./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_partial_init_ground.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a 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_123bec2c-5a5f-45b3-812b-26cb116c0cf6/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_123bec2c-5a5f-45b3-812b-26cb116c0cf6/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_123bec2c-5a5f-45b3-812b-26cb116c0cf6/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_123bec2c-5a5f-45b3-812b-26cb116c0cf6/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_partial_init_ground.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_123bec2c-5a5f-45b3-812b-26cb116c0cf6/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_123bec2c-5a5f-45b3-812b-26cb116c0cf6/bin/utaipan-ByfvJB40ur --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 59d5175089b9a27cfba8f910bda680bc8b61a004048e68040b8cf993cc9cd888 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 23:34:54,818 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 23:34:54,820 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 23:34:54,845 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 23:34:54,846 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 23:34:54,847 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 23:34:54,848 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 23:34:54,850 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 23:34:54,851 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 23:34:54,852 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 23:34:54,853 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 23:34:54,854 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 23:34:54,855 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 23:34:54,856 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 23:34:54,857 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 23:34:54,858 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 23:34:54,859 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 23:34:54,860 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 23:34:54,862 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 23:34:54,864 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 23:34:54,865 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 23:34:54,872 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 23:34:54,876 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 23:34:54,877 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 23:34:54,882 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 23:34:54,887 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 23:34:54,887 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 23:34:54,888 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 23:34:54,889 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 23:34:54,891 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 23:34:54,892 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 23:34:54,893 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 23:34:54,895 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 23:34:54,896 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 23:34:54,897 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 23:34:54,899 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 23:34:54,900 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 23:34:54,900 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 23:34:54,900 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 23:34:54,902 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 23:34:54,903 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 23:34:54,904 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_123bec2c-5a5f-45b3-812b-26cb116c0cf6/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-25 23:34:54,944 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 23:34:54,945 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 23:34:54,945 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 23:34:54,946 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 23:34:54,946 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 23:34:54,947 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 23:34:54,947 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-25 23:34:54,947 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-25 23:34:54,947 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-25 23:34:54,948 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-25 23:34:54,949 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-25 23:34:54,949 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-25 23:34:54,949 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-25 23:34:54,949 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-25 23:34:54,950 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-25 23:34:54,950 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-25 23:34:54,950 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-25 23:34:54,950 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-25 23:34:54,951 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 23:34:54,952 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 23:34:54,952 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 23:34:54,952 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 23:34:54,952 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 23:34:54,953 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 23:34:54,953 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 23:34:54,953 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 23:34:54,953 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 23:34:54,953 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 23:34:54,954 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 23:34:54,954 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 23:34:54,954 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 23:34:54,955 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 23:34:54,955 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:34:54,955 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 23:34:54,955 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-25 23:34:54,956 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 23:34:54,956 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 23:34:54,956 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-25 23:34:54,956 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 23:34:54,957 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 23:34:54,957 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-25 23:34:54,957 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_123bec2c-5a5f-45b3-812b-26cb116c0cf6/bin/utaipan-ByfvJB40ur/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_123bec2c-5a5f-45b3-812b-26cb116c0cf6/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 59d5175089b9a27cfba8f910bda680bc8b61a004048e68040b8cf993cc9cd888 [2022-11-25 23:34:55,221 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 23:34:55,252 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 23:34:55,254 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 23:34:55,255 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 23:34:55,256 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 23:34:55,257 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_123bec2c-5a5f-45b3-812b-26cb116c0cf6/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/array-examples/standard_partial_init_ground.i [2022-11-25 23:34:58,304 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 23:34:58,498 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 23:34:58,499 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_123bec2c-5a5f-45b3-812b-26cb116c0cf6/sv-benchmarks/c/array-examples/standard_partial_init_ground.i [2022-11-25 23:34:58,505 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_123bec2c-5a5f-45b3-812b-26cb116c0cf6/bin/utaipan-ByfvJB40ur/data/b66f50373/66f53913245d4bc198cc4480c9c0e6dd/FLAG4c5ba6816 [2022-11-25 23:34:58,524 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_123bec2c-5a5f-45b3-812b-26cb116c0cf6/bin/utaipan-ByfvJB40ur/data/b66f50373/66f53913245d4bc198cc4480c9c0e6dd [2022-11-25 23:34:58,528 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 23:34:58,530 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 23:34:58,533 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 23:34:58,533 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 23:34:58,537 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 23:34:58,538 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:34:58" (1/1) ... [2022-11-25 23:34:58,539 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4818a55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:34:58, skipping insertion in model container [2022-11-25 23:34:58,539 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:34:58" (1/1) ... [2022-11-25 23:34:58,547 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 23:34:58,570 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 23:34:58,705 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_123bec2c-5a5f-45b3-812b-26cb116c0cf6/sv-benchmarks/c/array-examples/standard_partial_init_ground.i[821,834] [2022-11-25 23:34:58,721 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:34:58,729 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 23:34:58,739 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_123bec2c-5a5f-45b3-812b-26cb116c0cf6/sv-benchmarks/c/array-examples/standard_partial_init_ground.i[821,834] [2022-11-25 23:34:58,747 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:34:58,760 INFO L208 MainTranslator]: Completed translation [2022-11-25 23:34:58,761 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:34:58 WrapperNode [2022-11-25 23:34:58,761 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 23:34:58,762 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 23:34:58,762 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 23:34:58,762 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 23:34:58,769 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:34:58" (1/1) ... [2022-11-25 23:34:58,790 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:34:58" (1/1) ... [2022-11-25 23:34:58,818 INFO L138 Inliner]: procedures = 16, calls = 24, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 82 [2022-11-25 23:34:58,819 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 23:34:58,820 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 23:34:58,820 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 23:34:58,820 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 23:34:58,830 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:34:58" (1/1) ... [2022-11-25 23:34:58,830 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:34:58" (1/1) ... [2022-11-25 23:34:58,835 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:34:58" (1/1) ... [2022-11-25 23:34:58,836 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:34:58" (1/1) ... [2022-11-25 23:34:58,844 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:34:58" (1/1) ... [2022-11-25 23:34:58,858 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:34:58" (1/1) ... [2022-11-25 23:34:58,859 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:34:58" (1/1) ... [2022-11-25 23:34:58,860 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:34:58" (1/1) ... [2022-11-25 23:34:58,862 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 23:34:58,863 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 23:34:58,863 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 23:34:58,863 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 23:34:58,864 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:34:58" (1/1) ... [2022-11-25 23:34:58,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:34:58,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_123bec2c-5a5f-45b3-812b-26cb116c0cf6/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:34:58,904 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_123bec2c-5a5f-45b3-812b-26cb116c0cf6/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 23:34:58,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_123bec2c-5a5f-45b3-812b-26cb116c0cf6/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 23:34:58,956 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 23:34:58,956 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 23:34:58,956 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 23:34:58,956 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 23:34:58,956 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 23:34:58,957 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 23:34:58,957 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 23:34:58,957 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-25 23:34:58,957 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-25 23:34:58,957 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 23:34:59,045 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 23:34:59,049 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 23:34:59,264 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 23:34:59,360 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 23:34:59,360 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-25 23:34:59,383 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:34:59 BoogieIcfgContainer [2022-11-25 23:34:59,383 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 23:34:59,386 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 23:34:59,386 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 23:34:59,389 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 23:34:59,389 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 11:34:58" (1/3) ... [2022-11-25 23:34:59,390 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58196 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:34:59, skipping insertion in model container [2022-11-25 23:34:59,390 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:34:58" (2/3) ... [2022-11-25 23:34:59,391 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58196 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:34:59, skipping insertion in model container [2022-11-25 23:34:59,391 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:34:59" (3/3) ... [2022-11-25 23:34:59,392 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_partial_init_ground.i [2022-11-25 23:34:59,424 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 23:34:59,424 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 23:34:59,488 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 23:34:59,498 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;@5fe7706c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 23:34:59,498 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-25 23:34:59,502 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 23:34:59,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-25 23:34:59,513 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:34:59,514 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:34:59,515 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:34:59,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:34:59,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1629969816, now seen corresponding path program 1 times [2022-11-25 23:34:59,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:34:59,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731806752] [2022-11-25 23:34:59,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:34:59,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:34:59,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:34:59,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:34:59,748 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:34:59,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731806752] [2022-11-25 23:34:59,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731806752] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:34:59,750 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:34:59,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 23:34:59,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380108743] [2022-11-25 23:34:59,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:34:59,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:34:59,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:34:59,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:34:59,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:34:59,787 INFO L87 Difference]: Start difference. First operand has 16 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:34:59,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:34:59,835 INFO L93 Difference]: Finished difference Result 32 states and 45 transitions. [2022-11-25 23:34:59,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:34:59,838 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-25 23:34:59,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:34:59,845 INFO L225 Difference]: With dead ends: 32 [2022-11-25 23:34:59,845 INFO L226 Difference]: Without dead ends: 17 [2022-11-25 23:34:59,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:34:59,851 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:34:59,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 23:34:59,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-11-25 23:34:59,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-11-25 23:34:59,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 23:34:59,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2022-11-25 23:34:59,886 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 8 [2022-11-25 23:34:59,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:34:59,887 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-11-25 23:34:59,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:34:59,887 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2022-11-25 23:34:59,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-25 23:34:59,888 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:34:59,888 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:34:59,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 23:34:59,889 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:34:59,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:34:59,890 INFO L85 PathProgramCache]: Analyzing trace with hash 761335963, now seen corresponding path program 1 times [2022-11-25 23:34:59,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:34:59,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890776264] [2022-11-25 23:34:59,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:34:59,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:34:59,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:35:00,077 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 23:35:00,077 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:35:00,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890776264] [2022-11-25 23:35:00,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890776264] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:35:00,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710350119] [2022-11-25 23:35:00,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:35:00,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:35:00,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_123bec2c-5a5f-45b3-812b-26cb116c0cf6/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:35:00,082 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_123bec2c-5a5f-45b3-812b-26cb116c0cf6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:35:00,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_123bec2c-5a5f-45b3-812b-26cb116c0cf6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 23:35:00,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:35:00,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 23:35:00,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:35:00,212 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 23:35:00,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:35:00,233 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 23:35:00,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710350119] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:35:00,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [609403137] [2022-11-25 23:35:00,251 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-25 23:35:00,252 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:35:00,255 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:35:00,260 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:35:00,261 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:35:00,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:35:00,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:35:00,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:35:00,515 INFO L321 Elim1Store]: treesize reduction 83, result has 23.9 percent of original size [2022-11-25 23:35:00,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 42 [2022-11-25 23:35:00,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:35:00,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:35:00,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:35:00,715 INFO L321 Elim1Store]: treesize reduction 129, result has 17.8 percent of original size [2022-11-25 23:35:00,716 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 55 treesize of output 73 [2022-11-25 23:35:00,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:35:00,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:35:00,828 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-11-25 23:35:01,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:35:01,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:35:01,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:35:01,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:35:01,058 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:35:01,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:35:01,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:35:01,071 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:35:01,132 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-25 23:35:01,133 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 7 case distinctions, treesize of input 374 treesize of output 342 [2022-11-25 23:35:01,358 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:35:01,377 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-25 23:35:01,379 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 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-25 23:35:01,479 INFO L321 Elim1Store]: treesize reduction 32, result has 41.8 percent of original size [2022-11-25 23:35:01,480 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 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 33 [2022-11-25 23:35:01,565 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:35:01,625 INFO L321 Elim1Store]: treesize reduction 72, result has 45.0 percent of original size [2022-11-25 23:35:01,626 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 2 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 75 [2022-11-25 23:35:01,694 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 26 for LOIs [2022-11-25 23:35:01,729 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:35:03,649 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '156#(and (exists ((|v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_main_~#C~0#1.base_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_main_~j~0#1_BEFORE_CALL_1| Int)) (and (<= 100000 |v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_1|) (= (ite (<= (+ (select (select |#memory_int| |v_ULTIMATE.start_main_~#C~0#1.base_BEFORE_CALL_1|) 0) |v_ULTIMATE.start_main_~j~0#1_BEFORE_CALL_1|) |v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_1|) 1 0) |__VERIFIER_assert_#in~cond|) (<= 0 |v_ULTIMATE.start_main_~#C~0#1.base_BEFORE_CALL_1|) (< 0 |v_ULTIMATE.start_main_~j~0#1_BEFORE_CALL_1|))) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:35:03,649 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:35:03,649 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:35:03,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-25 23:35:03,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136440507] [2022-11-25 23:35:03,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:35:03,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 23:35:03,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:35:03,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 23:35:03,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-11-25 23:35:03,652 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:35:03,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:35:03,727 INFO L93 Difference]: Finished difference Result 37 states and 50 transitions. [2022-11-25 23:35:03,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 23:35:03,729 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-25 23:35:03,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:35:03,729 INFO L225 Difference]: With dead ends: 37 [2022-11-25 23:35:03,730 INFO L226 Difference]: Without dead ends: 23 [2022-11-25 23:35:03,732 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-11-25 23:35:03,738 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:35:03,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 23:35:03,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-11-25 23:35:03,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-11-25 23:35:03,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 23:35:03,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2022-11-25 23:35:03,751 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 10 [2022-11-25 23:35:03,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:35:03,751 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2022-11-25 23:35:03,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:35:03,752 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2022-11-25 23:35:03,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-25 23:35:03,752 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:35:03,752 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:35:03,758 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_123bec2c-5a5f-45b3-812b-26cb116c0cf6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-25 23:35:03,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_123bec2c-5a5f-45b3-812b-26cb116c0cf6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:35:03,958 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:35:03,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:35:03,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1625783208, now seen corresponding path program 2 times [2022-11-25 23:35:03,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:35:03,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086706685] [2022-11-25 23:35:03,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:35:03,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:35:04,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:35:04,261 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 23:35:04,262 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:35:04,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086706685] [2022-11-25 23:35:04,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086706685] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:35:04,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067205949] [2022-11-25 23:35:04,263 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 23:35:04,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:35:04,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_123bec2c-5a5f-45b3-812b-26cb116c0cf6/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:35:04,264 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_123bec2c-5a5f-45b3-812b-26cb116c0cf6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:35:04,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_123bec2c-5a5f-45b3-812b-26cb116c0cf6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 23:35:04,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-25 23:35:04,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:35:04,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 23:35:04,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:35:04,440 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 23:35:04,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:35:04,519 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 23:35:04,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067205949] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:35:04,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1715884616] [2022-11-25 23:35:04,530 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-25 23:35:04,530 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:35:04,530 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:35:04,531 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:35:04,531 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:35:04,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:35:04,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:35:04,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:35:04,623 INFO L321 Elim1Store]: treesize reduction 83, result has 23.9 percent of original size [2022-11-25 23:35:04,623 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 42 [2022-11-25 23:35:04,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:35:04,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:35:04,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:35:04,725 INFO L321 Elim1Store]: treesize reduction 129, result has 17.8 percent of original size [2022-11-25 23:35:04,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 55 treesize of output 73 [2022-11-25 23:35:04,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:35:04,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:35:04,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-25 23:35:04,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:35:04,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:35:04,902 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:35:04,905 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:35:04,905 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:35:04,983 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-25 23:35:04,986 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 9 case distinctions, treesize of input 354 treesize of output 344 [2022-11-25 23:35:05,424 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:35:05,439 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-25 23:35:05,439 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 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-25 23:35:05,523 INFO L321 Elim1Store]: treesize reduction 32, result has 41.8 percent of original size [2022-11-25 23:35:05,524 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 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 33 [2022-11-25 23:35:05,574 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:35:05,629 INFO L321 Elim1Store]: treesize reduction 72, result has 45.0 percent of original size [2022-11-25 23:35:05,629 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 2 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 75 [2022-11-25 23:35:05,669 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 26 for LOIs [2022-11-25 23:35:05,692 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:35:07,380 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '363#(and (exists ((|v_ULTIMATE.start_main_~#C~0#1.base_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_main_~j~0#1_BEFORE_CALL_2| Int)) (and (<= 0 |v_ULTIMATE.start_main_~#C~0#1.base_BEFORE_CALL_2|) (< 0 |v_ULTIMATE.start_main_~j~0#1_BEFORE_CALL_2|) (<= 100000 |v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_2|) (= (ite (<= (+ (select (select |#memory_int| |v_ULTIMATE.start_main_~#C~0#1.base_BEFORE_CALL_2|) 0) |v_ULTIMATE.start_main_~j~0#1_BEFORE_CALL_2|) |v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_2|) 1 0) |__VERIFIER_assert_#in~cond|))) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:35:07,380 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:35:07,380 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:35:07,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-25 23:35:07,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775342733] [2022-11-25 23:35:07,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:35:07,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 23:35:07,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:35:07,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 23:35:07,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2022-11-25 23:35:07,382 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 12 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:35:07,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:35:07,477 INFO L93 Difference]: Finished difference Result 52 states and 71 transitions. [2022-11-25 23:35:07,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 23:35:07,477 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 12 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-25 23:35:07,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:35:07,478 INFO L225 Difference]: With dead ends: 52 [2022-11-25 23:35:07,478 INFO L226 Difference]: Without dead ends: 35 [2022-11-25 23:35:07,479 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2022-11-25 23:35:07,480 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:35:07,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:35:07,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-11-25 23:35:07,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-11-25 23:35:07,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 31 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 23:35:07,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2022-11-25 23:35:07,485 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 16 [2022-11-25 23:35:07,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:35:07,486 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2022-11-25 23:35:07,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 12 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:35:07,486 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2022-11-25 23:35:07,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-25 23:35:07,487 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:35:07,487 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:35:07,495 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_123bec2c-5a5f-45b3-812b-26cb116c0cf6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 23:35:07,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_123bec2c-5a5f-45b3-812b-26cb116c0cf6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:35:07,693 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:35:07,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:35:07,694 INFO L85 PathProgramCache]: Analyzing trace with hash -487711352, now seen corresponding path program 3 times [2022-11-25 23:35:07,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:35:07,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209770724] [2022-11-25 23:35:07,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:35:07,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:35:07,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:35:08,029 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-25 23:35:08,030 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:35:08,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209770724] [2022-11-25 23:35:08,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209770724] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:35:08,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76326022] [2022-11-25 23:35:08,031 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 23:35:08,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:35:08,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_123bec2c-5a5f-45b3-812b-26cb116c0cf6/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:35:08,033 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_123bec2c-5a5f-45b3-812b-26cb116c0cf6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:35:08,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_123bec2c-5a5f-45b3-812b-26cb116c0cf6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 23:35:08,196 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 23:35:08,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:35:08,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 23:35:08,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:35:08,236 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-25 23:35:08,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:35:08,448 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-25 23:35:08,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76326022] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:35:08,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2120515008] [2022-11-25 23:35:08,450 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-25 23:35:08,450 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:35:08,451 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:35:08,451 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:35:08,451 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:35:08,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:35:08,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:35:08,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:35:08,543 INFO L321 Elim1Store]: treesize reduction 129, result has 17.8 percent of original size [2022-11-25 23:35:08,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 55 treesize of output 73 [2022-11-25 23:35:08,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:35:08,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:35:08,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:35:08,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 32 [2022-11-25 23:35:08,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:35:08,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:35:08,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-25 23:35:08,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:35:08,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:35:08,715 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:35:08,716 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:35:08,716 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:35:08,783 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-25 23:35:08,783 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 9 case distinctions, treesize of input 354 treesize of output 344 [2022-11-25 23:35:09,234 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:35:09,246 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-25 23:35:09,246 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 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-25 23:35:09,271 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:35:09,273 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:35:09,299 INFO L321 Elim1Store]: treesize reduction 46, result has 41.8 percent of original size [2022-11-25 23:35:09,300 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 2 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 45 [2022-11-25 23:35:09,340 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:35:09,394 INFO L321 Elim1Store]: treesize reduction 72, result has 45.0 percent of original size [2022-11-25 23:35:09,395 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 2 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 75 [2022-11-25 23:35:09,539 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:35:09,592 INFO L321 Elim1Store]: treesize reduction 72, result has 45.0 percent of original size [2022-11-25 23:35:09,593 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 2 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 75 [2022-11-25 23:35:09,639 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 26 for LOIs [2022-11-25 23:35:09,673 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:35:11,678 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '708#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (exists ((|v_ULTIMATE.start_main_~#C~0#1.base_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_main_~j~0#1_BEFORE_CALL_3| Int)) (and (<= 100000 |v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_3|) (< 0 |v_ULTIMATE.start_main_~j~0#1_BEFORE_CALL_3|) (= |__VERIFIER_assert_#in~cond| (ite (<= (+ (select (select |#memory_int| |v_ULTIMATE.start_main_~#C~0#1.base_BEFORE_CALL_3|) 0) |v_ULTIMATE.start_main_~j~0#1_BEFORE_CALL_3|) |v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_3|) 1 0)) (<= 0 |v_ULTIMATE.start_main_~#C~0#1.base_BEFORE_CALL_3|))) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:35:11,678 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:35:11,679 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:35:11,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-11-25 23:35:11,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909596410] [2022-11-25 23:35:11,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:35:11,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-25 23:35:11,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:35:11,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-25 23:35:11,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=671, Unknown=0, NotChecked=0, Total=992 [2022-11-25 23:35:11,681 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 25 states, 25 states have (on average 1.28) internal successors, (32), 24 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:35:11,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:35:11,861 INFO L93 Difference]: Finished difference Result 82 states and 113 transitions. [2022-11-25 23:35:11,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-25 23:35:11,862 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.28) internal successors, (32), 24 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-11-25 23:35:11,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:35:11,863 INFO L225 Difference]: With dead ends: 82 [2022-11-25 23:35:11,863 INFO L226 Difference]: Without dead ends: 59 [2022-11-25 23:35:11,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=321, Invalid=671, Unknown=0, NotChecked=0, Total=992 [2022-11-25 23:35:11,865 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:35:11,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 71 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 23:35:11,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-11-25 23:35:11,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2022-11-25 23:35:11,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 55 states have (on average 1.0727272727272728) internal successors, (59), 55 states have internal predecessors, (59), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 23:35:11,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2022-11-25 23:35:11,873 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 28 [2022-11-25 23:35:11,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:35:11,874 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2022-11-25 23:35:11,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.28) internal successors, (32), 24 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:35:11,874 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2022-11-25 23:35:11,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-25 23:35:11,875 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:35:11,876 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:35:11,892 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_123bec2c-5a5f-45b3-812b-26cb116c0cf6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 23:35:12,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_123bec2c-5a5f-45b3-812b-26cb116c0cf6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:35:12,081 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:35:12,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:35:12,081 INFO L85 PathProgramCache]: Analyzing trace with hash 1925937480, now seen corresponding path program 4 times [2022-11-25 23:35:12,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:35:12,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710125797] [2022-11-25 23:35:12,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:35:12,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:35:12,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:35:13,123 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-11-25 23:35:13,123 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:35:13,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710125797] [2022-11-25 23:35:13,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710125797] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:35:13,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099233334] [2022-11-25 23:35:13,124 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 23:35:13,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:35:13,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_123bec2c-5a5f-45b3-812b-26cb116c0cf6/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:35:13,125 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_123bec2c-5a5f-45b3-812b-26cb116c0cf6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:35:13,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_123bec2c-5a5f-45b3-812b-26cb116c0cf6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 23:35:13,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:35:13,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 609 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-25 23:35:13,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:35:13,405 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-11-25 23:35:13,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:35:14,278 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-11-25 23:35:14,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099233334] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:35:14,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1234776690] [2022-11-25 23:35:14,280 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-25 23:35:14,280 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:35:14,281 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:35:14,281 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:35:14,281 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:35:14,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:35:14,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:35:14,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:35:14,382 INFO L321 Elim1Store]: treesize reduction 129, result has 17.8 percent of original size [2022-11-25 23:35:14,383 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 55 treesize of output 73 [2022-11-25 23:35:14,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:35:14,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:35:14,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:35:14,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 32 [2022-11-25 23:35:14,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:35:14,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:35:14,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-25 23:35:14,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:35:14,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:35:14,541 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:35:14,542 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:35:14,543 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:35:14,614 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-25 23:35:14,614 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 9 case distinctions, treesize of input 354 treesize of output 344 [2022-11-25 23:35:15,012 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:35:15,024 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-25 23:35:15,024 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 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-25 23:35:15,071 INFO L321 Elim1Store]: treesize reduction 32, result has 41.8 percent of original size [2022-11-25 23:35:15,071 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 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 33 [2022-11-25 23:35:15,109 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:35:15,153 INFO L321 Elim1Store]: treesize reduction 72, result has 45.0 percent of original size [2022-11-25 23:35:15,154 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 2 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 75 [2022-11-25 23:35:15,189 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 26 for LOIs [2022-11-25 23:35:15,205 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:35:17,045 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1329#(and (exists ((|v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_main_~#C~0#1.base_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_main_~j~0#1_BEFORE_CALL_4| Int)) (and (< 0 |v_ULTIMATE.start_main_~j~0#1_BEFORE_CALL_4|) (<= 0 |v_ULTIMATE.start_main_~#C~0#1.base_BEFORE_CALL_4|) (<= 100000 |v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_4|) (= |__VERIFIER_assert_#in~cond| (ite (<= (+ (select (select |#memory_int| |v_ULTIMATE.start_main_~#C~0#1.base_BEFORE_CALL_4|) 0) |v_ULTIMATE.start_main_~j~0#1_BEFORE_CALL_4|) |v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_4|) 1 0)))) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:35:17,046 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:35:17,046 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:35:17,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2022-11-25 23:35:17,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220929229] [2022-11-25 23:35:17,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:35:17,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-25 23:35:17,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:35:17,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-25 23:35:17,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1197, Invalid=1883, Unknown=0, NotChecked=0, Total=3080 [2022-11-25 23:35:17,050 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand has 49 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 48 states have internal predecessors, (56), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:35:17,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:35:17,406 INFO L93 Difference]: Finished difference Result 142 states and 197 transitions. [2022-11-25 23:35:17,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-25 23:35:17,407 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 48 states have internal predecessors, (56), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-11-25 23:35:17,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:35:17,408 INFO L225 Difference]: With dead ends: 142 [2022-11-25 23:35:17,409 INFO L226 Difference]: Without dead ends: 107 [2022-11-25 23:35:17,410 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1197, Invalid=1883, Unknown=0, NotChecked=0, Total=3080 [2022-11-25 23:35:17,411 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:35:17,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 61 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 23:35:17,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-11-25 23:35:17,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2022-11-25 23:35:17,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 103 states have (on average 1.0388349514563107) internal successors, (107), 103 states have internal predecessors, (107), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 23:35:17,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 111 transitions. [2022-11-25 23:35:17,425 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 111 transitions. Word has length 52 [2022-11-25 23:35:17,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:35:17,425 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 111 transitions. [2022-11-25 23:35:17,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 48 states have internal predecessors, (56), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:35:17,426 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 111 transitions. [2022-11-25 23:35:17,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-11-25 23:35:17,428 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:35:17,429 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:35:17,440 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_123bec2c-5a5f-45b3-812b-26cb116c0cf6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 23:35:17,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_123bec2c-5a5f-45b3-812b-26cb116c0cf6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:35:17,635 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:35:17,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:35:17,636 INFO L85 PathProgramCache]: Analyzing trace with hash 633245896, now seen corresponding path program 5 times [2022-11-25 23:35:17,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:35:17,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888041074] [2022-11-25 23:35:17,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:35:17,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:35:17,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:35:21,162 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2022-11-25 23:35:21,162 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:35:21,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888041074] [2022-11-25 23:35:21,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888041074] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:35:21,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694984833] [2022-11-25 23:35:21,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 23:35:21,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:35:21,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_123bec2c-5a5f-45b3-812b-26cb116c0cf6/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:35:21,165 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_123bec2c-5a5f-45b3-812b-26cb116c0cf6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:35:21,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_123bec2c-5a5f-45b3-812b-26cb116c0cf6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process