./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-simple/nested_3.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3115c1f4-19cd-4af2-876e-1078da5a42ce/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3115c1f4-19cd-4af2-876e-1078da5a42ce/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3115c1f4-19cd-4af2-876e-1078da5a42ce/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3115c1f4-19cd-4af2-876e-1078da5a42ce/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-simple/nested_3.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3115c1f4-19cd-4af2-876e-1078da5a42ce/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3115c1f4-19cd-4af2-876e-1078da5a42ce/bin/utaipan-ByfvJB40ur --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 6a30debb45adf4eb2040807436dec0136066a492a6c11eb0dbebd1f179f328d9 --- 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-38b53e6 [2022-11-26 00:22:33,727 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 00:22:33,730 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 00:22:33,765 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 00:22:33,766 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 00:22:33,767 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 00:22:33,769 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 00:22:33,771 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 00:22:33,777 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 00:22:33,784 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 00:22:33,785 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 00:22:33,789 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 00:22:33,789 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 00:22:33,792 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 00:22:33,795 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 00:22:33,797 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 00:22:33,800 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 00:22:33,801 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 00:22:33,803 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 00:22:33,811 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 00:22:33,812 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 00:22:33,815 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 00:22:33,817 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 00:22:33,818 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 00:22:33,829 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 00:22:33,830 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 00:22:33,830 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 00:22:33,832 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 00:22:33,833 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 00:22:33,834 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 00:22:33,834 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 00:22:33,835 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 00:22:33,838 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 00:22:33,840 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 00:22:33,841 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 00:22:33,842 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 00:22:33,843 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 00:22:33,843 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 00:22:33,843 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 00:22:33,845 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 00:22:33,846 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 00:22:33,847 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3115c1f4-19cd-4af2-876e-1078da5a42ce/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-26 00:22:33,902 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 00:22:33,902 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 00:22:33,903 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 00:22:33,903 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 00:22:33,904 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 00:22:33,905 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 00:22:33,905 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 00:22:33,905 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 00:22:33,905 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 00:22:33,906 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 00:22:33,907 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 00:22:33,907 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 00:22:33,908 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 00:22:33,908 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 00:22:33,908 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 00:22:33,909 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 00:22:33,909 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 00:22:33,909 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 00:22:33,910 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 00:22:33,910 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-26 00:22:33,911 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 00:22:33,911 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-26 00:22:33,911 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 00:22:33,912 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-26 00:22:33,912 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 00:22:33,912 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-26 00:22:33,913 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-26 00:22:33,913 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-26 00:22:33,914 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 00:22:33,914 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-26 00:22:33,915 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 00:22:33,915 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 00:22:33,915 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:22:33,916 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 00:22:33,916 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 00:22:33,916 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 00:22:33,917 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-26 00:22:33,917 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 00:22:33,917 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 00:22:33,918 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-26 00:22:33,918 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 00:22:33,931 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_3115c1f4-19cd-4af2-876e-1078da5a42ce/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3115c1f4-19cd-4af2-876e-1078da5a42ce/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6a30debb45adf4eb2040807436dec0136066a492a6c11eb0dbebd1f179f328d9 [2022-11-26 00:22:34,247 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 00:22:34,284 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 00:22:34,287 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 00:22:34,289 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 00:22:34,289 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 00:22:34,291 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3115c1f4-19cd-4af2-876e-1078da5a42ce/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/loop-simple/nested_3.c [2022-11-26 00:22:37,449 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 00:22:37,680 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 00:22:37,681 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3115c1f4-19cd-4af2-876e-1078da5a42ce/sv-benchmarks/c/loop-simple/nested_3.c [2022-11-26 00:22:37,687 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3115c1f4-19cd-4af2-876e-1078da5a42ce/bin/utaipan-ByfvJB40ur/data/d3c957e2f/2134150c7ffc485e81331db455d2c1f8/FLAGa24705bf4 [2022-11-26 00:22:37,705 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3115c1f4-19cd-4af2-876e-1078da5a42ce/bin/utaipan-ByfvJB40ur/data/d3c957e2f/2134150c7ffc485e81331db455d2c1f8 [2022-11-26 00:22:37,708 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 00:22:37,710 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 00:22:37,715 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 00:22:37,715 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 00:22:37,719 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 00:22:37,720 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:22:37" (1/1) ... [2022-11-26 00:22:37,721 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4357cdc2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:22:37, skipping insertion in model container [2022-11-26 00:22:37,722 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:22:37" (1/1) ... [2022-11-26 00:22:37,729 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 00:22:37,744 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 00:22:37,934 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_3115c1f4-19cd-4af2-876e-1078da5a42ce/sv-benchmarks/c/loop-simple/nested_3.c[784,797] [2022-11-26 00:22:37,940 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:22:37,954 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 00:22:37,971 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_3115c1f4-19cd-4af2-876e-1078da5a42ce/sv-benchmarks/c/loop-simple/nested_3.c[784,797] [2022-11-26 00:22:37,972 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:22:37,986 INFO L208 MainTranslator]: Completed translation [2022-11-26 00:22:37,987 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:22:37 WrapperNode [2022-11-26 00:22:37,987 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 00:22:37,988 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 00:22:37,988 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 00:22:37,989 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 00:22:37,996 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:22:37" (1/1) ... [2022-11-26 00:22:38,003 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:22:37" (1/1) ... [2022-11-26 00:22:38,021 INFO L138 Inliner]: procedures = 10, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 41 [2022-11-26 00:22:38,021 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 00:22:38,022 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 00:22:38,022 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 00:22:38,023 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 00:22:38,032 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:22:37" (1/1) ... [2022-11-26 00:22:38,032 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:22:37" (1/1) ... [2022-11-26 00:22:38,035 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:22:37" (1/1) ... [2022-11-26 00:22:38,035 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:22:37" (1/1) ... [2022-11-26 00:22:38,046 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:22:37" (1/1) ... [2022-11-26 00:22:38,054 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:22:37" (1/1) ... [2022-11-26 00:22:38,057 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:22:37" (1/1) ... [2022-11-26 00:22:38,058 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:22:37" (1/1) ... [2022-11-26 00:22:38,065 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 00:22:38,068 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 00:22:38,069 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 00:22:38,069 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 00:22:38,070 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:22:37" (1/1) ... [2022-11-26 00:22:38,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:22:38,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3115c1f4-19cd-4af2-876e-1078da5a42ce/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:22:38,110 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3115c1f4-19cd-4af2-876e-1078da5a42ce/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 00:22:38,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3115c1f4-19cd-4af2-876e-1078da5a42ce/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 00:22:38,155 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 00:22:38,155 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 00:22:38,156 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 00:22:38,156 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-26 00:22:38,219 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 00:22:38,221 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 00:22:38,326 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 00:22:38,351 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 00:22:38,352 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-26 00:22:38,354 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:22:38 BoogieIcfgContainer [2022-11-26 00:22:38,354 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 00:22:38,357 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 00:22:38,357 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 00:22:38,360 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 00:22:38,361 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:22:37" (1/3) ... [2022-11-26 00:22:38,362 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dcdfe83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:22:38, skipping insertion in model container [2022-11-26 00:22:38,362 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:22:37" (2/3) ... [2022-11-26 00:22:38,362 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dcdfe83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:22:38, skipping insertion in model container [2022-11-26 00:22:38,362 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:22:38" (3/3) ... [2022-11-26 00:22:38,364 INFO L112 eAbstractionObserver]: Analyzing ICFG nested_3.c [2022-11-26 00:22:38,383 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 00:22:38,384 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-26 00:22:38,432 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 00:22:38,439 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;@52609ff0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 00:22:38,439 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-26 00:22:38,443 INFO L276 IsEmpty]: Start isEmpty. Operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:22:38,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-26 00:22:38,450 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:22:38,451 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-26 00:22:38,451 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:22:38,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:22:38,457 INFO L85 PathProgramCache]: Analyzing trace with hash 2587396, now seen corresponding path program 1 times [2022-11-26 00:22:38,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:22:38,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575929406] [2022-11-26 00:22:38,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:22:38,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:22:38,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:22:38,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:22:38,658 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:22:38,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575929406] [2022-11-26 00:22:38,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575929406] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:22:38,659 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:22:38,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 00:22:38,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506982743] [2022-11-26 00:22:38,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:22:38,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:22:38,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:22:38,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:22:38,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:22:38,700 INFO L87 Difference]: Start difference. First operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 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) [2022-11-26 00:22:38,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:22:38,770 INFO L93 Difference]: Finished difference Result 17 states and 23 transitions. [2022-11-26 00:22:38,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:22:38,773 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 [2022-11-26 00:22:38,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:22:38,782 INFO L225 Difference]: With dead ends: 17 [2022-11-26 00:22:38,782 INFO L226 Difference]: Without dead ends: 10 [2022-11-26 00:22:38,786 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:22:38,791 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 4 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:22:38,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 6 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:22:38,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2022-11-26 00:22:38,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 8. [2022-11-26 00:22:38,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 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) [2022-11-26 00:22:38,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 10 transitions. [2022-11-26 00:22:38,854 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 10 transitions. Word has length 4 [2022-11-26 00:22:38,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:22:38,856 INFO L495 AbstractCegarLoop]: Abstraction has 8 states and 10 transitions. [2022-11-26 00:22:38,857 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) [2022-11-26 00:22:38,857 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 10 transitions. [2022-11-26 00:22:38,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-26 00:22:38,858 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:22:38,858 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-26 00:22:38,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-26 00:22:38,860 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:22:38,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:22:38,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1850411630, now seen corresponding path program 1 times [2022-11-26 00:22:38,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:22:38,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718502021] [2022-11-26 00:22:38,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:22:38,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:22:38,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:22:38,945 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:22:38,946 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:22:38,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718502021] [2022-11-26 00:22:38,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718502021] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:22:38,947 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:22:38,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:22:38,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791690736] [2022-11-26 00:22:38,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:22:38,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:22:38,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:22:38,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:22:38,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:22:38,951 INFO L87 Difference]: Start difference. First operand 8 states and 10 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 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) [2022-11-26 00:22:38,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:22:38,978 INFO L93 Difference]: Finished difference Result 16 states and 22 transitions. [2022-11-26 00:22:38,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:22:38,980 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 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) Word has length 6 [2022-11-26 00:22:38,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:22:38,980 INFO L225 Difference]: With dead ends: 16 [2022-11-26 00:22:38,981 INFO L226 Difference]: Without dead ends: 10 [2022-11-26 00:22:38,981 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:22:38,983 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:22:38,984 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 4 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:22:38,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2022-11-26 00:22:38,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2022-11-26 00:22:38,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:22:38,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 11 transitions. [2022-11-26 00:22:38,988 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 11 transitions. Word has length 6 [2022-11-26 00:22:38,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:22:38,989 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 11 transitions. [2022-11-26 00:22:38,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 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) [2022-11-26 00:22:38,990 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 11 transitions. [2022-11-26 00:22:38,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-26 00:22:38,990 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:22:38,991 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:22:38,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-26 00:22:38,991 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:22:38,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:22:38,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1329143110, now seen corresponding path program 1 times [2022-11-26 00:22:38,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:22:38,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569892591] [2022-11-26 00:22:38,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:22:38,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:22:39,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:22:39,091 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:22:39,092 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:22:39,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569892591] [2022-11-26 00:22:39,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569892591] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:22:39,093 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:22:39,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:22:39,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202038732] [2022-11-26 00:22:39,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:22:39,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:22:39,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:22:39,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:22:39,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:22:39,095 INFO L87 Difference]: Start difference. First operand 9 states and 11 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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) [2022-11-26 00:22:39,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:22:39,116 INFO L93 Difference]: Finished difference Result 17 states and 22 transitions. [2022-11-26 00:22:39,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:22:39,117 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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) Word has length 8 [2022-11-26 00:22:39,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:22:39,118 INFO L225 Difference]: With dead ends: 17 [2022-11-26 00:22:39,118 INFO L226 Difference]: Without dead ends: 10 [2022-11-26 00:22:39,119 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:22:39,120 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:22:39,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:22:39,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2022-11-26 00:22:39,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2022-11-26 00:22:39,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:22:39,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2022-11-26 00:22:39,125 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 8 [2022-11-26 00:22:39,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:22:39,126 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2022-11-26 00:22:39,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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) [2022-11-26 00:22:39,127 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2022-11-26 00:22:39,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-26 00:22:39,127 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:22:39,128 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:22:39,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-26 00:22:39,128 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:22:39,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:22:39,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1572747232, now seen corresponding path program 1 times [2022-11-26 00:22:39,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:22:39,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701113325] [2022-11-26 00:22:39,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:22:39,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:22:39,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:22:39,191 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:22:39,191 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:22:39,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701113325] [2022-11-26 00:22:39,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701113325] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:22:39,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788512388] [2022-11-26 00:22:39,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:22:39,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:22:39,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3115c1f4-19cd-4af2-876e-1078da5a42ce/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:22:39,197 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3115c1f4-19cd-4af2-876e-1078da5a42ce/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:22:39,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3115c1f4-19cd-4af2-876e-1078da5a42ce/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-26 00:22:39,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:22:39,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-26 00:22:39,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:22:39,326 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:22:39,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:22:39,356 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:22:39,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788512388] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:22:39,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1028647848] [2022-11-26 00:22:39,385 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-26 00:22:39,386 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:22:39,413 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:22:39,426 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:22:39,427 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:22:40,095 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:22:40,300 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '195#(and (<= 6 |ULTIMATE.start_main_~b~0#1|) (<= 6 |ULTIMATE.start_main_~a~0#1|) (<= 6 |ULTIMATE.start_main_~c~0#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (or (not (= 6 |ULTIMATE.start_main_~a~0#1|)) (not (= 6 |ULTIMATE.start_main_~c~0#1|)) (not (= 6 |ULTIMATE.start_main_~b~0#1|))) (= |#NULL.base| 0))' at error location [2022-11-26 00:22:40,300 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:22:40,300 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:22:40,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-26 00:22:40,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135674062] [2022-11-26 00:22:40,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:22:40,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-26 00:22:40,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:22:40,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-26 00:22:40,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-26 00:22:40,310 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:22:40,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:22:40,354 INFO L93 Difference]: Finished difference Result 21 states and 28 transitions. [2022-11-26 00:22:40,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 00:22:40,356 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 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 9 [2022-11-26 00:22:40,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:22:40,357 INFO L225 Difference]: With dead ends: 21 [2022-11-26 00:22:40,357 INFO L226 Difference]: Without dead ends: 13 [2022-11-26 00:22:40,362 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-26 00:22:40,368 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:22:40,370 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:22:40,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-11-26 00:22:40,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-11-26 00:22:40,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 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) [2022-11-26 00:22:40,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2022-11-26 00:22:40,381 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 9 [2022-11-26 00:22:40,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:22:40,382 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2022-11-26 00:22:40,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:22:40,383 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2022-11-26 00:22:40,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-26 00:22:40,384 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:22:40,384 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:22:40,395 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3115c1f4-19cd-4af2-876e-1078da5a42ce/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-26 00:22:40,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3115c1f4-19cd-4af2-876e-1078da5a42ce/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:22:40,591 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:22:40,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:22:40,591 INFO L85 PathProgramCache]: Analyzing trace with hash -561644486, now seen corresponding path program 2 times [2022-11-26 00:22:40,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:22:40,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389202432] [2022-11-26 00:22:40,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:22:40,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:22:40,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:22:40,662 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-26 00:22:40,664 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:22:40,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389202432] [2022-11-26 00:22:40,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389202432] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:22:40,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144867155] [2022-11-26 00:22:40,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:22:40,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:22:40,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3115c1f4-19cd-4af2-876e-1078da5a42ce/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:22:40,671 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3115c1f4-19cd-4af2-876e-1078da5a42ce/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:22:40,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3115c1f4-19cd-4af2-876e-1078da5a42ce/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-26 00:22:40,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-26 00:22:40,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:22:40,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-26 00:22:40,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:22:40,779 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-26 00:22:40,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:22:40,840 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-26 00:22:40,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144867155] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:22:40,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1983467965] [2022-11-26 00:22:40,845 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-26 00:22:40,846 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:22:40,846 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:22:40,846 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:22:40,847 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:22:41,143 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:22:41,350 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '331#(and (<= 6 |ULTIMATE.start_main_~b~0#1|) (<= 6 |ULTIMATE.start_main_~a~0#1|) (<= 6 |ULTIMATE.start_main_~c~0#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (or (not (= 6 |ULTIMATE.start_main_~a~0#1|)) (not (= 6 |ULTIMATE.start_main_~c~0#1|)) (not (= 6 |ULTIMATE.start_main_~b~0#1|))) (= |#NULL.base| 0))' at error location [2022-11-26 00:22:41,350 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:22:41,350 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:22:41,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2022-11-26 00:22:41,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066733121] [2022-11-26 00:22:41,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:22:41,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-26 00:22:41,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:22:41,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-26 00:22:41,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-11-26 00:22:41,352 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:22:41,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:22:41,576 INFO L93 Difference]: Finished difference Result 92 states and 117 transitions. [2022-11-26 00:22:41,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-26 00:22:41,577 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-26 00:22:41,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:22:41,579 INFO L225 Difference]: With dead ends: 92 [2022-11-26 00:22:41,580 INFO L226 Difference]: Without dead ends: 81 [2022-11-26 00:22:41,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=110, Invalid=310, Unknown=0, NotChecked=0, Total=420 [2022-11-26 00:22:41,582 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 28 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:22:41,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 6 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:22:41,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-11-26 00:22:41,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 61. [2022-11-26 00:22:41,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.2166666666666666) internal successors, (73), 60 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:22:41,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 73 transitions. [2022-11-26 00:22:41,611 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 73 transitions. Word has length 12 [2022-11-26 00:22:41,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:22:41,611 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 73 transitions. [2022-11-26 00:22:41,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:22:41,612 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 73 transitions. [2022-11-26 00:22:41,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-26 00:22:41,614 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:22:41,614 INFO L195 NwaCegarLoop]: trace histogram [32, 8, 8, 4, 4, 1, 1, 1, 1] [2022-11-26 00:22:41,626 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3115c1f4-19cd-4af2-876e-1078da5a42ce/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-26 00:22:41,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3115c1f4-19cd-4af2-876e-1078da5a42ce/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:22:41,821 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:22:41,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:22:41,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1676347524, now seen corresponding path program 3 times [2022-11-26 00:22:41,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:22:41,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043154657] [2022-11-26 00:22:41,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:22:41,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:22:41,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:22:42,008 INFO L134 CoverageAnalysis]: Checked inductivity of 856 backedges. 190 proven. 10 refuted. 0 times theorem prover too weak. 656 trivial. 0 not checked. [2022-11-26 00:22:42,009 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:22:42,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043154657] [2022-11-26 00:22:42,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043154657] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:22:42,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096164066] [2022-11-26 00:22:42,010 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:22:42,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:22:42,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3115c1f4-19cd-4af2-876e-1078da5a42ce/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:22:42,023 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3115c1f4-19cd-4af2-876e-1078da5a42ce/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:22:42,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3115c1f4-19cd-4af2-876e-1078da5a42ce/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-26 00:22:42,115 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:22:42,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:22:42,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-26 00:22:42,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:22:42,147 INFO L134 CoverageAnalysis]: Checked inductivity of 856 backedges. 190 proven. 10 refuted. 0 times theorem prover too weak. 656 trivial. 0 not checked. [2022-11-26 00:22:42,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:22:42,191 INFO L134 CoverageAnalysis]: Checked inductivity of 856 backedges. 190 proven. 10 refuted. 0 times theorem prover too weak. 656 trivial. 0 not checked. [2022-11-26 00:22:42,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096164066] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:22:42,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [165226950] [2022-11-26 00:22:42,195 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-26 00:22:42,196 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:22:42,196 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:22:42,196 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:22:42,196 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:22:42,401 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:22:42,596 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1010#(and (<= 6 |ULTIMATE.start_main_~b~0#1|) (<= 6 |ULTIMATE.start_main_~a~0#1|) (<= 6 |ULTIMATE.start_main_~c~0#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (or (not (= 6 |ULTIMATE.start_main_~a~0#1|)) (not (= 6 |ULTIMATE.start_main_~c~0#1|)) (not (= 6 |ULTIMATE.start_main_~b~0#1|))) (= |#NULL.base| 0))' at error location [2022-11-26 00:22:42,596 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:22:42,596 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:22:42,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2022-11-26 00:22:42,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787327041] [2022-11-26 00:22:42,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:22:42,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-26 00:22:42,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:22:42,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-26 00:22:42,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2022-11-26 00:22:42,599 INFO L87 Difference]: Start difference. First operand 61 states and 73 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:22:42,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:22:42,638 INFO L93 Difference]: Finished difference Result 130 states and 169 transitions. [2022-11-26 00:22:42,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-26 00:22:42,638 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 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 60 [2022-11-26 00:22:42,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:22:42,639 INFO L225 Difference]: With dead ends: 130 [2022-11-26 00:22:42,639 INFO L226 Difference]: Without dead ends: 77 [2022-11-26 00:22:42,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 169 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2022-11-26 00:22:42,641 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:22:42,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:22:42,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-11-26 00:22:42,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2022-11-26 00:22:42,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.1710526315789473) internal successors, (89), 76 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:22:42,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 89 transitions. [2022-11-26 00:22:42,654 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 89 transitions. Word has length 60 [2022-11-26 00:22:42,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:22:42,655 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 89 transitions. [2022-11-26 00:22:42,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:22:42,655 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 89 transitions. [2022-11-26 00:22:42,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-26 00:22:42,657 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:22:42,657 INFO L195 NwaCegarLoop]: trace histogram [48, 8, 8, 4, 4, 1, 1, 1, 1] [2022-11-26 00:22:42,663 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3115c1f4-19cd-4af2-876e-1078da5a42ce/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-26 00:22:42,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3115c1f4-19cd-4af2-876e-1078da5a42ce/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:22:42,864 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:22:42,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:22:42,864 INFO L85 PathProgramCache]: Analyzing trace with hash 987069308, now seen corresponding path program 4 times [2022-11-26 00:22:42,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:22:42,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139464788] [2022-11-26 00:22:42,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:22:42,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:22:42,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:22:43,059 INFO L134 CoverageAnalysis]: Checked inductivity of 1616 backedges. 619 proven. 52 refuted. 0 times theorem prover too weak. 945 trivial. 0 not checked. [2022-11-26 00:22:43,059 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:22:43,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139464788] [2022-11-26 00:22:43,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139464788] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:22:43,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395542188] [2022-11-26 00:22:43,060 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-26 00:22:43,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:22:43,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3115c1f4-19cd-4af2-876e-1078da5a42ce/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:22:43,066 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3115c1f4-19cd-4af2-876e-1078da5a42ce/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:22:43,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3115c1f4-19cd-4af2-876e-1078da5a42ce/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-26 00:22:43,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:22:43,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-26 00:22:43,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:22:43,193 INFO L134 CoverageAnalysis]: Checked inductivity of 1616 backedges. 619 proven. 52 refuted. 0 times theorem prover too weak. 945 trivial. 0 not checked. [2022-11-26 00:22:43,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:22:43,245 INFO L134 CoverageAnalysis]: Checked inductivity of 1616 backedges. 619 proven. 52 refuted. 0 times theorem prover too weak. 945 trivial. 0 not checked. [2022-11-26 00:22:43,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395542188] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:22:43,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1377007544] [2022-11-26 00:22:43,247 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-26 00:22:43,248 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:22:43,248 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:22:43,248 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:22:43,248 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:22:43,438 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:22:43,609 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1877#(and (<= 6 |ULTIMATE.start_main_~b~0#1|) (<= 6 |ULTIMATE.start_main_~a~0#1|) (<= 6 |ULTIMATE.start_main_~c~0#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (or (not (= 6 |ULTIMATE.start_main_~a~0#1|)) (not (= 6 |ULTIMATE.start_main_~c~0#1|)) (not (= 6 |ULTIMATE.start_main_~b~0#1|))) (= |#NULL.base| 0))' at error location [2022-11-26 00:22:43,609 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:22:43,610 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:22:43,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-11-26 00:22:43,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826607129] [2022-11-26 00:22:43,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:22:43,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-26 00:22:43,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:22:43,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-26 00:22:43,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2022-11-26 00:22:43,612 INFO L87 Difference]: Start difference. First operand 77 states and 89 transitions. Second operand has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:22:43,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:22:43,674 INFO L93 Difference]: Finished difference Result 263 states and 316 transitions. [2022-11-26 00:22:43,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-26 00:22:43,674 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2022-11-26 00:22:43,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:22:43,676 INFO L225 Difference]: With dead ends: 263 [2022-11-26 00:22:43,676 INFO L226 Difference]: Without dead ends: 205 [2022-11-26 00:22:43,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2022-11-26 00:22:43,677 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 4 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:22:43,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 6 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:22:43,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-11-26 00:22:43,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2022-11-26 00:22:43,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 1.142156862745098) internal successors, (233), 204 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:22:43,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 233 transitions. [2022-11-26 00:22:43,715 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 233 transitions. Word has length 76 [2022-11-26 00:22:43,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:22:43,715 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 233 transitions. [2022-11-26 00:22:43,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:22:43,716 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 233 transitions. [2022-11-26 00:22:43,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2022-11-26 00:22:43,718 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:22:43,719 INFO L195 NwaCegarLoop]: trace histogram [144, 24, 24, 4, 4, 1, 1, 1, 1] [2022-11-26 00:22:43,727 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3115c1f4-19cd-4af2-876e-1078da5a42ce/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-26 00:22:43,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3115c1f4-19cd-4af2-876e-1078da5a42ce/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:22:43,924 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:22:43,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:22:43,925 INFO L85 PathProgramCache]: Analyzing trace with hash 1802875388, now seen corresponding path program 5 times [2022-11-26 00:22:43,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:22:43,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563109892] [2022-11-26 00:22:43,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:22:43,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:22:44,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:22:44,314 INFO L134 CoverageAnalysis]: Checked inductivity of 14416 backedges. 0 proven. 10888 refuted. 0 times theorem prover too weak. 3528 trivial. 0 not checked. [2022-11-26 00:22:44,315 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:22:44,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563109892] [2022-11-26 00:22:44,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563109892] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:22:44,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642239157] [2022-11-26 00:22:44,315 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:22:44,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:22:44,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3115c1f4-19cd-4af2-876e-1078da5a42ce/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:22:44,317 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3115c1f4-19cd-4af2-876e-1078da5a42ce/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:22:44,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3115c1f4-19cd-4af2-876e-1078da5a42ce/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-26 00:22:44,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 51 check-sat command(s) [2022-11-26 00:22:44,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:22:44,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-26 00:22:44,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:22:45,021 INFO L134 CoverageAnalysis]: Checked inductivity of 14416 backedges. 5443 proven. 777 refuted. 0 times theorem prover too weak. 8196 trivial. 0 not checked. [2022-11-26 00:22:45,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:22:46,026 INFO L134 CoverageAnalysis]: Checked inductivity of 14416 backedges. 5443 proven. 777 refuted. 0 times theorem prover too weak. 8196 trivial. 0 not checked. [2022-11-26 00:22:46,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642239157] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:22:46,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [575855720] [2022-11-26 00:22:46,030 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-26 00:22:46,031 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:22:46,031 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:22:46,031 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:22:46,031 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:22:46,235 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:22:46,521 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4063#(and (<= 6 |ULTIMATE.start_main_~b~0#1|) (<= 6 |ULTIMATE.start_main_~a~0#1|) (<= 6 |ULTIMATE.start_main_~c~0#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (or (not (= 6 |ULTIMATE.start_main_~a~0#1|)) (not (= 6 |ULTIMATE.start_main_~c~0#1|)) (not (= 6 |ULTIMATE.start_main_~b~0#1|))) (= |#NULL.base| 0))' at error location [2022-11-26 00:22:46,522 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:22:46,522 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:22:46,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 18, 18] total 38 [2022-11-26 00:22:46,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411750998] [2022-11-26 00:22:46,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:22:46,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-26 00:22:46,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:22:46,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-26 00:22:46,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=1561, Unknown=0, NotChecked=0, Total=1806 [2022-11-26 00:22:46,526 INFO L87 Difference]: Start difference. First operand 205 states and 233 transitions. Second operand has 38 states, 38 states have (on average 2.1842105263157894) internal successors, (83), 38 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:22:48,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:22:48,916 INFO L93 Difference]: Finished difference Result 465 states and 533 transitions. [2022-11-26 00:22:48,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-11-26 00:22:48,917 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1842105263157894) internal successors, (83), 38 states have internal predecessors, (83), 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 204 [2022-11-26 00:22:48,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:22:48,918 INFO L225 Difference]: With dead ends: 465 [2022-11-26 00:22:48,918 INFO L226 Difference]: Without dead ends: 0 [2022-11-26 00:22:48,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 686 GetRequests, 574 SyntacticMatches, 1 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3353 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2000, Invalid=10656, Unknown=0, NotChecked=0, Total=12656 [2022-11-26 00:22:48,924 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 76 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 775 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-26 00:22:48,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 0 Invalid, 865 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 775 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-26 00:22:48,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-26 00:22:48,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-26 00:22:48,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:22:48,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-26 00:22:48,926 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 204 [2022-11-26 00:22:48,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:22:48,926 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-26 00:22:48,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.1842105263157894) internal successors, (83), 38 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:22:48,927 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-26 00:22:48,927 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-26 00:22:48,929 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-26 00:22:48,948 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3115c1f4-19cd-4af2-876e-1078da5a42ce/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-26 00:22:49,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3115c1f4-19cd-4af2-876e-1078da5a42ce/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-26 00:22:49,137 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-11-26 00:22:55,105 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-11-26 00:22:55,105 INFO L899 garLoopResultBuilder]: For program point L29(line 29) no Hoare annotation was computed. [2022-11-26 00:22:55,106 INFO L895 garLoopResultBuilder]: At program point L23-3(lines 23 25) the Hoare annotation is: (let ((.cse0 (< |ULTIMATE.start_main_~a~0#1| 6)) (.cse1 (= 5 |ULTIMATE.start_main_~b~0#1|))) (or (and .cse0 (= 2 |ULTIMATE.start_main_~b~0#1|)) (and .cse0 .cse1 (= 2 |ULTIMATE.start_main_~c~0#1|)) (and (= |ULTIMATE.start_main_~b~0#1| 1) .cse0) (and .cse0 .cse1 (= 3 |ULTIMATE.start_main_~c~0#1|)) (and .cse0 .cse1 (= 6 |ULTIMATE.start_main_~c~0#1|)) (and .cse0 .cse1 (= |ULTIMATE.start_main_~c~0#1| 4)) (and (= |ULTIMATE.start_main_~b~0#1| 0) .cse0) (and .cse0 (= 5 |ULTIMATE.start_main_~c~0#1|) .cse1) (and (= |ULTIMATE.start_main_~b~0#1| 4) .cse0) (and .cse0 (= 3 |ULTIMATE.start_main_~b~0#1|)) (and (= |ULTIMATE.start_main_~c~0#1| 1) .cse0 .cse1) (and (= |ULTIMATE.start_main_~c~0#1| 0) .cse0 .cse1))) [2022-11-26 00:22:55,106 INFO L895 garLoopResultBuilder]: At program point L21-3(lines 21 27) the Hoare annotation is: (and (<= |ULTIMATE.start_main_~a~0#1| 6) (= 6 |ULTIMATE.start_main_~b~0#1|) (= 6 |ULTIMATE.start_main_~c~0#1|)) [2022-11-26 00:22:55,106 INFO L899 garLoopResultBuilder]: For program point L21-4(lines 15 32) no Hoare annotation was computed. [2022-11-26 00:22:55,107 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2022-11-26 00:22:55,107 INFO L902 garLoopResultBuilder]: At program point L28-1(lines 28 30) the Hoare annotation is: true [2022-11-26 00:22:55,107 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 29) no Hoare annotation was computed. [2022-11-26 00:22:55,111 INFO L895 garLoopResultBuilder]: At program point L22-3(lines 22 26) the Hoare annotation is: (let ((.cse0 (< |ULTIMATE.start_main_~a~0#1| 6))) (or (and .cse0 (= 2 |ULTIMATE.start_main_~b~0#1|)) (and (= |ULTIMATE.start_main_~b~0#1| 1) .cse0) (and (= |ULTIMATE.start_main_~b~0#1| 0) .cse0) (and .cse0 (= 6 |ULTIMATE.start_main_~b~0#1|) (= 6 |ULTIMATE.start_main_~c~0#1|)) (and (= |ULTIMATE.start_main_~b~0#1| 4) .cse0) (and .cse0 (= 3 |ULTIMATE.start_main_~b~0#1|)) (and .cse0 (= 5 |ULTIMATE.start_main_~b~0#1|)))) [2022-11-26 00:22:55,115 INFO L445 BasicCegarLoop]: Path program histogram: [5, 1, 1, 1] [2022-11-26 00:22:55,117 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-26 00:22:55,134 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.11 12:22:55 BoogieIcfgContainer [2022-11-26 00:22:55,135 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-26 00:22:55,135 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-26 00:22:55,136 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-26 00:22:55,136 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-26 00:22:55,137 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:22:38" (3/4) ... [2022-11-26 00:22:55,140 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-11-26 00:22:55,150 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2022-11-26 00:22:55,151 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2022-11-26 00:22:55,151 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2022-11-26 00:22:55,151 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-11-26 00:22:55,185 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3115c1f4-19cd-4af2-876e-1078da5a42ce/bin/utaipan-ByfvJB40ur/witness.graphml [2022-11-26 00:22:55,186 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-26 00:22:55,186 INFO L158 Benchmark]: Toolchain (without parser) took 17476.00ms. Allocated memory was 144.7MB in the beginning and 325.1MB in the end (delta: 180.4MB). Free memory was 113.5MB in the beginning and 240.3MB in the end (delta: -126.8MB). Peak memory consumption was 56.4MB. Max. memory is 16.1GB. [2022-11-26 00:22:55,187 INFO L158 Benchmark]: CDTParser took 0.32ms. Allocated memory is still 144.7MB. Free memory is still 113.7MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-26 00:22:55,187 INFO L158 Benchmark]: CACSL2BoogieTranslator took 272.79ms. Allocated memory is still 144.7MB. Free memory was 113.5MB in the beginning and 103.3MB in the end (delta: 10.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-26 00:22:55,188 INFO L158 Benchmark]: Boogie Procedure Inliner took 33.54ms. Allocated memory is still 144.7MB. Free memory was 103.3MB in the beginning and 101.7MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-26 00:22:55,188 INFO L158 Benchmark]: Boogie Preprocessor took 44.87ms. Allocated memory is still 144.7MB. Free memory was 101.7MB in the beginning and 100.6MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-26 00:22:55,188 INFO L158 Benchmark]: RCFGBuilder took 286.93ms. Allocated memory is still 144.7MB. Free memory was 100.6MB in the beginning and 90.2MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-26 00:22:55,189 INFO L158 Benchmark]: TraceAbstraction took 16777.98ms. Allocated memory was 144.7MB in the beginning and 325.1MB in the end (delta: 180.4MB). Free memory was 89.6MB in the beginning and 242.4MB in the end (delta: -152.8MB). Peak memory consumption was 138.2MB. Max. memory is 16.1GB. [2022-11-26 00:22:55,190 INFO L158 Benchmark]: Witness Printer took 50.26ms. Allocated memory is still 325.1MB. Free memory was 242.4MB in the beginning and 240.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-26 00:22:55,193 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32ms. Allocated memory is still 144.7MB. Free memory is still 113.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 272.79ms. Allocated memory is still 144.7MB. Free memory was 113.5MB in the beginning and 103.3MB in the end (delta: 10.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 33.54ms. Allocated memory is still 144.7MB. Free memory was 103.3MB in the beginning and 101.7MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 44.87ms. Allocated memory is still 144.7MB. Free memory was 101.7MB in the beginning and 100.6MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 286.93ms. Allocated memory is still 144.7MB. Free memory was 100.6MB in the beginning and 90.2MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 16777.98ms. Allocated memory was 144.7MB in the beginning and 325.1MB in the end (delta: 180.4MB). Free memory was 89.6MB in the beginning and 242.4MB in the end (delta: -152.8MB). Peak memory consumption was 138.2MB. Max. memory is 16.1GB. * Witness Printer took 50.26ms. Allocated memory is still 325.1MB. Free memory was 242.4MB in the beginning and 240.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 29]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 9 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 16.7s, OverallIterations: 8, TraceHistogramMax: 144, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.0s, AutomataDifference: 3.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 6.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 114 SdHoareTripleChecker+Valid, 0.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 114 mSDsluCounter, 48 SdHoareTripleChecker+Invalid, 0.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 24 mSDsCounter, 95 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 938 IncrementalHoareTripleChecker+Invalid, 1033 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 95 mSolverCounterUnsat, 24 mSDtfsCounter, 938 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1188 GetRequests, 1016 SyntacticMatches, 5 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3581 ImplicationChecksByTransitivity, 3.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=205occurred in iteration=7, InterpolantAutomatonStates: 133, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 23 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 4 LocationsWithAnnotation, 4 PreInvPairs, 306 NumberOfFragments, 170 HoareAnnotationTreeSize, 4 FomulaSimplifications, 2013 FormulaSimplificationTreeSizeReduction, 3.1s HoareSimplificationTime, 4 FomulaSimplificationsInter, 4806 FormulaSimplificationTreeSizeReductionInter, 2.8s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 2.8s InterpolantComputationTime, 740 NumberOfCodeBlocks, 633 NumberOfCodeBlocksAsserted, 64 NumberOfCheckSat, 1083 ConstructedInterpolants, 0 QuantifiedInterpolants, 2597 SizeOfPredicates, 3 NumberOfNonLiveVariables, 846 ConjunctsInSsa, 48 ConjunctsInUnsatCore, 18 InterpolantComputations, 3 PerfectInterpolantSequences, 38078/50712 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 21]: Loop Invariant Derived loop invariant: (a <= 6 && 6 == b) && 6 == c - InvariantResult [Line: 28]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 23]: Loop Invariant Derived loop invariant: (((((((((((a < 6 && 2 == b) || ((a < 6 && 5 == b) && 2 == c)) || (b == 1 && a < 6)) || ((a < 6 && 5 == b) && 3 == c)) || ((a < 6 && 5 == b) && 6 == c)) || ((a < 6 && 5 == b) && c == 4)) || (b == 0 && a < 6)) || ((a < 6 && 5 == c) && 5 == b)) || (b == 4 && a < 6)) || (a < 6 && 3 == b)) || ((c == 1 && a < 6) && 5 == b)) || ((c == 0 && a < 6) && 5 == b) - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: ((((((a < 6 && 2 == b) || (b == 1 && a < 6)) || (b == 0 && a < 6)) || ((a < 6 && 6 == b) && 6 == c)) || (b == 4 && a < 6)) || (a < 6 && 3 == b)) || (a < 6 && 5 == b) RESULT: Ultimate proved your program to be correct! [2022-11-26 00:22:55,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3115c1f4-19cd-4af2-876e-1078da5a42ce/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE