./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-benchs/divmul_diverge.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fd260c0-b7f5-481a-bfe4-13d56e89a8ed/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fd260c0-b7f5-481a-bfe4-13d56e89a8ed/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fd260c0-b7f5-481a-bfe4-13d56e89a8ed/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fd260c0-b7f5-481a-bfe4-13d56e89a8ed/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/divmul_diverge.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fd260c0-b7f5-481a-bfe4-13d56e89a8ed/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fd260c0-b7f5-481a-bfe4-13d56e89a8ed/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6ffdc119181aa2456330d740041ecbf5eb23a58830499150b547bc21d0f8f549 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 16:03:17,693 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 16:03:17,695 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 16:03:17,713 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 16:03:17,714 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 16:03:17,715 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 16:03:17,716 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 16:03:17,718 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 16:03:17,719 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 16:03:17,720 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 16:03:17,721 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 16:03:17,722 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 16:03:17,722 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 16:03:17,723 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 16:03:17,724 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 16:03:17,725 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 16:03:17,726 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 16:03:17,727 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 16:03:17,729 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 16:03:17,730 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 16:03:17,732 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 16:03:17,733 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 16:03:17,734 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 16:03:17,734 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 16:03:17,736 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 16:03:17,737 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 16:03:17,737 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 16:03:17,738 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 16:03:17,738 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 16:03:17,738 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 16:03:17,739 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 16:03:17,739 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 16:03:17,740 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 16:03:17,740 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 16:03:17,741 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 16:03:17,741 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 16:03:17,741 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 16:03:17,742 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 16:03:17,742 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 16:03:17,742 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 16:03:17,743 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 16:03:17,743 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fd260c0-b7f5-481a-bfe4-13d56e89a8ed/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 16:03:17,758 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 16:03:17,758 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 16:03:17,758 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 16:03:17,759 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 16:03:17,759 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 16:03:17,759 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 16:03:17,759 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 16:03:17,759 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 16:03:17,760 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 16:03:17,760 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 16:03:17,760 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 16:03:17,760 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 16:03:17,760 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 16:03:17,760 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 16:03:17,760 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 16:03:17,760 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 16:03:17,761 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 16:03:17,761 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 16:03:17,761 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 16:03:17,761 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 16:03:17,762 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 16:03:17,762 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 16:03:17,762 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 16:03:17,762 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 16:03:17,762 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 16:03:17,762 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 16:03:17,762 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 16:03:17,762 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 16:03:17,762 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 16:03:17,763 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 16:03:17,763 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 16:03:17,763 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 16:03:17,763 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 16:03:17,763 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 16:03:17,763 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 16:03:17,763 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 16:03:17,763 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 16:03:17,764 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 16:03:17,764 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 16:03:17,764 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 16:03:17,764 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 16:03:17,764 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fd260c0-b7f5-481a-bfe4-13d56e89a8ed/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fd260c0-b7f5-481a-bfe4-13d56e89a8ed/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6ffdc119181aa2456330d740041ecbf5eb23a58830499150b547bc21d0f8f549 [2022-12-14 16:03:17,936 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 16:03:17,952 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 16:03:17,954 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 16:03:17,955 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 16:03:17,955 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 16:03:17,956 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fd260c0-b7f5-481a-bfe4-13d56e89a8ed/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/float-benchs/divmul_diverge.c [2022-12-14 16:03:20,547 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 16:03:20,680 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 16:03:20,680 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fd260c0-b7f5-481a-bfe4-13d56e89a8ed/sv-benchmarks/c/float-benchs/divmul_diverge.c [2022-12-14 16:03:20,685 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fd260c0-b7f5-481a-bfe4-13d56e89a8ed/bin/utaipan-gh47qXpMRh/data/067fc103c/30b44fee4ac24666a4365ce3ff803f2d/FLAGe6ff50633 [2022-12-14 16:03:20,696 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fd260c0-b7f5-481a-bfe4-13d56e89a8ed/bin/utaipan-gh47qXpMRh/data/067fc103c/30b44fee4ac24666a4365ce3ff803f2d [2022-12-14 16:03:20,699 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 16:03:20,700 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 16:03:20,701 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 16:03:20,702 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 16:03:20,704 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 16:03:20,705 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:03:20" (1/1) ... [2022-12-14 16:03:20,705 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d220654 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:03:20, skipping insertion in model container [2022-12-14 16:03:20,706 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:03:20" (1/1) ... [2022-12-14 16:03:20,711 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 16:03:20,721 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 16:03:20,824 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fd260c0-b7f5-481a-bfe4-13d56e89a8ed/sv-benchmarks/c/float-benchs/divmul_diverge.c[613,626] [2022-12-14 16:03:20,834 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 16:03:20,841 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 16:03:20,850 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fd260c0-b7f5-481a-bfe4-13d56e89a8ed/sv-benchmarks/c/float-benchs/divmul_diverge.c[613,626] [2022-12-14 16:03:20,852 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 16:03:20,862 INFO L208 MainTranslator]: Completed translation [2022-12-14 16:03:20,863 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:03:20 WrapperNode [2022-12-14 16:03:20,863 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 16:03:20,863 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 16:03:20,863 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 16:03:20,864 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 16:03:20,869 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:03:20" (1/1) ... [2022-12-14 16:03:20,876 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:03:20" (1/1) ... [2022-12-14 16:03:20,892 INFO L138 Inliner]: procedures = 16, calls = 10, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 43 [2022-12-14 16:03:20,893 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 16:03:20,893 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 16:03:20,894 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 16:03:20,894 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 16:03:20,903 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:03:20" (1/1) ... [2022-12-14 16:03:20,903 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:03:20" (1/1) ... [2022-12-14 16:03:20,904 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:03:20" (1/1) ... [2022-12-14 16:03:20,904 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:03:20" (1/1) ... [2022-12-14 16:03:20,907 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:03:20" (1/1) ... [2022-12-14 16:03:20,911 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:03:20" (1/1) ... [2022-12-14 16:03:20,912 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:03:20" (1/1) ... [2022-12-14 16:03:20,913 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:03:20" (1/1) ... [2022-12-14 16:03:20,915 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 16:03:20,916 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 16:03:20,916 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 16:03:20,916 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 16:03:20,917 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:03:20" (1/1) ... [2022-12-14 16:03:20,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 16:03:20,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fd260c0-b7f5-481a-bfe4-13d56e89a8ed/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:03:20,945 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fd260c0-b7f5-481a-bfe4-13d56e89a8ed/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 16:03:20,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fd260c0-b7f5-481a-bfe4-13d56e89a8ed/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 16:03:20,981 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 16:03:20,981 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 16:03:20,981 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 16:03:20,982 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 16:03:21,041 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 16:03:21,042 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 16:03:21,111 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 16:03:21,143 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 16:03:21,144 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 16:03:21,145 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:03:21 BoogieIcfgContainer [2022-12-14 16:03:21,146 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 16:03:21,148 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 16:03:21,148 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 16:03:21,150 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 16:03:21,150 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 04:03:20" (1/3) ... [2022-12-14 16:03:21,151 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@100c49fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:03:21, skipping insertion in model container [2022-12-14 16:03:21,151 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:03:20" (2/3) ... [2022-12-14 16:03:21,151 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@100c49fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:03:21, skipping insertion in model container [2022-12-14 16:03:21,151 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:03:21" (3/3) ... [2022-12-14 16:03:21,152 INFO L112 eAbstractionObserver]: Analyzing ICFG divmul_diverge.c [2022-12-14 16:03:21,166 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 16:03:21,167 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 16:03:21,202 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 16:03:21,207 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=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5216f4d1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 16:03:21,207 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 16:03:21,210 INFO L276 IsEmpty]: Start isEmpty. Operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:03:21,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-12-14 16:03:21,214 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:03:21,215 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-12-14 16:03:21,215 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:03:21,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:03:21,219 INFO L85 PathProgramCache]: Analyzing trace with hash 2465126, now seen corresponding path program 1 times [2022-12-14 16:03:21,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:03:21,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604300534] [2022-12-14 16:03:21,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:03:21,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:03:21,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:03:21,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 16:03:21,345 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:03:21,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604300534] [2022-12-14 16:03:21,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604300534] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:03:21,346 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 16:03:21,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 16:03:21,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424418641] [2022-12-14 16:03:21,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:03:21,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 16:03:21,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:03:21,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 16:03:21,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 16:03:21,374 INFO L87 Difference]: Start difference. First operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 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 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:03:21,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:03:21,396 INFO L93 Difference]: Finished difference Result 13 states and 15 transitions. [2022-12-14 16:03:21,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 16:03:21,399 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 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 4 [2022-12-14 16:03:21,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:03:21,406 INFO L225 Difference]: With dead ends: 13 [2022-12-14 16:03:21,407 INFO L226 Difference]: Without dead ends: 6 [2022-12-14 16:03:21,409 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 16:03:21,413 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 16:03:21,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 16:03:21,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2022-12-14 16:03:21,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2022-12-14 16:03:21,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:03:21,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2022-12-14 16:03:21,438 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2022-12-14 16:03:21,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:03:21,438 INFO L495 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2022-12-14 16:03:21,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:03:21,439 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2022-12-14 16:03:21,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 16:03:21,439 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:03:21,439 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 16:03:21,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 16:03:21,440 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:03:21,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:03:21,441 INFO L85 PathProgramCache]: Analyzing trace with hash 76614925, now seen corresponding path program 1 times [2022-12-14 16:03:21,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:03:21,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975187953] [2022-12-14 16:03:21,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:03:21,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:03:21,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:03:21,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 16:03:21,516 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:03:21,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975187953] [2022-12-14 16:03:21,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975187953] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 16:03:21,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694882726] [2022-12-14 16:03:21,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:03:21,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:03:21,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fd260c0-b7f5-481a-bfe4-13d56e89a8ed/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:03:21,518 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fd260c0-b7f5-481a-bfe4-13d56e89a8ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:03:21,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fd260c0-b7f5-481a-bfe4-13d56e89a8ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 16:03:21,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:03:21,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 16:03:21,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:03:21,610 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 16:03:21,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 16:03:21,628 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 16:03:21,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694882726] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 16:03:21,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1901587013] [2022-12-14 16:03:21,643 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2022-12-14 16:03:21,644 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 16:03:21,647 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 16:03:21,651 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 16:03:21,651 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 16:03:21,854 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 16:03:21,913 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '69#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 3000000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 16:03:21,913 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 16:03:21,913 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 16:03:21,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-14 16:03:21,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877932735] [2022-12-14 16:03:21,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 16:03:21,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 16:03:21,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:03:21,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 16:03:21,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-12-14 16:03:21,916 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:03:21,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:03:21,933 INFO L93 Difference]: Finished difference Result 12 states and 14 transitions. [2022-12-14 16:03:21,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 16:03:21,933 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 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 5 [2022-12-14 16:03:21,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:03:21,934 INFO L225 Difference]: With dead ends: 12 [2022-12-14 16:03:21,934 INFO L226 Difference]: Without dead ends: 9 [2022-12-14 16:03:21,935 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-12-14 16:03:21,936 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 16:03:21,936 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 16:03:21,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2022-12-14 16:03:21,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2022-12-14 16:03:21,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:03:21,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2022-12-14 16:03:21,939 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 5 [2022-12-14 16:03:21,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:03:21,940 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2022-12-14 16:03:21,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:03:21,940 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2022-12-14 16:03:21,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-14 16:03:21,941 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:03:21,941 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1] [2022-12-14 16:03:21,947 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fd260c0-b7f5-481a-bfe4-13d56e89a8ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 16:03:22,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fd260c0-b7f5-481a-bfe4-13d56e89a8ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:03:22,142 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:03:22,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:03:22,142 INFO L85 PathProgramCache]: Analyzing trace with hash 2002243366, now seen corresponding path program 2 times [2022-12-14 16:03:22,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:03:22,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253625060] [2022-12-14 16:03:22,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:03:22,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:03:22,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:03:22,287 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 16:03:22,288 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:03:22,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253625060] [2022-12-14 16:03:22,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253625060] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 16:03:22,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911743508] [2022-12-14 16:03:22,289 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 16:03:22,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:03:22,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fd260c0-b7f5-481a-bfe4-13d56e89a8ed/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:03:22,290 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fd260c0-b7f5-481a-bfe4-13d56e89a8ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:03:22,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fd260c0-b7f5-481a-bfe4-13d56e89a8ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 16:03:22,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 16:03:22,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 16:03:22,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 16:03:22,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:03:22,350 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 16:03:22,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 16:03:22,396 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 16:03:22,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911743508] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 16:03:22,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1127603677] [2022-12-14 16:03:22,399 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2022-12-14 16:03:22,399 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 16:03:22,399 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 16:03:22,399 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 16:03:22,400 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 16:03:22,525 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 16:03:22,577 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '158#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 3000000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 16:03:22,577 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 16:03:22,578 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 16:03:22,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-12-14 16:03:22,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717826967] [2022-12-14 16:03:22,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 16:03:22,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 16:03:22,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:03:22,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 16:03:22,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2022-12-14 16:03:22,580 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 13 states, 13 states have (on average 1.2307692307692308) 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) [2022-12-14 16:03:22,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:03:22,597 INFO L93 Difference]: Finished difference Result 18 states and 23 transitions. [2022-12-14 16:03:22,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 16:03:22,598 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.2307692307692308) 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) Word has length 8 [2022-12-14 16:03:22,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:03:22,598 INFO L225 Difference]: With dead ends: 18 [2022-12-14 16:03:22,599 INFO L226 Difference]: Without dead ends: 15 [2022-12-14 16:03:22,599 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2022-12-14 16:03:22,600 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 16:03:22,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 16:03:22,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-12-14 16:03:22,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-12-14 16:03:22,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:03:22,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2022-12-14 16:03:22,604 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 8 [2022-12-14 16:03:22,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:03:22,605 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2022-12-14 16:03:22,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.2307692307692308) 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) [2022-12-14 16:03:22,605 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2022-12-14 16:03:22,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-14 16:03:22,606 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:03:22,606 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1] [2022-12-14 16:03:22,610 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fd260c0-b7f5-481a-bfe4-13d56e89a8ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 16:03:22,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fd260c0-b7f5-481a-bfe4-13d56e89a8ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:03:22,807 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:03:22,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:03:22,808 INFO L85 PathProgramCache]: Analyzing trace with hash -2001324602, now seen corresponding path program 3 times [2022-12-14 16:03:22,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:03:22,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970959156] [2022-12-14 16:03:22,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:03:22,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:03:22,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:03:23,112 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 16:03:23,113 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:03:23,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970959156] [2022-12-14 16:03:23,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970959156] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 16:03:23,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636442336] [2022-12-14 16:03:23,113 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 16:03:23,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:03:23,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fd260c0-b7f5-481a-bfe4-13d56e89a8ed/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:03:23,115 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fd260c0-b7f5-481a-bfe4-13d56e89a8ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:03:23,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fd260c0-b7f5-481a-bfe4-13d56e89a8ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 16:03:23,168 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 16:03:23,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 16:03:23,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 16:03:23,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:03:23,198 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 16:03:23,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 16:03:23,351 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 16:03:23,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636442336] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 16:03:23,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [702249382] [2022-12-14 16:03:23,353 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2022-12-14 16:03:23,353 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 16:03:23,353 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 16:03:23,353 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 16:03:23,353 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 16:03:23,427 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 16:03:23,478 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '319#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 3000000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 16:03:23,478 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 16:03:23,479 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 16:03:23,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-12-14 16:03:23,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916494006] [2022-12-14 16:03:23,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 16:03:23,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-14 16:03:23,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:03:23,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-14 16:03:23,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=309, Invalid=447, Unknown=0, NotChecked=0, Total=756 [2022-12-14 16:03:23,481 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 25 states, 25 states have (on average 1.12) internal successors, (28), 24 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) [2022-12-14 16:03:23,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:03:23,508 INFO L93 Difference]: Finished difference Result 30 states and 41 transitions. [2022-12-14 16:03:23,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-14 16:03:23,508 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.12) internal successors, (28), 24 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 14 [2022-12-14 16:03:23,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:03:23,509 INFO L225 Difference]: With dead ends: 30 [2022-12-14 16:03:23,509 INFO L226 Difference]: Without dead ends: 27 [2022-12-14 16:03:23,510 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=309, Invalid=447, Unknown=0, NotChecked=0, Total=756 [2022-12-14 16:03:23,510 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 16:03:23,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 4 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 16:03:23,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-12-14 16:03:23,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-12-14 16:03:23,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 26 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:03:23,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2022-12-14 16:03:23,514 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 14 [2022-12-14 16:03:23,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:03:23,514 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2022-12-14 16:03:23,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.12) internal successors, (28), 24 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) [2022-12-14 16:03:23,514 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2022-12-14 16:03:23,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-12-14 16:03:23,515 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:03:23,515 INFO L195 NwaCegarLoop]: trace histogram [22, 1, 1, 1, 1] [2022-12-14 16:03:23,520 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fd260c0-b7f5-481a-bfe4-13d56e89a8ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 16:03:23,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fd260c0-b7f5-481a-bfe4-13d56e89a8ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:03:23,716 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:03:23,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:03:23,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1578198266, now seen corresponding path program 4 times [2022-12-14 16:03:23,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:03:23,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78082375] [2022-12-14 16:03:23,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:03:23,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:03:23,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:03:24,248 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 16:03:24,248 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:03:24,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78082375] [2022-12-14 16:03:24,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78082375] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 16:03:24,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681826240] [2022-12-14 16:03:24,249 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 16:03:24,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:03:24,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fd260c0-b7f5-481a-bfe4-13d56e89a8ed/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:03:24,250 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fd260c0-b7f5-481a-bfe4-13d56e89a8ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:03:24,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fd260c0-b7f5-481a-bfe4-13d56e89a8ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 16:03:24,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:03:24,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 16:03:24,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:03:24,345 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 16:03:24,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 16:03:24,846 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 16:03:24,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681826240] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 16:03:24,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1827179118] [2022-12-14 16:03:24,848 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2022-12-14 16:03:24,848 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 16:03:24,848 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 16:03:24,848 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 16:03:24,848 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 16:03:24,913 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 16:03:24,980 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '624#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 3000000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 16:03:24,980 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 16:03:24,980 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 16:03:24,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2022-12-14 16:03:24,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201719196] [2022-12-14 16:03:24,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 16:03:24,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-12-14 16:03:24,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:03:24,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-12-14 16:03:24,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1185, Invalid=1467, Unknown=0, NotChecked=0, Total=2652 [2022-12-14 16:03:24,983 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand has 49 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 48 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:03:25,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:03:25,033 INFO L93 Difference]: Finished difference Result 54 states and 77 transitions. [2022-12-14 16:03:25,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-12-14 16:03:25,034 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 48 states have internal predecessors, (52), 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 26 [2022-12-14 16:03:25,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:03:25,035 INFO L225 Difference]: With dead ends: 54 [2022-12-14 16:03:25,035 INFO L226 Difference]: Without dead ends: 51 [2022-12-14 16:03:25,036 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1185, Invalid=1467, Unknown=0, NotChecked=0, Total=2652 [2022-12-14 16:03:25,037 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 16:03:25,037 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 10 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 16:03:25,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-12-14 16:03:25,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-12-14 16:03:25,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.02) internal successors, (51), 50 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:03:25,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2022-12-14 16:03:25,045 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 26 [2022-12-14 16:03:25,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:03:25,045 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2022-12-14 16:03:25,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 48 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:03:25,045 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2022-12-14 16:03:25,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-12-14 16:03:25,046 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:03:25,046 INFO L195 NwaCegarLoop]: trace histogram [46, 1, 1, 1, 1] [2022-12-14 16:03:25,051 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fd260c0-b7f5-481a-bfe4-13d56e89a8ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-14 16:03:25,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fd260c0-b7f5-481a-bfe4-13d56e89a8ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:03:25,248 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:03:25,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:03:25,249 INFO L85 PathProgramCache]: Analyzing trace with hash 86361478, now seen corresponding path program 5 times [2022-12-14 16:03:25,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:03:25,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913033840] [2022-12-14 16:03:25,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:03:25,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:03:25,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:03:26,679 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 16:03:26,680 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:03:26,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913033840] [2022-12-14 16:03:26,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913033840] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 16:03:26,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844736356] [2022-12-14 16:03:26,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 16:03:26,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:03:26,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fd260c0-b7f5-481a-bfe4-13d56e89a8ed/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:03:26,681 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fd260c0-b7f5-481a-bfe4-13d56e89a8ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:03:26,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fd260c0-b7f5-481a-bfe4-13d56e89a8ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 16:03:26,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2022-12-14 16:03:26,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 16:03:26,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 48 conjunts are in the unsatisfiable core [2022-12-14 16:03:26,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:03:26,892 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 16:03:26,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 16:03:28,498 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 16:03:28,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844736356] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 16:03:28,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [370797535] [2022-12-14 16:03:28,500 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2022-12-14 16:03:28,500 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 16:03:28,500 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 16:03:28,500 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 16:03:28,500 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 16:03:28,554 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 16:03:28,653 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1217#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 3000000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 16:03:28,654 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 16:03:28,654 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 16:03:28,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 96 [2022-12-14 16:03:28,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219316495] [2022-12-14 16:03:28,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 16:03:28,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-12-14 16:03:28,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:03:28,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-12-14 16:03:28,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4665, Invalid=5235, Unknown=0, NotChecked=0, Total=9900 [2022-12-14 16:03:28,663 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand has 97 states, 97 states have (on average 1.0309278350515463) internal successors, (100), 96 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:03:28,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:03:28,773 INFO L93 Difference]: Finished difference Result 102 states and 149 transitions. [2022-12-14 16:03:28,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-12-14 16:03:28,773 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.0309278350515463) internal successors, (100), 96 states have internal predecessors, (100), 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 50 [2022-12-14 16:03:28,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:03:28,775 INFO L225 Difference]: With dead ends: 102 [2022-12-14 16:03:28,775 INFO L226 Difference]: Without dead ends: 99 [2022-12-14 16:03:28,778 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 607 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=4665, Invalid=5235, Unknown=0, NotChecked=0, Total=9900 [2022-12-14 16:03:28,779 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 16:03:28,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 16:03:28,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-12-14 16:03:28,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2022-12-14 16:03:28,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.010204081632653) internal successors, (99), 98 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:03:28,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2022-12-14 16:03:28,785 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 50 [2022-12-14 16:03:28,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:03:28,786 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2022-12-14 16:03:28,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 1.0309278350515463) internal successors, (100), 96 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:03:28,786 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2022-12-14 16:03:28,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-12-14 16:03:28,787 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:03:28,787 INFO L195 NwaCegarLoop]: trace histogram [94, 1, 1, 1, 1] [2022-12-14 16:03:28,793 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fd260c0-b7f5-481a-bfe4-13d56e89a8ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 16:03:28,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fd260c0-b7f5-481a-bfe4-13d56e89a8ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:03:28,989 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:03:28,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:03:28,990 INFO L85 PathProgramCache]: Analyzing trace with hash -915563898, now seen corresponding path program 6 times [2022-12-14 16:03:28,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:03:28,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021828905] [2022-12-14 16:03:28,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:03:28,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:03:29,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:03:33,159 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 16:03:33,159 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:03:33,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021828905] [2022-12-14 16:03:33,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021828905] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 16:03:33,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835386523] [2022-12-14 16:03:33,160 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 16:03:33,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:03:33,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fd260c0-b7f5-481a-bfe4-13d56e89a8ed/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:03:33,160 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fd260c0-b7f5-481a-bfe4-13d56e89a8ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:03:33,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fd260c0-b7f5-481a-bfe4-13d56e89a8ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 16:03:33,325 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 16:03:33,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 16:03:33,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 96 conjunts are in the unsatisfiable core [2022-12-14 16:03:33,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:03:33,435 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 16:03:33,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 16:03:39,248 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 16:03:39,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835386523] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 16:03:39,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1997900765] [2022-12-14 16:03:39,249 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2022-12-14 16:03:39,249 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 16:03:39,249 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 16:03:39,250 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 16:03:39,250 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 16:03:39,302 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 16:03:39,426 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2386#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 3000000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 16:03:39,426 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 16:03:39,426 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 16:03:39,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96, 96] total 192 [2022-12-14 16:03:39,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262077597] [2022-12-14 16:03:39,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 16:03:39,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2022-12-14 16:03:39,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:03:39,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2022-12-14 16:03:39,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18537, Invalid=19683, Unknown=0, NotChecked=0, Total=38220 [2022-12-14 16:03:39,436 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand has 193 states, 193 states have (on average 1.0155440414507773) internal successors, (196), 192 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:03:39,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:03:39,778 INFO L93 Difference]: Finished difference Result 198 states and 293 transitions. [2022-12-14 16:03:39,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2022-12-14 16:03:39,778 INFO L78 Accepts]: Start accepts. Automaton has has 193 states, 193 states have (on average 1.0155440414507773) internal successors, (196), 192 states have internal predecessors, (196), 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 98 [2022-12-14 16:03:39,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:03:39,781 INFO L225 Difference]: With dead ends: 198 [2022-12-14 16:03:39,781 INFO L226 Difference]: Without dead ends: 195 [2022-12-14 16:03:39,784 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1231 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=18537, Invalid=19683, Unknown=0, NotChecked=0, Total=38220 [2022-12-14 16:03:39,785 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 16:03:39,785 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 16:03:39,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-12-14 16:03:39,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2022-12-14 16:03:39,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 1.0051546391752577) internal successors, (195), 194 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:03:39,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 195 transitions. [2022-12-14 16:03:39,799 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 195 transitions. Word has length 98 [2022-12-14 16:03:39,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:03:39,799 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 195 transitions. [2022-12-14 16:03:39,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 193 states, 193 states have (on average 1.0155440414507773) internal successors, (196), 192 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:03:39,799 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 195 transitions. [2022-12-14 16:03:39,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-12-14 16:03:39,801 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:03:39,801 INFO L195 NwaCegarLoop]: trace histogram [190, 1, 1, 1, 1] [2022-12-14 16:03:39,807 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fd260c0-b7f5-481a-bfe4-13d56e89a8ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-14 16:03:40,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fd260c0-b7f5-481a-bfe4-13d56e89a8ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:03:40,003 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:03:40,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:03:40,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1600341126, now seen corresponding path program 7 times [2022-12-14 16:03:40,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:03:40,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281830393] [2022-12-14 16:03:40,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:03:40,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:03:40,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:03:54,991 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 16:03:54,991 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:03:54,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281830393] [2022-12-14 16:03:54,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281830393] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 16:03:54,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040514341] [2022-12-14 16:03:54,991 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 16:03:54,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:03:54,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fd260c0-b7f5-481a-bfe4-13d56e89a8ed/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:03:54,992 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fd260c0-b7f5-481a-bfe4-13d56e89a8ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:03:54,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fd260c0-b7f5-481a-bfe4-13d56e89a8ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 16:03:55,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:03:55,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 1175 conjuncts, 192 conjunts are in the unsatisfiable core [2022-12-14 16:03:55,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:03:55,495 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 16:03:55,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 16:04:19,760 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 16:04:19,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040514341] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 16:04:19,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [708389633] [2022-12-14 16:04:19,761 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2022-12-14 16:04:19,761 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 16:04:19,761 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 16:04:19,761 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 16:04:19,761 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 16:04:19,816 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 16:04:20,141 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4707#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 3000000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 16:04:20,142 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 16:04:20,142 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 16:04:20,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [192, 192, 192] total 384 [2022-12-14 16:04:20,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338184040] [2022-12-14 16:04:20,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 16:04:20,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 385 states [2022-12-14 16:04:20,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:04:20,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 385 interpolants. [2022-12-14 16:04:20,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73929, Invalid=76227, Unknown=0, NotChecked=0, Total=150156 [2022-12-14 16:04:20,161 INFO L87 Difference]: Start difference. First operand 195 states and 195 transitions. Second operand has 385 states, 385 states have (on average 1.0077922077922077) internal successors, (388), 384 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:04:21,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:04:21,696 INFO L93 Difference]: Finished difference Result 390 states and 581 transitions. [2022-12-14 16:04:21,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 384 states. [2022-12-14 16:04:21,697 INFO L78 Accepts]: Start accepts. Automaton has has 385 states, 385 states have (on average 1.0077922077922077) internal successors, (388), 384 states have internal predecessors, (388), 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 194 [2022-12-14 16:04:21,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:04:21,698 INFO L225 Difference]: With dead ends: 390 [2022-12-14 16:04:21,698 INFO L226 Difference]: Without dead ends: 387 [2022-12-14 16:04:21,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 772 GetRequests, 386 SyntacticMatches, 0 SemanticMatches, 386 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2479 ImplicationChecksByTransitivity, 33.0s TimeCoverageRelationStatistics Valid=73929, Invalid=76227, Unknown=0, NotChecked=0, Total=150156 [2022-12-14 16:04:21,704 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 16:04:21,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 393 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 16:04:21,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2022-12-14 16:04:21,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 387. [2022-12-14 16:04:21,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 386 states have (on average 1.0025906735751295) internal successors, (387), 386 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:04:21,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 387 transitions. [2022-12-14 16:04:21,719 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 387 transitions. Word has length 194 [2022-12-14 16:04:21,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:04:21,719 INFO L495 AbstractCegarLoop]: Abstraction has 387 states and 387 transitions. [2022-12-14 16:04:21,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 385 states, 385 states have (on average 1.0077922077922077) internal successors, (388), 384 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:04:21,720 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 387 transitions. [2022-12-14 16:04:21,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2022-12-14 16:04:21,724 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:04:21,724 INFO L195 NwaCegarLoop]: trace histogram [382, 1, 1, 1, 1] [2022-12-14 16:04:21,731 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fd260c0-b7f5-481a-bfe4-13d56e89a8ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-12-14 16:04:21,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fd260c0-b7f5-481a-bfe4-13d56e89a8ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-12-14 16:04:21,926 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:04:21,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:04:21,927 INFO L85 PathProgramCache]: Analyzing trace with hash 1894160518, now seen corresponding path program 8 times [2022-12-14 16:04:21,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:04:21,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806002812] [2022-12-14 16:04:21,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:04:21,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:04:22,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:05:26,521 INFO L134 CoverageAnalysis]: Checked inductivity of 73153 backedges. 0 proven. 73153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 16:05:26,522 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:05:26,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806002812] [2022-12-14 16:05:26,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806002812] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 16:05:26,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513542599] [2022-12-14 16:05:26,522 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 16:05:26,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:05:26,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fd260c0-b7f5-481a-bfe4-13d56e89a8ed/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:05:26,523 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fd260c0-b7f5-481a-bfe4-13d56e89a8ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:05:26,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fd260c0-b7f5-481a-bfe4-13d56e89a8ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 16:05:28,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 192 check-sat command(s) [2022-12-14 16:05:28,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 16:05:28,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 2327 conjuncts, 384 conjunts are in the unsatisfiable core [2022-12-14 16:05:28,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:05:29,040 INFO L134 CoverageAnalysis]: Checked inductivity of 73153 backedges. 0 proven. 73153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 16:05:29,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 16:07:15,873 INFO L134 CoverageAnalysis]: Checked inductivity of 73153 backedges. 0 proven. 73153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 16:07:15,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513542599] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 16:07:15,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [967365826] [2022-12-14 16:07:15,875 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2022-12-14 16:07:15,876 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 16:07:15,876 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 16:07:15,876 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 16:07:15,876 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 16:07:15,925 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 16:07:16,561 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9332#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 3000000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 16:07:16,562 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 16:07:16,562 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 16:07:16,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [384, 384, 384] total 768 [2022-12-14 16:07:16,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879037755] [2022-12-14 16:07:16,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 16:07:16,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 769 states [2022-12-14 16:07:16,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:07:16,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 769 interpolants. [2022-12-14 16:07:16,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=295305, Invalid=299907, Unknown=0, NotChecked=0, Total=595212 [2022-12-14 16:07:16,630 INFO L87 Difference]: Start difference. First operand 387 states and 387 transitions. Second operand has 769 states, 769 states have (on average 1.0039011703511054) internal successors, (772), 768 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:07:31,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:07:31,447 INFO L93 Difference]: Finished difference Result 774 states and 1157 transitions. [2022-12-14 16:07:31,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 768 states. [2022-12-14 16:07:31,449 INFO L78 Accepts]: Start accepts. Automaton has has 769 states, 769 states have (on average 1.0039011703511054) internal successors, (772), 768 states have internal predecessors, (772), 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 386 [2022-12-14 16:07:31,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:07:31,454 INFO L225 Difference]: With dead ends: 774 [2022-12-14 16:07:31,454 INFO L226 Difference]: Without dead ends: 771 [2022-12-14 16:07:31,481 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1540 GetRequests, 770 SyntacticMatches, 0 SemanticMatches, 770 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4975 ImplicationChecksByTransitivity, 140.8s TimeCoverageRelationStatistics Valid=295305, Invalid=299907, Unknown=0, NotChecked=0, Total=595212 [2022-12-14 16:07:31,482 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 779 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 779 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 16:07:31,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 779 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 16:07:31,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2022-12-14 16:07:31,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 771. [2022-12-14 16:07:31,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 771 states, 770 states have (on average 1.0012987012987014) internal successors, (771), 770 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:07:31,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 771 states to 771 states and 771 transitions. [2022-12-14 16:07:31,502 INFO L78 Accepts]: Start accepts. Automaton has 771 states and 771 transitions. Word has length 386 [2022-12-14 16:07:31,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:07:31,503 INFO L495 AbstractCegarLoop]: Abstraction has 771 states and 771 transitions. [2022-12-14 16:07:31,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 769 states, 769 states have (on average 1.0039011703511054) internal successors, (772), 768 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:07:31,504 INFO L276 IsEmpty]: Start isEmpty. Operand 771 states and 771 transitions. [2022-12-14 16:07:31,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 771 [2022-12-14 16:07:31,517 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:07:31,518 INFO L195 NwaCegarLoop]: trace histogram [766, 1, 1, 1, 1] [2022-12-14 16:07:31,530 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fd260c0-b7f5-481a-bfe4-13d56e89a8ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 16:07:31,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fd260c0-b7f5-481a-bfe4-13d56e89a8ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:07:31,719 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:07:31,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:07:31,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1437777786, now seen corresponding path program 9 times [2022-12-14 16:07:31,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:07:31,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453209858] [2022-12-14 16:07:31,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:07:31,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:07:34,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:13:07,106 INFO L134 CoverageAnalysis]: Checked inductivity of 293761 backedges. 0 proven. 293761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 16:13:07,106 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:13:07,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453209858] [2022-12-14 16:13:07,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453209858] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 16:13:07,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839401078] [2022-12-14 16:13:07,107 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 16:13:07,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:13:07,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fd260c0-b7f5-481a-bfe4-13d56e89a8ed/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:13:07,108 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fd260c0-b7f5-481a-bfe4-13d56e89a8ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:13:07,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fd260c0-b7f5-481a-bfe4-13d56e89a8ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 16:13:08,345 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 16:13:08,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 16:13:08,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 4631 conjuncts, 768 conjunts are in the unsatisfiable core [2022-12-14 16:13:08,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:13:09,085 INFO L134 CoverageAnalysis]: Checked inductivity of 293761 backedges. 0 proven. 293761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 16:13:09,086 INFO L328 TraceCheckSpWp]: Computing backward predicates...