./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-acceleration/array_4.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 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_1e1927fd-cc25-4f5f-8a03-ae5eb76b4e71/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1927fd-cc25-4f5f-8a03-ae5eb76b4e71/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1927fd-cc25-4f5f-8a03-ae5eb76b4e71/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1927fd-cc25-4f5f-8a03-ae5eb76b4e71/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-acceleration/array_4.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1927fd-cc25-4f5f-8a03-ae5eb76b4e71/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1927fd-cc25-4f5f-8a03-ae5eb76b4e71/bin/utaipan-Q6hlc19bkW --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 e8c27e61ac5d5a22c0e00a5dbac1b872460567877a501387ed9d5bda89096498 --- 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-4e7fbc6 [2022-11-23 14:42:40,807 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 14:42:40,809 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 14:42:40,849 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 14:42:40,850 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 14:42:40,853 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 14:42:40,856 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 14:42:40,858 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 14:42:40,860 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 14:42:40,865 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 14:42:40,866 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 14:42:40,868 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 14:42:40,869 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 14:42:40,871 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 14:42:40,873 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 14:42:40,875 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 14:42:40,876 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 14:42:40,877 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 14:42:40,878 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 14:42:40,884 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 14:42:40,886 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 14:42:40,888 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 14:42:40,889 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 14:42:40,890 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 14:42:40,899 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 14:42:40,900 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 14:42:40,900 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 14:42:40,902 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 14:42:40,903 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 14:42:40,905 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 14:42:40,905 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 14:42:40,906 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 14:42:40,908 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 14:42:40,908 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 14:42:40,910 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 14:42:40,910 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 14:42:40,911 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 14:42:40,911 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 14:42:40,912 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 14:42:40,913 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 14:42:40,914 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 14:42:40,915 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1927fd-cc25-4f5f-8a03-ae5eb76b4e71/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-23 14:42:40,973 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 14:42:40,973 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 14:42:40,974 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 14:42:40,974 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 14:42:40,975 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 14:42:40,975 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 14:42:40,975 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 14:42:40,976 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 14:42:40,976 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 14:42:40,976 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 14:42:40,977 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 14:42:40,977 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 14:42:40,978 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 14:42:40,978 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 14:42:40,978 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 14:42:40,978 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 14:42:40,979 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 14:42:40,979 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 14:42:40,979 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 14:42:40,980 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 14:42:40,980 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 14:42:40,980 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 14:42:40,980 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 14:42:40,981 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 14:42:40,981 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 14:42:40,981 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 14:42:40,982 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 14:42:40,982 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 14:42:40,982 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 14:42:40,982 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 14:42:40,983 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 14:42:40,983 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 14:42:40,983 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:42:40,984 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 14:42:40,984 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 14:42:40,984 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 14:42:40,984 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 14:42:40,985 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 14:42:40,985 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 14:42:40,985 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 14:42:40,985 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 14:42:40,986 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_1e1927fd-cc25-4f5f-8a03-ae5eb76b4e71/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1927fd-cc25-4f5f-8a03-ae5eb76b4e71/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e8c27e61ac5d5a22c0e00a5dbac1b872460567877a501387ed9d5bda89096498 [2022-11-23 14:42:41,275 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 14:42:41,304 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 14:42:41,307 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 14:42:41,308 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 14:42:41,309 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 14:42:41,310 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1927fd-cc25-4f5f-8a03-ae5eb76b4e71/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/loop-acceleration/array_4.i [2022-11-23 14:42:44,376 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 14:42:44,570 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 14:42:44,571 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1927fd-cc25-4f5f-8a03-ae5eb76b4e71/sv-benchmarks/c/loop-acceleration/array_4.i [2022-11-23 14:42:44,577 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1927fd-cc25-4f5f-8a03-ae5eb76b4e71/bin/utaipan-Q6hlc19bkW/data/b7eda749d/84857be34dd24bb39e9edcb69da282ee/FLAG0e460e065 [2022-11-23 14:42:44,592 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1927fd-cc25-4f5f-8a03-ae5eb76b4e71/bin/utaipan-Q6hlc19bkW/data/b7eda749d/84857be34dd24bb39e9edcb69da282ee [2022-11-23 14:42:44,594 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 14:42:44,596 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 14:42:44,597 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 14:42:44,598 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 14:42:44,601 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 14:42:44,602 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:42:44" (1/1) ... [2022-11-23 14:42:44,603 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f8103c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:42:44, skipping insertion in model container [2022-11-23 14:42:44,603 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:42:44" (1/1) ... [2022-11-23 14:42:44,610 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 14:42:44,624 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 14:42:44,769 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_1e1927fd-cc25-4f5f-8a03-ae5eb76b4e71/sv-benchmarks/c/loop-acceleration/array_4.i[848,861] [2022-11-23 14:42:44,781 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:42:44,789 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 14:42:44,800 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_1e1927fd-cc25-4f5f-8a03-ae5eb76b4e71/sv-benchmarks/c/loop-acceleration/array_4.i[848,861] [2022-11-23 14:42:44,805 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:42:44,819 INFO L208 MainTranslator]: Completed translation [2022-11-23 14:42:44,819 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:42:44 WrapperNode [2022-11-23 14:42:44,819 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 14:42:44,821 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 14:42:44,821 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 14:42:44,821 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 14:42:44,828 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:42:44" (1/1) ... [2022-11-23 14:42:44,833 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:42:44" (1/1) ... [2022-11-23 14:42:44,847 INFO L138 Inliner]: procedures = 16, calls = 12, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 43 [2022-11-23 14:42:44,847 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 14:42:44,848 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 14:42:44,848 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 14:42:44,848 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 14:42:44,855 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:42:44" (1/1) ... [2022-11-23 14:42:44,855 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:42:44" (1/1) ... [2022-11-23 14:42:44,858 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:42:44" (1/1) ... [2022-11-23 14:42:44,858 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:42:44" (1/1) ... [2022-11-23 14:42:44,862 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:42:44" (1/1) ... [2022-11-23 14:42:44,866 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:42:44" (1/1) ... [2022-11-23 14:42:44,867 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:42:44" (1/1) ... [2022-11-23 14:42:44,868 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:42:44" (1/1) ... [2022-11-23 14:42:44,870 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 14:42:44,871 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 14:42:44,871 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 14:42:44,871 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 14:42:44,872 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:42:44" (1/1) ... [2022-11-23 14:42:44,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:42:44,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1927fd-cc25-4f5f-8a03-ae5eb76b4e71/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:42:44,916 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1927fd-cc25-4f5f-8a03-ae5eb76b4e71/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 14:42:44,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1927fd-cc25-4f5f-8a03-ae5eb76b4e71/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 14:42:44,972 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 14:42:44,972 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 14:42:44,973 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 14:42:44,973 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 14:42:44,973 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 14:42:44,973 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 14:42:44,973 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 14:42:44,974 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 14:42:45,048 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 14:42:45,050 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 14:42:45,163 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 14:42:45,190 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 14:42:45,190 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-23 14:42:45,193 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:42:45 BoogieIcfgContainer [2022-11-23 14:42:45,193 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 14:42:45,196 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 14:42:45,196 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 14:42:45,200 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 14:42:45,200 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:42:44" (1/3) ... [2022-11-23 14:42:45,201 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37051fd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:42:45, skipping insertion in model container [2022-11-23 14:42:45,201 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:42:44" (2/3) ... [2022-11-23 14:42:45,201 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37051fd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:42:45, skipping insertion in model container [2022-11-23 14:42:45,201 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:42:45" (3/3) ... [2022-11-23 14:42:45,203 INFO L112 eAbstractionObserver]: Analyzing ICFG array_4.i [2022-11-23 14:42:45,223 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 14:42:45,224 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 14:42:45,270 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 14:42:45,277 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;@61051812, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 14:42:45,277 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 14:42:45,281 INFO L276 IsEmpty]: Start isEmpty. Operand has 10 states, 8 states have (on average 1.625) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:42:45,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-23 14:42:45,288 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:42:45,288 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-23 14:42:45,289 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:42:45,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:42:45,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1984346455, now seen corresponding path program 1 times [2022-11-23 14:42:45,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:42:45,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595593316] [2022-11-23 14:42:45,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:42:45,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:42:45,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:42:45,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:42:45,448 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:42:45,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595593316] [2022-11-23 14:42:45,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595593316] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:42:45,449 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:42:45,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 14:42:45,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390560501] [2022-11-23 14:42:45,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:42:45,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-23 14:42:45,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:42:45,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-23 14:42:45,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-23 14:42:45,485 INFO L87 Difference]: Start difference. First operand has 10 states, 8 states have (on average 1.625) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:42:45,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:42:45,511 INFO L93 Difference]: Finished difference Result 16 states and 19 transitions. [2022-11-23 14:42:45,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-23 14:42:45,514 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-23 14:42:45,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:42:45,521 INFO L225 Difference]: With dead ends: 16 [2022-11-23 14:42:45,521 INFO L226 Difference]: Without dead ends: 8 [2022-11-23 14:42:45,524 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-23 14:42:45,527 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:42:45,528 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:42:45,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2022-11-23 14:42:45,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2022-11-23 14:42:45,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:42:45,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2022-11-23 14:42:45,583 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2022-11-23 14:42:45,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:42:45,591 INFO L495 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2022-11-23 14:42:45,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:42:45,592 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2022-11-23 14:42:45,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-23 14:42:45,592 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:42:45,592 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:42:45,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 14:42:45,593 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:42:45,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:42:45,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1393750887, now seen corresponding path program 1 times [2022-11-23 14:42:45,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:42:45,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527752753] [2022-11-23 14:42:45,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:42:45,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:42:45,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:42:45,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:42:45,742 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:42:45,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527752753] [2022-11-23 14:42:45,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527752753] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:42:45,743 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:42:45,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 14:42:45,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539779171] [2022-11-23 14:42:45,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:42:45,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:42:45,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:42:45,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:42:45,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:42:45,751 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:42:45,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:42:45,791 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2022-11-23 14:42:45,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:42:45,792 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-23 14:42:45,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:42:45,793 INFO L225 Difference]: With dead ends: 21 [2022-11-23 14:42:45,793 INFO L226 Difference]: Without dead ends: 15 [2022-11-23 14:42:45,793 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 [2022-11-23 14:42:45,795 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 5 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:42:45,796 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 6 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:42:45,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-11-23 14:42:45,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 9. [2022-11-23 14:42:45,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:42:45,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2022-11-23 14:42:45,799 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 7 [2022-11-23 14:42:45,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:42:45,800 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2022-11-23 14:42:45,800 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:42:45,800 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2022-11-23 14:42:45,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-23 14:42:45,801 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:42:45,801 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:42:45,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 14:42:45,801 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:42:45,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:42:45,802 INFO L85 PathProgramCache]: Analyzing trace with hash -373538295, now seen corresponding path program 1 times [2022-11-23 14:42:45,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:42:45,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563491786] [2022-11-23 14:42:45,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:42:45,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:42:45,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:42:45,926 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:42:45,926 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:42:45,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563491786] [2022-11-23 14:42:45,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563491786] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:42:45,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807978855] [2022-11-23 14:42:45,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:42:45,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:42:45,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1927fd-cc25-4f5f-8a03-ae5eb76b4e71/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:42:45,932 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1927fd-cc25-4f5f-8a03-ae5eb76b4e71/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:42:45,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1927fd-cc25-4f5f-8a03-ae5eb76b4e71/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 14:42:46,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:42:46,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 14:42:46,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:42:46,126 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:42:46,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:42:46,171 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:42:46,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807978855] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:42:46,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1594472637] [2022-11-23 14:42:46,196 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-23 14:42:46,196 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:42:46,202 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:42:46,208 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:42:46,209 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:42:46,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:46,314 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 14:42:46,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-11-23 14:42:46,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:46,350 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:42:46,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-23 14:42:46,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:46,414 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-23 14:42:46,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:46,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:46,586 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-23 14:42:46,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 196 treesize of output 184 [2022-11-23 14:42:46,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-23 14:42:46,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 14:42:46,782 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:42:46,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1594472637] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:42:46,942 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:42:46,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [3, 3, 3] total 11 [2022-11-23 14:42:46,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077767163] [2022-11-23 14:42:46,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:42:46,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 14:42:46,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:42:46,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 14:42:46,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=73, Unknown=0, NotChecked=0, Total=132 [2022-11-23 14:42:46,947 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand has 7 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:42:47,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:42:47,004 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2022-11-23 14:42:47,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 14:42:47,005 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-23 14:42:47,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:42:47,006 INFO L225 Difference]: With dead ends: 15 [2022-11-23 14:42:47,006 INFO L226 Difference]: Without dead ends: 11 [2022-11-23 14:42:47,009 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=73, Unknown=0, NotChecked=0, Total=132 [2022-11-23 14:42:47,013 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 9 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:42:47,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 5 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:42:47,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2022-11-23 14:42:47,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2022-11-23 14:42:47,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:42:47,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2022-11-23 14:42:47,025 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 8 [2022-11-23 14:42:47,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:42:47,025 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2022-11-23 14:42:47,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:42:47,026 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2022-11-23 14:42:47,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-23 14:42:47,026 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:42:47,027 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:42:47,035 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1927fd-cc25-4f5f-8a03-ae5eb76b4e71/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-23 14:42:47,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1927fd-cc25-4f5f-8a03-ae5eb76b4e71/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:42:47,235 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:42:47,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:42:47,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1754148148, now seen corresponding path program 1 times [2022-11-23 14:42:47,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:42:47,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517259149] [2022-11-23 14:42:47,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:42:47,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:42:47,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:42:47,390 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 14:42:47,390 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:42:47,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517259149] [2022-11-23 14:42:47,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517259149] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:42:47,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547089639] [2022-11-23 14:42:47,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:42:47,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:42:47,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1927fd-cc25-4f5f-8a03-ae5eb76b4e71/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:42:47,393 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1927fd-cc25-4f5f-8a03-ae5eb76b4e71/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:42:47,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1927fd-cc25-4f5f-8a03-ae5eb76b4e71/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 14:42:47,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:42:47,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 14:42:47,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:42:47,496 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 14:42:47,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:42:47,517 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 14:42:47,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547089639] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:42:47,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1652037895] [2022-11-23 14:42:47,523 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-23 14:42:47,524 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:42:47,524 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:42:47,525 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:42:47,525 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:42:47,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:47,577 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:42:47,578 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-23 14:42:47,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:47,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-23 14:42:47,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:47,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-23 14:42:47,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:47,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:47,733 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-23 14:42:47,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 196 treesize of output 184 [2022-11-23 14:42:47,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-23 14:42:47,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 14:42:47,919 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:42:48,228 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '235#(and (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= |ULTIMATE.start_main_~i~0#1| 1024) 1 0)) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 14:42:48,229 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:42:48,229 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:42:48,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-23 14:42:48,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215867678] [2022-11-23 14:42:48,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:42:48,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 14:42:48,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:42:48,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 14:42:48,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-11-23 14:42:48,231 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:42:48,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:42:48,277 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2022-11-23 14:42:48,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 14:42:48,277 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-23 14:42:48,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:42:48,278 INFO L225 Difference]: With dead ends: 40 [2022-11-23 14:42:48,278 INFO L226 Difference]: Without dead ends: 32 [2022-11-23 14:42:48,279 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-11-23 14:42:48,280 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 18 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:42:48,280 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 15 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:42:48,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-23 14:42:48,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 14. [2022-11-23 14:42:48,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:42:48,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2022-11-23 14:42:48,288 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2022-11-23 14:42:48,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:42:48,289 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2022-11-23 14:42:48,289 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:42:48,290 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2022-11-23 14:42:48,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-23 14:42:48,291 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:42:48,291 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:42:48,301 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1927fd-cc25-4f5f-8a03-ae5eb76b4e71/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 14:42:48,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1927fd-cc25-4f5f-8a03-ae5eb76b4e71/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:42:48,496 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:42:48,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:42:48,497 INFO L85 PathProgramCache]: Analyzing trace with hash -680716964, now seen corresponding path program 2 times [2022-11-23 14:42:48,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:42:48,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199741447] [2022-11-23 14:42:48,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:42:48,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:42:48,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:42:48,667 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 14:42:48,668 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:42:48,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199741447] [2022-11-23 14:42:48,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199741447] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:42:48,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221890554] [2022-11-23 14:42:48,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:42:48,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:42:48,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1927fd-cc25-4f5f-8a03-ae5eb76b4e71/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:42:48,670 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1927fd-cc25-4f5f-8a03-ae5eb76b4e71/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:42:48,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1927fd-cc25-4f5f-8a03-ae5eb76b4e71/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 14:42:48,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-23 14:42:48,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:42:48,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 14:42:48,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:42:48,775 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 14:42:48,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:42:48,805 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 14:42:48,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221890554] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:42:48,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [369254907] [2022-11-23 14:42:48,808 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-23 14:42:48,808 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:42:48,808 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:42:48,808 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:42:48,809 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:42:48,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:48,841 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:42:48,842 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-23 14:42:48,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:48,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-23 14:42:48,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:48,890 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-23 14:42:48,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:48,957 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:42:48,991 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-23 14:42:48,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 186 treesize of output 185 [2022-11-23 14:42:49,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-23 14:42:49,113 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 14:42:49,176 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:42:49,445 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '394#(and (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= |ULTIMATE.start_main_~i~0#1| 1024) 1 0)) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 14:42:49,445 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:42:49,445 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:42:49,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-11-23 14:42:49,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278201859] [2022-11-23 14:42:49,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:42:49,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-23 14:42:49,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:42:49,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-23 14:42:49,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-11-23 14:42:49,447 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:42:49,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:42:49,517 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2022-11-23 14:42:49,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 14:42:49,517 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-23 14:42:49,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:42:49,519 INFO L225 Difference]: With dead ends: 28 [2022-11-23 14:42:49,519 INFO L226 Difference]: Without dead ends: 20 [2022-11-23 14:42:49,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-11-23 14:42:49,520 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 7 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:42:49,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 11 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:42:49,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-11-23 14:42:49,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-11-23 14:42:49,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:42:49,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2022-11-23 14:42:49,542 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 13 [2022-11-23 14:42:49,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:42:49,542 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2022-11-23 14:42:49,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:42:49,543 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2022-11-23 14:42:49,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-23 14:42:49,543 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:42:49,543 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2022-11-23 14:42:49,551 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1927fd-cc25-4f5f-8a03-ae5eb76b4e71/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 14:42:49,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1927fd-cc25-4f5f-8a03-ae5eb76b4e71/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:42:49,748 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:42:49,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:42:49,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1146847013, now seen corresponding path program 3 times [2022-11-23 14:42:49,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:42:49,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446461506] [2022-11-23 14:42:49,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:42:49,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:42:49,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:42:49,925 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-23 14:42:49,925 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:42:49,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446461506] [2022-11-23 14:42:49,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446461506] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:42:49,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891341904] [2022-11-23 14:42:49,928 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 14:42:49,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:42:49,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1927fd-cc25-4f5f-8a03-ae5eb76b4e71/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:42:49,931 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1927fd-cc25-4f5f-8a03-ae5eb76b4e71/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:42:49,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1927fd-cc25-4f5f-8a03-ae5eb76b4e71/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 14:42:50,004 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 14:42:50,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:42:50,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 14:42:50,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:42:50,024 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-23 14:42:50,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:42:50,082 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-23 14:42:50,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891341904] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:42:50,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1086128533] [2022-11-23 14:42:50,085 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-23 14:42:50,085 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:42:50,085 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:42:50,086 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:42:50,086 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:42:50,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:50,113 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:42:50,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-23 14:42:50,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:50,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-23 14:42:50,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:50,146 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-23 14:42:50,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:50,198 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:42:50,221 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-23 14:42:50,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 186 treesize of output 185 [2022-11-23 14:42:50,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-23 14:42:50,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 14:42:50,364 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:42:50,718 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '594#(and (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= |ULTIMATE.start_main_~i~0#1| 1024) 1 0)) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 14:42:50,719 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:42:50,719 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:42:50,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-23 14:42:50,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392504631] [2022-11-23 14:42:50,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:42:50,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-23 14:42:50,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:42:50,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-23 14:42:50,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2022-11-23 14:42:50,721 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:42:50,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:42:50,824 INFO L93 Difference]: Finished difference Result 76 states and 83 transitions. [2022-11-23 14:42:50,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-23 14:42:50,825 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-23 14:42:50,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:42:50,826 INFO L225 Difference]: With dead ends: 76 [2022-11-23 14:42:50,826 INFO L226 Difference]: Without dead ends: 62 [2022-11-23 14:42:50,827 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2022-11-23 14:42:50,828 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 73 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:42:50,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 27 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:42:50,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-11-23 14:42:50,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 26. [2022-11-23 14:42:50,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.08) internal successors, (27), 25 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:42:50,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2022-11-23 14:42:50,843 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 19 [2022-11-23 14:42:50,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:42:50,844 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2022-11-23 14:42:50,844 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:42:50,844 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2022-11-23 14:42:50,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-23 14:42:50,845 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:42:50,845 INFO L195 NwaCegarLoop]: trace histogram [10, 5, 4, 1, 1, 1, 1, 1, 1] [2022-11-23 14:42:50,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1927fd-cc25-4f5f-8a03-ae5eb76b4e71/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 14:42:51,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1927fd-cc25-4f5f-8a03-ae5eb76b4e71/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:42:51,052 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:42:51,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:42:51,052 INFO L85 PathProgramCache]: Analyzing trace with hash 940968229, now seen corresponding path program 4 times [2022-11-23 14:42:51,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:42:51,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292804999] [2022-11-23 14:42:51,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:42:51,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:42:51,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:42:51,293 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-23 14:42:51,293 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:42:51,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292804999] [2022-11-23 14:42:51,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292804999] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:42:51,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038550357] [2022-11-23 14:42:51,294 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 14:42:51,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:42:51,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1927fd-cc25-4f5f-8a03-ae5eb76b4e71/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:42:51,295 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1927fd-cc25-4f5f-8a03-ae5eb76b4e71/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:42:51,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1927fd-cc25-4f5f-8a03-ae5eb76b4e71/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 14:42:51,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:42:51,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-23 14:42:51,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:42:51,403 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-23 14:42:51,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:42:51,626 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-23 14:42:51,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038550357] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:42:51,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1264508604] [2022-11-23 14:42:51,628 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-23 14:42:51,628 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:42:51,628 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:42:51,628 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:42:51,629 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:42:51,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:51,655 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 14:42:51,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-11-23 14:42:51,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:51,682 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:42:51,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-23 14:42:51,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:51,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-23 14:42:51,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:51,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:51,768 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-23 14:42:51,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 196 treesize of output 184 [2022-11-23 14:42:51,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-23 14:42:51,818 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 14:42:51,887 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:42:52,217 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '913#(and (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= |ULTIMATE.start_main_~i~0#1| 1024) 1 0)) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 14:42:52,217 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:42:52,218 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:42:52,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-11-23 14:42:52,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451407265] [2022-11-23 14:42:52,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:42:52,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-23 14:42:52,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:42:52,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-23 14:42:52,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=553, Unknown=0, NotChecked=0, Total=870 [2022-11-23 14:42:52,220 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 25 states, 25 states have (on average 1.28) internal successors, (32), 24 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:42:52,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:42:52,430 INFO L93 Difference]: Finished difference Result 160 states and 173 transitions. [2022-11-23 14:42:52,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-23 14:42:52,432 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-11-23 14:42:52,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:42:52,436 INFO L225 Difference]: With dead ends: 160 [2022-11-23 14:42:52,436 INFO L226 Difference]: Without dead ends: 146 [2022-11-23 14:42:52,437 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 52 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=317, Invalid=553, Unknown=0, NotChecked=0, Total=870 [2022-11-23 14:42:52,438 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 317 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:42:52,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [317 Valid, 60 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:42:52,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-11-23 14:42:52,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 38. [2022-11-23 14:42:52,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.054054054054054) internal successors, (39), 37 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:42:52,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2022-11-23 14:42:52,459 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 25 [2022-11-23 14:42:52,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:42:52,459 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2022-11-23 14:42:52,459 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:42:52,459 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2022-11-23 14:42:52,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-23 14:42:52,460 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:42:52,461 INFO L195 NwaCegarLoop]: trace histogram [22, 5, 4, 1, 1, 1, 1, 1, 1] [2022-11-23 14:42:52,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1927fd-cc25-4f5f-8a03-ae5eb76b4e71/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 14:42:52,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1927fd-cc25-4f5f-8a03-ae5eb76b4e71/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:42:52,666 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:42:52,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:42:52,666 INFO L85 PathProgramCache]: Analyzing trace with hash -495149787, now seen corresponding path program 5 times [2022-11-23 14:42:52,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:42:52,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697099006] [2022-11-23 14:42:52,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:42:52,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:42:52,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:42:53,290 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-23 14:42:53,290 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:42:53,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697099006] [2022-11-23 14:42:53,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697099006] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:42:53,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65903701] [2022-11-23 14:42:53,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:42:53,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:42:53,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1927fd-cc25-4f5f-8a03-ae5eb76b4e71/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:42:53,293 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1927fd-cc25-4f5f-8a03-ae5eb76b4e71/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:42:53,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1927fd-cc25-4f5f-8a03-ae5eb76b4e71/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 14:42:53,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-23 14:42:53,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:42:53,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-23 14:42:53,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:42:53,460 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-11-23 14:42:53,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:42:53,631 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-11-23 14:42:53,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65903701] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:42:53,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [305714250] [2022-11-23 14:42:53,633 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-23 14:42:53,633 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:42:53,633 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:42:53,634 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:42:53,634 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:42:53,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:53,658 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 14:42:53,658 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-11-23 14:42:53,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:53,682 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:42:53,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-23 14:42:53,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:53,706 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-23 14:42:53,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:53,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:53,763 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-23 14:42:53,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 196 treesize of output 184 [2022-11-23 14:42:53,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-23 14:42:53,816 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 14:42:53,848 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:42:54,063 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1444#(and (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= |ULTIMATE.start_main_~i~0#1| 1024) 1 0)) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 14:42:54,064 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:42:54,064 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:42:54,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 8, 8] total 33 [2022-11-23 14:42:54,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631079867] [2022-11-23 14:42:54,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:42:54,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-23 14:42:54,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:42:54,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-23 14:42:54,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=487, Invalid=919, Unknown=0, NotChecked=0, Total=1406 [2022-11-23 14:42:54,066 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 33 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:42:54,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:42:54,836 INFO L93 Difference]: Finished difference Result 152 states and 181 transitions. [2022-11-23 14:42:54,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-11-23 14:42:54,837 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 33 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-11-23 14:42:54,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:42:54,838 INFO L225 Difference]: With dead ends: 152 [2022-11-23 14:42:54,838 INFO L226 Difference]: Without dead ends: 90 [2022-11-23 14:42:54,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 654 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1159, Invalid=2623, Unknown=0, NotChecked=0, Total=3782 [2022-11-23 14:42:54,843 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 196 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:42:54,844 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 40 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:42:54,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-11-23 14:42:54,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2022-11-23 14:42:54,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.0224719101123596) internal successors, (91), 89 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:42:54,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2022-11-23 14:42:54,872 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 37 [2022-11-23 14:42:54,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:42:54,873 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2022-11-23 14:42:54,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 33 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:42:54,873 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2022-11-23 14:42:54,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-11-23 14:42:54,875 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:42:54,875 INFO L195 NwaCegarLoop]: trace histogram [29, 28, 26, 1, 1, 1, 1, 1, 1] [2022-11-23 14:42:54,881 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1927fd-cc25-4f5f-8a03-ae5eb76b4e71/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-23 14:42:55,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1927fd-cc25-4f5f-8a03-ae5eb76b4e71/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:42:55,081 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:42:55,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:42:55,082 INFO L85 PathProgramCache]: Analyzing trace with hash 216908909, now seen corresponding path program 6 times [2022-11-23 14:42:55,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:42:55,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982443002] [2022-11-23 14:42:55,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:42:55,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:42:55,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:42:56,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1163 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2022-11-23 14:42:56,015 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:42:56,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982443002] [2022-11-23 14:42:56,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982443002] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:42:56,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920025306] [2022-11-23 14:42:56,016 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 14:42:56,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:42:56,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1927fd-cc25-4f5f-8a03-ae5eb76b4e71/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:42:56,019 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1927fd-cc25-4f5f-8a03-ae5eb76b4e71/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:42:56,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1927fd-cc25-4f5f-8a03-ae5eb76b4e71/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 14:42:56,188 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 14:42:56,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:42:56,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-23 14:42:56,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:42:56,277 INFO L134 CoverageAnalysis]: Checked inductivity of 1163 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2022-11-23 14:42:56,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:42:57,372 INFO L134 CoverageAnalysis]: Checked inductivity of 1163 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2022-11-23 14:42:57,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920025306] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:42:57,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1305613509] [2022-11-23 14:42:57,375 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-23 14:42:57,375 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:42:57,375 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:42:57,376 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:42:57,376 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:42:57,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:57,408 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:42:57,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-23 14:42:57,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:57,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-23 14:42:57,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:57,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-23 14:42:57,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:57,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:57,511 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-23 14:42:57,511 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 196 treesize of output 184 [2022-11-23 14:42:57,552 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-23 14:42:57,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 14:42:57,648 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:42:58,862 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2441#(and (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= |ULTIMATE.start_main_~i~0#1| 1024) 1 0)) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 14:42:58,863 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:42:58,863 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:42:58,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 56 [2022-11-23 14:42:58,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404994297] [2022-11-23 14:42:58,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:42:58,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-11-23 14:42:58,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:42:58,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-11-23 14:42:58,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1613, Invalid=2169, Unknown=0, NotChecked=0, Total=3782 [2022-11-23 14:42:58,866 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand has 57 states, 57 states have (on average 1.1228070175438596) internal successors, (64), 56 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:42:59,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:42:59,422 INFO L93 Difference]: Finished difference Result 336 states and 365 transitions. [2022-11-23 14:42:59,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-11-23 14:42:59,423 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.1228070175438596) internal successors, (64), 56 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2022-11-23 14:42:59,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:42:59,424 INFO L225 Difference]: With dead ends: 336 [2022-11-23 14:42:59,424 INFO L226 Difference]: Without dead ends: 274 [2022-11-23 14:42:59,426 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 204 SyntacticMatches, 29 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2887 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1613, Invalid=2169, Unknown=0, NotChecked=0, Total=3782 [2022-11-23 14:42:59,427 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 430 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 430 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:42:59,427 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [430 Valid, 99 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 14:42:59,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2022-11-23 14:42:59,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 118. [2022-11-23 14:42:59,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.017094017094017) internal successors, (119), 117 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:42:59,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 119 transitions. [2022-11-23 14:42:59,456 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 119 transitions. Word has length 89 [2022-11-23 14:42:59,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:42:59,457 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 119 transitions. [2022-11-23 14:42:59,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.1228070175438596) internal successors, (64), 56 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:42:59,457 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 119 transitions. [2022-11-23 14:42:59,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-11-23 14:42:59,460 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:42:59,460 INFO L195 NwaCegarLoop]: trace histogram [54, 29, 28, 1, 1, 1, 1, 1, 1] [2022-11-23 14:42:59,466 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1927fd-cc25-4f5f-8a03-ae5eb76b4e71/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-23 14:42:59,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1927fd-cc25-4f5f-8a03-ae5eb76b4e71/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-23 14:42:59,667 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:42:59,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:42:59,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1998833773, now seen corresponding path program 7 times [2022-11-23 14:42:59,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:42:59,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75935827] [2022-11-23 14:42:59,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:42:59,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:42:59,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:43:02,541 INFO L134 CoverageAnalysis]: Checked inductivity of 2297 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2022-11-23 14:43:02,542 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:43:02,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75935827] [2022-11-23 14:43:02,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75935827] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:43:02,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883631375] [2022-11-23 14:43:02,542 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 14:43:02,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:43:02,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1927fd-cc25-4f5f-8a03-ae5eb76b4e71/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:43:02,544 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1927fd-cc25-4f5f-8a03-ae5eb76b4e71/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:43:02,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1927fd-cc25-4f5f-8a03-ae5eb76b4e71/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-23 14:43:02,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:43:02,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 679 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-23 14:43:02,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:43:02,886 INFO L134 CoverageAnalysis]: Checked inductivity of 2297 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2022-11-23 14:43:02,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:43:06,888 INFO L134 CoverageAnalysis]: Checked inductivity of 2297 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2022-11-23 14:43:06,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883631375] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:43:06,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1445571040] [2022-11-23 14:43:06,890 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-23 14:43:06,890 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:43:06,891 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:43:06,891 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:43:06,891 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:43:06,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:06,921 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:43:06,921 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-23 14:43:06,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:06,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-23 14:43:06,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:06,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-23 14:43:06,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:06,992 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:43:07,013 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-23 14:43:07,013 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 186 treesize of output 185 [2022-11-23 14:43:07,074 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-23 14:43:07,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 14:43:07,152 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:43:08,860 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3932#(and (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= |ULTIMATE.start_main_~i~0#1| 1024) 1 0)) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 14:43:08,860 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:43:08,860 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:43:08,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56, 56] total 112 [2022-11-23 14:43:08,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001576188] [2022-11-23 14:43:08,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:43:08,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2022-11-23 14:43:08,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:43:08,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2022-11-23 14:43:08,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6345, Invalid=7461, Unknown=0, NotChecked=0, Total=13806 [2022-11-23 14:43:08,869 INFO L87 Difference]: Start difference. First operand 118 states and 119 transitions. Second operand has 113 states, 113 states have (on average 1.0619469026548674) internal successors, (120), 112 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:43:12,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:43:12,376 INFO L93 Difference]: Finished difference Result 728 states and 785 transitions. [2022-11-23 14:43:12,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-11-23 14:43:12,377 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 1.0619469026548674) internal successors, (120), 112 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2022-11-23 14:43:12,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:43:12,379 INFO L225 Difference]: With dead ends: 728 [2022-11-23 14:43:12,379 INFO L226 Difference]: Without dead ends: 666 [2022-11-23 14:43:12,383 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 260 SyntacticMatches, 29 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5855 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=6345, Invalid=7461, Unknown=0, NotChecked=0, Total=13806 [2022-11-23 14:43:12,384 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 1731 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 548 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1731 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 971 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 548 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-23 14:43:12,384 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1731 Valid, 264 Invalid, 971 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [548 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-23 14:43:12,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2022-11-23 14:43:12,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 174. [2022-11-23 14:43:12,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 1.0115606936416186) internal successors, (175), 173 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:43:12,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 175 transitions. [2022-11-23 14:43:12,424 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 175 transitions. Word has length 117 [2022-11-23 14:43:12,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:43:12,424 INFO L495 AbstractCegarLoop]: Abstraction has 174 states and 175 transitions. [2022-11-23 14:43:12,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 1.0619469026548674) internal successors, (120), 112 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:43:12,425 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 175 transitions. [2022-11-23 14:43:12,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-11-23 14:43:12,427 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:43:12,428 INFO L195 NwaCegarLoop]: trace histogram [110, 29, 28, 1, 1, 1, 1, 1, 1] [2022-11-23 14:43:12,434 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1927fd-cc25-4f5f-8a03-ae5eb76b4e71/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-23 14:43:12,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1927fd-cc25-4f5f-8a03-ae5eb76b4e71/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-23 14:43:12,634 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:43:12,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:43:12,635 INFO L85 PathProgramCache]: Analyzing trace with hash -196751251, now seen corresponding path program 8 times [2022-11-23 14:43:12,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:43:12,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029790166] [2022-11-23 14:43:12,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:43:12,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:43:12,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:43:21,646 INFO L134 CoverageAnalysis]: Checked inductivity of 6917 backedges. 0 proven. 6105 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2022-11-23 14:43:21,647 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:43:21,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029790166] [2022-11-23 14:43:21,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029790166] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:43:21,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453532541] [2022-11-23 14:43:21,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:43:21,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:43:21,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1927fd-cc25-4f5f-8a03-ae5eb76b4e71/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:43:21,651 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1927fd-cc25-4f5f-8a03-ae5eb76b4e71/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:43:21,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1927fd-cc25-4f5f-8a03-ae5eb76b4e71/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-23 14:47:13,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 29 check-sat command(s) [2022-11-23 14:47:13,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:47:13,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 697 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-23 14:47:13,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:47:13,419 INFO L134 CoverageAnalysis]: Checked inductivity of 6917 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 6105 trivial. 0 not checked. [2022-11-23 14:47:13,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:47:16,494 INFO L134 CoverageAnalysis]: Checked inductivity of 6917 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 6105 trivial. 0 not checked. [2022-11-23 14:47:16,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453532541] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:47:16,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1654615556] [2022-11-23 14:47:16,496 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-23 14:47:16,496 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:47:16,496 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:47:16,497 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:47:16,497 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:47:16,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:47:16,520 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 14:47:16,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-11-23 14:47:16,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:47:16,541 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:47:16,541 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-23 14:47:16,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:47:16,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-23 14:47:16,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:47:16,601 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:47:16,623 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-23 14:47:16,623 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 186 treesize of output 185 [2022-11-23 14:47:16,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-23 14:47:16,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 14:47:16,742 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:47:17,215 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6407#(and (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= |ULTIMATE.start_main_~i~0#1| 1024) 1 0)) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 14:47:17,215 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:47:17,215 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:47:17,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [112, 32, 32] total 145 [2022-11-23 14:47:17,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051290404] [2022-11-23 14:47:17,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:47:17,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 145 states [2022-11-23 14:47:17,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:47:17,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 145 interpolants. [2022-11-23 14:47:17,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10175, Invalid=12175, Unknown=0, NotChecked=0, Total=22350 [2022-11-23 14:47:17,224 INFO L87 Difference]: Start difference. First operand 174 states and 175 transitions. Second operand has 145 states, 145 states have (on average 1.6689655172413793) internal successors, (242), 145 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:47:29,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:47:29,853 INFO L93 Difference]: Finished difference Result 712 states and 853 transitions. [2022-11-23 14:47:29,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 254 states. [2022-11-23 14:47:29,854 INFO L78 Accepts]: Start accepts. Automaton has has 145 states, 145 states have (on average 1.6689655172413793) internal successors, (242), 145 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 173 [2022-11-23 14:47:29,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:47:29,856 INFO L225 Difference]: With dead ends: 712 [2022-11-23 14:47:29,857 INFO L226 Difference]: Without dead ends: 426 [2022-11-23 14:47:29,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 741 GetRequests, 481 SyntacticMatches, 0 SemanticMatches, 260 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8422 ImplicationChecksByTransitivity, 15.9s TimeCoverageRelationStatistics Valid=23167, Invalid=45215, Unknown=0, NotChecked=0, Total=68382 [2022-11-23 14:47:29,865 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 1421 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 838 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1421 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 1387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 838 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:47:29,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1421 Valid, 132 Invalid, 1387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [838 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-23 14:47:29,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2022-11-23 14:47:30,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 426. [2022-11-23 14:47:30,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 425 states have (on average 1.0047058823529411) internal successors, (427), 425 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:47:30,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 427 transitions. [2022-11-23 14:47:30,169 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 427 transitions. Word has length 173 [2022-11-23 14:47:30,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:47:30,170 INFO L495 AbstractCegarLoop]: Abstraction has 426 states and 427 transitions. [2022-11-23 14:47:30,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 145 states, 145 states have (on average 1.6689655172413793) internal successors, (242), 145 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:47:30,170 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 427 transitions. [2022-11-23 14:47:30,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 426 [2022-11-23 14:47:30,179 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:47:30,179 INFO L195 NwaCegarLoop]: trace histogram [141, 140, 138, 1, 1, 1, 1, 1, 1] [2022-11-23 14:47:30,215 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1927fd-cc25-4f5f-8a03-ae5eb76b4e71/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-11-23 14:47:30,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1927fd-cc25-4f5f-8a03-ae5eb76b4e71/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:47:30,395 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:47:30,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:47:30,395 INFO L85 PathProgramCache]: Analyzing trace with hash 841606077, now seen corresponding path program 9 times [2022-11-23 14:47:30,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:47:30,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138618773] [2022-11-23 14:47:30,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:47:30,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:47:30,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:47:45,154 INFO L134 CoverageAnalysis]: Checked inductivity of 29331 backedges. 0 proven. 9591 refuted. 0 times theorem prover too weak. 19740 trivial. 0 not checked. [2022-11-23 14:47:45,155 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:47:45,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138618773] [2022-11-23 14:47:45,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138618773] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:47:45,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708851352] [2022-11-23 14:47:45,155 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 14:47:45,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:47:45,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1927fd-cc25-4f5f-8a03-ae5eb76b4e71/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:47:45,158 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1927fd-cc25-4f5f-8a03-ae5eb76b4e71/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:47:45,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1927fd-cc25-4f5f-8a03-ae5eb76b4e71/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-23 14:47:45,711 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 14:47:45,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:47:45,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 1995 conjuncts, 140 conjunts are in the unsatisfiable core [2022-11-23 14:47:45,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:47:45,994 INFO L134 CoverageAnalysis]: Checked inductivity of 29331 backedges. 0 proven. 9591 refuted. 0 times theorem prover too weak. 19740 trivial. 0 not checked. [2022-11-23 14:47:45,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:48:09,518 INFO L134 CoverageAnalysis]: Checked inductivity of 29331 backedges. 0 proven. 9591 refuted. 0 times theorem prover too weak. 19740 trivial. 0 not checked. [2022-11-23 14:48:09,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708851352] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:48:09,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [607642818] [2022-11-23 14:48:09,521 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-23 14:48:09,521 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:48:09,521 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:48:09,521 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:48:09,522 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:48:09,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:48:09,545 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 14:48:09,545 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-11-23 14:48:09,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:48:09,566 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:48:09,567 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-23 14:48:09,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:48:09,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-23 14:48:09,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:48:09,622 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:48:09,644 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-23 14:48:09,644 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 186 treesize of output 185 [2022-11-23 14:48:09,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-23 14:48:09,713 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 14:48:09,768 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:48:24,597 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11188#(and (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= |ULTIMATE.start_main_~i~0#1| 1024) 1 0)) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 14:48:24,598 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:48:24,598 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:48:24,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [140, 140, 140] total 280 [2022-11-23 14:48:24,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840144339] [2022-11-23 14:48:24,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:48:24,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 281 states [2022-11-23 14:48:24,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:48:24,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 281 interpolants. [2022-11-23 14:48:24,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39357, Invalid=42153, Unknown=0, NotChecked=0, Total=81510 [2022-11-23 14:48:24,616 INFO L87 Difference]: Start difference. First operand 426 states and 427 transitions. Second operand has 281 states, 281 states have (on average 1.0249110320284698) internal successors, (288), 280 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:49:10,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:49:10,235 INFO L93 Difference]: Finished difference Result 1680 states and 1821 transitions. [2022-11-23 14:49:10,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 280 states. [2022-11-23 14:49:10,236 INFO L78 Accepts]: Start accepts. Automaton has has 281 states, 281 states have (on average 1.0249110320284698) internal successors, (288), 280 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 425 [2022-11-23 14:49:10,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:49:10,241 INFO L225 Difference]: With dead ends: 1680 [2022-11-23 14:49:10,241 INFO L226 Difference]: Without dead ends: 1394 [2022-11-23 14:49:10,245 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1413 GetRequests, 988 SyntacticMatches, 141 SemanticMatches, 284 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61575 ImplicationChecksByTransitivity, 45.8s TimeCoverageRelationStatistics Valid=39357, Invalid=42153, Unknown=0, NotChecked=0, Total=81510 [2022-11-23 14:49:10,246 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3392 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 985 mSolverCounterSat, 1289 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3392 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 2274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1289 IncrementalHoareTripleChecker+Valid, 985 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-23 14:49:10,246 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3392 Valid, 429 Invalid, 2274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1289 Valid, 985 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-23 14:49:10,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1394 states. [2022-11-23 14:49:10,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1394 to 566. [2022-11-23 14:49:10,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 566 states, 565 states have (on average 1.0035398230088495) internal successors, (567), 565 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:49:10,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 567 transitions. [2022-11-23 14:49:10,543 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 567 transitions. Word has length 425 [2022-11-23 14:49:10,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:49:10,543 INFO L495 AbstractCegarLoop]: Abstraction has 566 states and 567 transitions. [2022-11-23 14:49:10,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 281 states, 281 states have (on average 1.0249110320284698) internal successors, (288), 280 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:49:10,544 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 567 transitions. [2022-11-23 14:49:10,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 566 [2022-11-23 14:49:10,557 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:49:10,557 INFO L195 NwaCegarLoop]: trace histogram [278, 141, 140, 1, 1, 1, 1, 1, 1] [2022-11-23 14:49:10,571 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1927fd-cc25-4f5f-8a03-ae5eb76b4e71/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-23 14:49:10,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1927fd-cc25-4f5f-8a03-ae5eb76b4e71/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:49:10,767 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:49:10,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:49:10,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1524369475, now seen corresponding path program 10 times [2022-11-23 14:49:10,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:49:10,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106844963] [2022-11-23 14:49:10,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:49:10,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:49:11,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:50:02,606 INFO L134 CoverageAnalysis]: Checked inductivity of 58521 backedges. 0 proven. 38781 refuted. 0 times theorem prover too weak. 19740 trivial. 0 not checked. [2022-11-23 14:50:02,606 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:50:02,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106844963] [2022-11-23 14:50:02,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106844963] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:50:02,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369322071] [2022-11-23 14:50:02,607 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 14:50:02,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:50:02,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1927fd-cc25-4f5f-8a03-ae5eb76b4e71/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:50:02,611 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1927fd-cc25-4f5f-8a03-ae5eb76b4e71/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:50:02,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1927fd-cc25-4f5f-8a03-ae5eb76b4e71/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-23 14:50:03,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:50:03,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 3255 conjuncts, 280 conjunts are in the unsatisfiable core [2022-11-23 14:50:03,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:50:04,003 INFO L134 CoverageAnalysis]: Checked inductivity of 58521 backedges. 0 proven. 38781 refuted. 0 times theorem prover too weak. 19740 trivial. 0 not checked. [2022-11-23 14:50:04,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:51:38,345 INFO L134 CoverageAnalysis]: Checked inductivity of 58521 backedges. 0 proven. 38781 refuted. 0 times theorem prover too weak. 19740 trivial. 0 not checked. [2022-11-23 14:51:38,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369322071] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:51:38,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1269505650] [2022-11-23 14:51:38,348 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-23 14:51:38,348 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:51:38,348 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:51:38,349 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:51:38,349 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:51:38,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:51:38,383 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:51:38,383 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-23 14:51:38,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:51:38,391 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-23 14:51:38,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:51:38,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-23 14:51:38,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:51:38,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:51:38,451 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-23 14:51:38,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 196 treesize of output 184 [2022-11-23 14:51:38,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-23 14:51:38,496 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 14:51:38,523 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:51:39,518 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18503#(and (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= |ULTIMATE.start_main_~i~0#1| 1024) 1 0)) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 14:51:39,518 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:51:39,518 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:51:39,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [280, 280, 280] total 560 [2022-11-23 14:51:39,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722194327] [2022-11-23 14:51:39,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:51:39,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 561 states [2022-11-23 14:51:39,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:51:39,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 561 interpolants. [2022-11-23 14:51:39,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157097, Invalid=162693, Unknown=0, NotChecked=0, Total=319790 [2022-11-23 14:51:39,553 INFO L87 Difference]: Start difference. First operand 566 states and 567 transitions. Second operand has 561 states, 561 states have (on average 1.0124777183600713) internal successors, (568), 560 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)