./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/insertion_sort-2-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff 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_76900c6b-6c71-4380-adcd-35583862d80e/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76900c6b-6c71-4380-adcd-35583862d80e/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76900c6b-6c71-4380-adcd-35583862d80e/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76900c6b-6c71-4380-adcd-35583862d80e/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops/insertion_sort-2-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76900c6b-6c71-4380-adcd-35583862d80e/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76900c6b-6c71-4380-adcd-35583862d80e/bin/utaipan-verify-t7M7D8N6sZ --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f08b02f494e898be2e8c5098de245f701022f3f8b39ac6682b3bca3a03512826 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 04:19:18,538 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 04:19:18,631 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76900c6b-6c71-4380-adcd-35583862d80e/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-19 04:19:18,636 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 04:19:18,637 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 04:19:18,686 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 04:19:18,687 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 04:19:18,687 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 04:19:18,688 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 04:19:18,693 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 04:19:18,694 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 04:19:18,694 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 04:19:18,695 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 04:19:18,696 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 04:19:18,697 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 04:19:18,697 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 04:19:18,698 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 04:19:18,698 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 04:19:18,698 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 04:19:18,699 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 04:19:18,699 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 04:19:18,700 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 04:19:18,701 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 04:19:18,702 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 04:19:18,702 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 04:19:18,702 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 04:19:18,703 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 04:19:18,703 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 04:19:18,704 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 04:19:18,704 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 04:19:18,705 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 04:19:18,706 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 04:19:18,706 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 04:19:18,706 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 04:19:18,707 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 04:19:18,707 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 04:19:18,707 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:19:18,721 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 04:19:18,722 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 04:19:18,722 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 04:19:18,722 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 04:19:18,723 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 04:19:18,723 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 04:19:18,723 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 04:19:18,724 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 04:19:18,724 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_76900c6b-6c71-4380-adcd-35583862d80e/bin/utaipan-verify-t7M7D8N6sZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76900c6b-6c71-4380-adcd-35583862d80e/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f08b02f494e898be2e8c5098de245f701022f3f8b39ac6682b3bca3a03512826 [2023-11-19 04:19:19,065 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 04:19:19,095 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 04:19:19,098 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 04:19:19,099 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 04:19:19,100 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 04:19:19,104 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76900c6b-6c71-4380-adcd-35583862d80e/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/loops/insertion_sort-2-2.c [2023-11-19 04:19:22,233 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 04:19:22,448 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 04:19:22,448 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76900c6b-6c71-4380-adcd-35583862d80e/sv-benchmarks/c/loops/insertion_sort-2-2.c [2023-11-19 04:19:22,456 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76900c6b-6c71-4380-adcd-35583862d80e/bin/utaipan-verify-t7M7D8N6sZ/data/e660fd06e/1b59c397de8b4b418b32d337cb9cd1e0/FLAG1e8b5a8dd [2023-11-19 04:19:22,472 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76900c6b-6c71-4380-adcd-35583862d80e/bin/utaipan-verify-t7M7D8N6sZ/data/e660fd06e/1b59c397de8b4b418b32d337cb9cd1e0 [2023-11-19 04:19:22,478 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 04:19:22,479 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 04:19:22,516 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 04:19:22,517 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 04:19:22,522 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 04:19:22,523 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:19:22" (1/1) ... [2023-11-19 04:19:22,524 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e72b559 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:19:22, skipping insertion in model container [2023-11-19 04:19:22,524 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:19:22" (1/1) ... [2023-11-19 04:19:22,549 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 04:19:22,701 WARN L240 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_76900c6b-6c71-4380-adcd-35583862d80e/sv-benchmarks/c/loops/insertion_sort-2-2.c[330,343] [2023-11-19 04:19:22,721 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:19:22,730 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 04:19:22,745 WARN L240 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_76900c6b-6c71-4380-adcd-35583862d80e/sv-benchmarks/c/loops/insertion_sort-2-2.c[330,343] [2023-11-19 04:19:22,754 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:19:22,769 INFO L206 MainTranslator]: Completed translation [2023-11-19 04:19:22,770 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:19:22 WrapperNode [2023-11-19 04:19:22,770 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 04:19:22,771 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 04:19:22,772 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 04:19:22,772 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 04:19:22,779 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:19:22" (1/1) ... [2023-11-19 04:19:22,786 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:19:22" (1/1) ... [2023-11-19 04:19:22,808 INFO L138 Inliner]: procedures = 15, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 86 [2023-11-19 04:19:22,811 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 04:19:22,812 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 04:19:22,812 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 04:19:22,812 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 04:19:22,821 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:19:22" (1/1) ... [2023-11-19 04:19:22,821 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:19:22" (1/1) ... [2023-11-19 04:19:22,827 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:19:22" (1/1) ... [2023-11-19 04:19:22,827 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:19:22" (1/1) ... [2023-11-19 04:19:22,834 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:19:22" (1/1) ... [2023-11-19 04:19:22,851 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:19:22" (1/1) ... [2023-11-19 04:19:22,856 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:19:22" (1/1) ... [2023-11-19 04:19:22,857 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:19:22" (1/1) ... [2023-11-19 04:19:22,859 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 04:19:22,860 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 04:19:22,860 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 04:19:22,860 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 04:19:22,861 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:19:22" (1/1) ... [2023-11-19 04:19:22,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:19:22,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76900c6b-6c71-4380-adcd-35583862d80e/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:19:22,892 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76900c6b-6c71-4380-adcd-35583862d80e/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 04:19:22,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76900c6b-6c71-4380-adcd-35583862d80e/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 04:19:22,929 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 04:19:22,929 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 04:19:22,929 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 04:19:22,930 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 04:19:22,930 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 04:19:22,930 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 04:19:22,932 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 04:19:22,933 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 04:19:23,006 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 04:19:23,008 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 04:19:23,248 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 04:19:23,328 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 04:19:23,328 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-19 04:19:23,333 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:19:23 BoogieIcfgContainer [2023-11-19 04:19:23,333 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 04:19:23,335 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 04:19:23,335 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 04:19:23,339 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 04:19:23,339 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:19:22" (1/3) ... [2023-11-19 04:19:23,340 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12f52ba0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:19:23, skipping insertion in model container [2023-11-19 04:19:23,340 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:19:22" (2/3) ... [2023-11-19 04:19:23,340 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12f52ba0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:19:23, skipping insertion in model container [2023-11-19 04:19:23,340 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:19:23" (3/3) ... [2023-11-19 04:19:23,342 INFO L112 eAbstractionObserver]: Analyzing ICFG insertion_sort-2-2.c [2023-11-19 04:19:23,363 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 04:19:23,363 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 04:19:23,405 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 04:19:23,412 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=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@68a6c4c0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 04:19:23,412 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 04:19:23,416 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 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) [2023-11-19 04:19:23,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-19 04:19:23,420 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:19:23,421 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:19:23,422 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:19:23,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:19:23,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1045099531, now seen corresponding path program 1 times [2023-11-19 04:19:23,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:19:23,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005086678] [2023-11-19 04:19:23,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:19:23,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:19:23,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:19:23,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:19:23,955 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:19:23,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005086678] [2023-11-19 04:19:23,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005086678] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:19:23,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:19:23,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 04:19:23,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985328687] [2023-11-19 04:19:23,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:19:23,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:19:23,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:19:24,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:19:24,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:19:24,005 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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) [2023-11-19 04:19:24,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:19:24,106 INFO L93 Difference]: Finished difference Result 31 states and 45 transitions. [2023-11-19 04:19:24,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 04:19:24,109 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-19 04:19:24,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:19:24,118 INFO L225 Difference]: With dead ends: 31 [2023-11-19 04:19:24,119 INFO L226 Difference]: Without dead ends: 16 [2023-11-19 04:19:24,122 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:19:24,126 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 7 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:19:24,128 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 20 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:19:24,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2023-11-19 04:19:24,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 13. [2023-11-19 04:19:24,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 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) [2023-11-19 04:19:24,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2023-11-19 04:19:24,165 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 7 [2023-11-19 04:19:24,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:19:24,167 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2023-11-19 04:19:24,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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) [2023-11-19 04:19:24,168 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2023-11-19 04:19:24,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-19 04:19:24,169 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:19:24,169 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:19:24,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 04:19:24,170 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:19:24,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:19:24,171 INFO L85 PathProgramCache]: Analyzing trace with hash -265535434, now seen corresponding path program 1 times [2023-11-19 04:19:24,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:19:24,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305699336] [2023-11-19 04:19:24,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:19:24,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:19:24,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:19:24,513 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:19:24,513 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:19:24,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305699336] [2023-11-19 04:19:24,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305699336] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:19:24,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:19:24,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 04:19:24,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449275266] [2023-11-19 04:19:24,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:19:24,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:19:24,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:19:24,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:19:24,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:19:24,522 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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) [2023-11-19 04:19:24,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:19:24,583 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2023-11-19 04:19:24,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 04:19:24,584 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-11-19 04:19:24,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:19:24,586 INFO L225 Difference]: With dead ends: 24 [2023-11-19 04:19:24,586 INFO L226 Difference]: Without dead ends: 14 [2023-11-19 04:19:24,592 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:19:24,595 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 04:19:24,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 19 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 04:19:24,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2023-11-19 04:19:24,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2023-11-19 04:19:24,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 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) [2023-11-19 04:19:24,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2023-11-19 04:19:24,610 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 11 [2023-11-19 04:19:24,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:19:24,610 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2023-11-19 04:19:24,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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) [2023-11-19 04:19:24,613 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2023-11-19 04:19:24,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-19 04:19:24,615 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:19:24,615 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:19:24,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 04:19:24,616 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:19:24,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:19:24,617 INFO L85 PathProgramCache]: Analyzing trace with hash -198243322, now seen corresponding path program 1 times [2023-11-19 04:19:24,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:19:24,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586695827] [2023-11-19 04:19:24,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:19:24,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:19:24,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:19:24,909 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:19:24,910 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:19:24,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586695827] [2023-11-19 04:19:24,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586695827] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:19:24,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318309199] [2023-11-19 04:19:24,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:19:24,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:19:24,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76900c6b-6c71-4380-adcd-35583862d80e/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:19:24,915 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76900c6b-6c71-4380-adcd-35583862d80e/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:19:24,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76900c6b-6c71-4380-adcd-35583862d80e/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 04:19:25,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:19:25,041 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 04:19:25,047 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:19:25,123 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:19:25,123 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:19:25,203 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:19:25,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318309199] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:19:25,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1504748776] [2023-11-19 04:19:25,237 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-11-19 04:19:25,238 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:19:25,245 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:19:25,253 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:19:25,254 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:19:26,751 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 04:19:27,202 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '215#(and (= |ULTIMATE.start_main_~k~0#1| 1) (= |ULTIMATE.start_main_~#v~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~j~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= (mod |ULTIMATE.start_main_~SIZE~0#1| 4294967296) (mod |ULTIMATE.start_main_~j~0#1| 4294967296)) (= (select (select |#memory_int| |ULTIMATE.start_main_~#v~0#1.base|) 0) |ULTIMATE.start_main_#t~mem13#1|) (<= 2 (mod |ULTIMATE.start_main_~SIZE~0#1| 4294967296)) (= (select (select |#memory_int| |ULTIMATE.start_main_~#v~0#1.base|) 4) |ULTIMATE.start_main_#t~mem14#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= (+ |ULTIMATE.start_main_#t~mem14#1| 1) |ULTIMATE.start_main_#t~mem13#1|))' at error location [2023-11-19 04:19:27,202 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 04:19:27,203 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 04:19:27,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-11-19 04:19:27,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213168899] [2023-11-19 04:19:27,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 04:19:27,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-19 04:19:27,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:19:27,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-19 04:19:27,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2023-11-19 04:19:27,206 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 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) [2023-11-19 04:19:27,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:19:27,273 INFO L93 Difference]: Finished difference Result 28 states and 35 transitions. [2023-11-19 04:19:27,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 04:19:27,274 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-11-19 04:19:27,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:19:27,275 INFO L225 Difference]: With dead ends: 28 [2023-11-19 04:19:27,275 INFO L226 Difference]: Without dead ends: 18 [2023-11-19 04:19:27,275 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2023-11-19 04:19:27,277 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 9 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:19:27,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 30 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:19:27,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-11-19 04:19:27,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 15. [2023-11-19 04:19:27,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 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) [2023-11-19 04:19:27,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2023-11-19 04:19:27,282 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 12 [2023-11-19 04:19:27,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:19:27,282 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2023-11-19 04:19:27,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 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) [2023-11-19 04:19:27,283 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2023-11-19 04:19:27,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-19 04:19:27,283 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:19:27,283 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:19:27,310 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76900c6b-6c71-4380-adcd-35583862d80e/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 04:19:27,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76900c6b-6c71-4380-adcd-35583862d80e/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:19:27,505 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:19:27,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:19:27,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1887812150, now seen corresponding path program 2 times [2023-11-19 04:19:27,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:19:27,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981702584] [2023-11-19 04:19:27,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:19:27,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:19:27,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:19:28,305 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:19:28,305 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:19:28,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981702584] [2023-11-19 04:19:28,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981702584] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:19:28,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251119756] [2023-11-19 04:19:28,306 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 04:19:28,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:19:28,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76900c6b-6c71-4380-adcd-35583862d80e/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:19:28,313 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76900c6b-6c71-4380-adcd-35583862d80e/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:19:28,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76900c6b-6c71-4380-adcd-35583862d80e/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 04:19:28,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-19 04:19:28,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 04:19:28,385 INFO L262 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-19 04:19:28,388 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:19:28,492 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2023-11-19 04:19:28,546 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 04:19:28,547 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2023-11-19 04:19:28,563 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 04:19:28,564 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:19:28,699 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 51 [2023-11-19 04:19:28,728 INFO L349 Elim1Store]: treesize reduction 5, result has 70.6 percent of original size [2023-11-19 04:19:28,728 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 87 treesize of output 80 [2023-11-19 04:19:28,814 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 04:19:28,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251119756] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:19:28,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1750036423] [2023-11-19 04:19:28,817 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-11-19 04:19:28,818 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:19:28,818 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:19:28,818 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:19:28,818 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:19:29,544 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 04:19:30,094 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '377#(and (= |ULTIMATE.start_main_~k~0#1| 1) (= |ULTIMATE.start_main_~#v~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~j~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= (mod |ULTIMATE.start_main_~SIZE~0#1| 4294967296) (mod |ULTIMATE.start_main_~j~0#1| 4294967296)) (= (select (select |#memory_int| |ULTIMATE.start_main_~#v~0#1.base|) 0) |ULTIMATE.start_main_#t~mem13#1|) (<= 2 (mod |ULTIMATE.start_main_~SIZE~0#1| 4294967296)) (= (select (select |#memory_int| |ULTIMATE.start_main_~#v~0#1.base|) 4) |ULTIMATE.start_main_#t~mem14#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= (+ |ULTIMATE.start_main_#t~mem14#1| 1) |ULTIMATE.start_main_#t~mem13#1|))' at error location [2023-11-19 04:19:30,094 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 04:19:30,094 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 04:19:30,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 9] total 19 [2023-11-19 04:19:30,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578671299] [2023-11-19 04:19:30,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 04:19:30,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-19 04:19:30,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:19:30,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-19 04:19:30,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=655, Unknown=0, NotChecked=0, Total=756 [2023-11-19 04:19:30,097 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 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) [2023-11-19 04:19:30,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:19:30,625 INFO L93 Difference]: Finished difference Result 47 states and 57 transitions. [2023-11-19 04:19:30,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-19 04:19:30,625 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-11-19 04:19:30,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:19:30,626 INFO L225 Difference]: With dead ends: 47 [2023-11-19 04:19:30,627 INFO L226 Difference]: Without dead ends: 45 [2023-11-19 04:19:30,628 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=262, Invalid=1378, Unknown=0, NotChecked=0, Total=1640 [2023-11-19 04:19:30,629 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 120 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 04:19:30,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 49 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 04:19:30,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-11-19 04:19:30,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 23. [2023-11-19 04:19:30,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 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) [2023-11-19 04:19:30,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2023-11-19 04:19:30,636 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 13 [2023-11-19 04:19:30,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:19:30,637 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2023-11-19 04:19:30,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 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) [2023-11-19 04:19:30,637 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2023-11-19 04:19:30,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-19 04:19:30,638 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:19:30,638 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:19:30,663 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76900c6b-6c71-4380-adcd-35583862d80e/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 04:19:30,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76900c6b-6c71-4380-adcd-35583862d80e/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:19:30,853 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:19:30,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:19:30,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1515173535, now seen corresponding path program 1 times [2023-11-19 04:19:30,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:19:30,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145117264] [2023-11-19 04:19:30,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:19:30,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:19:30,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:19:31,107 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 04:19:31,108 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:19:31,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145117264] [2023-11-19 04:19:31,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145117264] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:19:31,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876895015] [2023-11-19 04:19:31,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:19:31,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:19:31,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76900c6b-6c71-4380-adcd-35583862d80e/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:19:31,109 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76900c6b-6c71-4380-adcd-35583862d80e/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:19:31,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76900c6b-6c71-4380-adcd-35583862d80e/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 04:19:31,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:19:31,181 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-19 04:19:31,182 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:19:31,250 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 04:19:31,251 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:19:31,532 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 04:19:31,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876895015] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:19:31,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [275245806] [2023-11-19 04:19:31,535 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-11-19 04:19:31,535 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:19:31,536 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:19:31,536 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:19:31,536 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:19:32,294 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 04:19:32,808 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '613#(and (= |ULTIMATE.start_main_~#v~0#1.offset| 0) (<= (+ (mod |ULTIMATE.start_main_~k~0#1| 4294967296) 1) (mod |ULTIMATE.start_main_~SIZE~0#1| 4294967296)) (<= 1 |ULTIMATE.start_main_~j~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_#t~mem13#1| (select (select |#memory_int| |ULTIMATE.start_main_~#v~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (- 4)))) (= (select (select |#memory_int| |ULTIMATE.start_main_~#v~0#1.base|) (* |ULTIMATE.start_main_~k~0#1| 4)) |ULTIMATE.start_main_#t~mem14#1|) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= (+ |ULTIMATE.start_main_#t~mem14#1| 1) |ULTIMATE.start_main_#t~mem13#1|))' at error location [2023-11-19 04:19:32,808 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 04:19:32,808 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 04:19:32,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2023-11-19 04:19:32,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621593891] [2023-11-19 04:19:32,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 04:19:32,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-19 04:19:32,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:19:32,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-19 04:19:32,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2023-11-19 04:19:32,811 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 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) [2023-11-19 04:19:33,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:19:33,001 INFO L93 Difference]: Finished difference Result 72 states and 94 transitions. [2023-11-19 04:19:33,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 04:19:33,002 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-11-19 04:19:33,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:19:33,003 INFO L225 Difference]: With dead ends: 72 [2023-11-19 04:19:33,003 INFO L226 Difference]: Without dead ends: 51 [2023-11-19 04:19:33,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2023-11-19 04:19:33,005 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 33 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:19:33,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 64 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:19:33,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-11-19 04:19:33,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 43. [2023-11-19 04:19:33,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.2857142857142858) internal successors, (54), 42 states have internal predecessors, (54), 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) [2023-11-19 04:19:33,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 54 transitions. [2023-11-19 04:19:33,018 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 54 transitions. Word has length 16 [2023-11-19 04:19:33,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:19:33,018 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 54 transitions. [2023-11-19 04:19:33,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 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) [2023-11-19 04:19:33,019 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 54 transitions. [2023-11-19 04:19:33,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-19 04:19:33,020 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:19:33,020 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:19:33,040 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76900c6b-6c71-4380-adcd-35583862d80e/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 04:19:33,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76900c6b-6c71-4380-adcd-35583862d80e/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:19:33,236 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:19:33,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:19:33,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1444031468, now seen corresponding path program 1 times [2023-11-19 04:19:33,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:19:33,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579228390] [2023-11-19 04:19:33,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:19:33,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:19:33,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:19:33,444 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 04:19:33,444 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:19:33,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579228390] [2023-11-19 04:19:33,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579228390] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:19:33,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838083746] [2023-11-19 04:19:33,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:19:33,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:19:33,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76900c6b-6c71-4380-adcd-35583862d80e/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:19:33,447 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76900c6b-6c71-4380-adcd-35583862d80e/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:19:33,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76900c6b-6c71-4380-adcd-35583862d80e/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 04:19:33,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:19:33,549 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 04:19:33,553 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:19:33,591 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 04:19:33,591 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:19:33,630 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 04:19:33,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838083746] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:19:33,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1794623964] [2023-11-19 04:19:33,636 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-11-19 04:19:33,636 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:19:33,636 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:19:33,637 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:19:33,637 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:19:34,369 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 04:19:34,565 WARN L876 $PredicateComparison]: unable to prove that (or (exists ((|v_#memory_int_63| (Array Int (Array Int Int))) (|v_ULTIMATE.start_main_#t~short10#1_16| Bool) (|v_ULTIMATE.start_main_#t~mem9#1_61| Int) (|v_ULTIMATE.start_main_#t~mem9#1_62| Int)) (let ((.cse0 (not |v_ULTIMATE.start_main_#t~short10#1_16|)) (.cse1 (select |v_#memory_int_63| |c_ULTIMATE.start_main_~#v~0#1.base|)) (.cse2 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (and (or (and .cse0 (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) 0)) (and |v_ULTIMATE.start_main_#t~short10#1_16| (<= 0 |c_ULTIMATE.start_main_~i~0#1|))) (or (and (= |v_ULTIMATE.start_main_#t~mem9#1_62| |v_ULTIMATE.start_main_#t~mem9#1_61|) .cse0) (and (= |v_ULTIMATE.start_main_#t~mem9#1_62| (select .cse1 (+ .cse2 |c_ULTIMATE.start_main_~#v~0#1.offset|))) |v_ULTIMATE.start_main_#t~short10#1_16| (<= |v_ULTIMATE.start_main_#t~mem9#1_62| |c_ULTIMATE.start_main_~key~0#1|))) (= (store |v_#memory_int_63| |c_ULTIMATE.start_main_~#v~0#1.base| (store .cse1 (+ .cse2 |c_ULTIMATE.start_main_~#v~0#1.offset| 4) |c_ULTIMATE.start_main_~key~0#1|)) |c_#memory_int|)))) (and (exists ((|v_ULTIMATE.start_main_~j~0#1_76| Int)) (and (<= (mod |c_ULTIMATE.start_main_~SIZE~0#1| 4294967296) (mod |v_ULTIMATE.start_main_~j~0#1_76| 4294967296)) (let ((.cse3 (<= 1 |c_#StackHeapBarrier|)) (.cse4 (<= 2 |c_ULTIMATE.start_main_~#v~0#1.base|))) (or (and .cse3 (<= 0 |v_ULTIMATE.start_main_~j~0#1_76|) .cse4) (and (<= 1 |v_ULTIMATE.start_main_~j~0#1_76|) .cse3 .cse4))))) (= |c_ULTIMATE.start_main_~j~0#1| 1) (= |c_ULTIMATE.start_main_~#v~0#1.offset| 0))) is different from true [2023-11-19 04:19:35,038 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '905#(and (= |ULTIMATE.start_main_~k~0#1| 1) (exists ((|v_#memory_int_63| (Array Int (Array Int Int))) (|v_ULTIMATE.start_main_#t~short10#1_16| Bool) (|v_ULTIMATE.start_main_#t~mem9#1_61| Int) (|v_ULTIMATE.start_main_#t~mem9#1_62| Int)) (and (= |#memory_int| (store |v_#memory_int_63| |ULTIMATE.start_main_~#v~0#1.base| (store (select |v_#memory_int_63| |ULTIMATE.start_main_~#v~0#1.base|) (+ (* |ULTIMATE.start_main_~i~0#1| 4) |ULTIMATE.start_main_~#v~0#1.offset| 4) |ULTIMATE.start_main_~key~0#1|))) (or (and |v_ULTIMATE.start_main_#t~short10#1_16| (= (select (select |v_#memory_int_63| |ULTIMATE.start_main_~#v~0#1.base|) (+ (* |ULTIMATE.start_main_~i~0#1| 4) |ULTIMATE.start_main_~#v~0#1.offset|)) |v_ULTIMATE.start_main_#t~mem9#1_62|) (<= |v_ULTIMATE.start_main_#t~mem9#1_62| |ULTIMATE.start_main_~key~0#1|)) (and (= |v_ULTIMATE.start_main_#t~mem9#1_62| |v_ULTIMATE.start_main_#t~mem9#1_61|) (not |v_ULTIMATE.start_main_#t~short10#1_16|))) (or (and (<= (+ |ULTIMATE.start_main_~i~0#1| 1) 0) (not |v_ULTIMATE.start_main_#t~short10#1_16|)) (and |v_ULTIMATE.start_main_#t~short10#1_16| (<= 0 |ULTIMATE.start_main_~i~0#1|))))) (= (select (select |#memory_int| |ULTIMATE.start_main_~#v~0#1.base|) |ULTIMATE.start_main_~#v~0#1.offset|) |ULTIMATE.start_main_#t~mem13#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= (mod |ULTIMATE.start_main_~SIZE~0#1| 4294967296) (mod |ULTIMATE.start_main_~j~0#1| 4294967296)) (<= 2 (mod |ULTIMATE.start_main_~SIZE~0#1| 4294967296)) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#v~0#1.base|) (+ |ULTIMATE.start_main_~#v~0#1.offset| 4)) |ULTIMATE.start_main_#t~mem14#1|) (<= (+ |ULTIMATE.start_main_#t~mem14#1| 1) |ULTIMATE.start_main_#t~mem13#1|))' at error location [2023-11-19 04:19:35,039 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 04:19:35,039 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 04:19:35,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2023-11-19 04:19:35,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582696613] [2023-11-19 04:19:35,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 04:19:35,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 04:19:35,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:19:35,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 04:19:35,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=171, Unknown=6, NotChecked=26, Total=240 [2023-11-19 04:19:35,042 INFO L87 Difference]: Start difference. First operand 43 states and 54 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 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) [2023-11-19 04:19:35,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:19:35,172 INFO L93 Difference]: Finished difference Result 54 states and 67 transitions. [2023-11-19 04:19:35,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 04:19:35,173 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-11-19 04:19:35,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:19:35,174 INFO L225 Difference]: With dead ends: 54 [2023-11-19 04:19:35,174 INFO L226 Difference]: Without dead ends: 30 [2023-11-19 04:19:35,175 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=60, Invalid=244, Unknown=6, NotChecked=32, Total=342 [2023-11-19 04:19:35,176 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 21 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:19:35,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 27 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:19:35,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-11-19 04:19:35,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2023-11-19 04:19:35,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 27 states have internal predecessors, (34), 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) [2023-11-19 04:19:35,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2023-11-19 04:19:35,186 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 17 [2023-11-19 04:19:35,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:19:35,187 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2023-11-19 04:19:35,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 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) [2023-11-19 04:19:35,187 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2023-11-19 04:19:35,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-19 04:19:35,188 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:19:35,189 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:19:35,216 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76900c6b-6c71-4380-adcd-35583862d80e/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 04:19:35,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76900c6b-6c71-4380-adcd-35583862d80e/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-19 04:19:35,406 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:19:35,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:19:35,406 INFO L85 PathProgramCache]: Analyzing trace with hash -913146176, now seen corresponding path program 2 times [2023-11-19 04:19:35,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:19:35,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387146881] [2023-11-19 04:19:35,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:19:35,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:19:35,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:19:36,506 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 04:19:36,506 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:19:36,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387146881] [2023-11-19 04:19:36,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387146881] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:19:36,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019766437] [2023-11-19 04:19:36,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 04:19:36,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:19:36,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76900c6b-6c71-4380-adcd-35583862d80e/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:19:36,508 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76900c6b-6c71-4380-adcd-35583862d80e/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:19:36,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76900c6b-6c71-4380-adcd-35583862d80e/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 04:19:36,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-19 04:19:36,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 04:19:36,596 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-19 04:19:36,599 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:19:36,673 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-19 04:19:36,691 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 15 [2023-11-19 04:19:36,820 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 04:19:36,821 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 25 [2023-11-19 04:19:36,857 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 04:19:36,857 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2023-11-19 04:19:36,873 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 04:19:36,873 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:19:37,393 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 250 treesize of output 230 [2023-11-19 04:19:37,557 INFO L349 Elim1Store]: treesize reduction 13, result has 80.6 percent of original size [2023-11-19 04:19:37,559 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 45303 treesize of output 38911 [2023-11-19 04:19:40,036 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 04:19:40,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019766437] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:19:40,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1443156751] [2023-11-19 04:19:40,039 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-11-19 04:19:40,039 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:19:40,040 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:19:40,040 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:19:40,040 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:19:40,524 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 04:19:40,781 WARN L876 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_main_#t~mem9#1_81| Int) (|v_ULTIMATE.start_main_#t~mem9#1_80| Int) (|v_#memory_int_79| (Array Int (Array Int Int))) (|v_ULTIMATE.start_main_#t~short10#1_16| Bool)) (let ((.cse0 (not |v_ULTIMATE.start_main_#t~short10#1_16|)) (.cse1 (select |v_#memory_int_79| |c_ULTIMATE.start_main_~#v~0#1.base|)) (.cse2 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (and (or (and .cse0 (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) 0)) (and |v_ULTIMATE.start_main_#t~short10#1_16| (<= 0 |c_ULTIMATE.start_main_~i~0#1|))) (= (store |v_#memory_int_79| |c_ULTIMATE.start_main_~#v~0#1.base| (store .cse1 (+ .cse2 |c_ULTIMATE.start_main_~#v~0#1.offset| 4) |c_ULTIMATE.start_main_~key~0#1|)) |c_#memory_int|) (or (and (= |v_ULTIMATE.start_main_#t~mem9#1_81| |v_ULTIMATE.start_main_#t~mem9#1_80|) .cse0) (and |v_ULTIMATE.start_main_#t~short10#1_16| (<= |v_ULTIMATE.start_main_#t~mem9#1_81| |c_ULTIMATE.start_main_~key~0#1|) (= (select .cse1 (+ .cse2 |c_ULTIMATE.start_main_~#v~0#1.offset|)) |v_ULTIMATE.start_main_#t~mem9#1_81|)))))) (and (= |c_ULTIMATE.start_main_~j~0#1| 1) (exists ((|v_ULTIMATE.start_main_~j~0#1_89| Int)) (and (let ((.cse3 (<= 1 |c_#StackHeapBarrier|)) (.cse4 (<= 2 |c_ULTIMATE.start_main_~#v~0#1.base|))) (or (and .cse3 .cse4 (<= 0 |v_ULTIMATE.start_main_~j~0#1_89|)) (and .cse3 (<= 1 |v_ULTIMATE.start_main_~j~0#1_89|) .cse4))) (<= (mod |c_ULTIMATE.start_main_~SIZE~0#1| 4294967296) (mod |v_ULTIMATE.start_main_~j~0#1_89| 4294967296)))) (= |c_ULTIMATE.start_main_~#v~0#1.offset| 0))) is different from true [2023-11-19 04:19:41,286 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1182#(and (= |ULTIMATE.start_main_~k~0#1| 1) (= (select (select |#memory_int| |ULTIMATE.start_main_~#v~0#1.base|) |ULTIMATE.start_main_~#v~0#1.offset|) |ULTIMATE.start_main_#t~mem13#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= (mod |ULTIMATE.start_main_~SIZE~0#1| 4294967296) (mod |ULTIMATE.start_main_~j~0#1| 4294967296)) (<= 2 (mod |ULTIMATE.start_main_~SIZE~0#1| 4294967296)) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#v~0#1.base|) (+ |ULTIMATE.start_main_~#v~0#1.offset| 4)) |ULTIMATE.start_main_#t~mem14#1|) (exists ((|v_ULTIMATE.start_main_#t~mem9#1_81| Int) (|v_ULTIMATE.start_main_#t~mem9#1_80| Int) (|v_#memory_int_79| (Array Int (Array Int Int))) (|v_ULTIMATE.start_main_#t~short10#1_16| Bool)) (and (or (and (= |v_ULTIMATE.start_main_#t~mem9#1_81| |v_ULTIMATE.start_main_#t~mem9#1_80|) (not |v_ULTIMATE.start_main_#t~short10#1_16|)) (and |v_ULTIMATE.start_main_#t~short10#1_16| (<= |v_ULTIMATE.start_main_#t~mem9#1_81| |ULTIMATE.start_main_~key~0#1|) (= |v_ULTIMATE.start_main_#t~mem9#1_81| (select (select |v_#memory_int_79| |ULTIMATE.start_main_~#v~0#1.base|) (+ (* |ULTIMATE.start_main_~i~0#1| 4) |ULTIMATE.start_main_~#v~0#1.offset|))))) (= |#memory_int| (store |v_#memory_int_79| |ULTIMATE.start_main_~#v~0#1.base| (store (select |v_#memory_int_79| |ULTIMATE.start_main_~#v~0#1.base|) (+ (* |ULTIMATE.start_main_~i~0#1| 4) |ULTIMATE.start_main_~#v~0#1.offset| 4) |ULTIMATE.start_main_~key~0#1|))) (or (and (<= (+ |ULTIMATE.start_main_~i~0#1| 1) 0) (not |v_ULTIMATE.start_main_#t~short10#1_16|)) (and |v_ULTIMATE.start_main_#t~short10#1_16| (<= 0 |ULTIMATE.start_main_~i~0#1|))))) (<= (+ |ULTIMATE.start_main_#t~mem14#1| 1) |ULTIMATE.start_main_#t~mem13#1|))' at error location [2023-11-19 04:19:41,286 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 04:19:41,286 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 04:19:41,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 12] total 27 [2023-11-19 04:19:41,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022700406] [2023-11-19 04:19:41,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 04:19:41,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-19 04:19:41,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:19:41,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-19 04:19:41,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=992, Unknown=10, NotChecked=64, Total=1190 [2023-11-19 04:19:41,289 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 27 states have internal predecessors, (46), 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) [2023-11-19 04:19:47,935 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-19 04:19:49,966 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-19 04:19:51,979 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-19 04:19:53,989 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-19 04:19:55,987 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-19 04:19:58,203 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-19 04:20:04,915 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-19 04:20:07,242 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-19 04:20:09,255 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-19 04:20:11,371 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1]