 09:28:11,040 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:28:11,040 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:28:11,052 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b848b7a-cbfa-4984-8280-60c3ff1c534f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 09:28:11,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b848b7a-cbfa-4984-8280-60c3ff1c534f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-20 09:28:11,246 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:28:11,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:11,247 INFO L85 PathProgramCache]: Analyzing trace with hash 964483973, now seen corresponding path program 1 times [2022-11-20 09:28:11,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:11,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100883560] [2022-11-20 09:28:11,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:11,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:11,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:11,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-20 09:28:11,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:11,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-20 09:28:11,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:11,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-20 09:28:11,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:11,475 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 09:28:11,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:28:11,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100883560] [2022-11-20 09:28:11,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100883560] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:28:11,476 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:28:11,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-20 09:28:11,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212441652] [2022-11-20 09:28:11,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:28:11,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 09:28:11,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:28:11,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 09:28:11,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-20 09:28:11,479 INFO L87 Difference]: Start difference. First operand 90 states and 116 transitions. Second operand has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-20 09:28:11,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:28:11,573 INFO L93 Difference]: Finished difference Result 106 states and 133 transitions. [2022-11-20 09:28:11,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 09:28:11,573 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 42 [2022-11-20 09:28:11,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:28:11,574 INFO L225 Difference]: With dead ends: 106 [2022-11-20 09:28:11,575 INFO L226 Difference]: Without dead ends: 104 [2022-11-20 09:28:11,575 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-11-20 09:28:11,576 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 10 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 445 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 09:28:11,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 445 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 09:28:11,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-11-20 09:28:11,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 99. [2022-11-20 09:28:11,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 74 states have (on average 1.2702702702702702) internal successors, (94), 77 states have internal predecessors, (94), 14 states have call successors, (14), 7 states have call predecessors, (14), 10 states have return successors, (18), 14 states have call predecessors, (18), 13 states have call successors, (18) [2022-11-20 09:28:11,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 126 transitions. [2022-11-20 09:28:11,594 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 126 transitions. Word has length 42 [2022-11-20 09:28:11,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:28:11,595 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 126 transitions. [2022-11-20 09:28:11,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-20 09:28:11,596 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 126 transitions. [2022-11-20 09:28:11,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-20 09:28:11,596 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:28:11,596 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-20 09:28:11,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-20 09:28:11,597 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:28:11,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:11,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1440497479, now seen corresponding path program 1 times [2022-11-20 09:28:11,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:11,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239963511] [2022-11-20 09:28:11,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:11,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:11,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:12,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-20 09:28:12,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:12,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-20 09:28:12,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:12,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-20 09:28:12,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:12,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-20 09:28:12,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:12,629 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 09:28:12,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:28:12,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239963511] [2022-11-20 09:28:12,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239963511] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:28:12,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767978566] [2022-11-20 09:28:12,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:12,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:28:12,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b848b7a-cbfa-4984-8280-60c3ff1c534f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:28:12,631 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b848b7a-cbfa-4984-8280-60c3ff1c534f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:28:12,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b848b7a-cbfa-4984-8280-60c3ff1c534f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 09:28:12,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:12,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-20 09:28:12,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:28:12,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:28:12,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:28:12,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:28:12,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 37 [2022-11-20 09:28:12,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:28:12,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:28:12,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:28:12,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 35 [2022-11-20 09:28:35,673 WARN L233 SmtUtils]: Spent 10.03s on a formula simplification that was a NOOP. DAG size: 28 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 09:28:35,942 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:35,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:28:36,521 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 09:28:36,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767978566] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:28:36,522 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:28:36,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 13, 8] total 24 [2022-11-20 09:28:36,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664345982] [2022-11-20 09:28:36,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:28:36,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-20 09:28:36,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:28:36,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-20 09:28:36,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=459, Unknown=6, NotChecked=0, Total=552 [2022-11-20 09:28:36,527 INFO L87 Difference]: Start difference. First operand 99 states and 126 transitions. Second operand has 24 states, 20 states have (on average 4.15) internal successors, (83), 23 states have internal predecessors, (83), 12 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (10), 8 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-20 09:28:36,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:28:36,945 INFO L93 Difference]: Finished difference Result 277 states and 356 transitions. [2022-11-20 09:28:36,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-20 09:28:36,946 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 20 states have (on average 4.15) internal successors, (83), 23 states have internal predecessors, (83), 12 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (10), 8 states have call predecessors, (10), 10 states have call successors, (10) Word has length 50 [2022-11-20 09:28:36,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:28:36,949 INFO L225 Difference]: With dead ends: 277 [2022-11-20 09:28:36,949 INFO L226 Difference]: Without dead ends: 158 [2022-11-20 09:28:36,951 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 91 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 22.8s TimeCoverageRelationStatistics Valid=101, Invalid=543, Unknown=6, NotChecked=0, Total=650 [2022-11-20 09:28:36,952 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 89 mSDsluCounter, 592 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 655 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 09:28:36,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 655 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 212 Invalid, 0 Unknown, 71 Unchecked, 0.3s Time] [2022-11-20 09:28:36,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-11-20 09:28:36,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 130. [2022-11-20 09:28:36,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 101 states have (on average 1.2178217821782178) internal successors, (123), 104 states have internal predecessors, (123), 16 states have call successors, (16), 10 states have call predecessors, (16), 12 states have return successors, (21), 15 states have call predecessors, (21), 15 states have call successors, (21) [2022-11-20 09:28:36,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 160 transitions. [2022-11-20 09:28:36,973 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 160 transitions. Word has length 50 [2022-11-20 09:28:36,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:28:36,974 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 160 transitions. [2022-11-20 09:28:36,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 20 states have (on average 4.15) internal successors, (83), 23 states have internal predecessors, (83), 12 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (10), 8 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-20 09:28:36,974 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 160 transitions. [2022-11-20 09:28:36,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-20 09:28:36,975 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:28:36,976 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-20 09:28:36,983 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b848b7a-cbfa-4984-8280-60c3ff1c534f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-20 09:28:37,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b848b7a-cbfa-4984-8280-60c3ff1c534f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:28:37,182 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:28:37,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:37,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1069445266, now seen corresponding path program 1 times [2022-11-20 09:28:37,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:37,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955353394] [2022-11-20 09:28:37,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:37,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:37,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:37,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-20 09:28:37,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:37,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-20 09:28:37,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:37,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-20 09:28:37,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:37,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-20 09:28:37,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:37,597 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 09:28:37,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:28:37,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955353394] [2022-11-20 09:28:37,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955353394] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:28:37,598 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:28:37,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 09:28:37,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787014001] [2022-11-20 09:28:37,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:28:37,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 09:28:37,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:28:37,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 09:28:37,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 09:28:37,600 INFO L87 Difference]: Start difference. First operand 130 states and 160 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-20 09:28:37,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:28:37,632 INFO L93 Difference]: Finished difference Result 214 states and 268 transitions. [2022-11-20 09:28:37,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 09:28:37,633 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 52 [2022-11-20 09:28:37,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:28:37,634 INFO L225 Difference]: With dead ends: 214 [2022-11-20 09:28:37,635 INFO L226 Difference]: Without dead ends: 123 [2022-11-20 09:28:37,635 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 09:28:37,636 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 0 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 09:28:37,636 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 261 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 09:28:37,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-11-20 09:28:37,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 122. [2022-11-20 09:28:37,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 95 states have (on average 1.1894736842105262) internal successors, (113), 98 states have internal predecessors, (113), 15 states have call successors, (15), 10 states have call predecessors, (15), 11 states have return successors, (17), 13 states have call predecessors, (17), 14 states have call successors, (17) [2022-11-20 09:28:37,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 145 transitions. [2022-11-20 09:28:37,657 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 145 transitions. Word has length 52 [2022-11-20 09:28:37,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:28:37,657 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 145 transitions. [2022-11-20 09:28:37,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-20 09:28:37,658 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 145 transitions. [2022-11-20 09:28:37,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-20 09:28:37,659 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:28:37,659 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:28:37,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-20 09:28:37,659 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:28:37,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:37,660 INFO L85 PathProgramCache]: Analyzing trace with hash -41969126, now seen corresponding path program 1 times [2022-11-20 09:28:37,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:37,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616519471] [2022-11-20 09:28:37,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:37,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:37,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:38,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-20 09:28:38,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:38,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-20 09:28:38,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:38,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-20 09:28:38,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:38,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-11-20 09:28:38,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:38,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-11-20 09:28:38,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:38,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 09:28:38,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:38,513 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 09:28:38,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:28:38,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616519471] [2022-11-20 09:28:38,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616519471] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:28:38,513 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:28:38,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-20 09:28:38,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563133281] [2022-11-20 09:28:38,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:28:38,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 09:28:38,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:28:38,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 09:28:38,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2022-11-20 09:28:38,516 INFO L87 Difference]: Start difference. First operand 122 states and 145 transitions. Second operand has 11 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 6 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-20 09:28:38,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:28:38,761 INFO L93 Difference]: Finished difference Result 128 states and 150 transitions. [2022-11-20 09:28:38,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 09:28:38,762 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 6 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 58 [2022-11-20 09:28:38,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:28:38,764 INFO L225 Difference]: With dead ends: 128 [2022-11-20 09:28:38,764 INFO L226 Difference]: Without dead ends: 124 [2022-11-20 09:28:38,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-11-20 09:28:38,765 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 16 mSDsluCounter, 431 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 09:28:38,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 492 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 09:28:38,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-11-20 09:28:38,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2022-11-20 09:28:38,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 97 states have (on average 1.175257731958763) internal successors, (114), 99 states have internal predecessors, (114), 15 states have call successors, (15), 11 states have call predecessors, (15), 11 states have return successors, (17), 13 states have call predecessors, (17), 14 states have call successors, (17) [2022-11-20 09:28:38,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 146 transitions. [2022-11-20 09:28:38,787 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 146 transitions. Word has length 58 [2022-11-20 09:28:38,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:28:38,787 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 146 transitions. [2022-11-20 09:28:38,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 6 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-20 09:28:38,788 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 146 transitions. [2022-11-20 09:28:38,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-20 09:28:38,789 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:28:38,789 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:28:38,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-20 09:28:38,789 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:28:38,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:38,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1239716043, now seen corresponding path program 1 times [2022-11-20 09:28:38,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:38,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445033020] [2022-11-20 09:28:38,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:38,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:38,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:39,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 09:28:39,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:39,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 09:28:39,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:39,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-20 09:28:39,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:40,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-20 09:28:40,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:40,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-11-20 09:28:40,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:40,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-20 09:28:40,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:40,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 09:28:40,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:40,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-20 09:28:40,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:40,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-11-20 09:28:40,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:40,314 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-20 09:28:40,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:28:40,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445033020] [2022-11-20 09:28:40,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445033020] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:28:40,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155975644] [2022-11-20 09:28:40,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:40,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:28:40,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b848b7a-cbfa-4984-8280-60c3ff1c534f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:28:40,316 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b848b7a-cbfa-4984-8280-60c3ff1c534f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:28:40,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b848b7a-cbfa-4984-8280-60c3ff1c534f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 09:28:40,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:40,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-20 09:28:40,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:28:41,692 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 09:28:41,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:28:42,367 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-11-20 09:28:42,367 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 25 [2022-11-20 09:28:42,376 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-11-20 09:28:42,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 12 [2022-11-20 09:28:42,496 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-11-20 09:28:42,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 25 [2022-11-20 09:28:42,509 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-11-20 09:28:42,509 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 12 [2022-11-20 09:28:42,547 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-20 09:28:42,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155975644] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:28:42,548 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:28:42,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 11] total 27 [2022-11-20 09:28:42,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106455199] [2022-11-20 09:28:42,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:28:42,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-20 09:28:42,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:28:42,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-20 09:28:42,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2022-11-20 09:28:42,551 INFO L87 Difference]: Start difference. First operand 124 states and 146 transitions. Second operand has 27 states, 24 states have (on average 4.625) internal successors, (111), 23 states have internal predecessors, (111), 11 states have call successors, (23), 5 states have call predecessors, (23), 9 states have return successors, (23), 10 states have call predecessors, (23), 10 states have call successors, (23) [2022-11-20 09:28:43,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:28:43,682 INFO L93 Difference]: Finished difference Result 153 states and 174 transitions. [2022-11-20 09:28:43,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 09:28:43,683 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 4.625) internal successors, (111), 23 states have internal predecessors, (111), 11 states have call successors, (23), 5 states have call predecessors, (23), 9 states have return successors, (23), 10 states have call predecessors, (23), 10 states have call successors, (23) Word has length 78 [2022-11-20 09:28:43,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:28:43,684 INFO L225 Difference]: With dead ends: 153 [2022-11-20 09:28:43,684 INFO L226 Difference]: Without dead ends: 146 [2022-11-20 09:28:43,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 153 SyntacticMatches, 8 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=199, Invalid=1061, Unknown=0, NotChecked=0, Total=1260 [2022-11-20 09:28:43,686 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 92 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 155 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 09:28:43,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 322 Invalid, 708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 526 Invalid, 0 Unknown, 155 Unchecked, 0.6s Time] [2022-11-20 09:28:43,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-11-20 09:28:43,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 138. [2022-11-20 09:28:43,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 108 states have (on average 1.1574074074074074) internal successors, (125), 111 states have internal predecessors, (125), 15 states have call successors, (15), 13 states have call predecessors, (15), 14 states have return successors, (17), 13 states have call predecessors, (17), 14 states have call successors, (17) [2022-11-20 09:28:43,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 157 transitions. [2022-11-20 09:28:43,706 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 157 transitions. Word has length 78 [2022-11-20 09:28:43,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:28:43,706 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 157 transitions. [2022-11-20 09:28:43,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 4.625) internal successors, (111), 23 states have internal predecessors, (111), 11 states have call successors, (23), 5 states have call predecessors, (23), 9 states have return successors, (23), 10 states have call predecessors, (23), 10 states have call successors, (23) [2022-11-20 09:28:43,707 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 157 transitions. [2022-11-20 09:28:43,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-20 09:28:43,708 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:28:43,708 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-20 09:28:43,734 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b848b7a-cbfa-4984-8280-60c3ff1c534f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 09:28:43,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b848b7a-cbfa-4984-8280-60c3ff1c534f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-20 09:28:43,928 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:28:43,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:43,929 INFO L85 PathProgramCache]: Analyzing trace with hash -2049062669, now seen corresponding path program 1 times [2022-11-20 09:28:43,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:43,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661028672] [2022-11-20 09:28:43,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:43,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:43,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:44,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 09:28:44,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:45,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 09:28:45,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:45,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-20 09:28:45,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:45,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-20 09:28:45,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:45,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-11-20 09:28:45,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:45,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-20 09:28:45,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:45,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 09:28:45,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:45,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-20 09:28:45,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:45,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-11-20 09:28:45,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:46,319 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 09:28:46,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:28:46,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661028672] [2022-11-20 09:28:46,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661028672] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:28:46,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97836970] [2022-11-20 09:28:46,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:46,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:28:46,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b848b7a-cbfa-4984-8280-60c3ff1c534f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:28:46,323 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b848b7a-cbfa-4984-8280-60c3ff1c534f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:28:46,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b848b7a-cbfa-4984-8280-60c3ff1c534f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 09:28:46,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:46,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-20 09:28:46,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:28:48,823 WARN L859 $PredicateComparison]: unable to prove that (or (exists ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_8| Int) (|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_7| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_8|) (+ |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_7| 24)) 0))) (exists ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_8| Int) (|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_7| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_8|) (+ |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_7| 24)) 0)))) is different from true [2022-11-20 09:28:51,126 WARN L859 $PredicateComparison]: unable to prove that (or (exists ((|v_aws_linked_list_init_#in~list.base_BEFORE_CALL_13| Int) (|v_aws_linked_list_init_#in~list.offset_BEFORE_CALL_13| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_init_#in~list.base_BEFORE_CALL_13|) (+ |v_aws_linked_list_init_#in~list.offset_BEFORE_CALL_13| 24)) 0))) (exists ((|v_aws_linked_list_init_#in~list.base_BEFORE_CALL_13| Int) (|v_aws_linked_list_init_#in~list.offset_BEFORE_CALL_13| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_init_#in~list.base_BEFORE_CALL_13|) (+ |v_aws_linked_list_init_#in~list.offset_BEFORE_CALL_13| 24)) 0)))) is different from true [2022-11-20 09:28:57,293 WARN L859 $PredicateComparison]: unable to prove that (or (exists ((|v_aws_linked_list_init_#in~list.base_BEFORE_CALL_14| Int) (|v_aws_linked_list_init_#in~list.offset_BEFORE_CALL_14| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_init_#in~list.base_BEFORE_CALL_14|) (+ |v_aws_linked_list_init_#in~list.offset_BEFORE_CALL_14| 24)) 0))) (exists ((|v_aws_linked_list_init_#in~list.base_BEFORE_CALL_14| Int) (|v_aws_linked_list_init_#in~list.offset_BEFORE_CALL_14| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_init_#in~list.base_BEFORE_CALL_14|) (+ |v_aws_linked_list_init_#in~list.offset_BEFORE_CALL_14| 24)) 0)))) is different from true [2022-11-20 09:28:59,471 WARN L859 $PredicateComparison]: unable to prove that (or (exists ((|v_aws_linked_list_init_#in~list.offset_BEFORE_CALL_15| Int) (|v_aws_linked_list_init_#in~list.base_BEFORE_CALL_15| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_init_#in~list.base_BEFORE_CALL_15|) (+ |v_aws_linked_list_init_#in~list.offset_BEFORE_CALL_15| 24)) 0))) (exists ((|v_aws_linked_list_init_#in~list.offset_BEFORE_CALL_15| Int) (|v_aws_linked_list_init_#in~list.base_BEFORE_CALL_15| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_init_#in~list.base_BEFORE_CALL_15|) (+ |v_aws_linked_list_init_#in~list.offset_BEFORE_CALL_15| 24)) 0)))) is different from true [2022-11-20 09:29:00,364 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 4 not checked. [2022-11-20 09:29:00,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:29:01,192 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-11-20 09:29:01,192 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 25 [2022-11-20 09:29:01,205 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-11-20 09:29:01,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 12 [2022-11-20 09:29:01,407 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-11-20 09:29:01,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 25 [2022-11-20 09:29:01,419 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-11-20 09:29:01,420 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 12 [2022-11-20 09:29:01,449 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-20 09:29:01,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97836970] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:29:01,450 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:29:01,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 13] total 42 [2022-11-20 09:29:01,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570899221] [2022-11-20 09:29:01,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:29:01,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-20 09:29:01,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:29:01,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-20 09:29:01,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1290, Unknown=4, NotChecked=300, Total=1722 [2022-11-20 09:29:01,453 INFO L87 Difference]: Start difference. First operand 138 states and 157 transitions. Second operand has 42 states, 38 states have (on average 3.1315789473684212) internal successors, (119), 37 states have internal predecessors, (119), 12 states have call successors, (24), 8 states have call predecessors, (24), 13 states have return successors, (23), 10 states have call predecessors, (23), 11 states have call successors, (23) [2022-11-20 09:29:20,625 WARN L233 SmtUtils]: Spent 6.02s on a formula simplification that was a NOOP. DAG size: 25 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 09:29:28,700 WARN L233 SmtUtils]: Spent 6.03s on a formula simplification that was a NOOP. DAG size: 35 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 09:29:36,776 WARN L233 SmtUtils]: Spent 6.03s on a formula simplification that was a NOOP. DAG size: 36 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 09:30:12,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:30:12,648 INFO L93 Difference]: Finished difference Result 178 states and 209 transitions. [2022-11-20 09:30:12,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-20 09:30:12,648 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 38 states have (on average 3.1315789473684212) internal successors, (119), 37 states have internal predecessors, (119), 12 states have call successors, (24), 8 states have call predecessors, (24), 13 states have return successors, (23), 10 states have call predecessors, (23), 11 states have call successors, (23) Word has length 78 [2022-11-20 09:30:12,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:30:12,654 INFO L225 Difference]: With dead ends: 178 [2022-11-20 09:30:12,654 INFO L226 Difference]: Without dead ends: 171 [2022-11-20 09:30:12,658 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 143 SyntacticMatches, 9 SemanticMatches, 64 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 840 ImplicationChecksByTransitivity, 83.9s TimeCoverageRelationStatistics Valid=365, Invalid=3419, Unknown=14, NotChecked=492, Total=4290 [2022-11-20 09:30:12,660 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 145 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 1080 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 430 SdHoareTripleChecker+Invalid, 2001 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1080 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 879 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-20 09:30:12,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 430 Invalid, 2001 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1080 Invalid, 0 Unknown, 879 Unchecked, 1.2s Time] [2022-11-20 09:30:12,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-11-20 09:30:12,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 139. [2022-11-20 09:30:12,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 109 states have (on average 1.1559633027522935) internal successors, (126), 112 states have internal predecessors, (126), 15 states have call successors, (15), 13 states have call predecessors, (15), 14 states have return successors, (17), 13 states have call predecessors, (17), 14 states have call successors, (17) [2022-11-20 09:30:12,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 158 transitions. [2022-11-20 09:30:12,692 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 158 transitions. Word has length 78 [2022-11-20 09:30:12,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:30:12,693 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 158 transitions. [2022-11-20 09:30:12,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 38 states have (on average 3.1315789473684212) internal successors, (119), 37 states have internal predecessors, (119), 12 states have call successors, (24), 8 states have call predecessors, (24), 13 states have return successors, (23), 10 states have call predecessors, (23), 11 states have call successors, (23) [2022-11-20 09:30:12,693 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 158 transitions. [2022-11-20 09:30:12,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-20 09:30:12,694 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:30:12,695 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-20 09:30:12,707 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b848b7a-cbfa-4984-8280-60c3ff1c534f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 09:30:12,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b848b7a-cbfa-4984-8280-60c3ff1c534f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:30:12,901 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:30:12,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:30:12,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1632743053, now seen corresponding path program 1 times [2022-11-20 09:30:12,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:30:12,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046902557] [2022-11-20 09:30:12,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:30:12,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:30:12,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:30:12,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 09:30:12,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:30:13,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 09:30:13,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:30:13,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-20 09:30:13,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:30:13,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-20 09:30:13,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:30:13,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-11-20 09:30:13,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:30:13,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-20 09:30:13,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:30:13,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 09:30:13,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:30:13,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-20 09:30:13,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:30:13,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-11-20 09:30:13,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:30:13,106 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-20 09:30:13,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:30:13,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046902557] [2022-11-20 09:30:13,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046902557] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:30:13,108 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:30:13,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 09:30:13,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916414500] [2022-11-20 09:30:13,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:30:13,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 09:30:13,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:30:13,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 09:30:13,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 09:30:13,112 INFO L87 Difference]: Start difference. First operand 139 states and 158 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2022-11-20 09:30:13,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:30:13,353 INFO L93 Difference]: Finished difference Result 172 states and 198 transitions. [2022-11-20 09:30:13,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 09:30:13,353 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) Word has length 78 [2022-11-20 09:30:13,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:30:13,356 INFO L225 Difference]: With dead ends: 172 [2022-11-20 09:30:13,356 INFO L226 Difference]: Without dead ends: 138 [2022-11-20 09:30:13,356 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-20 09:30:13,357 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 46 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 09:30:13,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 55 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 09:30:13,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-11-20 09:30:13,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 134. [2022-11-20 09:30:13,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 105 states have (on average 1.1333333333333333) internal successors, (119), 107 states have internal predecessors, (119), 14 states have call successors, (14), 13 states have call predecessors, (14), 14 states have return successors, (16), 13 states have call predecessors, (16), 13 states have call successors, (16) [2022-11-20 09:30:13,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 149 transitions. [2022-11-20 09:30:13,387 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 149 transitions. Word has length 78 [2022-11-20 09:30:13,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:30:13,388 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 149 transitions. [2022-11-20 09:30:13,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2022-11-20 09:30:13,388 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 149 transitions. [2022-11-20 09:30:13,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-20 09:30:13,389 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:30:13,389 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:30:13,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-20 09:30:13,390 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:30:13,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:30:13,391 INFO L85 PathProgramCache]: Analyzing trace with hash 1852877617, now seen corresponding path program 1 times [2022-11-20 09:30:13,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:30:13,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344780491] [2022-11-20 09:30:13,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:30:13,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:30:13,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:30:14,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 09:30:14,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:30:14,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 09:30:14,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:30:14,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-20 09:30:14,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:30:15,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-20 09:30:15,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:30:15,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-11-20 09:30:15,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:30:15,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-20 09:30:15,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:30:15,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 09:30:15,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:30:15,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-20 09:30:15,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:30:15,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-11-20 09:30:15,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:30:15,553 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-20 09:30:15,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:30:15,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344780491] [2022-11-20 09:30:15,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344780491] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:30:15,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373947222] [2022-11-20 09:30:15,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:30:15,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:30:15,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b848b7a-cbfa-4984-8280-60c3ff1c534f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:30:15,555 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b848b7a-cbfa-4984-8280-60c3ff1c534f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:30:15,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b848b7a-cbfa-4984-8280-60c3ff1c534f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 09:30:15,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:30:15,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-20 09:30:15,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:30:17,435 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 09:30:17,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:30:18,173 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-11-20 09:30:18,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 25 [2022-11-20 09:30:18,184 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-11-20 09:30:18,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 12 [2022-11-20 09:30:18,379 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-11-20 09:30:18,379 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 25 [2022-11-20 09:30:18,390 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-11-20 09:30:18,390 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 12 [2022-11-20 09:30:18,421 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-20 09:30:18,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373947222] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:30:18,421 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:30:18,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 13] total 37 [2022-11-20 09:30:18,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132427652] [2022-11-20 09:30:18,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:30:18,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-20 09:30:18,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:30:18,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-20 09:30:18,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1193, Unknown=0, NotChecked=0, Total=1332 [2022-11-20 09:30:18,426 INFO L87 Difference]: Start difference. First operand 134 states and 149 transitions. Second operand has 37 states, 33 states have (on average 3.4242424242424243) internal successors, (113), 33 states have internal predecessors, (113), 13 states have call successors, (24), 5 states have call predecessors, (24), 9 states have return successors, (23), 11 states have call predecessors, (23), 12 states have call successors, (23) [2022-11-20 09:30:20,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:30:20,134 INFO L93 Difference]: Finished difference Result 151 states and 165 transitions. [2022-11-20 09:30:20,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-20 09:30:20,135 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 33 states have (on average 3.4242424242424243) internal successors, (113), 33 states have internal predecessors, (113), 13 states have call successors, (24), 5 states have call predecessors, (24), 9 states have return successors, (23), 11 states have call predecessors, (23), 12 states have call successors, (23) Word has length 78 [2022-11-20 09:30:20,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:30:20,137 INFO L225 Difference]: With dead ends: 151 [2022-11-20 09:30:20,137 INFO L226 Difference]: Without dead ends: 141 [2022-11-20 09:30:20,139 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 146 SyntacticMatches, 8 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 858 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=360, Invalid=2720, Unknown=0, NotChecked=0, Total=3080 [2022-11-20 09:30:20,140 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 239 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 645 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 898 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 222 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 09:30:20,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 423 Invalid, 898 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 645 Invalid, 0 Unknown, 222 Unchecked, 0.7s Time] [2022-11-20 09:30:20,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-11-20 09:30:20,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 134. [2022-11-20 09:30:20,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 105 states have (on average 1.1238095238095238) internal successors, (118), 107 states have internal predecessors, (118), 14 states have call successors, (14), 13 states have call predecessors, (14), 14 states have return successors, (16), 13 states have call predecessors, (16), 13 states have call successors, (16) [2022-11-20 09:30:20,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 148 transitions. [2022-11-20 09:30:20,167 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 148 transitions. Word has length 78 [2022-11-20 09:30:20,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:30:20,167 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 148 transitions. [2022-11-20 09:30:20,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 33 states have (on average 3.4242424242424243) internal successors, (113), 33 states have internal predecessors, (113), 13 states have call successors, (24), 5 states have call predecessors, (24), 9 states have return successors, (23), 11 states have call predecessors, (23), 12 states have call successors, (23) [2022-11-20 09:30:20,168 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 148 transitions. [2022-11-20 09:30:20,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-20 09:30:20,169 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:30:20,169 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-20 09:30:20,181 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b848b7a-cbfa-4984-8280-60c3ff1c534f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-20 09:30:20,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b848b7a-cbfa-4984-8280-60c3ff1c534f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-20 09:30:20,380 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:30:20,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:30:20,380 INFO L85 PathProgramCache]: Analyzing trace with hash -981550605, now seen corresponding path program 1 times [2022-11-20 09:30:20,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:30:20,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211926228] [2022-11-20 09:30:20,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:30:20,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:30:20,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:30:20,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 09:30:20,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:30:20,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 09:30:20,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:30:20,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-20 09:30:20,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:30:20,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-20 09:30:20,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:30:20,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-11-20 09:30:20,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:30:20,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-20 09:30:20,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:30:20,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 09:30:20,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:30:20,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-20 09:30:20,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:30:20,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-11-20 09:30:20,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:30:20,595 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-20 09:30:20,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:30:20,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211926228] [2022-11-20 09:30:20,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211926228] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:30:20,596 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:30:20,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 09:30:20,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829211499] [2022-11-20 09:30:20,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:30:20,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 09:30:20,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:30:20,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 09:30:20,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 09:30:20,598 INFO L87 Difference]: Start difference. First operand 134 states and 148 transitions. Second operand has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2022-11-20 09:30:20,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:30:20,838 INFO L93 Difference]: Finished difference Result 144 states and 157 transitions. [2022-11-20 09:30:20,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 09:30:20,841 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) Word has length 78 [2022-11-20 09:30:20,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:30:20,842 INFO L225 Difference]: With dead ends: 144 [2022-11-20 09:30:20,842 INFO L226 Difference]: Without dead ends: 113 [2022-11-20 09:30:20,843 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-20 09:30:20,843 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 50 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 09:30:20,844 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 55 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 09:30:20,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-11-20 09:30:20,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2022-11-20 09:30:20,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 87 states have (on average 1.0804597701149425) internal successors, (94), 88 states have internal predecessors, (94), 13 states have call successors, (13), 12 states have call predecessors, (13), 12 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) [2022-11-20 09:30:20,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 121 transitions. [2022-11-20 09:30:20,864 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 121 transitions. Word has length 78 [2022-11-20 09:30:20,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:30:20,865 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 121 transitions. [2022-11-20 09:30:20,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2022-11-20 09:30:20,865 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 121 transitions. [2022-11-20 09:30:20,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-20 09:30:20,866 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:30:20,866 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:30:20,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-20 09:30:20,867 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:30:20,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:30:20,868 INFO L85 PathProgramCache]: Analyzing trace with hash 2111043055, now seen corresponding path program 1 times [2022-11-20 09:30:20,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:30:20,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779511473] [2022-11-20 09:30:20,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:30:20,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:30:20,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:30:21,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 09:30:21,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:30:21,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 09:30:21,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:30:21,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-20 09:30:21,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:30:21,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-20 09:30:21,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:30:21,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-11-20 09:30:21,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:30:21,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-20 09:30:21,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:30:21,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 09:30:21,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:30:21,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-20 09:30:21,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:30:21,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-11-20 09:30:21,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:30:21,696 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-20 09:30:21,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:30:21,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779511473] [2022-11-20 09:30:21,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779511473] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:30:21,697 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:30:21,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-20 09:30:21,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150779030] [2022-11-20 09:30:21,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:30:21,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 09:30:21,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:30:21,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 09:30:21,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2022-11-20 09:30:21,699 INFO L87 Difference]: Start difference. First operand 113 states and 121 transitions. Second operand has 12 states, 9 states have (on average 5.777777777777778) internal successors, (52), 10 states have internal predecessors, (52), 7 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 5 states have call predecessors, (9), 6 states have call successors, (9) [2022-11-20 09:30:22,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:30:22,204 INFO L93 Difference]: Finished difference Result 120 states and 127 transitions. [2022-11-20 09:30:22,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 09:30:22,204 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 5.777777777777778) internal successors, (52), 10 states have internal predecessors, (52), 7 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 5 states have call predecessors, (9), 6 states have call successors, (9) Word has length 78 [2022-11-20 09:30:22,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:30:22,205 INFO L225 Difference]: With dead ends: 120 [2022-11-20 09:30:22,206 INFO L226 Difference]: Without dead ends: 108 [2022-11-20 09:30:22,206 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2022-11-20 09:30:22,207 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 85 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 09:30:22,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 55 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 09:30:22,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-11-20 09:30:22,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2022-11-20 09:30:22,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 82 states have (on average 1.0731707317073171) internal successors, (88), 83 states have internal predecessors, (88), 13 states have call successors, (13), 12 states have call predecessors, (13), 12 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) [2022-11-20 09:30:22,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 115 transitions. [2022-11-20 09:30:22,226 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 115 transitions. Word has length 78 [2022-11-20 09:30:22,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:30:22,226 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 115 transitions. [2022-11-20 09:30:22,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 5.777777777777778) internal successors, (52), 10 states have internal predecessors, (52), 7 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 5 states have call predecessors, (9), 6 states have call successors, (9) [2022-11-20 09:30:22,227 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 115 transitions. [2022-11-20 09:30:22,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-11-20 09:30:22,232 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:30:22,232 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:30:22,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-20 09:30:22,233 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:30:22,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:30:22,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1310004315, now seen corresponding path program 1 times [2022-11-20 09:30:22,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:30:22,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541273185] [2022-11-20 09:30:22,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:30:22,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:30:22,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:30:23,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 09:30:23,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:30:24,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 09:30:24,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:30:24,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-20 09:30:24,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:30:24,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-20 09:30:24,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:30:25,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-11-20 09:30:25,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:30:25,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-20 09:30:25,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:30:25,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 09:30:25,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:30:25,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-20 09:30:25,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:30:25,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-11-20 09:30:25,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:30:25,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-20 09:30:25,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:30:25,875 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-20 09:30:25,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:30:25,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541273185] [2022-11-20 09:30:25,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541273185] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:30:25,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986924847] [2022-11-20 09:30:25,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:30:25,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:30:25,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b848b7a-cbfa-4984-8280-60c3ff1c534f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:30:25,877 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b848b7a-cbfa-4984-8280-60c3ff1c534f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:30:25,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b848b7a-cbfa-4984-8280-60c3ff1c534f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 09:30:26,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:30:26,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 119 conjunts are in the unsatisfiable core [2022-11-20 09:30:26,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:30:26,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:30:26,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:30:26,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:30:26,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 35 [2022-11-20 09:30:26,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:30:26,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:30:26,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:30:26,201 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 35 [2022-11-20 09:30:30,688 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 25 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:30:30,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:30:42,921 WARN L233 SmtUtils]: Spent 10.06s on a formula simplification that was a NOOP. DAG size: 26 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 09:30:53,139 WARN L233 SmtUtils]: Spent 10.06s on a formula simplification that was a NOOP. DAG size: 29 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 09:30:55,494 WARN L837 $PredicateComparison]: unable to prove that (or (and (forall ((|v_aws_linked_list_init_#in~list.base_BEFORE_CALL_39| Int) (|v_aws_linked_list_init_#in~list.offset_BEFORE_CALL_39| Int)) (= |v_aws_linked_list_init_#in~list.offset_BEFORE_CALL_39| (select (select |c_#memory_$Pointer$.offset| (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_init_#in~list.base_BEFORE_CALL_39|) |v_aws_linked_list_init_#in~list.offset_BEFORE_CALL_39|)) (+ (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_init_#in~list.base_BEFORE_CALL_39|) |v_aws_linked_list_init_#in~list.offset_BEFORE_CALL_39|) 8)))) (forall ((|v_aws_linked_list_init_#in~list.base_BEFORE_CALL_39| Int) (|v_aws_linked_list_init_#in~list.offset_BEFORE_CALL_39| Int)) (= |v_aws_linked_list_init_#in~list.base_BEFORE_CALL_39| (select (select |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_init_#in~list.base_BEFORE_CALL_39|) |v_aws_linked_list_init_#in~list.offset_BEFORE_CALL_39|)) (+ (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_init_#in~list.base_BEFORE_CALL_39|) |v_aws_linked_list_init_#in~list.offset_BEFORE_CALL_39|) 8))))) (and (= (select (select |c_#memory_$Pointer$.base| |c_aws_linked_list_is_valid_#in~list#1.base|) |c_aws_linked_list_is_valid_#in~list#1.offset|) |c_aws_linked_list_is_valid_#in~list#1.base|) (= (select (select |c_#memory_$Pointer$.offset| |c_aws_linked_list_is_valid_#in~list#1.base|) |c_aws_linked_list_is_valid_#in~list#1.offset|) (+ 16 |c_aws_linked_list_is_valid_#in~list#1.offset|))) (= (mod |c_aws_linked_list_is_valid_#res#1| 256) 0)) is different from false [2022-11-20 09:31:11,822 WARN L233 SmtUtils]: Spent 10.06s on a formula simplification that was a NOOP. DAG size: 36 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 09:31:13,859 WARN L837 $PredicateComparison]: unable to prove that (or (and (forall ((|v_aws_linked_list_init_#in~list.base_BEFORE_CALL_39| Int) (|v_aws_linked_list_init_#in~list.offset_BEFORE_CALL_39| Int)) (= |v_aws_linked_list_init_#in~list.offset_BEFORE_CALL_39| (select (select |c_#memory_$Pointer$.offset| (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_init_#in~list.base_BEFORE_CALL_39|) |v_aws_linked_list_init_#in~list.offset_BEFORE_CALL_39|)) (+ (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_init_#in~list.base_BEFORE_CALL_39|) |v_aws_linked_list_init_#in~list.offset_BEFORE_CALL_39|) 8)))) (forall ((|v_aws_linked_list_init_#in~list.base_BEFORE_CALL_39| Int) (|v_aws_linked_list_init_#in~list.offset_BEFORE_CALL_39| Int)) (= |v_aws_linked_list_init_#in~list.base_BEFORE_CALL_39| (select (select |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_init_#in~list.base_BEFORE_CALL_39|) |v_aws_linked_list_init_#in~list.offset_BEFORE_CALL_39|)) (+ (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_init_#in~list.base_BEFORE_CALL_39|) |v_aws_linked_list_init_#in~list.offset_BEFORE_CALL_39|) 8))))) (and (= (select (select |c_#memory_$Pointer$.base| |c_aws_linked_list_is_valid_#in~list#1.base|) |c_aws_linked_list_is_valid_#in~list#1.offset|) |c_aws_linked_list_is_valid_#in~list#1.base|) (= (select (select |c_#memory_$Pointer$.offset| |c_aws_linked_list_is_valid_#in~list#1.base|) |c_aws_linked_list_is_valid_#in~list#1.offset|) (+ 16 |c_aws_linked_list_is_valid_#in~list#1.offset|))) (= (mod |c_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~head_reaches_tail~0#1| 256) 0)) is different from false [2022-11-20 09:31:24,109 WARN L233 SmtUtils]: Spent 10.04s on a formula simplification that was a NOOP. DAG size: 40 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 09:31:34,435 WARN L233 SmtUtils]: Spent 10.07s on a formula simplification that was a NOOP. DAG size: 44 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 09:31:34,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986924847] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:31:34,504 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:31:34,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 29] total 45 [2022-11-20 09:31:34,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924522363] [2022-11-20 09:31:34,504 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:31:34,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-20 09:31:34,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:31:34,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-20 09:31:34,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=3067, Unknown=4, NotChecked=226, Total=3540 [2022-11-20 09:31:34,508 INFO L87 Difference]: Start difference. First operand 108 states and 115 transitions. Second operand has 45 states, 40 states have (on average 2.775) internal successors, (111), 37 states have internal predecessors, (111), 14 states have call successors, (19), 6 states have call predecessors, (19), 13 states have return successors, (19), 13 states have call predecessors, (19), 13 states have call successors, (19) [2022-11-20 09:31:46,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:31:46,524 INFO L93 Difference]: Finished difference Result 204 states and 223 transitions. [2022-11-20 09:31:46,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-11-20 09:31:46,525 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 40 states have (on average 2.775) internal successors, (111), 37 states have internal predecessors, (111), 14 states have call successors, (19), 6 states have call predecessors, (19), 13 states have return successors, (19), 13 states have call predecessors, (19), 13 states have call successors, (19) Word has length 91 [2022-11-20 09:31:46,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:31:46,527 INFO L225 Difference]: With dead ends: 204 [2022-11-20 09:31:46,527 INFO L226 Difference]: Without dead ends: 187 [2022-11-20 09:31:46,530 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 135 SyntacticMatches, 2 SemanticMatches, 93 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 2023 ImplicationChecksByTransitivity, 75.7s TimeCoverageRelationStatistics Valid=624, Invalid=7936, Unknown=4, NotChecked=366, Total=8930 [2022-11-20 09:31:46,531 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 145 mSDsluCounter, 921 mSDsCounter, 0 mSdLazyCounter, 1259 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 965 SdHoareTripleChecker+Invalid, 2508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1188 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-20 09:31:46,532 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 965 Invalid, 2508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1259 Invalid, 0 Unknown, 1188 Unchecked, 1.7s Time] [2022-11-20 09:31:46,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-11-20 09:31:46,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 170. [2022-11-20 09:31:46,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 129 states have (on average 1.062015503875969) internal successors, (137), 129 states have internal predecessors, (137), 20 states have call successors, (20), 18 states have call predecessors, (20), 20 states have return successors, (25), 22 states have call predecessors, (25), 19 states have call successors, (25) [2022-11-20 09:31:46,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 182 transitions. [2022-11-20 09:31:46,574 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 182 transitions. Word has length 91 [2022-11-20 09:31:46,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:31:46,575 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 182 transitions. [2022-11-20 09:31:46,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 40 states have (on average 2.775) internal successors, (111), 37 states have internal predecessors, (111), 14 states have call successors, (19), 6 states have call predecessors, (19), 13 states have return successors, (19), 13 states have call predecessors, (19), 13 states have call successors, (19) [2022-11-20 09:31:46,576 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 182 transitions. [2022-11-20 09:31:46,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-20 09:31:46,577 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:31:46,578 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-20 09:31:46,590 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b848b7a-cbfa-4984-8280-60c3ff1c534f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 09:31:46,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b848b7a-cbfa-4984-8280-60c3ff1c534f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-20 09:31:46,786 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:31:46,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:31:46,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1896059343, now seen corresponding path program 1 times [2022-11-20 09:31:46,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:31:46,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588672199] [2022-11-20 09:31:46,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:31:46,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:31:46,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:47,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 09:31:47,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:47,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 09:31:47,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:47,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-20 09:31:47,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:47,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-20 09:31:47,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:47,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-11-20 09:31:47,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:47,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-20 09:31:47,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:47,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 09:31:47,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:47,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-20 09:31:47,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:47,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-11-20 09:31:47,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:47,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-20 09:31:47,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:47,213 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-20 09:31:47,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:31:47,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588672199] [2022-11-20 09:31:47,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588672199] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:31:47,214 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:31:47,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-20 09:31:47,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85373965] [2022-11-20 09:31:47,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:31:47,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 09:31:47,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:31:47,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 09:31:47,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-20 09:31:47,217 INFO L87 Difference]: Start difference. First operand 170 states and 182 transitions. Second operand has 9 states, 8 states have (on average 5.75) internal successors, (46), 6 states have internal predecessors, (46), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2022-11-20 09:31:47,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:31:47,837 INFO L93 Difference]: Finished difference Result 178 states and 189 transitions. [2022-11-20 09:31:47,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:31:47,838 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.75) internal successors, (46), 6 states have internal predecessors, (46), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) Word has length 94 [2022-11-20 09:31:47,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:31:47,839 INFO L225 Difference]: With dead ends: 178 [2022-11-20 09:31:47,839 INFO L226 Difference]: Without dead ends: 169 [2022-11-20 09:31:47,840 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-11-20 09:31:47,841 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 47 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 09:31:47,841 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 106 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 09:31:47,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-11-20 09:31:47,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2022-11-20 09:31:47,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 128 states have (on average 1.0546875) internal successors, (135), 128 states have internal predecessors, (135), 20 states have call successors, (20), 18 states have call predecessors, (20), 20 states have return successors, (23), 22 states have call predecessors, (23), 19 states have call successors, (23) [2022-11-20 09:31:47,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 178 transitions. [2022-11-20 09:31:47,899 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 178 transitions. Word has length 94 [2022-11-20 09:31:47,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:31:47,900 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 178 transitions. [2022-11-20 09:31:47,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.75) internal successors, (46), 6 states have internal predecessors, (46), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2022-11-20 09:31:47,901 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 178 transitions. [2022-11-20 09:31:47,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-20 09:31:47,904 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:31:47,905 INFO L195 NwaCegarLoop]: trace histogram [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, 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] [2022-11-20 09:31:47,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-11-20 09:31:47,906 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:31:47,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:31:47,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1678043569, now seen corresponding path program 1 times [2022-11-20 09:31:47,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:31:47,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650444433] [2022-11-20 09:31:47,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:31:47,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:31:47,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:48,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 09:31:48,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:48,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 09:31:48,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:48,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-20 09:31:48,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:49,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-20 09:31:49,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:49,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-11-20 09:31:49,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:49,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-20 09:31:49,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:49,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 09:31:49,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:49,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-20 09:31:49,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:49,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-11-20 09:31:49,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:49,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-20 09:31:49,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:49,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-20 09:31:49,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:49,903 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-20 09:31:49,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:31:49,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650444433] [2022-11-20 09:31:49,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650444433] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:31:49,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464461899] [2022-11-20 09:31:49,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:31:49,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:31:49,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b848b7a-cbfa-4984-8280-60c3ff1c534f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:31:49,922 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b848b7a-cbfa-4984-8280-60c3ff1c534f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:31:49,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b848b7a-cbfa-4984-8280-60c3ff1c534f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 09:31:50,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:50,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 79 conjunts are in the unsatisfiable core [2022-11-20 09:31:50,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:32:14,890 WARN L233 SmtUtils]: Spent 10.03s on a formula simplification that was a NOOP. DAG size: 28 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 09:32:15,296 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 39 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 09:32:15,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:32:16,751 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-11-20 09:32:16,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-20 09:32:16,766 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-11-20 09:32:16,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 14 [2022-11-20 09:32:16,967 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 09:32:16,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 31 [2022-11-20 09:32:17,082 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 09:32:17,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 29 [2022-11-20 09:32:17,231 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-20 09:32:17,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464461899] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:32:17,231 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:32:17,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21, 16] total 45 [2022-11-20 09:32:17,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119140845] [2022-11-20 09:32:17,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:32:17,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-20 09:32:17,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:32:17,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-20 09:32:17,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1770, Unknown=6, NotChecked=0, Total=1980 [2022-11-20 09:32:17,240 INFO L87 Difference]: Start difference. First operand 169 states and 178 transitions. Second operand has 45 states, 40 states have (on average 3.7) internal successors, (148), 41 states have internal predecessors, (148), 21 states have call successors, (30), 6 states have call predecessors, (30), 13 states have return successors, (31), 20 states have call predecessors, (31), 20 states have call successors, (31) [2022-11-20 09:32:46,549 WARN L233 SmtUtils]: Spent 10.03s on a formula simplification that was a NOOP. DAG size: 34 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 09:32:46,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:32:46,874 INFO L93 Difference]: Finished difference Result 222 states and 237 transitions. [2022-11-20 09:32:46,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-20 09:32:46,875 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 40 states have (on average 3.7) internal successors, (148), 41 states have internal predecessors, (148), 21 states have call successors, (30), 6 states have call predecessors, (30), 13 states have return successors, (31), 20 states have call predecessors, (31), 20 states have call successors, (31) Word has length 102 [2022-11-20 09:32:46,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:32:46,876 INFO L225 Difference]: With dead ends: 222 [2022-11-20 09:32:46,876 INFO L226 Difference]: Without dead ends: 0 [2022-11-20 09:32:46,878 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 191 SyntacticMatches, 12 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1756 ImplicationChecksByTransitivity, 53.3s TimeCoverageRelationStatistics Valid=579, Invalid=4520, Unknown=13, NotChecked=0, Total=5112 [2022-11-20 09:32:46,879 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 240 mSDsluCounter, 505 mSDsCounter, 0 mSdLazyCounter, 1089 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 2017 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1089 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 852 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-20 09:32:46,879 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [242 Valid, 538 Invalid, 2017 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1089 Invalid, 0 Unknown, 852 Unchecked, 1.4s Time] [2022-11-20 09:32:46,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-20 09:32:46,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-20 09:32:46,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:46,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-20 09:32:46,881 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 102 [2022-11-20 09:32:46,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:32:46,881 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-20 09:32:46,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 40 states have (on average 3.7) internal successors, (148), 41 states have internal predecessors, (148), 21 states have call successors, (30), 6 states have call predecessors, (30), 13 states have return successors, (31), 20 states have call predecessors, (31), 20 states have call successors, (31) [2022-11-20 09:32:46,882 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-20 09:32:46,882 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-20 09:32:46,885 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-20 09:32:46,900 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b848b7a-cbfa-4984-8280-60c3ff1c534f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 09:32:47,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b848b7a-cbfa-4984-8280-60c3ff1c534f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:32:47,095 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.