./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/heap-data/running_example.i --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_9aee268a-820c-4b7e-8d5e-4cac8a3e7594/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee268a-820c-4b7e-8d5e-4cac8a3e7594/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_9aee268a-820c-4b7e-8d5e-4cac8a3e7594/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee268a-820c-4b7e-8d5e-4cac8a3e7594/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/heap-data/running_example.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee268a-820c-4b7e-8d5e-4cac8a3e7594/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_9aee268a-820c-4b7e-8d5e-4cac8a3e7594/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 318c7aa22aeecc0174739978e9fb15d261281003454726c8705d95a97106063f --- 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 07:50:39,017 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 07:50:39,019 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 07:50:39,041 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 07:50:39,042 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 07:50:39,043 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 07:50:39,045 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 07:50:39,047 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 07:50:39,047 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 07:50:39,048 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 07:50:39,049 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 07:50:39,049 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 07:50:39,049 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 07:50:39,050 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 07:50:39,051 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 07:50:39,051 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 07:50:39,052 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 07:50:39,053 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 07:50:39,054 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 07:50:39,055 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 07:50:39,055 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 07:50:39,057 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 07:50:39,059 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 07:50:39,060 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 07:50:39,067 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 07:50:39,067 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 07:50:39,068 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 07:50:39,069 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 07:50:39,070 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 07:50:39,071 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 07:50:39,071 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 07:50:39,072 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 07:50:39,073 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 07:50:39,074 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 07:50:39,075 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 07:50:39,075 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 07:50:39,076 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 07:50:39,076 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 07:50:39,076 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 07:50:39,077 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 07:50:39,077 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 07:50:39,078 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee268a-820c-4b7e-8d5e-4cac8a3e7594/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 07:50:39,100 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 07:50:39,100 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 07:50:39,100 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 07:50:39,101 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 07:50:39,101 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 07:50:39,101 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 07:50:39,102 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 07:50:39,102 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 07:50:39,102 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 07:50:39,102 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 07:50:39,102 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 07:50:39,102 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 07:50:39,103 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 07:50:39,103 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 07:50:39,103 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 07:50:39,103 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 07:50:39,103 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 07:50:39,103 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 07:50:39,104 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 07:50:39,104 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 07:50:39,104 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 07:50:39,105 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 07:50:39,105 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 07:50:39,105 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 07:50:39,105 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 07:50:39,105 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 07:50:39,105 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 07:50:39,106 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 07:50:39,106 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 07:50:39,106 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 07:50:39,106 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 07:50:39,106 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 07:50:39,106 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 07:50:39,107 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 07:50:39,107 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 07:50:39,107 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 07:50:39,107 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 07:50:39,107 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 07:50:39,107 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 07:50:39,108 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 07:50:39,108 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 07:50:39,108 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_9aee268a-820c-4b7e-8d5e-4cac8a3e7594/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee268a-820c-4b7e-8d5e-4cac8a3e7594/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 318c7aa22aeecc0174739978e9fb15d261281003454726c8705d95a97106063f [2022-12-14 07:50:39,299 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 07:50:39,319 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 07:50:39,321 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 07:50:39,323 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 07:50:39,323 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 07:50:39,324 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee268a-820c-4b7e-8d5e-4cac8a3e7594/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/heap-data/running_example.i [2022-12-14 07:50:41,918 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 07:50:42,124 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 07:50:42,125 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee268a-820c-4b7e-8d5e-4cac8a3e7594/sv-benchmarks/c/heap-data/running_example.i [2022-12-14 07:50:42,139 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee268a-820c-4b7e-8d5e-4cac8a3e7594/bin/utaipan-gh47qXpMRh/data/f92c1073d/01f3734ce0964e039c4746f737592709/FLAG31c77e775 [2022-12-14 07:50:42,493 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee268a-820c-4b7e-8d5e-4cac8a3e7594/bin/utaipan-gh47qXpMRh/data/f92c1073d/01f3734ce0964e039c4746f737592709 [2022-12-14 07:50:42,498 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 07:50:42,500 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 07:50:42,502 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 07:50:42,503 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 07:50:42,507 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 07:50:42,508 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:50:42" (1/1) ... [2022-12-14 07:50:42,509 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11e216e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:50:42, skipping insertion in model container [2022-12-14 07:50:42,509 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:50:42" (1/1) ... [2022-12-14 07:50:42,516 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 07:50:42,541 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 07:50:42,734 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_9aee268a-820c-4b7e-8d5e-4cac8a3e7594/sv-benchmarks/c/heap-data/running_example.i[23610,23623] [2022-12-14 07:50:42,740 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 07:50:42,749 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 07:50:42,784 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_9aee268a-820c-4b7e-8d5e-4cac8a3e7594/sv-benchmarks/c/heap-data/running_example.i[23610,23623] [2022-12-14 07:50:42,786 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 07:50:42,808 INFO L208 MainTranslator]: Completed translation [2022-12-14 07:50:42,808 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:50:42 WrapperNode [2022-12-14 07:50:42,808 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 07:50:42,809 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 07:50:42,810 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 07:50:42,810 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 07:50:42,816 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:50:42" (1/1) ... [2022-12-14 07:50:42,827 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:50:42" (1/1) ... [2022-12-14 07:50:42,846 INFO L138 Inliner]: procedures = 121, calls = 21, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 72 [2022-12-14 07:50:42,846 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 07:50:42,847 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 07:50:42,847 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 07:50:42,847 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 07:50:42,855 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:50:42" (1/1) ... [2022-12-14 07:50:42,856 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:50:42" (1/1) ... [2022-12-14 07:50:42,858 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:50:42" (1/1) ... [2022-12-14 07:50:42,859 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:50:42" (1/1) ... [2022-12-14 07:50:42,864 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:50:42" (1/1) ... [2022-12-14 07:50:42,868 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:50:42" (1/1) ... [2022-12-14 07:50:42,869 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:50:42" (1/1) ... [2022-12-14 07:50:42,870 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:50:42" (1/1) ... [2022-12-14 07:50:42,872 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 07:50:42,873 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 07:50:42,873 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 07:50:42,873 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 07:50:42,874 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:50:42" (1/1) ... [2022-12-14 07:50:42,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 07:50:42,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee268a-820c-4b7e-8d5e-4cac8a3e7594/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:50:42,900 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee268a-820c-4b7e-8d5e-4cac8a3e7594/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 07:50:42,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee268a-820c-4b7e-8d5e-4cac8a3e7594/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 07:50:42,937 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 07:50:42,937 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 07:50:42,938 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-14 07:50:42,938 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 07:50:42,938 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-12-14 07:50:42,938 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-12-14 07:50:42,938 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 07:50:42,938 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 07:50:42,938 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 07:50:43,018 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 07:50:43,020 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 07:50:43,141 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 07:50:43,188 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 07:50:43,189 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-14 07:50:43,193 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:50:43 BoogieIcfgContainer [2022-12-14 07:50:43,193 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 07:50:43,195 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 07:50:43,195 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 07:50:43,198 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 07:50:43,199 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 07:50:42" (1/3) ... [2022-12-14 07:50:43,199 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fe1e73f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:50:43, skipping insertion in model container [2022-12-14 07:50:43,199 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:50:42" (2/3) ... [2022-12-14 07:50:43,200 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fe1e73f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:50:43, skipping insertion in model container [2022-12-14 07:50:43,200 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:50:43" (3/3) ... [2022-12-14 07:50:43,201 INFO L112 eAbstractionObserver]: Analyzing ICFG running_example.i [2022-12-14 07:50:43,220 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 07:50:43,221 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 07:50:43,256 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 07:50:43,261 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;@6ff808e4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 07:50:43,261 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 07:50:43,264 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.7) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:50:43,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 07:50:43,269 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:50:43,269 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 07:50:43,270 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:50:43,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:50:43,275 INFO L85 PathProgramCache]: Analyzing trace with hash -1470856896, now seen corresponding path program 1 times [2022-12-14 07:50:43,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:50:43,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275900590] [2022-12-14 07:50:43,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:50:43,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:50:43,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:50:43,424 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 07:50:43,425 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:50:43,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275900590] [2022-12-14 07:50:43,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275900590] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:50:43,426 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:50:43,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 07:50:43,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698161987] [2022-12-14 07:50:43,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:50:43,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-14 07:50:43,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:50:43,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-14 07:50:43,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 07:50:43,463 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.7) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:50:43,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:50:43,491 INFO L93 Difference]: Finished difference Result 18 states and 26 transitions. [2022-12-14 07:50:43,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-14 07:50:43,498 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-14 07:50:43,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:50:43,505 INFO L225 Difference]: With dead ends: 18 [2022-12-14 07:50:43,505 INFO L226 Difference]: Without dead ends: 11 [2022-12-14 07:50:43,507 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 07:50:43,511 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:50:43,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 10 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 07:50:43,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2022-12-14 07:50:43,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2022-12-14 07:50:43,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.4) internal successors, (14), 10 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:50:43,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 14 transitions. [2022-12-14 07:50:43,537 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 14 transitions. Word has length 6 [2022-12-14 07:50:43,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:50:43,538 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 14 transitions. [2022-12-14 07:50:43,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:50:43,538 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 14 transitions. [2022-12-14 07:50:43,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-14 07:50:43,539 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:50:43,539 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:50:43,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 07:50:43,539 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:50:43,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:50:43,540 INFO L85 PathProgramCache]: Analyzing trace with hash 237321750, now seen corresponding path program 1 times [2022-12-14 07:50:43,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:50:43,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275457287] [2022-12-14 07:50:43,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:50:43,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:50:43,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:50:43,787 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 07:50:43,787 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:50:43,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275457287] [2022-12-14 07:50:43,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275457287] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:50:43,788 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:50:43,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 07:50:43,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127445824] [2022-12-14 07:50:43,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:50:43,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 07:50:43,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:50:43,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 07:50:43,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:50:43,790 INFO L87 Difference]: Start difference. First operand 11 states and 14 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:50:43,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:50:43,865 INFO L93 Difference]: Finished difference Result 22 states and 28 transitions. [2022-12-14 07:50:43,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 07:50:43,865 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-12-14 07:50:43,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:50:43,865 INFO L225 Difference]: With dead ends: 22 [2022-12-14 07:50:43,865 INFO L226 Difference]: Without dead ends: 20 [2022-12-14 07:50:43,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 07:50:43,867 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 9 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:50:43,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 29 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 07:50:43,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-12-14 07:50:43,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2022-12-14 07:50:43,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 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 07:50:43,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 24 transitions. [2022-12-14 07:50:43,870 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 24 transitions. Word has length 8 [2022-12-14 07:50:43,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:50:43,871 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 24 transitions. [2022-12-14 07:50:43,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:50:43,871 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 24 transitions. [2022-12-14 07:50:43,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 07:50:43,871 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:50:43,871 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:50:43,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 07:50:43,871 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:50:43,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:50:43,872 INFO L85 PathProgramCache]: Analyzing trace with hash 540596448, now seen corresponding path program 1 times [2022-12-14 07:50:43,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:50:43,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879382659] [2022-12-14 07:50:43,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:50:43,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:50:43,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:50:44,190 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:50:44,190 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:50:44,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879382659] [2022-12-14 07:50:44,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879382659] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:50:44,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365259064] [2022-12-14 07:50:44,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:50:44,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:50:44,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee268a-820c-4b7e-8d5e-4cac8a3e7594/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:50:44,192 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee268a-820c-4b7e-8d5e-4cac8a3e7594/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:50:44,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee268a-820c-4b7e-8d5e-4cac8a3e7594/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 07:50:44,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:50:44,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 07:50:44,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:50:44,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:50:44,305 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2022-12-14 07:50:44,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:50:44,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2022-12-14 07:50:44,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 85 [2022-12-14 07:50:44,439 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 76 [2022-12-14 07:50:44,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 59 [2022-12-14 07:50:44,463 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 37 [2022-12-14 07:50:44,507 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 07:50:44,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 07:50:44,516 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:50:44,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:50:44,572 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 07:50:44,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 92 treesize of output 104 [2022-12-14 07:50:44,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 78 [2022-12-14 07:50:44,663 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:50:44,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365259064] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:50:44,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [700995036] [2022-12-14 07:50:44,682 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 07:50:44,682 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:50:44,685 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:50:44,691 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:50:44,691 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:50:44,746 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-12-14 07:50:44,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 30 [2022-12-14 07:50:44,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:50:44,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:50:44,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:50:44,773 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 07:50:44,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 41 [2022-12-14 07:50:44,805 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 07:50:44,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 27 treesize of output 41 [2022-12-14 07:50:44,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:50:44,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2022-12-14 07:50:44,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:50:44,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2022-12-14 07:50:44,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:50:44,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-12-14 07:50:44,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:50:44,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-12-14 07:50:44,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:50:44,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-12-14 07:50:45,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:50:45,029 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-12-14 07:50:45,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:50:45,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-12-14 07:50:45,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:50:45,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-12-14 07:50:45,125 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:50:45,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [700995036] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:50:45,780 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:50:45,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [4, 4, 4] total 13 [2022-12-14 07:50:45,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074868893] [2022-12-14 07:50:45,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:50:45,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 07:50:45,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:50:45,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 07:50:45,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-12-14 07:50:45,782 INFO L87 Difference]: Start difference. First operand 18 states and 24 transitions. Second operand has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:50:45,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:50:45,894 INFO L93 Difference]: Finished difference Result 31 states and 41 transitions. [2022-12-14 07:50:45,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 07:50:45,895 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-12-14 07:50:45,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:50:45,896 INFO L225 Difference]: With dead ends: 31 [2022-12-14 07:50:45,896 INFO L226 Difference]: Without dead ends: 22 [2022-12-14 07:50:45,896 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-12-14 07:50:45,897 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 3 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:50:45,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 27 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:50:45,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-12-14 07:50:45,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2022-12-14 07:50:45,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:50:45,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2022-12-14 07:50:45,904 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 26 transitions. Word has length 11 [2022-12-14 07:50:45,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:50:45,904 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 26 transitions. [2022-12-14 07:50:45,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:50:45,904 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 26 transitions. [2022-12-14 07:50:45,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 07:50:45,905 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:50:45,905 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:50:45,910 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee268a-820c-4b7e-8d5e-4cac8a3e7594/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 07:50:46,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee268a-820c-4b7e-8d5e-4cac8a3e7594/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:50:46,107 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:50:46,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:50:46,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1081792080, now seen corresponding path program 1 times [2022-12-14 07:50:46,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:50:46,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877164105] [2022-12-14 07:50:46,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:50:46,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:50:46,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:50:46,359 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:50:46,359 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:50:46,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877164105] [2022-12-14 07:50:46,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877164105] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:50:46,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784165580] [2022-12-14 07:50:46,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:50:46,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:50:46,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee268a-820c-4b7e-8d5e-4cac8a3e7594/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:50:46,361 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee268a-820c-4b7e-8d5e-4cac8a3e7594/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:50:46,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee268a-820c-4b7e-8d5e-4cac8a3e7594/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 07:50:46,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:50:46,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-14 07:50:46,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:50:46,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 07:50:46,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 07:50:46,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:50:46,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2022-12-14 07:50:46,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:50:46,488 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 07:50:46,493 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-14 07:50:46,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-12-14 07:50:46,550 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2022-12-14 07:50:46,561 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:50:46,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:50:46,735 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:50:46,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784165580] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:50:46,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1833203908] [2022-12-14 07:50:46,737 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 07:50:46,737 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:50:46,737 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:50:46,738 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:50:46,738 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:50:46,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:50:46,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2022-12-14 07:50:46,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:50:46,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2022-12-14 07:50:46,780 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-12-14 07:50:46,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 30 [2022-12-14 07:50:46,808 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 07:50:46,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 27 treesize of output 41 [2022-12-14 07:50:46,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:50:46,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:50:46,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 37 [2022-12-14 07:50:46,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:50:46,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:50:46,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:50:46,885 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:50:46,911 INFO L321 Elim1Store]: treesize reduction 38, result has 48.6 percent of original size [2022-12-14 07:50:46,911 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 68 [2022-12-14 07:50:46,948 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 07:50:46,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 38 [2022-12-14 07:50:46,991 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 07:50:46,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-12-14 07:50:47,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:50:47,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 8 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 22 [2022-12-14 07:50:47,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:50:47,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 8 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 22 [2022-12-14 07:50:47,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:50:47,171 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:50:47,172 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:50:47,290 INFO L321 Elim1Store]: treesize reduction 169, result has 17.6 percent of original size [2022-12-14 07:50:47,291 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 322 treesize of output 308 [2022-12-14 07:50:47,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:50:47,323 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:50:47,324 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:50:47,432 INFO L321 Elim1Store]: treesize reduction 137, result has 33.2 percent of original size [2022-12-14 07:50:47,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 304 treesize of output 322 [2022-12-14 07:50:47,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:50:47,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:50:47,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:50:47,467 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:50:47,496 INFO L321 Elim1Store]: treesize reduction 69, result has 19.8 percent of original size [2022-12-14 07:50:47,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 265 treesize of output 252 [2022-12-14 07:50:47,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:50:47,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:50:47,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:50:47,526 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:50:47,557 INFO L321 Elim1Store]: treesize reduction 69, result has 19.8 percent of original size [2022-12-14 07:50:47,557 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 274 treesize of output 265 [2022-12-14 07:50:47,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:50:47,587 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:50:47,631 INFO L321 Elim1Store]: treesize reduction 92, result has 24.6 percent of original size [2022-12-14 07:50:47,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 266 treesize of output 270 [2022-12-14 07:50:47,712 INFO L321 Elim1Store]: treesize reduction 128, result has 22.4 percent of original size [2022-12-14 07:50:47,712 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 249 treesize of output 269 [2022-12-14 07:50:47,766 INFO L321 Elim1Store]: treesize reduction 78, result has 20.4 percent of original size [2022-12-14 07:50:47,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 242 treesize of output 251 [2022-12-14 07:50:48,986 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 07:50:49,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:50:49,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:50:49,003 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:50:49,025 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-12-14 07:50:49,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 23 [2022-12-14 07:50:49,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:50:49,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:50:49,037 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:50:49,045 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-12-14 07:50:49,046 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 19 [2022-12-14 07:50:49,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:50:49,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:50:49,064 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:50:49,073 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-12-14 07:50:49,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 30 [2022-12-14 07:50:49,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 07:50:49,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:50:49,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:50:49,173 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:50:49,198 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-12-14 07:50:49,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 23 [2022-12-14 07:50:49,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:50:49,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:50:49,210 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:50:49,221 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-12-14 07:50:49,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 19 [2022-12-14 07:50:49,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:50:49,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:50:49,245 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:50:49,254 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-12-14 07:50:49,255 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 30 [2022-12-14 07:50:49,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 07:50:49,276 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 07:50:49,290 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:50:49,541 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '348#(and (<= 0 |#NULL.base|) (<= 0 |ULTIMATE.start_main_~tail~0#1.offset|) (<= |#NULL.offset| 0) (or (< (select (select |#memory_int| |ULTIMATE.start_main_~p~0#1.base|) |ULTIMATE.start_main_~p~0#1.offset|) 10) (not (<= (select (select |#memory_int| |ULTIMATE.start_main_~p~0#1.base|) |ULTIMATE.start_main_~p~0#1.offset|) 20))) (<= 0 |ULTIMATE.start_main_~list~0#1.offset|) (= |ULTIMATE.start_main_~list~0#1.offset| |ULTIMATE.start_main_~p~0#1.offset|) (<= |#NULL.base| 0) (<= |ULTIMATE.start_main_~list~0#1.offset| 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (not (= 0 |ULTIMATE.start_main_~p~0#1.base|)) (<= |ULTIMATE.start_main_~tail~0#1.offset| 0) (= |ULTIMATE.start_main_~list~0#1.base| |ULTIMATE.start_main_~p~0#1.base|))' at error location [2022-12-14 07:50:49,541 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:50:49,541 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:50:49,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-12-14 07:50:49,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162335875] [2022-12-14 07:50:49,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 07:50:49,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-14 07:50:49,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:50:49,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-14 07:50:49,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2022-12-14 07:50:49,543 INFO L87 Difference]: Start difference. First operand 20 states and 26 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 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 07:50:50,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:50:50,076 INFO L93 Difference]: Finished difference Result 33 states and 42 transitions. [2022-12-14 07:50:50,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 07:50:50,076 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-12-14 07:50:50,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:50:50,076 INFO L225 Difference]: With dead ends: 33 [2022-12-14 07:50:50,077 INFO L226 Difference]: Without dead ends: 31 [2022-12-14 07:50:50,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=144, Invalid=506, Unknown=0, NotChecked=0, Total=650 [2022-12-14 07:50:50,077 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 58 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:50:50,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 58 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 07:50:50,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-12-14 07:50:50,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 22. [2022-12-14 07:50:50,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:50:50,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 29 transitions. [2022-12-14 07:50:50,082 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 29 transitions. Word has length 12 [2022-12-14 07:50:50,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:50:50,083 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 29 transitions. [2022-12-14 07:50:50,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 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 07:50:50,083 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 29 transitions. [2022-12-14 07:50:50,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 07:50:50,083 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:50:50,083 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:50:50,088 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee268a-820c-4b7e-8d5e-4cac8a3e7594/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-14 07:50:50,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee268a-820c-4b7e-8d5e-4cac8a3e7594/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:50:50,285 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:50:50,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:50:50,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1762222490, now seen corresponding path program 1 times [2022-12-14 07:50:50,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:50:50,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513043662] [2022-12-14 07:50:50,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:50:50,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:50:50,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:50:50,782 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:50:50,782 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:50:50,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513043662] [2022-12-14 07:50:50,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513043662] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:50:50,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213379640] [2022-12-14 07:50:50,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:50:50,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:50:50,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee268a-820c-4b7e-8d5e-4cac8a3e7594/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:50:50,784 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee268a-820c-4b7e-8d5e-4cac8a3e7594/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:50:50,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee268a-820c-4b7e-8d5e-4cac8a3e7594/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 07:50:50,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:50:50,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 50 conjunts are in the unsatisfiable core [2022-12-14 07:50:50,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:50:50,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 07:50:50,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 07:50:50,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:50:50,919 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 29 [2022-12-14 07:50:50,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 16 [2022-12-14 07:50:50,937 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-14 07:50:50,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 60 [2022-12-14 07:50:50,944 INFO L321 Elim1Store]: treesize reduction 4, result has 71.4 percent of original size [2022-12-14 07:50:50,944 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2022-12-14 07:50:50,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2022-12-14 07:50:50,950 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2022-12-14 07:50:50,954 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 25 [2022-12-14 07:50:50,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2022-12-14 07:50:51,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 32 [2022-12-14 07:50:51,090 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 24 [2022-12-14 07:50:51,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 07:50:51,128 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 39 [2022-12-14 07:50:51,138 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:50:51,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:50:51,374 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 07:50:51,374 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 129 treesize of output 130 [2022-12-14 07:50:51,383 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 07:50:51,383 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 114 [2022-12-14 07:50:51,405 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 07:50:51,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 294 treesize of output 215 [2022-12-14 07:50:51,415 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 07:50:51,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 197 treesize of output 168 [2022-12-14 07:50:51,431 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 07:50:51,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 312 treesize of output 293 [2022-12-14 07:50:51,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 277 treesize of output 261 [2022-12-14 07:50:51,449 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 261 treesize of output 245 [2022-12-14 08:01:43,767 WARN L233 SmtUtils]: Spent 10.60m on a formula simplification. DAG size of input: 345 DAG size of output: 184 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 08:01:51,517 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:01:51,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213379640] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:01:51,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [691174806] [2022-12-14 08:01:51,519 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 08:01:51,519 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:01:51,519 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:01:51,519 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:01:51,519 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:01:51,658 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-12-14 08:01:51,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 30 [2022-12-14 08:01:51,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:01:51,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2022-12-14 08:01:51,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:01:51,695 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2022-12-14 08:01:51,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:01:51,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:01:51,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:01:51,803 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 08:01:51,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 41 [2022-12-14 08:01:51,962 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 08:01:51,962 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 27 treesize of output 41 [2022-12-14 08:01:52,169 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 08:01:52,169 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 38 [2022-12-14 08:01:52,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:01:52,197 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:01:52,238 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-12-14 08:01:52,238 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 22 [2022-12-14 08:01:52,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:01:52,264 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:01:52,322 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-12-14 08:01:52,322 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 26 [2022-12-14 08:01:52,539 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 08:01:52,539 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-12-14 08:01:52,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:01:52,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:01:52,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:01:52,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 56 [2022-12-14 08:01:52,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:01:52,710 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:01:52,710 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:01:53,040 INFO L321 Elim1Store]: treesize reduction 169, result has 17.6 percent of original size [2022-12-14 08:01:53,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 322 treesize of output 308 [2022-12-14 08:01:53,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:01:53,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:01:53,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:01:53,152 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:01:53,312 INFO L321 Elim1Store]: treesize reduction 69, result has 19.8 percent of original size [2022-12-14 08:01:53,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 295 treesize of output 282 [2022-12-14 08:01:53,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:01:53,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:01:53,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:01:53,416 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:01:53,560 INFO L321 Elim1Store]: treesize reduction 69, result has 19.8 percent of original size [2022-12-14 08:01:53,561 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 304 treesize of output 295 [2022-12-14 08:01:53,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:01:53,617 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:01:53,847 INFO L321 Elim1Store]: treesize reduction 92, result has 24.6 percent of original size [2022-12-14 08:01:53,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 296 treesize of output 300 [2022-12-14 08:01:54,268 INFO L321 Elim1Store]: treesize reduction 124, result has 24.8 percent of original size [2022-12-14 08:01:54,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 279 treesize of output 303 [2022-12-14 08:01:54,481 INFO L321 Elim1Store]: treesize reduction 64, result has 19.0 percent of original size [2022-12-14 08:01:54,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 272 treesize of output 281 [2022-12-14 08:01:54,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:01:54,562 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:01:54,563 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:01:55,025 INFO L321 Elim1Store]: treesize reduction 117, result has 36.8 percent of original size [2022-12-14 08:01:55,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 304 treesize of output 322 [2022-12-14 08:01:56,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 08:01:56,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:01:56,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:01:56,384 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:01:56,443 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-12-14 08:01:56,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 19 [2022-12-14 08:01:56,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:01:56,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:01:56,478 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:01:56,550 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-12-14 08:01:56,550 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 23 [2022-12-14 08:01:56,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:01:56,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:01:56,604 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:01:56,666 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-12-14 08:01:56,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 30 [2022-12-14 08:01:56,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 08:01:56,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 149 treesize of output 137 [2022-12-14 08:01:56,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 113 [2022-12-14 08:01:56,812 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 116 treesize of output 86 [2022-12-14 08:01:56,842 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 45 [2022-12-14 08:01:56,853 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 43 [2022-12-14 08:01:56,873 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 38 [2022-12-14 08:01:56,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 149 treesize of output 137 [2022-12-14 08:01:56,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 104 [2022-12-14 08:01:56,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 57 [2022-12-14 08:01:56,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 45 [2022-12-14 08:01:56,984 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 43 [2022-12-14 08:01:57,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 36 [2022-12-14 08:01:57,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 149 treesize of output 137 [2022-12-14 08:01:57,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 113 [2022-12-14 08:01:57,072 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 80 [2022-12-14 08:01:57,099 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 46 [2022-12-14 08:01:57,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 36 [2022-12-14 08:01:57,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 43 [2022-12-14 08:01:57,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:01:57,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:01:57,240 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:01:57,315 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-12-14 08:01:57,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 23 [2022-12-14 08:01:57,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:01:57,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:01:57,349 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:01:57,396 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-12-14 08:01:57,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 19 [2022-12-14 08:01:57,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:01:57,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:01:57,440 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:01:57,493 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-12-14 08:01:57,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 30 [2022-12-14 08:01:57,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 08:01:57,528 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 08:01:57,545 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:02:00,191 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '549#(and (<= 0 |ULTIMATE.start_main_~tail~0#1.offset|) (= |ULTIMATE.start_main_~list~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= |ULTIMATE.start_main_~tail~0#1.offset| 0))' at error location [2022-12-14 08:02:00,191 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:02:00,191 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:02:00,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 15 [2022-12-14 08:02:00,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365770616] [2022-12-14 08:02:00,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 08:02:00,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-14 08:02:00,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:02:00,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-14 08:02:00,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=283, Unknown=6, NotChecked=0, Total=342 [2022-12-14 08:02:00,192 INFO L87 Difference]: Start difference. First operand 22 states and 29 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 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 08:02:05,084 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 08:02:06,818 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse3 (+ |c_ULTIMATE.start_main_~list~0#1.offset| 4))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~list~0#1.base|) .cse3)) (.cse1 (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~list~0#1.base|) .cse3)) (.cse2 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|) 0))) (and (forall ((v_ArrVal_253 (Array Int Int))) (<= 10 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~list~0#1.base| v_ArrVal_253) .cse0) .cse1))) (forall ((v_ArrVal_256 (Array Int Int))) (<= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~list~0#1.base| v_ArrVal_256) .cse0) .cse1) 20)) (not (< 20 .cse2)) (not (< .cse2 10)) |c_ULTIMATE.start_main_#t~short10#1| (= |c_ULTIMATE.start_main_~p~0#1.offset| 0)))) is different from false [2022-12-14 08:02:06,919 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse4 (+ |c_ULTIMATE.start_main_~p~0#1.offset| 4)) (.cse5 (+ |c_ULTIMATE.start_main_~list~0#1.offset| 4))) (let ((.cse2 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~list~0#1.base|) .cse5)) (.cse3 (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~list~0#1.base|) .cse5)) (.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~p~0#1.base|) .cse4)) (.cse1 (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~p~0#1.base|) .cse4))) (and (forall ((v_ArrVal_256 (Array Int Int))) (<= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_256) .cse0) .cse1) 20)) (forall ((v_ArrVal_253 (Array Int Int))) (<= 10 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~list~0#1.base| v_ArrVal_253) .cse2) .cse3))) (forall ((v_ArrVal_256 (Array Int Int))) (<= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~list~0#1.base| v_ArrVal_256) .cse2) .cse3) 20)) (forall ((v_ArrVal_253 (Array Int Int))) (<= 10 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_253) .cse0) .cse1)))))) is different from false [2022-12-14 08:02:07,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:02:07,281 INFO L93 Difference]: Finished difference Result 52 states and 68 transitions. [2022-12-14 08:02:07,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 08:02:07,281 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 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 15 [2022-12-14 08:02:07,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:02:07,283 INFO L225 Difference]: With dead ends: 52 [2022-12-14 08:02:07,283 INFO L226 Difference]: Without dead ends: 50 [2022-12-14 08:02:07,284 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 28 SyntacticMatches, 6 SemanticMatches, 26 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 654.0s TimeCoverageRelationStatistics Valid=122, Invalid=523, Unknown=13, NotChecked=98, Total=756 [2022-12-14 08:02:07,284 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 67 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 12 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 3 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-12-14 08:02:07,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 103 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 122 Invalid, 3 Unknown, 3 Unchecked, 4.5s Time] [2022-12-14 08:02:07,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-12-14 08:02:07,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 35. [2022-12-14 08:02:07,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 34 states have internal predecessors, (47), 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 08:02:07,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 47 transitions. [2022-12-14 08:02:07,301 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 47 transitions. Word has length 15 [2022-12-14 08:02:07,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:02:07,301 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 47 transitions. [2022-12-14 08:02:07,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 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 08:02:07,301 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 47 transitions. [2022-12-14 08:02:07,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-14 08:02:07,301 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:02:07,301 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:02:07,306 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee268a-820c-4b7e-8d5e-4cac8a3e7594/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 08:02:07,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee268a-820c-4b7e-8d5e-4cac8a3e7594/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:02:07,502 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:02:07,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:02:07,503 INFO L85 PathProgramCache]: Analyzing trace with hash 928709866, now seen corresponding path program 1 times [2022-12-14 08:02:07,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:02:07,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985530804] [2022-12-14 08:02:07,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:02:07,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:02:07,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:02:08,207 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:02:08,207 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:02:08,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985530804] [2022-12-14 08:02:08,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985530804] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:02:08,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138023795] [2022-12-14 08:02:08,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:02:08,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:02:08,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee268a-820c-4b7e-8d5e-4cac8a3e7594/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:02:08,208 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee268a-820c-4b7e-8d5e-4cac8a3e7594/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:02:08,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee268a-820c-4b7e-8d5e-4cac8a3e7594/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 08:02:08,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:02:08,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-14 08:02:08,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:02:08,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 12 [2022-12-14 08:02:08,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-12-14 08:02:08,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 08:02:08,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 08:02:08,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 85 [2022-12-14 08:02:08,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 69 [2022-12-14 08:02:08,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 60 [2022-12-14 08:02:08,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 37 [2022-12-14 08:02:09,017 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 08:02:09,034 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 08:02:09,048 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:02:09,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:02:09,649 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 08:02:09,650 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 73 [2022-12-14 08:02:09,677 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 08:02:09,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 67 [2022-12-14 08:02:09,720 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 08:02:09,721 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 60 treesize of output 72 [2022-12-14 08:02:09,735 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 46 [2022-12-14 08:02:09,797 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-12-14 08:02:09,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 25 [2022-12-14 08:02:09,849 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-12-14 08:02:09,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 12 [2022-12-14 08:02:09,986 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:02:09,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138023795] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:02:09,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2113190199] [2022-12-14 08:02:09,989 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 08:02:09,989 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:02:09,990 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:02:09,990 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:02:09,990 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:02:10,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:02:10,017 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2022-12-14 08:02:10,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:02:10,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2022-12-14 08:02:10,162 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-12-14 08:02:10,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 30 [2022-12-14 08:02:10,343 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 08:02:10,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 27 treesize of output 41 [2022-12-14 08:02:10,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:02:10,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:02:10,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 37 [2022-12-14 08:02:10,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:02:10,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-12-14 08:02:10,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:02:10,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-12-14 08:02:10,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:02:10,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-12-14 08:02:10,641 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 149 treesize of output 137 [2022-12-14 08:02:10,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 104 [2022-12-14 08:02:10,671 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 57 [2022-12-14 08:02:10,697 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 46 [2022-12-14 08:02:10,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 36 [2022-12-14 08:02:10,729 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 43 [2022-12-14 08:02:10,812 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 149 treesize of output 128 [2022-12-14 08:02:10,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 81 [2022-12-14 08:02:10,838 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 57 [2022-12-14 08:02:10,862 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 46 [2022-12-14 08:02:10,871 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 36 [2022-12-14 08:02:10,889 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 43 [2022-12-14 08:02:10,982 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:02:12,235 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '803#(and (<= 0 |ULTIMATE.start_main_~tail~0#1.offset|) (= |ULTIMATE.start_main_~list~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= |ULTIMATE.start_main_~tail~0#1.offset| 0))' at error location [2022-12-14 08:02:12,235 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:02:12,235 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:02:12,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 16 [2022-12-14 08:02:12,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541717151] [2022-12-14 08:02:12,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 08:02:12,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-14 08:02:12,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:02:12,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-14 08:02:12,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2022-12-14 08:02:12,237 INFO L87 Difference]: Start difference. First operand 35 states and 47 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 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 08:02:14,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:02:14,756 INFO L93 Difference]: Finished difference Result 79 states and 105 transitions. [2022-12-14 08:02:14,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-14 08:02:14,757 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-12-14 08:02:14,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:02:14,757 INFO L225 Difference]: With dead ends: 79 [2022-12-14 08:02:14,757 INFO L226 Difference]: Without dead ends: 34 [2022-12-14 08:02:14,758 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=231, Invalid=761, Unknown=0, NotChecked=0, Total=992 [2022-12-14 08:02:14,759 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 59 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 08:02:14,759 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 134 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 08:02:14,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-12-14 08:02:14,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 29. [2022-12-14 08:02:14,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.25) internal successors, (35), 28 states have internal predecessors, (35), 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 08:02:14,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2022-12-14 08:02:14,769 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 16 [2022-12-14 08:02:14,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:02:14,770 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2022-12-14 08:02:14,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 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 08:02:14,770 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2022-12-14 08:02:14,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-14 08:02:14,770 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:02:14,770 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:02:14,775 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee268a-820c-4b7e-8d5e-4cac8a3e7594/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 08:02:14,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee268a-820c-4b7e-8d5e-4cac8a3e7594/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-14 08:02:14,972 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:02:14,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:02:14,973 INFO L85 PathProgramCache]: Analyzing trace with hash -980429168, now seen corresponding path program 2 times [2022-12-14 08:02:14,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:02:14,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949403365] [2022-12-14 08:02:14,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:02:14,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:02:15,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:02:15,986 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:02:15,986 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:02:15,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949403365] [2022-12-14 08:02:15,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949403365] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:02:15,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214772726] [2022-12-14 08:02:15,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 08:02:15,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:02:15,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee268a-820c-4b7e-8d5e-4cac8a3e7594/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:02:15,988 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee268a-820c-4b7e-8d5e-4cac8a3e7594/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:02:15,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee268a-820c-4b7e-8d5e-4cac8a3e7594/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 08:02:16,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 08:02:16,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:02:16,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 46 conjunts are in the unsatisfiable core [2022-12-14 08:02:16,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:02:16,133 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 08:02:16,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:02:16,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:02:16,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 28 [2022-12-14 08:02:16,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:02:16,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:02:16,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 28 [2022-12-14 08:02:16,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-12-14 08:02:16,373 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:02:16,406 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-12-14 08:02:16,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 46 [2022-12-14 08:02:16,442 INFO L321 Elim1Store]: treesize reduction 4, result has 71.4 percent of original size [2022-12-14 08:02:16,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2022-12-14 08:02:16,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-12-14 08:02:16,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-12-14 08:02:16,495 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 27 [2022-12-14 08:02:16,981 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 99 [2022-12-14 08:02:16,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 76 [2022-12-14 08:02:17,015 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-14 08:02:17,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 80 [2022-12-14 08:02:17,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 37 [2022-12-14 08:02:17,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2022-12-14 08:02:17,554 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-14 08:02:17,554 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 220 treesize of output 152 [2022-12-14 08:02:17,570 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 124 [2022-12-14 08:02:17,620 INFO L321 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2022-12-14 08:02:17,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 142 treesize of output 106 [2022-12-14 08:02:17,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 37 [2022-12-14 08:02:17,679 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:02:17,706 INFO L321 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2022-12-14 08:02:17,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 81 treesize of output 45 [2022-12-14 08:02:17,748 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-12-14 08:02:17,749 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 18 [2022-12-14 08:02:17,765 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:02:17,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:02:18,010 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 08:02:18,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 92 treesize of output 104 [2022-12-14 08:02:18,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 78 [2022-12-14 08:02:18,951 INFO L321 Elim1Store]: treesize reduction 15, result has 67.4 percent of original size [2022-12-14 08:02:18,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 489 treesize of output 432 [2022-12-14 08:02:19,317 INFO L321 Elim1Store]: treesize reduction 15, result has 67.4 percent of original size [2022-12-14 08:02:19,317 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 757 treesize of output 612 [2022-12-14 08:02:19,387 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 08:02:19,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 581 treesize of output 546 [2022-12-14 08:02:19,961 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 08:02:19,962 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 3796 treesize of output 3708 [2022-12-14 08:02:20,226 INFO L217 Elim1Store]: Index analysis took 115 ms [2022-12-14 08:02:20,696 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 08:02:20,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 8662 treesize of output 8386 [2022-12-14 08:02:21,208 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 08:02:21,209 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25808 treesize of output 24684 [2022-12-14 08:02:22,584 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 08:02:22,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 22730 treesize of output 21450 [2022-12-14 08:02:25,072 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 08:02:25,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 308 treesize of output 286 [2022-12-14 08:02:26,779 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2022-12-14 08:02:27,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4