./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-benchs/rlim_exit.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe36827-73ec-42a8-9df8-fb8bc1fa606e/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe36827-73ec-42a8-9df8-fb8bc1fa606e/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe36827-73ec-42a8-9df8-fb8bc1fa606e/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe36827-73ec-42a8-9df8-fb8bc1fa606e/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/rlim_exit.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe36827-73ec-42a8-9df8-fb8bc1fa606e/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe36827-73ec-42a8-9df8-fb8bc1fa606e/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d77357c243d95f35d00bc89e7fc23b91d82935f320cfab6cb2f6a7d192f5b03f --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 10:19:40,794 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 10:19:40,796 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 10:19:40,814 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 10:19:40,814 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 10:19:40,815 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 10:19:40,816 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 10:19:40,818 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 10:19:40,819 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 10:19:40,820 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 10:19:40,821 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 10:19:40,822 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 10:19:40,822 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 10:19:40,823 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 10:19:40,825 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 10:19:40,826 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 10:19:40,826 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 10:19:40,827 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 10:19:40,829 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 10:19:40,831 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 10:19:40,832 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 10:19:40,833 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 10:19:40,834 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 10:19:40,835 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 10:19:40,839 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 10:19:40,839 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 10:19:40,839 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 10:19:40,840 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 10:19:40,840 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 10:19:40,841 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 10:19:40,841 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 10:19:40,842 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 10:19:40,843 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 10:19:40,843 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 10:19:40,844 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 10:19:40,844 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 10:19:40,845 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 10:19:40,845 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 10:19:40,845 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 10:19:40,846 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 10:19:40,847 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 10:19:40,847 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe36827-73ec-42a8-9df8-fb8bc1fa606e/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 10:19:40,867 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 10:19:40,867 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 10:19:40,868 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 10:19:40,868 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 10:19:40,868 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 10:19:40,868 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 10:19:40,869 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 10:19:40,869 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 10:19:40,869 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 10:19:40,869 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 10:19:40,869 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 10:19:40,870 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 10:19:40,870 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 10:19:40,870 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 10:19:40,870 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 10:19:40,870 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 10:19:40,870 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 10:19:40,871 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 10:19:40,871 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 10:19:40,871 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 10:19:40,872 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 10:19:40,872 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 10:19:40,872 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 10:19:40,872 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 10:19:40,872 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 10:19:40,872 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 10:19:40,873 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 10:19:40,873 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 10:19:40,873 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 10:19:40,873 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 10:19:40,873 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 10:19:40,873 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 10:19:40,874 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 10:19:40,874 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 10:19:40,874 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 10:19:40,874 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 10:19:40,874 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 10:19:40,874 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 10:19:40,875 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 10:19:40,875 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 10:19:40,875 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 10:19:40,875 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_1fe36827-73ec-42a8-9df8-fb8bc1fa606e/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe36827-73ec-42a8-9df8-fb8bc1fa606e/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d77357c243d95f35d00bc89e7fc23b91d82935f320cfab6cb2f6a7d192f5b03f [2022-12-14 10:19:41,081 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 10:19:41,100 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 10:19:41,101 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 10:19:41,102 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 10:19:41,102 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 10:19:41,103 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe36827-73ec-42a8-9df8-fb8bc1fa606e/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/float-benchs/rlim_exit.c [2022-12-14 10:19:43,739 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 10:19:43,859 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 10:19:43,859 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe36827-73ec-42a8-9df8-fb8bc1fa606e/sv-benchmarks/c/float-benchs/rlim_exit.c [2022-12-14 10:19:43,864 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe36827-73ec-42a8-9df8-fb8bc1fa606e/bin/utaipan-gh47qXpMRh/data/376ee517f/436aadab0ced4bf585c180769a0e0530/FLAG2e4da9699 [2022-12-14 10:19:43,874 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe36827-73ec-42a8-9df8-fb8bc1fa606e/bin/utaipan-gh47qXpMRh/data/376ee517f/436aadab0ced4bf585c180769a0e0530 [2022-12-14 10:19:43,875 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 10:19:43,876 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 10:19:43,877 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 10:19:43,877 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 10:19:43,880 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 10:19:43,881 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 10:19:43" (1/1) ... [2022-12-14 10:19:43,881 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68819988 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:19:43, skipping insertion in model container [2022-12-14 10:19:43,882 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 10:19:43" (1/1) ... [2022-12-14 10:19:43,887 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 10:19:43,898 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 10:19:44,002 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_1fe36827-73ec-42a8-9df8-fb8bc1fa606e/sv-benchmarks/c/float-benchs/rlim_exit.c[446,459] [2022-12-14 10:19:44,013 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 10:19:44,020 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 10:19:44,029 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_1fe36827-73ec-42a8-9df8-fb8bc1fa606e/sv-benchmarks/c/float-benchs/rlim_exit.c[446,459] [2022-12-14 10:19:44,032 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 10:19:44,042 INFO L208 MainTranslator]: Completed translation [2022-12-14 10:19:44,042 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:19:44 WrapperNode [2022-12-14 10:19:44,042 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 10:19:44,043 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 10:19:44,043 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 10:19:44,043 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 10:19:44,049 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:19:44" (1/1) ... [2022-12-14 10:19:44,054 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:19:44" (1/1) ... [2022-12-14 10:19:44,066 INFO L138 Inliner]: procedures = 14, calls = 10, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 47 [2022-12-14 10:19:44,067 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 10:19:44,067 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 10:19:44,067 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 10:19:44,067 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 10:19:44,074 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:19:44" (1/1) ... [2022-12-14 10:19:44,074 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:19:44" (1/1) ... [2022-12-14 10:19:44,075 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:19:44" (1/1) ... [2022-12-14 10:19:44,075 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:19:44" (1/1) ... [2022-12-14 10:19:44,078 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:19:44" (1/1) ... [2022-12-14 10:19:44,080 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:19:44" (1/1) ... [2022-12-14 10:19:44,081 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:19:44" (1/1) ... [2022-12-14 10:19:44,081 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:19:44" (1/1) ... [2022-12-14 10:19:44,082 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 10:19:44,083 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 10:19:44,083 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 10:19:44,084 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 10:19:44,084 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:19:44" (1/1) ... [2022-12-14 10:19:44,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 10:19:44,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe36827-73ec-42a8-9df8-fb8bc1fa606e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:19:44,107 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe36827-73ec-42a8-9df8-fb8bc1fa606e/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 10:19:44,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe36827-73ec-42a8-9df8-fb8bc1fa606e/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 10:19:44,134 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 10:19:44,134 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-12-14 10:19:44,134 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-12-14 10:19:44,134 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 10:19:44,135 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 10:19:44,135 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 10:19:44,187 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 10:19:44,188 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 10:19:44,284 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 10:19:44,314 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 10:19:44,314 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 10:19:44,316 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 10:19:44 BoogieIcfgContainer [2022-12-14 10:19:44,316 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 10:19:44,319 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 10:19:44,319 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 10:19:44,322 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 10:19:44,323 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 10:19:43" (1/3) ... [2022-12-14 10:19:44,323 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7602be87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 10:19:44, skipping insertion in model container [2022-12-14 10:19:44,323 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:19:44" (2/3) ... [2022-12-14 10:19:44,324 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7602be87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 10:19:44, skipping insertion in model container [2022-12-14 10:19:44,324 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 10:19:44" (3/3) ... [2022-12-14 10:19:44,325 INFO L112 eAbstractionObserver]: Analyzing ICFG rlim_exit.c [2022-12-14 10:19:44,344 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 10:19:44,345 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 10:19:44,382 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 10:19:44,387 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;@4a4a5432, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 10:19:44,387 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 10:19:44,390 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 8 states have internal predecessors, (10), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 10:19:44,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-12-14 10:19:44,395 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:19:44,395 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-12-14 10:19:44,396 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:19:44,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:19:44,400 INFO L85 PathProgramCache]: Analyzing trace with hash 2680294, now seen corresponding path program 1 times [2022-12-14 10:19:44,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:19:44,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891374510] [2022-12-14 10:19:44,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:19:44,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:19:44,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:19:44,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:19:44,541 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:19:44,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891374510] [2022-12-14 10:19:44,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891374510] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:19:44,542 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:19:44,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 10:19:44,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113488876] [2022-12-14 10:19:44,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:19:44,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:19:44,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:19:44,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:19:44,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:19:44,574 INFO L87 Difference]: Start difference. First operand has 12 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 8 states have internal predecessors, (10), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:19:44,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:19:44,609 INFO L93 Difference]: Finished difference Result 21 states and 26 transitions. [2022-12-14 10:19:44,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:19:44,611 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-12-14 10:19:44,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:19:44,616 INFO L225 Difference]: With dead ends: 21 [2022-12-14 10:19:44,616 INFO L226 Difference]: Without dead ends: 14 [2022-12-14 10:19:44,617 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:19:44,620 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 1 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 16 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 [2022-12-14 10:19:44,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 16 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:19:44,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-12-14 10:19:44,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 11. [2022-12-14 10:19:44,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 10:19:44,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2022-12-14 10:19:44,645 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 4 [2022-12-14 10:19:44,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:19:44,645 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2022-12-14 10:19:44,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:19:44,646 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2022-12-14 10:19:44,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 10:19:44,646 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:19:44,647 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:19:44,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 10:19:44,647 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:19:44,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:19:44,648 INFO L85 PathProgramCache]: Analyzing trace with hash -695491792, now seen corresponding path program 1 times [2022-12-14 10:19:44,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:19:44,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746534970] [2022-12-14 10:19:44,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:19:44,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:19:44,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:19:44,730 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 10:19:44,730 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:19:44,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746534970] [2022-12-14 10:19:44,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746534970] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:19:44,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365134676] [2022-12-14 10:19:44,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:19:44,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:19:44,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe36827-73ec-42a8-9df8-fb8bc1fa606e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:19:44,733 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe36827-73ec-42a8-9df8-fb8bc1fa606e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:19:44,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe36827-73ec-42a8-9df8-fb8bc1fa606e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 10:19:44,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:19:44,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 10:19:44,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:19:44,822 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 10:19:44,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:19:44,852 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 10:19:44,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365134676] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:19:44,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1653688043] [2022-12-14 10:19:44,870 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 10:19:44,871 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:19:44,873 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:19:44,876 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:19:44,877 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:19:45,471 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-12-14 10:19:45,472 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:19:45,734 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '137#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 10:19:45,734 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:19:45,734 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:19:45,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-12-14 10:19:45,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293145391] [2022-12-14 10:19:45,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:19:45,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 10:19:45,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:19:45,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 10:19:45,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-12-14 10:19:45,738 INFO L87 Difference]: Start difference. First operand 11 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), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-12-14 10:19:45,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:19:45,774 INFO L93 Difference]: Finished difference Result 26 states and 35 transitions. [2022-12-14 10:19:45,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 10:19:45,774 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), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 12 [2022-12-14 10:19:45,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:19:45,775 INFO L225 Difference]: With dead ends: 26 [2022-12-14 10:19:45,775 INFO L226 Difference]: Without dead ends: 23 [2022-12-14 10:19:45,776 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-12-14 10:19:45,777 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 2 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:19:45,777 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 20 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:19:45,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-12-14 10:19:45,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-12-14 10:19:45,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 13 states have internal predecessors, (14), 8 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-14 10:19:45,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 30 transitions. [2022-12-14 10:19:45,783 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 30 transitions. Word has length 12 [2022-12-14 10:19:45,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:19:45,783 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 30 transitions. [2022-12-14 10:19:45,783 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), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-12-14 10:19:45,784 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 30 transitions. [2022-12-14 10:19:45,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-12-14 10:19:45,784 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:19:45,785 INFO L195 NwaCegarLoop]: trace histogram [8, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1] [2022-12-14 10:19:45,790 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe36827-73ec-42a8-9df8-fb8bc1fa606e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 10:19:45,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe36827-73ec-42a8-9df8-fb8bc1fa606e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:19:45,985 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:19:45,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:19:45,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1212047118, now seen corresponding path program 2 times [2022-12-14 10:19:45,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:19:45,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528825129] [2022-12-14 10:19:45,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:19:45,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:19:46,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:19:46,140 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-12-14 10:19:46,140 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:19:46,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528825129] [2022-12-14 10:19:46,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528825129] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:19:46,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066839410] [2022-12-14 10:19:46,141 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 10:19:46,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:19:46,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe36827-73ec-42a8-9df8-fb8bc1fa606e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:19:46,142 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe36827-73ec-42a8-9df8-fb8bc1fa606e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:19:46,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe36827-73ec-42a8-9df8-fb8bc1fa606e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 10:19:46,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-12-14 10:19:46,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:19:46,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 10:19:46,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:19:46,238 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-12-14 10:19:46,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:19:46,300 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-12-14 10:19:46,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066839410] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:19:46,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1433649767] [2022-12-14 10:19:46,302 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 10:19:46,303 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:19:46,303 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:19:46,303 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:19:46,303 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:19:46,616 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-12-14 10:19:46,616 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:19:46,837 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '445#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 10:19:46,837 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:19:46,837 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:19:46,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-12-14 10:19:46,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650233188] [2022-12-14 10:19:46,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:19:46,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 10:19:46,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:19:46,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 10:19:46,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2022-12-14 10:19:46,840 INFO L87 Difference]: Start difference. First operand 23 states and 30 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 9 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 9 states have call predecessors, (18), 9 states have call successors, (18) [2022-12-14 10:19:46,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:19:46,914 INFO L93 Difference]: Finished difference Result 50 states and 74 transitions. [2022-12-14 10:19:46,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 10:19:46,914 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 9 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 9 states have call predecessors, (18), 9 states have call successors, (18) Word has length 36 [2022-12-14 10:19:46,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:19:46,915 INFO L225 Difference]: With dead ends: 50 [2022-12-14 10:19:46,915 INFO L226 Difference]: Without dead ends: 47 [2022-12-14 10:19:46,916 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2022-12-14 10:19:46,917 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 2 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:19:46,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 44 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:19:46,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-12-14 10:19:46,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-12-14 10:19:46,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 25 states have (on average 1.04) internal successors, (26), 25 states have internal predecessors, (26), 20 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-12-14 10:19:46,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 66 transitions. [2022-12-14 10:19:46,926 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 66 transitions. Word has length 36 [2022-12-14 10:19:46,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:19:46,927 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 66 transitions. [2022-12-14 10:19:46,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 9 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 9 states have call predecessors, (18), 9 states have call successors, (18) [2022-12-14 10:19:46,927 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 66 transitions. [2022-12-14 10:19:46,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-12-14 10:19:46,929 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:19:46,929 INFO L195 NwaCegarLoop]: trace histogram [20, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1] [2022-12-14 10:19:46,934 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe36827-73ec-42a8-9df8-fb8bc1fa606e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 10:19:47,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe36827-73ec-42a8-9df8-fb8bc1fa606e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:19:47,131 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:19:47,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:19:47,132 INFO L85 PathProgramCache]: Analyzing trace with hash -795399990, now seen corresponding path program 3 times [2022-12-14 10:19:47,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:19:47,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020998474] [2022-12-14 10:19:47,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:19:47,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:19:47,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:19:47,501 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2022-12-14 10:19:47,501 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:19:47,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020998474] [2022-12-14 10:19:47,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020998474] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:19:47,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023787089] [2022-12-14 10:19:47,502 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 10:19:47,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:19:47,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe36827-73ec-42a8-9df8-fb8bc1fa606e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:19:47,503 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe36827-73ec-42a8-9df8-fb8bc1fa606e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:19:47,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe36827-73ec-42a8-9df8-fb8bc1fa606e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 10:19:47,579 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 10:19:47,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:19:47,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 10:19:47,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:19:47,642 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2022-12-14 10:19:47,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:19:47,860 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2022-12-14 10:19:47,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023787089] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:19:47,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1196446257] [2022-12-14 10:19:47,862 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 10:19:47,863 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:19:47,863 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:19:47,863 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:19:47,863 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:19:48,214 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-12-14 10:19:48,215 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:19:48,430 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1137#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 10:19:48,430 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:19:48,430 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:19:48,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2022-12-14 10:19:48,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301278992] [2022-12-14 10:19:48,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:19:48,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-14 10:19:48,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:19:48,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-14 10:19:48,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=334, Invalid=722, Unknown=0, NotChecked=0, Total=1056 [2022-12-14 10:19:48,432 INFO L87 Difference]: Start difference. First operand 47 states and 66 transitions. Second operand has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 21 states have call successors, (42), 1 states have call predecessors, (42), 1 states have return successors, (42), 21 states have call predecessors, (42), 21 states have call successors, (42) [2022-12-14 10:19:48,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:19:48,557 INFO L93 Difference]: Finished difference Result 98 states and 152 transitions. [2022-12-14 10:19:48,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-14 10:19:48,557 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 21 states have call successors, (42), 1 states have call predecessors, (42), 1 states have return successors, (42), 21 states have call predecessors, (42), 21 states have call successors, (42) Word has length 84 [2022-12-14 10:19:48,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:19:48,559 INFO L225 Difference]: With dead ends: 98 [2022-12-14 10:19:48,559 INFO L226 Difference]: Without dead ends: 95 [2022-12-14 10:19:48,559 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=334, Invalid=722, Unknown=0, NotChecked=0, Total=1056 [2022-12-14 10:19:48,560 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 2 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:19:48,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 80 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:19:48,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-12-14 10:19:48,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2022-12-14 10:19:48,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 49 states have (on average 1.0204081632653061) internal successors, (50), 49 states have internal predecessors, (50), 44 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2022-12-14 10:19:48,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 138 transitions. [2022-12-14 10:19:48,570 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 138 transitions. Word has length 84 [2022-12-14 10:19:48,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:19:48,570 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 138 transitions. [2022-12-14 10:19:48,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 21 states have call successors, (42), 1 states have call predecessors, (42), 1 states have return successors, (42), 21 states have call predecessors, (42), 21 states have call successors, (42) [2022-12-14 10:19:48,571 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 138 transitions. [2022-12-14 10:19:48,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2022-12-14 10:19:48,573 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:19:48,573 INFO L195 NwaCegarLoop]: trace histogram [44, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1] [2022-12-14 10:19:48,579 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe36827-73ec-42a8-9df8-fb8bc1fa606e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 10:19:48,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe36827-73ec-42a8-9df8-fb8bc1fa606e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:19:48,774 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:19:48,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:19:48,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1184760898, now seen corresponding path program 4 times [2022-12-14 10:19:48,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:19:48,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059538501] [2022-12-14 10:19:48,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:19:48,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:19:48,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:19:49,463 INFO L134 CoverageAnalysis]: Checked inductivity of 2838 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 1892 trivial. 0 not checked. [2022-12-14 10:19:49,464 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:19:49,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059538501] [2022-12-14 10:19:49,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059538501] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:19:49,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914290167] [2022-12-14 10:19:49,464 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 10:19:49,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:19:49,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe36827-73ec-42a8-9df8-fb8bc1fa606e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:19:49,465 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe36827-73ec-42a8-9df8-fb8bc1fa606e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:19:49,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe36827-73ec-42a8-9df8-fb8bc1fa606e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 10:19:49,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:19:49,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 607 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 10:19:49,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:19:49,730 INFO L134 CoverageAnalysis]: Checked inductivity of 2838 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 1892 trivial. 0 not checked. [2022-12-14 10:19:49,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:19:50,274 INFO L134 CoverageAnalysis]: Checked inductivity of 2838 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 1892 trivial. 0 not checked. [2022-12-14 10:19:50,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914290167] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:19:50,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1519523372] [2022-12-14 10:19:50,276 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 10:19:50,276 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:19:50,276 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:19:50,276 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:19:50,276 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:19:50,524 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-12-14 10:19:50,525 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:19:50,756 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2597#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 10:19:50,757 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:19:50,757 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:19:50,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2022-12-14 10:19:50,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117342287] [2022-12-14 10:19:50,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:19:50,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-12-14 10:19:50,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:19:50,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-12-14 10:19:50,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1210, Invalid=1982, Unknown=0, NotChecked=0, Total=3192 [2022-12-14 10:19:50,761 INFO L87 Difference]: Start difference. First operand 95 states and 138 transitions. Second operand has 49 states, 49 states have (on average 2.0) internal successors, (98), 49 states have internal predecessors, (98), 45 states have call successors, (90), 1 states have call predecessors, (90), 1 states have return successors, (90), 45 states have call predecessors, (90), 45 states have call successors, (90) [2022-12-14 10:19:51,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:19:51,038 INFO L93 Difference]: Finished difference Result 194 states and 308 transitions. [2022-12-14 10:19:51,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-12-14 10:19:51,039 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.0) internal successors, (98), 49 states have internal predecessors, (98), 45 states have call successors, (90), 1 states have call predecessors, (90), 1 states have return successors, (90), 45 states have call predecessors, (90), 45 states have call successors, (90) Word has length 180 [2022-12-14 10:19:51,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:19:51,043 INFO L225 Difference]: With dead ends: 194 [2022-12-14 10:19:51,043 INFO L226 Difference]: Without dead ends: 191 [2022-12-14 10:19:51,044 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 563 GetRequests, 508 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 656 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1210, Invalid=1982, Unknown=0, NotChecked=0, Total=3192 [2022-12-14 10:19:51,044 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 2 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 10:19:51,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 108 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 10:19:51,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-12-14 10:19:51,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2022-12-14 10:19:51,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 97 states have (on average 1.0103092783505154) internal successors, (98), 97 states have internal predecessors, (98), 92 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 92 states have call predecessors, (92), 92 states have call successors, (92) [2022-12-14 10:19:51,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 282 transitions. [2022-12-14 10:19:51,063 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 282 transitions. Word has length 180 [2022-12-14 10:19:51,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:19:51,063 INFO L495 AbstractCegarLoop]: Abstraction has 191 states and 282 transitions. [2022-12-14 10:19:51,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.0) internal successors, (98), 49 states have internal predecessors, (98), 45 states have call successors, (90), 1 states have call predecessors, (90), 1 states have return successors, (90), 45 states have call predecessors, (90), 45 states have call successors, (90) [2022-12-14 10:19:51,064 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 282 transitions. [2022-12-14 10:19:51,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 373 [2022-12-14 10:19:51,068 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:19:51,069 INFO L195 NwaCegarLoop]: trace histogram [92, 46, 46, 46, 46, 46, 46, 1, 1, 1, 1] [2022-12-14 10:19:51,074 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe36827-73ec-42a8-9df8-fb8bc1fa606e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 10:19:51,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe36827-73ec-42a8-9df8-fb8bc1fa606e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:19:51,270 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:19:51,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:19:51,271 INFO L85 PathProgramCache]: Analyzing trace with hash -2076124366, now seen corresponding path program 5 times [2022-12-14 10:19:51,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:19:51,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052790696] [2022-12-14 10:19:51,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:19:51,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:19:51,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:19:53,276 INFO L134 CoverageAnalysis]: Checked inductivity of 12558 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 8372 trivial. 0 not checked. [2022-12-14 10:19:53,276 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:19:53,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052790696] [2022-12-14 10:19:53,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052790696] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:19:53,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035246369] [2022-12-14 10:19:53,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 10:19:53,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:19:53,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe36827-73ec-42a8-9df8-fb8bc1fa606e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:19:53,278 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe36827-73ec-42a8-9df8-fb8bc1fa606e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:19:53,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe36827-73ec-42a8-9df8-fb8bc1fa606e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 10:19:53,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 63 check-sat command(s) [2022-12-14 10:19:53,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:19:53,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 1231 conjuncts, 48 conjunts are in the unsatisfiable core [2022-12-14 10:19:53,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:19:53,951 INFO L134 CoverageAnalysis]: Checked inductivity of 12558 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 8372 trivial. 0 not checked. [2022-12-14 10:19:53,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:19:55,979 INFO L134 CoverageAnalysis]: Checked inductivity of 12558 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 8372 trivial. 0 not checked. [2022-12-14 10:19:55,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035246369] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:19:55,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1497641095] [2022-12-14 10:19:55,981 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 10:19:55,981 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:19:55,981 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:19:55,981 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:19:55,981 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:19:56,279 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-12-14 10:19:56,281 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:19:56,629 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5593#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 10:19:56,629 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:19:56,630 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:19:56,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 97 [2022-12-14 10:19:56,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749491339] [2022-12-14 10:19:56,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:19:56,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-12-14 10:19:56,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:19:56,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-12-14 10:19:56,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4690, Invalid=6230, Unknown=0, NotChecked=0, Total=10920 [2022-12-14 10:19:56,638 INFO L87 Difference]: Start difference. First operand 191 states and 282 transitions. Second operand has 97 states, 97 states have (on average 2.0) internal successors, (194), 97 states have internal predecessors, (194), 93 states have call successors, (186), 1 states have call predecessors, (186), 1 states have return successors, (186), 93 states have call predecessors, (186), 93 states have call successors, (186) [2022-12-14 10:19:57,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:19:57,222 INFO L93 Difference]: Finished difference Result 386 states and 620 transitions. [2022-12-14 10:19:57,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-12-14 10:19:57,223 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.0) internal successors, (194), 97 states have internal predecessors, (194), 93 states have call successors, (186), 1 states have call predecessors, (186), 1 states have return successors, (186), 93 states have call predecessors, (186), 93 states have call successors, (186) Word has length 372 [2022-12-14 10:19:57,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:19:57,227 INFO L225 Difference]: With dead ends: 386 [2022-12-14 10:19:57,227 INFO L226 Difference]: Without dead ends: 383 [2022-12-14 10:19:57,230 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1163 GetRequests, 1060 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1328 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=4690, Invalid=6230, Unknown=0, NotChecked=0, Total=10920 [2022-12-14 10:19:57,230 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 2 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 926 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 926 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 10:19:57,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 212 Invalid, 930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 926 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 10:19:57,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2022-12-14 10:19:57,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 383. [2022-12-14 10:19:57,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 193 states have (on average 1.005181347150259) internal successors, (194), 193 states have internal predecessors, (194), 188 states have call successors, (188), 1 states have call predecessors, (188), 1 states have return successors, (188), 188 states have call predecessors, (188), 188 states have call successors, (188) [2022-12-14 10:19:57,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 570 transitions. [2022-12-14 10:19:57,269 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 570 transitions. Word has length 372 [2022-12-14 10:19:57,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:19:57,271 INFO L495 AbstractCegarLoop]: Abstraction has 383 states and 570 transitions. [2022-12-14 10:19:57,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 2.0) internal successors, (194), 97 states have internal predecessors, (194), 93 states have call successors, (186), 1 states have call predecessors, (186), 1 states have return successors, (186), 93 states have call predecessors, (186), 93 states have call successors, (186) [2022-12-14 10:19:57,272 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 570 transitions. [2022-12-14 10:19:57,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 757 [2022-12-14 10:19:57,289 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:19:57,289 INFO L195 NwaCegarLoop]: trace histogram [188, 94, 94, 94, 94, 94, 94, 1, 1, 1, 1] [2022-12-14 10:19:57,295 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe36827-73ec-42a8-9df8-fb8bc1fa606e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 10:19:57,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe36827-73ec-42a8-9df8-fb8bc1fa606e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:19:57,491 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:19:57,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:19:57,492 INFO L85 PathProgramCache]: Analyzing trace with hash 668666130, now seen corresponding path program 6 times [2022-12-14 10:19:57,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:19:57,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559698775] [2022-12-14 10:19:57,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:19:57,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:19:57,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:20:05,031 INFO L134 CoverageAnalysis]: Checked inductivity of 52734 backedges. 0 proven. 17578 refuted. 0 times theorem prover too weak. 35156 trivial. 0 not checked. [2022-12-14 10:20:05,031 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:20:05,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559698775] [2022-12-14 10:20:05,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559698775] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:20:05,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167549476] [2022-12-14 10:20:05,031 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 10:20:05,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:20:05,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe36827-73ec-42a8-9df8-fb8bc1fa606e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:20:05,032 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe36827-73ec-42a8-9df8-fb8bc1fa606e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:20:05,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe36827-73ec-42a8-9df8-fb8bc1fa606e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 10:20:05,478 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 10:20:05,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:20:05,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 2479 conjuncts, 96 conjunts are in the unsatisfiable core [2022-12-14 10:20:05,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:20:05,825 INFO L134 CoverageAnalysis]: Checked inductivity of 52734 backedges. 0 proven. 17578 refuted. 0 times theorem prover too weak. 35156 trivial. 0 not checked. [2022-12-14 10:20:05,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:20:13,121 INFO L134 CoverageAnalysis]: Checked inductivity of 52734 backedges. 0 proven. 17578 refuted. 0 times theorem prover too weak. 35156 trivial. 0 not checked. [2022-12-14 10:20:13,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167549476] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:20:13,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [741045623] [2022-12-14 10:20:13,122 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 10:20:13,122 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:20:13,123 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:20:13,123 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:20:13,123 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:20:13,369 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-12-14 10:20:13,370 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:20:13,900 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11661#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 10:20:13,900 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:20:13,900 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:20:13,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97, 97] total 193 [2022-12-14 10:20:13,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719791966] [2022-12-14 10:20:13,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:20:13,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2022-12-14 10:20:13,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:20:13,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2022-12-14 10:20:13,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18562, Invalid=21638, Unknown=0, NotChecked=0, Total=40200 [2022-12-14 10:20:13,918 INFO L87 Difference]: Start difference. First operand 383 states and 570 transitions. Second operand has 193 states, 193 states have (on average 2.0) internal successors, (386), 193 states have internal predecessors, (386), 189 states have call successors, (378), 1 states have call predecessors, (378), 1 states have return successors, (378), 189 states have call predecessors, (378), 189 states have call successors, (378) [2022-12-14 10:20:15,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:20:15,347 INFO L93 Difference]: Finished difference Result 770 states and 1244 transitions. [2022-12-14 10:20:15,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2022-12-14 10:20:15,348 INFO L78 Accepts]: Start accepts. Automaton has has 193 states, 193 states have (on average 2.0) internal successors, (386), 193 states have internal predecessors, (386), 189 states have call successors, (378), 1 states have call predecessors, (378), 1 states have return successors, (378), 189 states have call predecessors, (378), 189 states have call successors, (378) Word has length 756 [2022-12-14 10:20:15,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:20:15,351 INFO L225 Difference]: With dead ends: 770 [2022-12-14 10:20:15,351 INFO L226 Difference]: Without dead ends: 767 [2022-12-14 10:20:15,354 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2363 GetRequests, 2164 SyntacticMatches, 0 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2672 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=18562, Invalid=21638, Unknown=0, NotChecked=0, Total=40200 [2022-12-14 10:20:15,354 INFO L413 NwaCegarLoop]: 384 mSDtfsCounter, 2 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2364 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 2368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 2364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-14 10:20:15,355 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 392 Invalid, 2368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 2364 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-14 10:20:15,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2022-12-14 10:20:15,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 767. [2022-12-14 10:20:15,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 767 states, 385 states have (on average 1.0025974025974025) internal successors, (386), 385 states have internal predecessors, (386), 380 states have call successors, (380), 1 states have call predecessors, (380), 1 states have return successors, (380), 380 states have call predecessors, (380), 380 states have call successors, (380) [2022-12-14 10:20:15,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 767 states to 767 states and 1146 transitions. [2022-12-14 10:20:15,385 INFO L78 Accepts]: Start accepts. Automaton has 767 states and 1146 transitions. Word has length 756 [2022-12-14 10:20:15,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:20:15,386 INFO L495 AbstractCegarLoop]: Abstraction has 767 states and 1146 transitions. [2022-12-14 10:20:15,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 193 states, 193 states have (on average 2.0) internal successors, (386), 193 states have internal predecessors, (386), 189 states have call successors, (378), 1 states have call predecessors, (378), 1 states have return successors, (378), 189 states have call predecessors, (378), 189 states have call successors, (378) [2022-12-14 10:20:15,387 INFO L276 IsEmpty]: Start isEmpty. Operand 767 states and 1146 transitions. [2022-12-14 10:20:15,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1525 [2022-12-14 10:20:15,400 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:20:15,400 INFO L195 NwaCegarLoop]: trace histogram [380, 190, 190, 190, 190, 190, 190, 1, 1, 1, 1] [2022-12-14 10:20:15,409 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe36827-73ec-42a8-9df8-fb8bc1fa606e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-14 10:20:15,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe36827-73ec-42a8-9df8-fb8bc1fa606e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:20:15,602 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:20:15,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:20:15,604 INFO L85 PathProgramCache]: Analyzing trace with hash 543253714, now seen corresponding path program 7 times [2022-12-14 10:20:15,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:20:15,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350070951] [2022-12-14 10:20:15,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:20:15,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:20:15,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:21:01,082 INFO L134 CoverageAnalysis]: Checked inductivity of 216030 backedges. 0 proven. 72010 refuted. 0 times theorem prover too weak. 144020 trivial. 0 not checked. [2022-12-14 10:21:01,082 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:21:01,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350070951] [2022-12-14 10:21:01,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350070951] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:21:01,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944441762] [2022-12-14 10:21:01,082 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 10:21:01,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:21:01,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe36827-73ec-42a8-9df8-fb8bc1fa606e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:21:01,083 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe36827-73ec-42a8-9df8-fb8bc1fa606e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:21:01,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe36827-73ec-42a8-9df8-fb8bc1fa606e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 10:21:01,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:21:01,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 4975 conjuncts, 192 conjunts are in the unsatisfiable core [2022-12-14 10:21:01,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:21:02,557 INFO L134 CoverageAnalysis]: Checked inductivity of 216030 backedges. 0 proven. 72010 refuted. 0 times theorem prover too weak. 144020 trivial. 0 not checked. [2022-12-14 10:21:02,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:21:31,157 INFO L134 CoverageAnalysis]: Checked inductivity of 216030 backedges. 0 proven. 72010 refuted. 0 times theorem prover too weak. 144020 trivial. 0 not checked. [2022-12-14 10:21:31,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944441762] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:21:31,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1487869814] [2022-12-14 10:21:31,159 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 10:21:31,159 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:21:31,159 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:21:31,159 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:21:31,159 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:21:31,422 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-12-14 10:21:31,423 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:21:32,438 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '23873#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 10:21:32,438 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:21:32,438 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:21:32,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [193, 193, 193] total 385 [2022-12-14 10:21:32,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022369669] [2022-12-14 10:21:32,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:21:32,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 385 states [2022-12-14 10:21:32,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:21:32,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 385 interpolants. [2022-12-14 10:21:32,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73954, Invalid=80102, Unknown=0, NotChecked=0, Total=154056 [2022-12-14 10:21:32,469 INFO L87 Difference]: Start difference. First operand 767 states and 1146 transitions. Second operand has 385 states, 385 states have (on average 2.0) internal successors, (770), 385 states have internal predecessors, (770), 381 states have call successors, (762), 1 states have call predecessors, (762), 1 states have return successors, (762), 381 states have call predecessors, (762), 381 states have call successors, (762) [2022-12-14 10:21:38,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:21:38,660 INFO L93 Difference]: Finished difference Result 1538 states and 2492 transitions. [2022-12-14 10:21:38,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 384 states. [2022-12-14 10:21:38,663 INFO L78 Accepts]: Start accepts. Automaton has has 385 states, 385 states have (on average 2.0) internal successors, (770), 385 states have internal predecessors, (770), 381 states have call successors, (762), 1 states have call predecessors, (762), 1 states have return successors, (762), 381 states have call predecessors, (762), 381 states have call successors, (762) Word has length 1524 [2022-12-14 10:21:38,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:21:38,669 INFO L225 Difference]: With dead ends: 1538 [2022-12-14 10:21:38,669 INFO L226 Difference]: Without dead ends: 1535 [2022-12-14 10:21:38,676 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4763 GetRequests, 4372 SyntacticMatches, 0 SemanticMatches, 391 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5360 ImplicationChecksByTransitivity, 37.2s TimeCoverageRelationStatistics Valid=73954, Invalid=80102, Unknown=0, NotChecked=0, Total=154056 [2022-12-14 10:21:38,677 INFO L413 NwaCegarLoop]: 768 mSDtfsCounter, 2 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 5096 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 800 SdHoareTripleChecker+Invalid, 5100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 5096 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-12-14 10:21:38,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 800 Invalid, 5100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 5096 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-12-14 10:21:38,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1535 states. [2022-12-14 10:21:38,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1535 to 1535. [2022-12-14 10:21:38,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1535 states, 769 states have (on average 1.0013003901170352) internal successors, (770), 769 states have internal predecessors, (770), 764 states have call successors, (764), 1 states have call predecessors, (764), 1 states have return successors, (764), 764 states have call predecessors, (764), 764 states have call successors, (764) [2022-12-14 10:21:38,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1535 states to 1535 states and 2298 transitions. [2022-12-14 10:21:38,730 INFO L78 Accepts]: Start accepts. Automaton has 1535 states and 2298 transitions. Word has length 1524 [2022-12-14 10:21:38,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:21:38,733 INFO L495 AbstractCegarLoop]: Abstraction has 1535 states and 2298 transitions. [2022-12-14 10:21:38,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 385 states, 385 states have (on average 2.0) internal successors, (770), 385 states have internal predecessors, (770), 381 states have call successors, (762), 1 states have call predecessors, (762), 1 states have return successors, (762), 381 states have call predecessors, (762), 381 states have call successors, (762) [2022-12-14 10:21:38,734 INFO L276 IsEmpty]: Start isEmpty. Operand 1535 states and 2298 transitions. [2022-12-14 10:21:38,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3061 [2022-12-14 10:21:38,782 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:21:38,783 INFO L195 NwaCegarLoop]: trace histogram [764, 382, 382, 382, 382, 382, 382, 1, 1, 1, 1] [2022-12-14 10:21:38,796 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe36827-73ec-42a8-9df8-fb8bc1fa606e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 10:21:38,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe36827-73ec-42a8-9df8-fb8bc1fa606e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-12-14 10:21:38,983 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:21:38,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:21:38,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1454775378, now seen corresponding path program 8 times [2022-12-14 10:21:38,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:21:38,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371042443] [2022-12-14 10:21:38,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:21:38,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:21:39,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:26:54,087 INFO L134 CoverageAnalysis]: Checked inductivity of 874398 backedges. 0 proven. 291466 refuted. 0 times theorem prover too weak. 582932 trivial. 0 not checked. [2022-12-14 10:26:54,087 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:26:54,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371042443] [2022-12-14 10:26:54,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371042443] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:26:54,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063719319] [2022-12-14 10:26:54,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 10:26:54,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:26:54,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe36827-73ec-42a8-9df8-fb8bc1fa606e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:26:54,089 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe36827-73ec-42a8-9df8-fb8bc1fa606e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:26:54,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe36827-73ec-42a8-9df8-fb8bc1fa606e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 10:27:15,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 511 check-sat command(s) [2022-12-14 10:27:15,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:27:16,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 9967 conjuncts, 384 conjunts are in the unsatisfiable core [2022-12-14 10:27:16,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:27:17,504 INFO L134 CoverageAnalysis]: Checked inductivity of 874398 backedges. 0 proven. 291466 refuted. 0 times theorem prover too weak. 582932 trivial. 0 not checked. [2022-12-14 10:27:17,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:29:04,170 INFO L134 CoverageAnalysis]: Checked inductivity of 874398 backedges. 0 proven. 291466 refuted. 0 times theorem prover too weak. 582932 trivial. 0 not checked. [2022-12-14 10:29:04,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063719319] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:29:04,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1245434310] [2022-12-14 10:29:04,173 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 10:29:04,174 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:29:04,174 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:29:04,174 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:29:04,174 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:29:04,434 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-12-14 10:29:04,435 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:29:05,891 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '48373#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 10:29:05,891 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:29:05,892 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:29:05,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [385, 385, 385] total 769 [2022-12-14 10:29:05,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445771349] [2022-12-14 10:29:05,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:29:05,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 769 states [2022-12-14 10:29:05,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:29:05,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 769 interpolants. [2022-12-14 10:29:05,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=295330, Invalid=307622, Unknown=0, NotChecked=0, Total=602952 [2022-12-14 10:29:05,966 INFO L87 Difference]: Start difference. First operand 1535 states and 2298 transitions. Second operand has 769 states, 769 states have (on average 2.0) internal successors, (1538), 769 states have internal predecessors, (1538), 765 states have call successors, (1530), 1 states have call predecessors, (1530), 1 states have return successors, (1530), 765 states have call predecessors, (1530), 765 states have call successors, (1530) [2022-12-14 10:29:33,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:29:33,311 INFO L93 Difference]: Finished difference Result 3074 states and 4988 transitions. [2022-12-14 10:29:33,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 768 states. [2022-12-14 10:29:33,314 INFO L78 Accepts]: Start accepts. Automaton has has 769 states, 769 states have (on average 2.0) internal successors, (1538), 769 states have internal predecessors, (1538), 765 states have call successors, (1530), 1 states have call predecessors, (1530), 1 states have return successors, (1530), 765 states have call predecessors, (1530), 765 states have call successors, (1530) Word has length 3060 [2022-12-14 10:29:33,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:29:33,325 INFO L225 Difference]: With dead ends: 3074 [2022-12-14 10:29:33,326 INFO L226 Difference]: Without dead ends: 3071 [2022-12-14 10:29:33,353 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9563 GetRequests, 8788 SyntacticMatches, 0 SemanticMatches, 775 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10736 ImplicationChecksByTransitivity, 138.3s TimeCoverageRelationStatistics Valid=295330, Invalid=307622, Unknown=0, NotChecked=0, Total=602952 [2022-12-14 10:29:33,353 INFO L413 NwaCegarLoop]: 1536 mSDtfsCounter, 2 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 11180 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 1568 SdHoareTripleChecker+Invalid, 11182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-12-14 10:29:33,354 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 1568 Invalid, 11182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11180 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2022-12-14 10:29:33,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3071 states. [2022-12-14 10:29:33,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3071 to 3071. [2022-12-14 10:29:33,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3071 states, 1537 states have (on average 1.0006506180871828) internal successors, (1538), 1537 states have internal predecessors, (1538), 1532 states have call successors, (1532), 1 states have call predecessors, (1532), 1 states have return successors, (1532), 1532 states have call predecessors, (1532), 1532 states have call successors, (1532) [2022-12-14 10:29:33,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3071 states to 3071 states and 4602 transitions. [2022-12-14 10:29:33,457 INFO L78 Accepts]: Start accepts. Automaton has 3071 states and 4602 transitions. Word has length 3060 [2022-12-14 10:29:33,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:29:33,460 INFO L495 AbstractCegarLoop]: Abstraction has 3071 states and 4602 transitions. [2022-12-14 10:29:33,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 769 states, 769 states have (on average 2.0) internal successors, (1538), 769 states have internal predecessors, (1538), 765 states have call successors, (1530), 1 states have call predecessors, (1530), 1 states have return successors, (1530), 765 states have call predecessors, (1530), 765 states have call successors, (1530) [2022-12-14 10:29:33,463 INFO L276 IsEmpty]: Start isEmpty. Operand 3071 states and 4602 transitions. [2022-12-14 10:29:33,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6133 [2022-12-14 10:29:33,641 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:29:33,642 INFO L195 NwaCegarLoop]: trace histogram [1532, 766, 766, 766, 766, 766, 766, 1, 1, 1, 1] [2022-12-14 10:29:33,669 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe36827-73ec-42a8-9df8-fb8bc1fa606e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 10:29:33,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe36827-73ec-42a8-9df8-fb8bc1fa606e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-12-14 10:29:33,843 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:29:33,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:29:33,847 INFO L85 PathProgramCache]: Analyzing trace with hash -662729902, now seen corresponding path program 9 times [2022-12-14 10:29:33,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:29:33,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228040425] [2022-12-14 10:29:33,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:29:33,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:29:36,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat